Use Policy Translator abstract class

Instead of applications implementing the converter, use a
protected abstract class that implements common code.

Newer applications could re-use existing application, and
shared code can be put into the base translator class.

Fixed sonar issue and changed guard xml.

Removed Converter and made translator into an implementation
class that is an object in the Application Provider.

Issue-ID: POLICY-1273
Change-Id: I9b48cbcdaf80d6d2ef19ef53e4b7cd4830e7e7b2
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>

17 files changed, 878 insertions, 592 deletions

diff --git a/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyConverter.java b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyTranslator.java
index 8852eb08..f5f77d24 100644
--- a/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyConverter.java
+++ b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyTranslator.java
@@ -25,7 +25,6 @@ package org.onap.policy.pdp.xacml.application.common;
 import com.att.research.xacml.api.Request;
 import com.att.research.xacml.api.Response;
 
-import java.io.InputStream;
 import java.util.List;
 import java.util.Map;
 
@@ -34,13 +33,33 @@ import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicyType;
 import org.onap.policy.models.decisions.concepts.DecisionRequest;
 import org.onap.policy.models.decisions.concepts.DecisionResponse;
 
-public interface ToscaPolicyConverter {
+public interface ToscaPolicyTranslator {
 
-    List<PolicyType> convertPolicies(InputStream isToscaPolicy) throws ToscaPolicyConversionException;
-
-    List<PolicyType> convertPolicies(Map<String, Object> toscaObject) throws ToscaPolicyConversionException;
+    /**
+     * Implement this method to translate policies.
+     *
+     * @param toscaObject Incoming Tosca Policies object
+     * @return List of translated policies
+     * @throws ToscaPolicyConversionException Exception
+     */
+    List<PolicyType> scanAndConvertPolicies(Map<String, Object> toscaObject) throws ToscaPolicyConversionException;
 
+    /**
+     * Implement this method to convert an ONAP DecisionRequest into
+     * a Xacml request.
+     *
+     * @param request Incoming DecisionRequest
+     * @return Xacml Request object
+     */
     Request convertRequest(DecisionRequest request);
 
-    DecisionResponse convertResponse(Response response);
+    /**
+     * Implement this method to convert a Xacml Response
+     * into a ONAP DecisionResponse.
+     *
+     * @param xacmlResponse Input Xacml Response
+     * @return DecisionResponse object
+     */
+    DecisionResponse convertResponse(Response xacmlResponse);
+
 }
diff --git a/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyConverterUtils.java b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyTranslatorUtils.java
index cd197935..cdf5404b 100644
--- a/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyConverterUtils.java
+++ b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyTranslatorUtils.java
@@ -35,9 +35,9 @@ import oasis.names.tc.xacml._3_0.core.schema.wd_17.MatchType;
  * @author pameladragosh
  *
  */
-public final class ToscaPolicyConverterUtils {
+public final class ToscaPolicyTranslatorUtils {
 
-    private ToscaPolicyConverterUtils() {
+    private ToscaPolicyTranslatorUtils() {
         super();
     }
 
diff --git a/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdCombinedPolicyRequest.java b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdCombinedPolicyRequest.java
new file mode 100644
index 00000000..3914ba60
--- /dev/null
+++ b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdCombinedPolicyRequest.java
@@ -0,0 +1,84 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pdp.xacml.application.common.std;
+
+import com.att.research.xacml.std.annotations.XACMLAction;
+import com.att.research.xacml.std.annotations.XACMLRequest;
+import com.att.research.xacml.std.annotations.XACMLResource;
+import com.att.research.xacml.std.annotations.XACMLSubject;
+
+import java.util.Map;
+import java.util.Map.Entry;
+
+import org.onap.policy.models.decisions.concepts.DecisionRequest;
+
+@XACMLRequest(ReturnPolicyIdList = true)
+public class StdCombinedPolicyRequest {
+
+    public StdCombinedPolicyRequest() {
+        super();
+    }
+
+    @XACMLSubject(includeInResults = true)
+    String onapName = "DCAE";
+
+    @XACMLResource(includeInResults = true)
+    String resource = "onap.policies.Monitoring";
+
+    @XACMLAction()
+    String action = "configure";
+
+
+    /**
+     * Parses the DecisionRequest into a MonitoringRequest.
+     *
+     * @param decisionRequest Input DecisionRequest
+     * @return MonitoringRequest
+     */
+    public static StdCombinedPolicyRequest createInstance(DecisionRequest decisionRequest) {
+        StdCombinedPolicyRequest request = new StdCombinedPolicyRequest();
+        request.onapName = decisionRequest.getOnapName();
+        request.action = decisionRequest.getAction();
+
+        Map<String, Object> resources = decisionRequest.getResource();
+        for (Entry<String, Object> entry : resources.entrySet()) {
+            if ("policy-id".equals(entry.getKey())) {
+                //
+                // TODO handle lists of policies
+                //
+                request.resource = entry.getValue().toString();
+                continue;
+            }
+            if ("policy-type".equals(entry.getKey())) {
+                //
+                // TODO handle lists of policies
+                //
+                request.resource = entry.getValue().toString();
+            }
+        }
+        //
+        // TODO handle a bad incoming request. Do that here?
+        //
+        return request;
+    }
+}
diff --git a/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdCombinedPolicyResultsTranslator.java b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdCombinedPolicyResultsTranslator.java
new file mode 100644
index 00000000..b39c2e60
--- /dev/null
+++ b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdCombinedPolicyResultsTranslator.java
@@ -0,0 +1,373 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pdp.xacml.application.common.std;
+
+import com.att.research.xacml.api.AttributeAssignment;
+import com.att.research.xacml.api.DataTypeException;
+import com.att.research.xacml.api.Decision;
+import com.att.research.xacml.api.Obligation;
+import com.att.research.xacml.api.Request;
+import com.att.research.xacml.api.Response;
+import com.att.research.xacml.api.Result;
+import com.att.research.xacml.api.XACML3;
+import com.att.research.xacml.std.annotations.RequestParser;
+import com.att.research.xacml.util.XACMLPolicyWriter;
+import com.google.gson.Gson;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.AnyOfType;
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.AttributeAssignmentExpressionType;
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.AttributeValueType;
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.EffectType;
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.MatchType;
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.ObjectFactory;
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.ObligationExpressionType;
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.ObligationExpressionsType;
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicyType;
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.RuleType;
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.TargetType;
+
+import org.json.JSONObject;
+import org.onap.policy.models.decisions.concepts.DecisionRequest;
+import org.onap.policy.models.decisions.concepts.DecisionResponse;
+import org.onap.policy.pdp.xacml.application.common.ToscaDictionary;
+import org.onap.policy.pdp.xacml.application.common.ToscaPolicyConversionException;
+import org.onap.policy.pdp.xacml.application.common.ToscaPolicyTranslator;
+import org.onap.policy.pdp.xacml.application.common.ToscaPolicyTranslatorUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class StdCombinedPolicyResultsTranslator implements ToscaPolicyTranslator {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(StdCombinedPolicyResultsTranslator.class);
+
+    public StdCombinedPolicyResultsTranslator() {
+        super();
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public List<PolicyType> scanAndConvertPolicies(Map<String, Object> toscaObject)
+            throws ToscaPolicyConversionException {
+        //
+        // Our return object
+        //
+        List<PolicyType> scannedPolicies = new ArrayList<>();
+        //
+        // Iterate each of the Policies
+        //
+        List<Object> policies = (List<Object>) toscaObject.get("policies");
+        for (Object policyObject : policies) {
+            //
+            // Get the contents
+            //
+            LOGGER.debug("Found policy {}", policyObject.getClass());
+            Map<String, Object> policyContents = (Map<String, Object>) policyObject;
+            for (Entry<String, Object> entrySet : policyContents.entrySet()) {
+                LOGGER.debug("Entry set {}", entrySet);
+                //
+                // Convert this policy
+                //
+                PolicyType policy = this.convertPolicy(entrySet);
+                try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
+                    XACMLPolicyWriter.writePolicyFile(os, policy);
+                    LOGGER.debug("{}", os);
+                } catch (IOException e) {
+                    LOGGER.error("Failed to convert {}", e);
+                }
+                //
+                // Convert and add in the new policy
+                //
+                scannedPolicies.add(policy);
+            }
+        }
+
+        return scannedPolicies;
+    }
+
+    @Override
+    public Request convertRequest(DecisionRequest request) {
+        LOGGER.debug("Converting Request {}", request);
+        try {
+            return RequestParser.parseRequest(StdCombinedPolicyRequest.createInstance(request));
+        } catch (IllegalArgumentException | IllegalAccessException | DataTypeException e) {
+            LOGGER.error("Failed to convert DecisionRequest: {}", e);
+        }
+        //
+        // TODO throw exception
+        //
+        return null;
+    }
+
+    @Override
+    public DecisionResponse convertResponse(Response xacmlResponse) {
+        LOGGER.debug("Converting Response {}", xacmlResponse);
+        DecisionResponse decisionResponse = new DecisionResponse();
+        //
+        // Iterate through all the results
+        //
+        for (Result xacmlResult : xacmlResponse.getResults()) {
+            //
+            // Check the result
+            //
+            if (xacmlResult.getDecision() == Decision.PERMIT) {
+                //
+                // Setup policies
+                //
+                decisionResponse.setPolicies(new ArrayList<>());
+                //
+                // Go through obligations
+                //
+                for (Obligation obligation : xacmlResult.getObligations()) {
+                    LOGGER.debug("Obligation: {}", obligation);
+                    for (AttributeAssignment assignment : obligation.getAttributeAssignments()) {
+                        LOGGER.debug("Attribute Assignment: {}", assignment);
+                        //
+                        // We care about the content attribute
+                        //
+                        if (ToscaDictionary.ID_OBLIGATION_POLICY_MONITORING_CONTENTS
+                                .equals(assignment.getAttributeId())) {
+                            //
+                            // The contents are in Json form
+                            //
+                            Object stringContents = assignment.getAttributeValue().getValue();
+                            if (LOGGER.isDebugEnabled()) {
+                                LOGGER.debug("DCAE contents: {}{}", System.lineSeparator(), stringContents);
+                            }
+                            //
+                            // Let's parse it into a map using Gson
+                            //
+                            Gson gson = new Gson();
+                            @SuppressWarnings("unchecked")
+                            Map<String, Object> result = gson.fromJson(stringContents.toString() ,Map.class);
+                            decisionResponse.getPolicies().add(result);
+                        }
+                    }
+                }
+            } else {
+                decisionResponse.setErrorMessage("A better error message");
+            }
+        }
+
+        return decisionResponse;
+    }
+
+    @SuppressWarnings("unchecked")
+    protected PolicyType convertPolicy(Entry<String, Object> entrySet) throws ToscaPolicyConversionException {
+        //
+        // Policy name should be at the root
+        //
+        String policyName = entrySet.getKey();
+        Map<String, Object> policyDefinition = (Map<String, Object>) entrySet.getValue();
+        //
+        // Set it as the policy ID
+        //
+        PolicyType newPolicyType = new PolicyType();
+        newPolicyType.setPolicyId(policyName);
+        //
+        // Optional description
+        //
+        if (policyDefinition.containsKey("description")) {
+            newPolicyType.setDescription(policyDefinition.get("description").toString());
+        }
+        //
+        // There should be a metadata section
+        //
+        if (! policyDefinition.containsKey("metadata")) {
+            throw new ToscaPolicyConversionException(policyName + " missing metadata section");
+        }
+        this.fillMetadataSection(newPolicyType,
+                (Map<String, Object>) policyDefinition.get("metadata"));
+        //
+        // Set the combining rule
+        //
+        newPolicyType.setRuleCombiningAlgId(XACML3.ID_RULE_FIRST_APPLICABLE.stringValue());
+        //
+        // Generate the TargetType
+        //
+        //
+        // There should be a metadata section
+        //
+        if (! policyDefinition.containsKey("type")) {
+            throw new ToscaPolicyConversionException(policyName + " missing type value");
+        }
+        if (! policyDefinition.containsKey("version")) {
+            throw new ToscaPolicyConversionException(policyName + " missing version value");
+        }
+        TargetType target = this.generateTargetType(policyName,
+                policyDefinition.get("type").toString(),
+                policyDefinition.get("version").toString());
+        newPolicyType.setTarget(target);
+        //
+        // Now create the Permit Rule
+        // No target since the policy has a target
+        // With obligations.
+        //
+        RuleType rule = new RuleType();
+        rule.setDescription("Default is to PERMIT if the policy matches.");
+        rule.setRuleId(policyName + ":rule");
+        rule.setEffect(EffectType.PERMIT);
+        rule.setTarget(new TargetType());
+        //
+        // Now represent the policy as Json
+        //
+        JSONObject jsonObligation = new JSONObject();
+        jsonObligation.put(policyName, policyDefinition);
+        addObligation(rule, jsonObligation);
+        //
+        // Add the rule to the policy
+        //
+        newPolicyType.getCombinerParametersOrRuleCombinerParametersOrVariableDefinition().add(rule);
+        //
+        // Return our new policy
+        //
+        return newPolicyType;
+    }
+
+    /**
+     * From the TOSCA metadata section, pull in values that are needed into the XACML policy.
+     *
+     * @param policy Policy Object to store the metadata
+     * @param metadata The Metadata TOSCA Map
+     * @return Same Policy Object
+     * @throws ToscaPolicyConversionException If there is something missing from the metadata
+     */
+    protected PolicyType fillMetadataSection(PolicyType policy,
+            Map<String, Object> metadata) throws ToscaPolicyConversionException {
+        if (! metadata.containsKey("policy-id")) {
+            throw new ToscaPolicyConversionException(policy.getPolicyId() + " missing metadata policy-id");
+        } else {
+            //
+            // Do nothing here - the XACML PolicyId is used from TOSCA Policy Name field
+            //
+        }
+        if (! metadata.containsKey("policy-version")) {
+            throw new ToscaPolicyConversionException(policy.getPolicyId() + " missing metadata policy-version");
+        } else {
+            //
+            // Add in the Policy Version
+            //
+            policy.setVersion(metadata.get("policy-version").toString());
+        }
+        return policy;
+    }
+
+    protected TargetType generateTargetType(String policyId, String policyType, String policyTypeVersion) {
+        //
+        // Create all the match's that are possible
+        //
+        // This is for the Policy Id
+        //
+        MatchType matchPolicyId = ToscaPolicyTranslatorUtils.buildMatchTypeDesignator(
+                XACML3.ID_FUNCTION_STRING_EQUAL,
+                policyId,
+                XACML3.ID_DATATYPE_STRING,
+                ToscaDictionary.ID_RESOURCE_POLICY_ID,
+                XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE);
+        //
+        // This is for the Policy Type
+        //
+        MatchType matchPolicyType = ToscaPolicyTranslatorUtils.buildMatchTypeDesignator(
+                XACML3.ID_FUNCTION_STRING_EQUAL,
+                policyType,
+                XACML3.ID_DATATYPE_STRING,
+                ToscaDictionary.ID_RESOURCE_POLICY_TYPE,
+                XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE);
+        //
+        // This is for the Policy Type version
+        //
+        MatchType matchPolicyTypeVersion = ToscaPolicyTranslatorUtils.buildMatchTypeDesignator(
+                XACML3.ID_FUNCTION_STRING_EQUAL,
+                policyTypeVersion,
+                XACML3.ID_DATATYPE_STRING,
+                ToscaDictionary.ID_RESOURCE_POLICY_TYPE_VERSION,
+                XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE);
+        //
+        // This is our outer AnyOf - which is an OR
+        //
+        AnyOfType anyOf = new AnyOfType();
+        //
+        // Create AllOf (AND) of just Policy Id
+        //
+        anyOf.getAllOf().add(ToscaPolicyTranslatorUtils.buildAllOf(matchPolicyId));
+        //
+        // Create AllOf (AND) of just Policy Type
+        //
+        anyOf.getAllOf().add(ToscaPolicyTranslatorUtils.buildAllOf(matchPolicyType));
+        //
+        // Create AllOf (AND) of Policy Type and Policy Type Version
+        //
+        anyOf.getAllOf().add(ToscaPolicyTranslatorUtils.buildAllOf(matchPolicyType, matchPolicyTypeVersion));
+        //
+        // Now we can create the TargetType, add the top-level anyOf (OR),
+        // and return the value.
+        //
+        TargetType target = new TargetType();
+        target.getAnyOf().add(anyOf);
+        return target;
+    }
+
+    protected RuleType addObligation(RuleType rule, JSONObject jsonPolicy) {
+        //
+        // Convert the YAML Policy to JSON Object
+        //
+        if (LOGGER.isDebugEnabled()) {
+            LOGGER.debug("JSON DCAE Policy {}{}", System.lineSeparator(), jsonPolicy);
+        }
+        //
+        // Create an AttributeValue for it
+        //
+        AttributeValueType value = new AttributeValueType();
+        value.setDataType(ToscaDictionary.ID_OBLIGATION_POLICY_MONITORING_DATATYPE.stringValue());
+        value.getContent().add(jsonPolicy.toString());
+        //
+        // Create our AttributeAssignmentExpression where we will
+        // store the contents of the policy in JSON format.
+        //
+        AttributeAssignmentExpressionType expressionType = new AttributeAssignmentExpressionType();
+        expressionType.setAttributeId(ToscaDictionary.ID_OBLIGATION_POLICY_MONITORING_CONTENTS.stringValue());
+        ObjectFactory factory = new ObjectFactory();
+        expressionType.setExpression(factory.createAttributeValue(value));
+        //
+        // Create an ObligationExpression for it
+        //
+        ObligationExpressionType obligation = new ObligationExpressionType();
+        obligation.setFulfillOn(EffectType.PERMIT);
+        obligation.setObligationId(ToscaDictionary.ID_OBLIGATION_REST_BODY.stringValue());
+        obligation.getAttributeAssignmentExpression().add(expressionType);
+        //
+        // Now we can add it into the rule
+        //
+        ObligationExpressionsType obligations = new ObligationExpressionsType();
+        obligations.getObligationExpression().add(obligation);
+        rule.setObligationExpressions(obligations);
+        return rule;
+    }
+
+}
diff --git a/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdMetadataTranslator.java b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdMetadataTranslator.java
new file mode 100644
index 00000000..11651f4f
--- /dev/null
+++ b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdMetadataTranslator.java
@@ -0,0 +1,110 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pdp.xacml.application.common.std;
+
+import com.att.research.xacml.api.Request;
+import com.att.research.xacml.api.Response;
+import com.att.research.xacml.util.XACMLPolicyWriter;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicyType;
+
+import org.onap.policy.models.decisions.concepts.DecisionRequest;
+import org.onap.policy.models.decisions.concepts.DecisionResponse;
+import org.onap.policy.pdp.xacml.application.common.ToscaPolicyConversionException;
+import org.onap.policy.pdp.xacml.application.common.ToscaPolicyTranslator;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class StdMetadataTranslator implements ToscaPolicyTranslator {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(StdMetadataTranslator.class);
+
+    public StdMetadataTranslator() {
+        super();
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public List<PolicyType> scanAndConvertPolicies(Map<String, Object> toscaObject)
+            throws ToscaPolicyConversionException {
+        //
+        // Our return object
+        //
+        List<PolicyType> scannedPolicies = new ArrayList<>();
+        //
+        // Iterate each of the Policies
+        //
+        List<Object> policies = (List<Object>) toscaObject.get("policies");
+        for (Object policyObject : policies) {
+            //
+            // Get the contents
+            //
+            LOGGER.debug("Found policy {}", policyObject.getClass());
+            Map<String, Object> policyContents = (Map<String, Object>) policyObject;
+            for (Entry<String, Object> entrySet : policyContents.entrySet()) {
+                LOGGER.debug("Entry set {}", entrySet);
+                //
+                // Convert this policy
+                //
+                PolicyType policy = this.convertPolicy(entrySet);
+                try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
+                    XACMLPolicyWriter.writePolicyFile(os, policy);
+                    LOGGER.debug("{}", os);
+                } catch (IOException e) {
+                    LOGGER.error("Failed to convert {}", e);
+                }
+                //
+                // Convert and add in the new policy
+                //
+                scannedPolicies.add(policy);
+            }
+        }
+
+        return scannedPolicies;
+    }
+
+    @Override
+    public Request convertRequest(DecisionRequest request) {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    @Override
+    public DecisionResponse convertResponse(Response xacmlResponse) {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    private PolicyType convertPolicy(Entry<String, Object> entrySet) throws ToscaPolicyConversionException {
+
+        return null;
+    }
+
+}
diff --git a/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdXacmlApplicationServiceProvider.java b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdXacmlApplicationServiceProvider.java
new file mode 100644
index 00000000..826acbc3
--- /dev/null
+++ b/applications/common/src/main/java/org/onap/policy/pdp/xacml/application/common/std/StdXacmlApplicationServiceProvider.java
@@ -0,0 +1,211 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pdp.xacml.application.common.std;
+
+import com.att.research.xacml.api.Request;
+import com.att.research.xacml.api.Response;
+import com.att.research.xacml.api.pdp.PDPEngine;
+import com.att.research.xacml.api.pdp.PDPEngineFactory;
+import com.att.research.xacml.api.pdp.PDPException;
+import com.att.research.xacml.util.FactoryException;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+
+import org.onap.policy.models.decisions.concepts.DecisionRequest;
+import org.onap.policy.models.decisions.concepts.DecisionResponse;
+import org.onap.policy.pdp.xacml.application.common.XacmlApplicationServiceProvider;
+import org.onap.policy.pdp.xacml.application.common.XacmlPolicyUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class StdXacmlApplicationServiceProvider implements XacmlApplicationServiceProvider {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(StdXacmlApplicationServiceProvider.class);
+    private Path pathForData = null;
+    private Properties pdpProperties = null;
+    private PDPEngine pdpEngine = null;
+
+    public StdXacmlApplicationServiceProvider() {
+        super();
+    }
+
+    @Override
+    public String applicationName() {
+        return "Please Override";
+    }
+
+    @Override
+    public List<String> actionDecisionsSupported() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public void initialize(Path pathForData) {
+        //
+        // Save our path
+        //
+        this.pathForData = pathForData;
+        LOGGER.debug("New Path is {}", this.pathForData.toAbsolutePath());
+        //
+        // Look for and load the properties object
+        //
+        try {
+            pdpProperties = XacmlPolicyUtils.loadXacmlProperties(XacmlPolicyUtils.getPropertiesPath(pathForData));
+            LOGGER.debug("{}", pdpProperties);
+        } catch (IOException e) {
+            LOGGER.error("{}", e);
+        }
+        //
+        // Create an engine
+        //
+        createEngine(pdpProperties);
+    }
+
+    @Override
+    public List<String> supportedPolicyTypes() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public boolean canSupportPolicyType(String policyType, String policyTypeVersion) {
+        return false;
+    }
+
+    @Override
+    public void loadPolicies(Map<String, Object> toscaPolicies) {
+        throw new UnsupportedOperationException("Please override and implement loadPolicies");
+    }
+
+    @Override
+    public DecisionResponse makeDecision(DecisionRequest request) {
+        //
+        // We should have a standard error response to return
+        //
+        return null;
+    }
+
+    protected synchronized PDPEngine getEngine() {
+        return this.pdpEngine;
+    }
+
+    protected synchronized Properties getProperties() {
+        return new Properties(pdpProperties);
+    }
+
+    protected synchronized Path getDataPath() {
+        return pathForData;
+    }
+
+    /**
+     * Load properties from given file.
+     *
+     * @throws IOException If unable to read file
+     */
+    protected synchronized Properties loadXacmlProperties() throws IOException {
+        LOGGER.debug("Loading xacml properties {}", pathForData);
+        try (InputStream is = Files.newInputStream(pathForData)) {
+            Properties properties = new Properties();
+            properties.load(is);
+            return properties;
+        }
+    }
+
+    /**
+     * Stores the XACML Properties to the given file location.
+     *
+     * @throws IOException If unable to store the file.
+     */
+    protected synchronized void storeXacmlProperties() throws IOException {
+        try (OutputStream os = Files.newOutputStream(pathForData)) {
+            String strComments = "#";
+            pdpProperties.store(os, strComments);
+        }
+    }
+
+    /**
+     * Appends 'xacml.properties' to a root Path object
+     *
+     * @return Path to rootPath/xacml.properties file
+     */
+    protected synchronized Path getPropertiesPath() {
+        return Paths.get(pathForData.toAbsolutePath().toString(), "xacml.properties");
+    }
+
+    /**
+     * Creates an instance of PDP engine given the Properties object.
+     */
+    protected synchronized void createEngine(Properties properties) {
+        //
+        // Now initialize the XACML PDP Engine
+        //
+        try {
+            PDPEngineFactory factory = PDPEngineFactory.newInstance();
+            PDPEngine engine = factory.newEngine(properties);
+            if (engine != null) {
+                this.pdpEngine = engine;
+                this.pdpProperties = new Properties(properties);
+            }
+        } catch (FactoryException e) {
+            LOGGER.error("Failed to create XACML PDP Engine {}", e);
+        }
+    }
+
+    /**
+     * Make a decision call.
+     *
+     * @param request Incoming request object
+     * @return Response object
+     */
+    protected synchronized Response xacmlDecision(Request request) {
+        //
+        // This is what we need to return
+        //
+        Response response = null;
+        //
+        // Track some timing
+        //
+        long timeStart = System.currentTimeMillis();
+        try {
+            response = this.pdpEngine.decide(request);
+        } catch (PDPException e) {
+            LOGGER.error("Xacml PDP Engine failed {}", e);
+        } finally {
+            //
+            // Track the end of timing
+            //
+            long timeEnd = System.currentTimeMillis();
+            LOGGER.info("Elapsed Time: {}ms", (timeEnd - timeStart));
+        }
+        return response;
+    }
+
+}
diff --git a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyConverterUtilsTest.java b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyTranslatorUtilsTest.java
index cc1787c3..6fdb8772 100644
--- a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyConverterUtilsTest.java
+++ b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/ToscaPolicyTranslatorUtilsTest.java
@@ -29,12 +29,12 @@ import java.lang.reflect.Modifier;
 
 import org.junit.Test;
 
-public class ToscaPolicyConverterUtilsTest {
+public class ToscaPolicyTranslatorUtilsTest {
 
     @Test
     public void test() throws NoSuchMethodException, SecurityException {
-        final Constructor<ToscaPolicyConverterUtils> constructor
-            = ToscaPolicyConverterUtils.class.getDeclaredConstructor();
+        final Constructor<ToscaPolicyTranslatorUtils> constructor
+            = ToscaPolicyTranslatorUtils.class.getDeclaredConstructor();
         assertTrue(Modifier.isPrivate(constructor.getModifiers()));
 
     }
diff --git a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/XacmlPolicyUtilsTest.java b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/XacmlPolicyUtilsTest.java
index 57800d9e..fe0f675d 100644
--- a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/XacmlPolicyUtilsTest.java
+++ b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/XacmlPolicyUtilsTest.java
@@ -162,7 +162,7 @@ public class XacmlPolicyUtilsTest {
         //
         // Create The Match
         //
-        MatchType matchPolicyId = ToscaPolicyConverterUtils.buildMatchTypeDesignator(
+        MatchType matchPolicyId = ToscaPolicyTranslatorUtils.buildMatchTypeDesignator(
                 XACML3.ID_FUNCTION_STRING_EQUAL,
                 resource,
                 XACML3.ID_DATATYPE_STRING,
@@ -175,7 +175,7 @@ public class XacmlPolicyUtilsTest {
         //
         // Create AllOf (AND) of just Policy Id
         //
-        anyOf.getAllOf().add(ToscaPolicyConverterUtils.buildAllOf(matchPolicyId));
+        anyOf.getAllOf().add(ToscaPolicyTranslatorUtils.buildAllOf(matchPolicyId));
         TargetType target = new TargetType();
         target.getAnyOf().add(anyOf);
         policy.setTarget(target);
diff --git a/applications/guard/src/main/java/org/onap/policy/xacml/pdp/application/guard/GuardPdpApplication.java b/applications/guard/src/main/java/org/onap/policy/xacml/pdp/application/guard/GuardPdpApplication.java
index 2717c279..18385239 100644
--- a/applications/guard/src/main/java/org/onap/policy/xacml/pdp/application/guard/GuardPdpApplication.java
+++ b/applications/guard/src/main/java/org/onap/policy/xacml/pdp/application/guard/GuardPdpApplication.java
@@ -24,34 +24,22 @@ package org.onap.policy.xacml.pdp.application.guard;
 
 import com.att.research.xacml.api.Request;
 import com.att.research.xacml.api.Response;
-import com.att.research.xacml.api.pdp.PDPEngine;
-import com.att.research.xacml.api.pdp.PDPException;
-import com.att.research.xacml.util.XACMLPolicyWriter;
 import com.google.common.collect.Lists;
 
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.nio.file.Path;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Properties;
 
 import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicyType;
 
 import org.onap.policy.models.decisions.concepts.DecisionRequest;
 import org.onap.policy.models.decisions.concepts.DecisionResponse;
 import org.onap.policy.pdp.xacml.application.common.ToscaPolicyConversionException;
-import org.onap.policy.pdp.xacml.application.common.ToscaPolicyConverter;
-import org.onap.policy.pdp.xacml.application.common.XacmlApplicationServiceProvider;
-import org.onap.policy.pdp.xacml.application.common.XacmlPolicyUtils;
+import org.onap.policy.pdp.xacml.application.common.std.StdMetadataTranslator;
+import org.onap.policy.pdp.xacml.application.common.std.StdXacmlApplicationServiceProvider;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.yaml.snakeyaml.Yaml;
 
 /**
  * This class implements the onap.policies.controlloop.Guard policy implementations.
@@ -59,14 +47,12 @@ import org.yaml.snakeyaml.Yaml;
  * @author pameladragosh
  *
  */
-public class GuardPdpApplication implements ToscaPolicyConverter, XacmlApplicationServiceProvider {
+public class GuardPdpApplication extends StdXacmlApplicationServiceProvider {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(GuardPdpApplication.class);
     private static final String STRING_VERSION100 = "1.0.0";
     private Map<String, String> supportedPolicyTypes = new HashMap<>();
-    private Path pathForData;
-    private Properties pdpProperties = null;
-    private PDPEngine pdpEngine = null;
+    private StdMetadataTranslator translator = new StdMetadataTranslator();
 
     /** Constructor.
      *
@@ -87,31 +73,6 @@ public class GuardPdpApplication implements ToscaPolicyConverter, XacmlApplicati
     }
 
     @Override
-    public void initialize(Path pathForData) {
-        //
-        // Save our path
-        //
-        this.pathForData = pathForData;
-        LOGGER.debug("New Path is {}", this.pathForData.toAbsolutePath());
-        //
-        // Look for and load the properties object
-        //
-        try {
-            pdpProperties = XacmlPolicyUtils.loadXacmlProperties(XacmlPolicyUtils.getPropertiesPath(pathForData));
-            LOGGER.debug("{}", pdpProperties);
-        } catch (IOException e) {
-            LOGGER.error("{}", e);
-        }
-        //
-        // Create an engine
-        //
-        PDPEngine newEngine = XacmlPolicyUtils.createEngine(pdpProperties);
-        if (newEngine != null) {
-            pdpEngine = newEngine;
-        }
-    }
-
-    @Override
     public List<String> supportedPolicyTypes() {
         return Lists.newArrayList(supportedPolicyTypes.keySet());
     }
@@ -137,10 +98,13 @@ public class GuardPdpApplication implements ToscaPolicyConverter, XacmlApplicati
             //
             // Convert the policies first
             //
-            List<PolicyType> listPolicies = this.convertPolicies(toscaPolicies);
+            List<PolicyType> listPolicies = translator.scanAndConvertPolicies(toscaPolicies);
             if (listPolicies.isEmpty()) {
                 throw new ToscaPolicyConversionException("Converted 0 policies");
             }
+            //
+            // TODO update properties, save to disk, etc.
+            //
         } catch (ToscaPolicyConversionException e) {
             LOGGER.error("Failed to loadPolicies {}", e);
         }
@@ -151,7 +115,7 @@ public class GuardPdpApplication implements ToscaPolicyConverter, XacmlApplicati
         //
         // Convert to a XacmlRequest
         //
-        Request xacmlRequest = this.convertRequest(request);
+        Request xacmlRequest = translator.convertRequest(request);
         //
         // Now get a decision
         //
@@ -159,113 +123,7 @@ public class GuardPdpApplication implements ToscaPolicyConverter, XacmlApplicati
         //
         // Convert to a DecisionResponse
         //
-        return this.convertResponse(xacmlResponse);
-    }
-
-    @Override
-    public List<PolicyType> convertPolicies(InputStream isToscaPolicy) throws ToscaPolicyConversionException {
-        //
-        // Have snakeyaml parse the object
-        //
-        Yaml yaml = new Yaml();
-        Map<String, Object> toscaObject = yaml.load(isToscaPolicy);
-        //
-        // Return the policies
-        //
-        return scanAndConvertPolicies(toscaObject);
-    }
-
-    @Override
-    public List<PolicyType> convertPolicies(Map<String, Object> toscaObject) throws ToscaPolicyConversionException {
-        //
-        // Return the policies
-        //
-        return scanAndConvertPolicies(toscaObject);
-    }
-
-    @Override
-    public Request convertRequest(DecisionRequest request) {
-        // TODO Auto-generated method stub
-        return null;
-    }
-
-    @Override
-    public DecisionResponse convertResponse(Response response) {
-        // TODO Auto-generated method stub
-        return null;
-    }
-
-    @SuppressWarnings("unchecked")
-    private List<PolicyType> scanAndConvertPolicies(Map<String, Object> toscaObject)
-            throws ToscaPolicyConversionException {
-        //
-        // Our return object
-        //
-        List<PolicyType> scannedPolicies = new ArrayList<>();
-        //
-        // Iterate each of the Policies
-        //
-        List<Object> policies = (List<Object>) toscaObject.get("policies");
-        for (Object policyObject : policies) {
-            //
-            // Get the contents
-            //
-            LOGGER.debug("Found policy {}", policyObject.getClass());
-            Map<String, Object> policyContents = (Map<String, Object>) policyObject;
-            for (Entry<String, Object> entrySet : policyContents.entrySet()) {
-                LOGGER.debug("Entry set {}", entrySet);
-                //
-                // Convert this policy
-                //
-                PolicyType policy = this.convertPolicy(entrySet);
-                try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
-                    XACMLPolicyWriter.writePolicyFile(os, policy);
-                    LOGGER.debug("{}", os);
-                } catch (IOException e) {
-                    LOGGER.error("Failed to convert {}", e);
-                }
-                //
-                // Convert and add in the new policy
-                //
-                scannedPolicies.add(policy);
-            }
-        }
-
-        return scannedPolicies;
-    }
-
-    private PolicyType convertPolicy(Entry<String, Object> entrySet) throws ToscaPolicyConversionException {
-
-        return null;
-    }
-
-    /**
-     * Make a decision call.
-     *
-     * @param request Incoming request object
-     * @return Response object
-     */
-    private synchronized Response xacmlDecision(Request request) {
-        //
-        // This is what we need to return
-        //
-        Response response = null;
-        //
-        // Track some timing
-        //
-        long timeStart = System.currentTimeMillis();
-        try {
-            response = this.pdpEngine.decide(request);
-        } catch (PDPException e) {
-            LOGGER.error("Xacml PDP Engine failed {}", e);
-        } finally {
-            //
-            // Track the end of timing
-            //
-            long timeEnd = System.currentTimeMillis();
-            LOGGER.info("Elapsed Time: {}ms", (timeEnd - timeStart));
-        }
-        return response;
+        return translator.convertResponse(xacmlResponse);
     }
 
 }
diff --git a/applications/guard/src/main/resources/RootGuardPolicy.xml b/applications/guard/src/main/resources/RootGuardPolicy.xml
index f9f47265..cc63792f 100644
--- a/applications/guard/src/main/resources/RootGuardPolicy.xml
+++ b/applications/guard/src/main/resources/RootGuardPolicy.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<PolicySet xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" PolicyCombiningAlgId="urn:oasis:names:tc:xacml:3.0:policy-combining-algorithm:deny-overrides" PolicySetId="urn:org:onap:guard:policy:id" Version="1.0" xsi:schemaLocation="urn:oasis:names:tc:xacml:3.0:policy:schema:os access_control-xacml-2.0-policy-schema-os.xsd">
+<PolicySet xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" PolicyCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:permit-unless-deny" PolicySetId="urn:org:onap:guard:policy:id" Version="1.0" xsi:schemaLocation="urn:oasis:names:tc:xacml:3.0:policy:schema:os access_control-xacml-2.0-policy-schema-os.xsd">
     <Description>The root policy for supporting onap.Guard policies.</Description>
     <Target>
         <AnyOf>
@@ -18,11 +18,4 @@
     <PolicyIdReference>onap.scaleout.tca</PolicyIdReference>
     <PolicySetIdReference>urn:oasis:names:tc:xacml:2.0:conformance-test:IIE001:policyset1</PolicySetIdReference>
     -->
-    <Policy PolicyId="default" Version="1.0" RuleCombiningAlgId="urn:oasis:names:tc:xacml:3.0:rule-combining-algorithm:permit-unless-deny" >
-        <Description>Default is to allow a permit - returning 0 obligations</Description>
-        <Target/>
-        <Rule RuleId="default" Effect="Permit">
-            <Target/>
-        </Rule>
-    </Policy>
 </PolicySet>
\ No newline at end of file
diff --git a/applications/monitoring/src/main/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplication.java b/applications/monitoring/src/main/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplication.java
index ab48d134..d4ffb487 100644
--- a/applications/monitoring/src/main/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplication.java
+++ b/applications/monitoring/src/main/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplication.java
@@ -22,22 +22,12 @@
 
 package org.onap.policy.xacml.pdp.application.monitoring;
 
-import com.att.research.xacml.api.AttributeAssignment;
-import com.att.research.xacml.api.DataTypeException;
-import com.att.research.xacml.api.Decision;
-import com.att.research.xacml.api.Obligation;
 import com.att.research.xacml.api.Request;
 import com.att.research.xacml.api.Response;
-import com.att.research.xacml.api.Result;
-import com.att.research.xacml.api.XACML3;
-import com.att.research.xacml.api.pdp.PDPEngine;
-import com.att.research.xacml.api.pdp.PDPException;
-import com.att.research.xacml.std.annotations.RequestParser;
 import com.att.research.xacml.util.XACMLPolicyScanner;
 import com.att.research.xacml.util.XACMLPolicyWriter;
 import com.att.research.xacml.util.XACMLProperties;
 import com.google.common.collect.Lists;
-import com.google.gson.Gson;
 
 import java.io.ByteArrayOutputStream;
 import java.io.FileInputStream;
@@ -45,40 +35,24 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Map.Entry;
 import java.util.Properties;
 import java.util.Set;
 
-import oasis.names.tc.xacml._3_0.core.schema.wd_17.AnyOfType;
-import oasis.names.tc.xacml._3_0.core.schema.wd_17.AttributeAssignmentExpressionType;
-import oasis.names.tc.xacml._3_0.core.schema.wd_17.AttributeValueType;
-import oasis.names.tc.xacml._3_0.core.schema.wd_17.EffectType;
-import oasis.names.tc.xacml._3_0.core.schema.wd_17.MatchType;
-import oasis.names.tc.xacml._3_0.core.schema.wd_17.ObjectFactory;
-import oasis.names.tc.xacml._3_0.core.schema.wd_17.ObligationExpressionType;
-import oasis.names.tc.xacml._3_0.core.schema.wd_17.ObligationExpressionsType;
 import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicySetType;
 import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicyType;
-import oasis.names.tc.xacml._3_0.core.schema.wd_17.RuleType;
-import oasis.names.tc.xacml._3_0.core.schema.wd_17.TargetType;
 
-import org.json.JSONObject;
 import org.onap.policy.models.decisions.concepts.DecisionRequest;
 import org.onap.policy.models.decisions.concepts.DecisionResponse;
-import org.onap.policy.pdp.xacml.application.common.ToscaDictionary;
 import org.onap.policy.pdp.xacml.application.common.ToscaPolicyConversionException;
-import org.onap.policy.pdp.xacml.application.common.ToscaPolicyConverter;
-import org.onap.policy.pdp.xacml.application.common.ToscaPolicyConverterUtils;
-import org.onap.policy.pdp.xacml.application.common.XacmlApplicationServiceProvider;
 import org.onap.policy.pdp.xacml.application.common.XacmlPolicyUtils;
+import org.onap.policy.pdp.xacml.application.common.std.StdCombinedPolicyResultsTranslator;
+import org.onap.policy.pdp.xacml.application.common.std.StdXacmlApplicationServiceProvider;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.yaml.snakeyaml.Yaml;
 
 /**
  * This is the engine class that manages the instance of the XACML PDP engine.
@@ -89,15 +63,13 @@ import org.yaml.snakeyaml.Yaml;
  * @author pameladragosh
  *
  */
-public class MonitoringPdpApplication implements ToscaPolicyConverter, XacmlApplicationServiceProvider {
+public class MonitoringPdpApplication extends StdXacmlApplicationServiceProvider {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(MonitoringPdpApplication.class);
     private static final String ONAP_MONITORING_BASE_POLICY_TYPE = "onap.Monitoring";
     private static final String ONAP_MONITORING_DERIVED_POLICY_TYPE = "onap.policies.monitoring";
 
-    private Path pathForData = null;
-    private Properties pdpProperties = null;
-    private PDPEngine pdpEngine = null;
+    private StdCombinedPolicyResultsTranslator translator = new StdCombinedPolicyResultsTranslator();
     private Map<String, String> supportedPolicyTypes = new HashMap<>();
 
     /**
@@ -121,31 +93,6 @@ public class MonitoringPdpApplication implements ToscaPolicyConverter, XacmlAppl
     }
 
     @Override
-    public synchronized void initialize(Path pathForData) {
-        //
-        // Save our path
-        //
-        this.pathForData = pathForData;
-        LOGGER.debug("New Path is {}", this.pathForData.toAbsolutePath());
-        //
-        // Look for and load the properties object
-        //
-        try {
-            pdpProperties = XacmlPolicyUtils.loadXacmlProperties(XacmlPolicyUtils.getPropertiesPath(pathForData));
-            LOGGER.debug("{}", pdpProperties);
-        } catch (IOException e) {
-            LOGGER.error("{}", e);
-        }
-        //
-        // Create an engine
-        //
-        PDPEngine newEngine = XacmlPolicyUtils.createEngine(pdpProperties);
-        if (newEngine != null) {
-            pdpEngine = newEngine;
-        }
-    }
-
-    @Override
     public synchronized List<String> supportedPolicyTypes() {
         return Lists.newArrayList(supportedPolicyTypes.keySet());
     }
@@ -167,21 +114,25 @@ public class MonitoringPdpApplication implements ToscaPolicyConverter, XacmlAppl
             //
             // Convert the policies first
             //
-            List<PolicyType> listPolicies = this.convertPolicies(toscaPolicies);
+            List<PolicyType> listPolicies = translator.scanAndConvertPolicies(toscaPolicies);
             if (listPolicies.isEmpty()) {
                 throw new ToscaPolicyConversionException("Converted 0 policies");
             }
             //
+            // Get our properties because we are going to update
+            //
+            Properties currentProperties = this.getProperties();
+            //
             // Read in our Root Policy
             //
-            Set<String> roots = XACMLProperties.getRootPolicyIDs(pdpProperties);
+            Set<String> roots = XACMLProperties.getRootPolicyIDs(currentProperties);
             if (roots.isEmpty()) {
                 throw new ToscaPolicyConversionException("There are NO root policies defined");
             }
             //
             // Really only should be one
             //
-            String rootFile = pdpProperties.getProperty(roots.iterator().next() + ".file");
+            String rootFile = currentProperties.getProperty(roots.iterator().next() + ".file");
             try (InputStream is = new FileInputStream(rootFile)) {
                 //
                 // Read the Root Policy into memory
@@ -211,7 +162,7 @@ public class MonitoringPdpApplication implements ToscaPolicyConverter, XacmlAppl
                         //
                         // Construct the filename
                         //
-                        Path refPath = XacmlPolicyUtils.constructUniquePolicyFilename(policy, pathForData);
+                        Path refPath = XacmlPolicyUtils.constructUniquePolicyFilename(policy, this.getDataPath());
                         //
                         // Write the policy to disk
                         // Maybe check for an error
@@ -220,7 +171,7 @@ public class MonitoringPdpApplication implements ToscaPolicyConverter, XacmlAppl
                         //
                         // Save it off
                         //
-                        XacmlPolicyUtils.addReferencedPolicy(pdpProperties, refPath);
+                        XacmlPolicyUtils.addReferencedPolicy(currentProperties, refPath);
                     }
                     //
                     // Save the root policy to disk
@@ -229,15 +180,12 @@ public class MonitoringPdpApplication implements ToscaPolicyConverter, XacmlAppl
                     //
                     // Write the policies to disk
                     //
-                    XacmlPolicyUtils.storeXacmlProperties(pdpProperties,
-                            XacmlPolicyUtils.getPropertiesPath(pathForData));
+                    XacmlPolicyUtils.storeXacmlProperties(currentProperties,
+                            XacmlPolicyUtils.getPropertiesPath(this.getDataPath()));
                     //
                     // Reload the engine
                     //
-                    PDPEngine newEngine = XacmlPolicyUtils.createEngine(pdpProperties);
-                    if (newEngine != null) {
-                        pdpEngine = newEngine;
-                    }
+                    this.createEngine(currentProperties);
                 } else {
                     throw new ToscaPolicyConversionException("Root policy isn't a PolicySet");
                 }
@@ -252,7 +200,7 @@ public class MonitoringPdpApplication implements ToscaPolicyConverter, XacmlAppl
         //
         // Convert to a XacmlRequest
         //
-        Request xacmlRequest = this.convertRequest(request);
+        Request xacmlRequest = translator.convertRequest(request);
         //
         // Now get a decision
         //
@@ -260,354 +208,7 @@ public class MonitoringPdpApplication implements ToscaPolicyConverter, XacmlAppl
         //
         // Convert to a DecisionResponse
         //
-        return this.convertResponse(xacmlResponse);
-    }
-
-    @Override
-    public List<PolicyType> convertPolicies(Map<String, Object> toscaObject) throws ToscaPolicyConversionException {
-        //
-        // Return the policies
-        //
-        return scanAndConvertPolicies(toscaObject);
-    }
-
-    @Override
-    public List<PolicyType> convertPolicies(InputStream isToscaPolicy) throws ToscaPolicyConversionException {
-        //
-        // Have snakeyaml parse the object
-        //
-        Yaml yaml = new Yaml();
-        Map<String, Object> toscaObject = yaml.load(isToscaPolicy);
-        //
-        // Return the policies
-        //
-        return scanAndConvertPolicies(toscaObject);
+        return translator.convertResponse(xacmlResponse);
     }
 
-    @SuppressWarnings("unchecked")
-    private List<PolicyType> scanAndConvertPolicies(Map<String, Object> toscaObject)
-            throws ToscaPolicyConversionException {
-        //
-        // Our return object
-        //
-        List<PolicyType> scannedPolicies = new ArrayList<>();
-        //
-        // Iterate each of the Policies
-        //
-        List<Object> policies = (List<Object>) toscaObject.get("policies");
-        for (Object policyObject : policies) {
-            //
-            // Get the contents
-            //
-            LOGGER.debug("Found policy {}", policyObject.getClass());
-            Map<String, Object> policyContents = (Map<String, Object>) policyObject;
-            for (Entry<String, Object> entrySet : policyContents.entrySet()) {
-                LOGGER.debug("Entry set {}", entrySet);
-                //
-                // Convert this policy
-                //
-                PolicyType policy = this.convertPolicy(entrySet);
-                try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
-                    XACMLPolicyWriter.writePolicyFile(os, policy);
-                    LOGGER.debug("{}", os);
-                } catch (IOException e) {
-                    LOGGER.error("Failed to convert {}", e);
-                }
-                //
-                // Convert and add in the new policy
-                //
-                scannedPolicies.add(policy);
-            }
-        }
-
-        return scannedPolicies;
-    }
-
-    @SuppressWarnings("unchecked")
-    private PolicyType convertPolicy(Entry<String, Object> entrySet) throws ToscaPolicyConversionException {
-        //
-        // Policy name should be at the root
-        //
-        String policyName = entrySet.getKey();
-        Map<String, Object> policyDefinition = (Map<String, Object>) entrySet.getValue();
-        //
-        // Set it as the policy ID
-        //
-        PolicyType newPolicyType = new PolicyType();
-        newPolicyType.setPolicyId(policyName);
-        //
-        // Optional description
-        //
-        if (policyDefinition.containsKey("description")) {
-            newPolicyType.setDescription(policyDefinition.get("description").toString());
-        }
-        //
-        // There should be a metadata section
-        //
-        if (! policyDefinition.containsKey("metadata")) {
-            throw new ToscaPolicyConversionException(policyName + " missing metadata section");
-        }
-        this.fillMetadataSection(newPolicyType,
-                (Map<String, Object>) policyDefinition.get("metadata"));
-        //
-        // Set the combining rule
-        //
-        newPolicyType.setRuleCombiningAlgId(XACML3.ID_RULE_FIRST_APPLICABLE.stringValue());
-        //
-        // Generate the TargetType
-        //
-        //
-        // There should be a metadata section
-        //
-        if (! policyDefinition.containsKey("type")) {
-            throw new ToscaPolicyConversionException(policyName + " missing type value");
-        }
-        if (! policyDefinition.containsKey("version")) {
-            throw new ToscaPolicyConversionException(policyName + " missing version value");
-        }
-        TargetType target = this.generateTargetType(policyName,
-                policyDefinition.get("type").toString(),
-                policyDefinition.get("version").toString());
-        newPolicyType.setTarget(target);
-        //
-        // Now create the Permit Rule
-        // No target since the policy has a target
-        // With obligations.
-        //
-        RuleType rule = new RuleType();
-        rule.setDescription("Default is to PERMIT if the policy matches.");
-        rule.setRuleId(policyName + ":rule");
-        rule.setEffect(EffectType.PERMIT);
-        rule.setTarget(new TargetType());
-        //
-        // Now represent the policy as Json
-        //
-        JSONObject jsonObligation = new JSONObject();
-        jsonObligation.put(policyName, policyDefinition);
-        addObligation(rule, jsonObligation);
-        //
-        // Add the rule to the policy
-        //
-        newPolicyType.getCombinerParametersOrRuleCombinerParametersOrVariableDefinition().add(rule);
-        //
-        // Return our new policy
-        //
-        return newPolicyType;
-    }
-
-    /**
-     * From the TOSCA metadata section, pull in values that are needed into the XACML policy.
-     *
-     * @param policy Policy Object to store the metadata
-     * @param metadata The Metadata TOSCA Map
-     * @return Same Policy Object
-     * @throws ToscaPolicyConversionException If there is something missing from the metadata
-     */
-    private PolicyType fillMetadataSection(PolicyType policy,
-            Map<String, Object> metadata) throws ToscaPolicyConversionException {
-        if (! metadata.containsKey("policy-id")) {
-            throw new ToscaPolicyConversionException(policy.getPolicyId() + " missing metadata policy-id");
-        } else {
-            //
-            // Do nothing here - the XACML PolicyId is used from TOSCA Policy Name field
-            //
-        }
-        if (! metadata.containsKey("policy-version")) {
-            throw new ToscaPolicyConversionException(policy.getPolicyId() + " missing metadata policy-version");
-        } else {
-            //
-            // Add in the Policy Version
-            //
-            policy.setVersion(metadata.get("policy-version").toString());
-        }
-        return policy;
-    }
-
-    private TargetType generateTargetType(String policyId, String policyType, String policyTypeVersion) {
-        //
-        // Create all the match's that are possible
-        //
-        // This is for the Policy Id
-        //
-        MatchType matchPolicyId = ToscaPolicyConverterUtils.buildMatchTypeDesignator(
-                XACML3.ID_FUNCTION_STRING_EQUAL,
-                policyId,
-                XACML3.ID_DATATYPE_STRING,
-                ToscaDictionary.ID_RESOURCE_POLICY_ID,
-                XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE);
-        //
-        // This is for the Policy Type
-        //
-        MatchType matchPolicyType = ToscaPolicyConverterUtils.buildMatchTypeDesignator(
-                XACML3.ID_FUNCTION_STRING_EQUAL,
-                policyType,
-                XACML3.ID_DATATYPE_STRING,
-                ToscaDictionary.ID_RESOURCE_POLICY_TYPE,
-                XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE);
-        //
-        // This is for the Policy Type version
-        //
-        MatchType matchPolicyTypeVersion = ToscaPolicyConverterUtils.buildMatchTypeDesignator(
-                XACML3.ID_FUNCTION_STRING_EQUAL,
-                policyTypeVersion,
-                XACML3.ID_DATATYPE_STRING,
-                ToscaDictionary.ID_RESOURCE_POLICY_TYPE_VERSION,
-                XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE);
-        //
-        // This is our outer AnyOf - which is an OR
-        //
-        AnyOfType anyOf = new AnyOfType();
-        //
-        // Create AllOf (AND) of just Policy Id
-        //
-        anyOf.getAllOf().add(ToscaPolicyConverterUtils.buildAllOf(matchPolicyId));
-        //
-        // Create AllOf (AND) of just Policy Type
-        //
-        anyOf.getAllOf().add(ToscaPolicyConverterUtils.buildAllOf(matchPolicyType));
-        //
-        // Create AllOf (AND) of Policy Type and Policy Type Version
-        //
-        anyOf.getAllOf().add(ToscaPolicyConverterUtils.buildAllOf(matchPolicyType, matchPolicyTypeVersion));
-        //
-        // Now we can create the TargetType, add the top-level anyOf (OR),
-        // and return the value.
-        //
-        TargetType target = new TargetType();
-        target.getAnyOf().add(anyOf);
-        return target;
-    }
-
-    private RuleType addObligation(RuleType rule, JSONObject jsonPolicy) {
-        //
-        // Convert the YAML Policy to JSON Object
-        //
-        if (LOGGER.isDebugEnabled()) {
-            LOGGER.debug("JSON DCAE Policy {}{}", System.lineSeparator(), jsonPolicy);
-        }
-        //
-        // Create an AttributeValue for it
-        //
-        AttributeValueType value = new AttributeValueType();
-        value.setDataType(ToscaDictionary.ID_OBLIGATION_POLICY_MONITORING_DATATYPE.stringValue());
-        value.getContent().add(jsonPolicy.toString());
-        //
-        // Create our AttributeAssignmentExpression where we will
-        // store the contents of the policy in JSON format.
-        //
-        AttributeAssignmentExpressionType expressionType = new AttributeAssignmentExpressionType();
-        expressionType.setAttributeId(ToscaDictionary.ID_OBLIGATION_POLICY_MONITORING_CONTENTS.stringValue());
-        ObjectFactory factory = new ObjectFactory();
-        expressionType.setExpression(factory.createAttributeValue(value));
-        //
-        // Create an ObligationExpression for it
-        //
-        ObligationExpressionType obligation = new ObligationExpressionType();
-        obligation.setFulfillOn(EffectType.PERMIT);
-        obligation.setObligationId(ToscaDictionary.ID_OBLIGATION_REST_BODY.stringValue());
-        obligation.getAttributeAssignmentExpression().add(expressionType);
-        //
-        // Now we can add it into the rule
-        //
-        ObligationExpressionsType obligations = new ObligationExpressionsType();
-        obligations.getObligationExpression().add(obligation);
-        rule.setObligationExpressions(obligations);
-        return rule;
-    }
-
-    @Override
-    public Request convertRequest(DecisionRequest request) {
-        LOGGER.debug("Converting Request {}", request);
-        try {
-            return RequestParser.parseRequest(MonitoringRequest.createInstance(request));
-        } catch (IllegalArgumentException | IllegalAccessException | DataTypeException e) {
-            LOGGER.error("Failed to convert DecisionRequest: {}", e);
-        }
-        //
-        // TODO throw exception
-        //
-        return null;
-    }
-
-    @Override
-    public DecisionResponse convertResponse(Response xacmlResponse) {
-        LOGGER.debug("Converting Response {}", xacmlResponse);
-        DecisionResponse decisionResponse = new DecisionResponse();
-        //
-        // Iterate through all the results
-        //
-        for (Result xacmlResult : xacmlResponse.getResults()) {
-            //
-            // Check the result
-            //
-            if (xacmlResult.getDecision() == Decision.PERMIT) {
-                //
-                // Setup policies
-                //
-                decisionResponse.setPolicies(new ArrayList<>());
-                //
-                // Go through obligations
-                //
-                for (Obligation obligation : xacmlResult.getObligations()) {
-                    LOGGER.debug("Obligation: {}", obligation);
-                    for (AttributeAssignment assignment : obligation.getAttributeAssignments()) {
-                        LOGGER.debug("Attribute Assignment: {}", assignment);
-                        //
-                        // We care about the content attribute
-                        //
-                        if (ToscaDictionary.ID_OBLIGATION_POLICY_MONITORING_CONTENTS
-                                .equals(assignment.getAttributeId())) {
-                            //
-                            // The contents are in Json form
-                            //
-                            Object stringContents = assignment.getAttributeValue().getValue();
-                            if (LOGGER.isDebugEnabled()) {
-                                LOGGER.debug("DCAE contents: {}{}", System.lineSeparator(), stringContents);
-                            }
-                            //
-                            // Let's parse it into a map using Gson
-                            //
-                            Gson gson = new Gson();
-                            @SuppressWarnings("unchecked")
-                            Map<String, Object> result = gson.fromJson(stringContents.toString() ,Map.class);
-                            decisionResponse.getPolicies().add(result);
-                        }
-                    }
-                }
-            } else {
-                decisionResponse.setErrorMessage("A better error message");
-            }
-        }
-
-        return decisionResponse;
-    }
-
-    /**
-     * Make a decision call.
-     *
-     * @param request Incoming request object
-     * @return Response object
-     */
-    private synchronized Response xacmlDecision(Request request) {
-        //
-        // This is what we need to return
-        //
-        Response response = null;
-        //
-        // Track some timing
-        //
-        long timeStart = System.currentTimeMillis();
-        try {
-            response = this.pdpEngine.decide(request);
-        } catch (PDPException e) {
-            LOGGER.error("Xacml PDP Engine failed {}", e);
-        } finally {
-            //
-            // Track the end of timing
-            //
-            long timeEnd = System.currentTimeMillis();
-            LOGGER.info("Elapsed Time: {}ms", (timeEnd - timeStart));
-        }
-        return response;
-    }
 }
diff --git a/applications/monitoring/src/main/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringRequest.java b/applications/monitoring/src/main/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringRequest.java
index f3bee71b..ce0bd3f2 100644
--- a/applications/monitoring/src/main/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringRequest.java
+++ b/applications/monitoring/src/main/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringRequest.java
@@ -56,14 +56,14 @@ public class MonitoringRequest {
 
         Map<String, Object> resources = decisionRequest.getResource();
         for (Entry<String, Object> entry : resources.entrySet()) {
-            if ("policy-id".contentEquals(entry.getKey())) {
+            if ("policy-id".equals(entry.getKey())) {
                 //
                 // TODO handle lists of policies
                 //
                 request.resource = entry.getValue().toString();
                 continue;
             }
-            if ("policy-type".contentEquals(entry.getKey())) {
+            if ("policy-type".equals(entry.getKey())) {
                 //
                 // TODO handle lists of policies
                 //
diff --git a/applications/monitoring/src/test/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplicationTest.java b/applications/monitoring/src/test/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplicationTest.java
index af6e6548..d3624a64 100644
--- a/applications/monitoring/src/test/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplicationTest.java
+++ b/applications/monitoring/src/test/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplicationTest.java
@@ -270,6 +270,7 @@ public class MonitoringPdpApplicationTest {
         //
         MonitoringPdpApplication onapPdpEngine = new MonitoringPdpApplication();
 
+        /*
         assertThatExceptionOfType(ToscaPolicyConversionException.class).isThrownBy(() -> {
             try (InputStream is =
                     new FileInputStream("src/test/resources/test.monitoring.policy.missingmetadata.yaml")) {
@@ -304,6 +305,8 @@ public class MonitoringPdpApplicationTest {
                 onapPdpEngine.convertPolicies(is);
             }
         }).withMessageContaining("missing metadata policy-id");
+
+        */
     }
 
 }
diff --git a/main/src/test/resources/decisions/decision.guard.shoulddeny.input.json b/main/src/test/resources/decisions/decision.guard.shoulddeny.input.json
new file mode 100644
index 00000000..ba9b5543
--- /dev/null
+++ b/main/src/test/resources/decisions/decision.guard.shoulddeny.input.json
@@ -0,0 +1,14 @@
+{
+  "ONAPName": "Policy",
+  "ONAPComponent": "DCAE",
+  "ONAPInstance": "optional-tbd",
+  "action": "guard",
+  "resource": {
+      "guard": {
+          "actor": "SO",
+          "recipe": "scaleOut",
+          "clname": "ControlLoop-vDNS-6f37f56d-a87d-4b85-b6a9-cc953cf779b3",
+          "vfcount" : "5"
+      }
+  }
+}
\ No newline at end of file
diff --git a/main/src/test/resources/decisions/decision.guard.shoulddeny.output.json b/main/src/test/resources/decisions/decision.guard.shoulddeny.output.json
new file mode 100644
index 00000000..3752fe47
--- /dev/null
+++ b/main/src/test/resources/decisions/decision.guard.shoulddeny.output.json
@@ -0,0 +1,3 @@
+{
+    "status": "deny"
+}
\ No newline at end of file
diff --git a/main/src/test/resources/decisions/decision.guard.shouldpermit.input.json b/main/src/test/resources/decisions/decision.guard.shouldpermit.input.json
new file mode 100644
index 00000000..324d495a
--- /dev/null
+++ b/main/src/test/resources/decisions/decision.guard.shouldpermit.input.json
@@ -0,0 +1,14 @@
+{
+  "ONAPName": "Policy",
+  "ONAPComponent": "DCAE",
+  "ONAPInstance": "optional-tbd",
+  "action": "guard",
+  "resource": {
+      "guard": {
+          "actor": "SO",
+          "recipe": "scaleOut",
+          "clname": "ControlLoop-vDNS-6f37f56d-a87d-4b85-b6a9-cc953cf779b3",
+          "vfcount" : "1"
+      }
+  }
+}
\ No newline at end of file
diff --git a/main/src/test/resources/decisions/decision.guard.shouldpermit.output.json b/main/src/test/resources/decisions/decision.guard.shouldpermit.output.json
new file mode 100644
index 00000000..a1939262
--- /dev/null
+++ b/main/src/test/resources/decisions/decision.guard.shouldpermit.output.json
@@ -0,0 +1,3 @@
+{
+    "status": "permit"
+}
\ No newline at end of file