Merge "Add Legacy Op Policy Persistence"

7 files changed, 414 insertions, 212 deletions

diff --git a/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/concepts/LegacyOperationalPolicy.java b/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/concepts/LegacyOperationalPolicy.java
index 60a1e454d..1db4d6e20 100644
--- a/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/concepts/LegacyOperationalPolicy.java
+++ b/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/concepts/LegacyOperationalPolicy.java
@@ -36,6 +36,7 @@ public class LegacyOperationalPolicy {
     @SerializedName("policy-id")
     private String policyId;
 
+    @SerializedName("policy-version")
     private String policyVersion;
 
     private String content;
diff --git a/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/mapping/LegacyOperationalPolicyMapper.java b/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/mapping/LegacyOperationalPolicyMapper.java
index 2f87020be..65f477572 100644
--- a/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/mapping/LegacyOperationalPolicyMapper.java
+++ b/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/mapping/LegacyOperationalPolicyMapper.java
@@ -23,14 +23,19 @@ package org.onap.policy.models.tosca.legacy.mapping;
 import java.util.HashMap;
 import java.util.Map;
 
+import javax.ws.rs.core.Response;
+
 import org.onap.policy.models.base.PfConceptKey;
-import org.onap.policy.models.base.PfReferenceKey;
+import org.onap.policy.models.base.PfModelRuntimeException;
 import org.onap.policy.models.tosca.legacy.concepts.LegacyOperationalPolicy;
 import org.onap.policy.models.tosca.simple.concepts.ToscaPolicies;
 import org.onap.policy.models.tosca.simple.concepts.ToscaPolicy;
 import org.onap.policy.models.tosca.simple.concepts.ToscaServiceTemplate;
 import org.onap.policy.models.tosca.simple.concepts.ToscaTopologyTemplate;
 import org.onap.policy.models.tosca.simple.mapping.ToscaServiceTemplateMapper;
+import org.onap.policy.models.tosca.utils.ToscaUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * This class maps a legacy operational policy to and from a TOSCA service template.
@@ -39,51 +44,72 @@ import org.onap.policy.models.tosca.simple.mapping.ToscaServiceTemplateMapper;
  */
 public class LegacyOperationalPolicyMapper
         implements ToscaServiceTemplateMapper<LegacyOperationalPolicy, LegacyOperationalPolicy> {
+    private static final Logger LOGGER = LoggerFactory.getLogger(LegacyOperationalPolicyMapper.class);
 
-    // TODO: Do this correctly with an atomic integer
-    private static int nextVersion = 1;
+    private static final PfConceptKey LEGACY_OPERATIONAL_TYPE =
+            new PfConceptKey("onap.policies.controlloop.Operational", "1.0.0");
 
     @Override
-    public ToscaServiceTemplate toToscaServiceTemplate(LegacyOperationalPolicy legacyOperationalPolicy) {
-        PfConceptKey policyKey =
-                new PfConceptKey(legacyOperationalPolicy.getPolicyId(), getNextVersion());
+    public ToscaServiceTemplate toToscaServiceTemplate(final LegacyOperationalPolicy legacyOperationalPolicy) {
+        String incomingVersion = legacyOperationalPolicy.getPolicyVersion();
+        if (incomingVersion == null) {
+            incomingVersion = "1";
+        }
+
+        PfConceptKey policyKey = new PfConceptKey(legacyOperationalPolicy.getPolicyId(), incomingVersion + ".0.0");
 
-        ToscaPolicy toscaPolicy = new ToscaPolicy(policyKey);
+        final ToscaPolicy toscaPolicy = new ToscaPolicy(policyKey);
 
-        // TODO: Find out how to parse the PolicyType from the content
-        // TODO: Check if this is the correct way to set the policy type version
-        toscaPolicy.setType(new PfConceptKey("SomeDerivedPolicyType", "1.0.1"));
+        toscaPolicy.setType(LEGACY_OPERATIONAL_TYPE);
 
-        Map<String, String> propertyMap = new HashMap<>();
+        final Map<String, String> propertyMap = new HashMap<>();
         toscaPolicy.setProperties(propertyMap);
         toscaPolicy.getProperties().put("Content", legacyOperationalPolicy.getContent());
 
-        PfConceptKey serviceTemplateKey = new PfConceptKey("ServiceTemplate", "1.0.2");
-        ToscaServiceTemplate serviceTemplate = new ToscaServiceTemplate(serviceTemplateKey);
+        final ToscaServiceTemplate serviceTemplate = new ToscaServiceTemplate();
         serviceTemplate.setToscaDefinitionsVersion("tosca_simple_yaml_1_0");
 
-        PfReferenceKey topologyTemplateKey = new PfReferenceKey(serviceTemplateKey, "TopolocyTemplate");
-        serviceTemplate.setTopologyTemplate(new ToscaTopologyTemplate(topologyTemplateKey));
+        serviceTemplate.setTopologyTemplate(new ToscaTopologyTemplate());
 
-        PfConceptKey policiesKey = new PfConceptKey("Policies", "1.0.3");
-        serviceTemplate.getTopologyTemplate().setPolicies(new ToscaPolicies(policiesKey));
+        serviceTemplate.getTopologyTemplate().setPolicies(new ToscaPolicies());
         serviceTemplate.getTopologyTemplate().getPolicies().getConceptMap().put(policyKey, toscaPolicy);
 
         return serviceTemplate;
     }
 
     @Override
-    public LegacyOperationalPolicy fromToscaServiceTemplate(ToscaServiceTemplate serviceTemplate) {
-        // TODO Auto-generated method stub
-        return null;
-    }
+    public LegacyOperationalPolicy fromToscaServiceTemplate(final ToscaServiceTemplate serviceTemplate) {
+        ToscaUtils.assertPoliciesExist(serviceTemplate);
+
+        if (serviceTemplate.getTopologyTemplate().getPolicies().getConceptMap().size() > 1) {
+            String errorMessage = "more than one policy found in service template";
+            LOGGER.warn(errorMessage);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
+        }
+
+        // Get the policy
+        final ToscaPolicy toscaPolicy =
+                serviceTemplate.getTopologyTemplate().getPolicies().getAll(null).iterator().next();
+
+        final LegacyOperationalPolicy legacyOperationalPolicy = new LegacyOperationalPolicy();
+        legacyOperationalPolicy.setPolicyId(toscaPolicy.getKey().getName());
+        legacyOperationalPolicy.setPolicyVersion(Integer.toString(toscaPolicy.getKey().getMajorVersion()));
+
+        if (toscaPolicy.getProperties() == null) {
+            String errorMessage = "no properties defined on TOSCA policy";
+            LOGGER.warn(errorMessage);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
+        }
+
+        final String content = toscaPolicy.getProperties().get("Content");
+        if (toscaPolicy.getProperties() == null) {
+            String errorMessage = "property \"Content\" not defined on TOSCA policy";
+            LOGGER.warn(errorMessage);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
+        }
+
+        legacyOperationalPolicy.setContent(content);
 
-    /**
-     * Get the next policy version.
-     *
-     * @return the next version
-     */
-    private static String getNextVersion() {
-        return "1.0." + nextVersion++;
+        return legacyOperationalPolicy;
     }
 }
diff --git a/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/provider/LegacyProvider.java b/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/provider/LegacyProvider.java
new file mode 100644
index 000000000..42343e1df
--- /dev/null
+++ b/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/provider/LegacyProvider.java
@@ -0,0 +1,268 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ * ================================================================================
+ * 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.models.tosca.legacy.provider;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.ws.rs.core.Response;
+
+import lombok.NonNull;
+
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.base.PfModelRuntimeException;
+import org.onap.policy.models.dao.PfDao;
+import org.onap.policy.models.tosca.legacy.concepts.LegacyGuardPolicy;
+import org.onap.policy.models.tosca.legacy.concepts.LegacyOperationalPolicy;
+import org.onap.policy.models.tosca.legacy.mapping.LegacyOperationalPolicyMapper;
+import org.onap.policy.models.tosca.simple.concepts.ToscaPolicies;
+import org.onap.policy.models.tosca.simple.concepts.ToscaPolicy;
+import org.onap.policy.models.tosca.simple.concepts.ToscaServiceTemplate;
+import org.onap.policy.models.tosca.simple.concepts.ToscaTopologyTemplate;
+import org.onap.policy.models.tosca.simple.provider.SimpleToscaProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class provides the provision of information on TOSCA concepts in the database to callers in legacy formats.
+ *
+ * @author Liam Fallon (liam.fallon@est.tech)
+ */
+public class LegacyProvider {
+    private static final Logger LOGGER = LoggerFactory.getLogger(LegacyProvider.class);
+
+    private static final String FIRST_POLICY_VERSION = "1";
+
+    // Recurring constants
+    private static final String NO_POLICY_FOUND_FOR_POLICY_ID = "no policy found for policy ID: ";
+
+    /**
+     * Get legacy operational policy.
+     *
+     * @param dao the DAO to use to access the database
+     * @param policyId ID of the policy.
+     * @return the policies found
+     * @throws PfModelException on errors getting policies
+     */
+    public LegacyOperationalPolicy getOperationalPolicy(@NonNull final PfDao dao, @NonNull final String policyId)
+            throws PfModelException {
+
+        ToscaPolicy newestPolicy = getLatestPolicy(dao, policyId);
+
+        if (newestPolicy == null) {
+            String errorMessage = NO_POLICY_FOUND_FOR_POLICY_ID + policyId;
+            LOGGER.warn(errorMessage);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
+        }
+
+        // Create the structure of the TOSCA service template to contain the policy type
+        ToscaServiceTemplate serviceTemplate = new ToscaServiceTemplate();
+        serviceTemplate.setTopologyTemplate(new ToscaTopologyTemplate());
+        serviceTemplate.getTopologyTemplate().setPolicies(new ToscaPolicies());
+        serviceTemplate.getTopologyTemplate().getPolicies().getConceptMap().put(newestPolicy.getKey(), newestPolicy);
+
+        return new LegacyOperationalPolicyMapper().fromToscaServiceTemplate(serviceTemplate);
+    }
+
+    /**
+     * Create legacy operational policy.
+     *
+     * @param dao the DAO to use to access the database
+     * @param legacyOperationalPolicy the definition of the policy to be created.
+     * @return the created policy
+     * @throws PfModelException on errors creating policies
+     */
+    public LegacyOperationalPolicy createOperationalPolicy(@NonNull final PfDao dao,
+            @NonNull final LegacyOperationalPolicy legacyOperationalPolicy) throws PfModelException {
+
+        // We need to find the latest policy and update the major version, if there is no policy with this ID, then
+        // we set it to the first version
+        ToscaPolicy newestPolicy = getLatestPolicy(dao, legacyOperationalPolicy.getPolicyId());
+
+        if (newestPolicy == null) {
+            legacyOperationalPolicy.setPolicyVersion(FIRST_POLICY_VERSION);
+        } else {
+            legacyOperationalPolicy.setPolicyVersion(Integer.toString(newestPolicy.getKey().getMajorVersion() + 1));
+        }
+
+        ToscaServiceTemplate incomingServiceTemplate =
+                new LegacyOperationalPolicyMapper().toToscaServiceTemplate(legacyOperationalPolicy);
+        ToscaServiceTemplate outgoingingServiceTemplate =
+                new SimpleToscaProvider().createPolicies(dao, incomingServiceTemplate);
+
+        return new LegacyOperationalPolicyMapper().fromToscaServiceTemplate(outgoingingServiceTemplate);
+    }
+
+    /**
+     * Update legacy operational policy.
+     *
+     * @param dao the DAO to use to access the database
+     * @param legacyOperationalPolicy the definition of the policy to be updated
+     * @return the updated policy
+     * @throws PfModelException on errors updating policies
+     */
+    public LegacyOperationalPolicy updateOperationalPolicy(@NonNull final PfDao dao,
+            @NonNull final LegacyOperationalPolicy legacyOperationalPolicy) throws PfModelException {
+
+        // We need to find the latest policy and use the major version, if there is no policy with this ID, then
+        // we have an error
+        ToscaPolicy newestPolicy = getLatestPolicy(dao, legacyOperationalPolicy.getPolicyId());
+
+        if (newestPolicy == null) {
+            String errorMessage = NO_POLICY_FOUND_FOR_POLICY_ID + legacyOperationalPolicy.getPolicyId();
+            LOGGER.warn(errorMessage);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
+        } else {
+            legacyOperationalPolicy.setPolicyVersion(Integer.toString(newestPolicy.getKey().getMajorVersion()));
+        }
+
+        ToscaServiceTemplate incomingServiceTemplate =
+                new LegacyOperationalPolicyMapper().toToscaServiceTemplate(legacyOperationalPolicy);
+        ToscaServiceTemplate outgoingingServiceTemplate =
+                new SimpleToscaProvider().createPolicies(dao, incomingServiceTemplate);
+
+        return new LegacyOperationalPolicyMapper().fromToscaServiceTemplate(outgoingingServiceTemplate);
+    }
+
+    /**
+     * Delete legacy operational policy.
+     *
+     * @param dao the DAO to use to access the database
+     * @param policyId ID of the policy.
+     * @return the deleted policy
+     * @throws PfModelException on errors deleting policies
+     */
+    public LegacyOperationalPolicy deleteOperationalPolicy(@NonNull final PfDao dao, @NonNull final String policyId)
+            throws PfModelException {
+
+        // Get all the policies in the database and check the policy ID against the policies returned
+        List<ToscaPolicy> policyList = dao.getAll(ToscaPolicy.class);
+
+        // Find the latest policy that matches the ID
+        List<ToscaPolicy> policyDeleteList = new ArrayList<>();
+
+        for (ToscaPolicy policy : policyList) {
+            if (policyId.equals(policy.getKey().getName())) {
+                policyDeleteList.add(policy);
+            }
+        }
+
+        if (policyDeleteList.isEmpty()) {
+            String errorMessage = NO_POLICY_FOUND_FOR_POLICY_ID + policyId;
+            LOGGER.warn(errorMessage);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
+        }
+
+        // Create the structure of the TOSCA service template to contain the policy type
+        ToscaServiceTemplate serviceTemplate = new ToscaServiceTemplate();
+        serviceTemplate.setTopologyTemplate(new ToscaTopologyTemplate());
+        serviceTemplate.getTopologyTemplate().setPolicies(new ToscaPolicies());
+
+        for (ToscaPolicy deletePolicy : policyDeleteList) {
+            dao.delete(deletePolicy);
+            serviceTemplate.getTopologyTemplate().getPolicies().getConceptMap().put(deletePolicy.getKey(),
+                    deletePolicy);
+        }
+
+        return new LegacyOperationalPolicyMapper().fromToscaServiceTemplate(serviceTemplate);
+    }
+
+    /**
+     * Get legacy guard policy.
+     *
+     * @param dao the DAO to use to access the database
+     * @param policyId ID of the policy.
+     * @return the policies found
+     * @throws PfModelException on errors getting policies
+     */
+    public LegacyGuardPolicy getGuardPolicy(@NonNull final PfDao dao, @NonNull final String policyId)
+            throws PfModelException {
+        return null;
+    }
+
+    /**
+     * Create legacy guard policy.
+     *
+     * @param dao the DAO to use to access the database
+     * @param legacyGuardPolicy the definition of the policy to be created.
+     * @return the created policy
+     * @throws PfModelException on errors creating policies
+     */
+    public LegacyGuardPolicy createGuardPolicy(@NonNull final PfDao dao,
+            @NonNull final LegacyGuardPolicy legacyGuardPolicy) throws PfModelException {
+        return null;
+    }
+
+    /**
+     * Update legacy guard policy.
+     *
+     * @param dao the DAO to use to access the database
+     * @param legacyGuardPolicy the definition of the policy to be updated
+     * @return the updated policy
+     * @throws PfModelException on errors updating policies
+     */
+    public LegacyGuardPolicy updateGuardPolicy(@NonNull final PfDao dao,
+            @NonNull final LegacyGuardPolicy legacyGuardPolicy) throws PfModelException {
+        return null;
+    }
+
+
+    /**
+     * Delete legacy guard policy.
+     *
+     * @param dao the DAO to use to access the database
+     * @param policyId ID of the policy.
+     * @return the deleted policy
+     * @throws PfModelException on errors deleting policies
+     */
+    public LegacyGuardPolicy deleteGuardPolicy(@NonNull final PfDao dao, @NonNull final String policyId)
+            throws PfModelException {
+        return null;
+    }
+
+    /**
+     * Get the latest policy for a policy ID.
+     *
+     * @param dao The DAO to read from
+     * @param policyId the ID of the policy
+     * @return the policy
+     */
+    private ToscaPolicy getLatestPolicy(final PfDao dao, final String policyId) {
+        // Get all the policies in the database and check the policy ID against the policies returned
+        List<ToscaPolicy> policyList = dao.getAll(ToscaPolicy.class);
+
+        // Find the latest policy that matches the ID
+        ToscaPolicy newestPolicy = null;
+
+        for (ToscaPolicy policy : policyList) {
+            if (!policyId.equals(policy.getKey().getName())) {
+                continue;
+            }
+
+            // We found a matching policy
+            if (newestPolicy == null || policy.getKey().isNewerThan(newestPolicy.getKey())) {
+                // First policy found
+                newestPolicy = policy;
+            }
+        }
+        return newestPolicy;
+    }
+}
diff --git a/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/provider/LegacyToscaProvider.java b/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/provider/LegacyToscaProvider.java
deleted file mode 100644
index da9d929df..000000000
--- a/models-tosca/src/main/java/org/onap/policy/models/tosca/legacy/provider/LegacyToscaProvider.java
+++ /dev/null
@@ -1,139 +0,0 @@
-/*-
- * ============LICENSE_START=======================================================
- *  Copyright (C) 2019 Nordix Foundation.
- * ================================================================================
- * 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.models.tosca.legacy.provider;
-
-import lombok.NonNull;
-
-import org.onap.policy.models.base.PfModelException;
-import org.onap.policy.models.dao.PfDao;
-import org.onap.policy.models.tosca.legacy.concepts.LegacyGuardPolicy;
-import org.onap.policy.models.tosca.legacy.concepts.LegacyOperationalPolicy;
-
-/**
- * This class provides the provision of information on TOSCA concepts in the database to callers in legacy formats.
- *
- * @author Liam Fallon (liam.fallon@est.tech)
- */
-public class LegacyToscaProvider {
-    /**
-     * Get legacy operational policy.
-     *
-     * @param dao the DAO to use to access the database
-     * @param policyId ID of the policy.
-     * @return the policies found
-     * @throws PfModelException on errors getting policies
-     */
-    public LegacyOperationalPolicy getOperationalPolicy(@NonNull final PfDao dao, @NonNull final String policyId)
-            throws PfModelException {
-        return null;
-    }
-
-    /**
-     * Create legacy operational policy.
-     *
-     * @param dao the DAO to use to access the database
-     * @param legacyOperationalPolicy the definition of the policy to be created.
-     * @return the created policy
-     * @throws PfModelException on errors creating policies
-     */
-    public LegacyOperationalPolicy createOperationalPolicy(@NonNull final PfDao dao,
-            @NonNull final LegacyOperationalPolicy legacyOperationalPolicy) throws PfModelException {
-        return null;
-    }
-
-    /**
-     * Update legacy operational policy.
-     *
-     * @param dao the DAO to use to access the database
-     * @param legacyOperationalPolicy the definition of the policy to be updated
-     * @return the updated policy
-     * @throws PfModelException on errors updating policies
-     */
-    public LegacyOperationalPolicy updateOperationalPolicy(@NonNull final PfDao dao,
-            @NonNull final LegacyOperationalPolicy legacyOperationalPolicy) throws PfModelException {
-        return null;
-    }
-
-    /**
-     * Delete legacy operational policy.
-     *
-     * @param dao the DAO to use to access the database
-     * @param policyId ID of the policy.
-     * @return the deleted policy
-     * @throws PfModelException on errors deleting policies
-     */
-    public LegacyOperationalPolicy deleteOperationalPolicy(@NonNull final PfDao dao, @NonNull final String policyId)
-            throws PfModelException {
-        return null;
-    }
-
-    /**
-     * Get legacy guard policy.
-     *
-     * @param dao the DAO to use to access the database
-     * @param policyId ID of the policy.
-     * @return the policies found
-     * @throws PfModelException on errors getting policies
-     */
-    public LegacyGuardPolicy getGuardPolicy(@NonNull final PfDao dao, @NonNull final String policyId)
-            throws PfModelException {
-        return null;
-    }
-
-    /**
-     * Create legacy guard policy.
-     *
-     * @param dao the DAO to use to access the database
-     * @param legacyGuardPolicy the definition of the policy to be created.
-     * @return the created policy
-     * @throws PfModelException on errors creating policies
-     */
-    public LegacyGuardPolicy createGuardPolicy(@NonNull final PfDao dao,
-            @NonNull final LegacyGuardPolicy legacyGuardPolicy) throws PfModelException {
-        return null;
-    }
-
-    /**
-     * Update legacy guard policy.
-     *
-     * @param dao the DAO to use to access the database
-     * @param legacyGuardPolicy the definition of the policy to be updated
-     * @return the updated policy
-     * @throws PfModelException on errors updating policies
-     */
-    public LegacyGuardPolicy updateGuardPolicy(@NonNull final PfDao dao,
-            @NonNull final LegacyGuardPolicy legacyGuardPolicy) throws PfModelException {
-        return null;
-    }
-
-    /**
-     * Delete legacy guard policy.
-     *
-     * @param dao the DAO to use to access the database
-     * @param policyId ID of the policy.
-     * @return the deleted policy
-     * @throws PfModelException on errors deleting policies
-     */
-    public LegacyGuardPolicy deleteGuardPolicy(@NonNull final PfDao dao, @NonNull final String policyId)
-            throws PfModelException {
-        return null;
-    }
-}
diff --git a/models-tosca/src/main/java/org/onap/policy/models/tosca/simple/concepts/ToscaPolicies.java b/models-tosca/src/main/java/org/onap/policy/models/tosca/simple/concepts/ToscaPolicies.java
index ee9c2eae5..f318bb6be 100644
--- a/models-tosca/src/main/java/org/onap/policy/models/tosca/simple/concepts/ToscaPolicies.java
+++ b/models-tosca/src/main/java/org/onap/policy/models/tosca/simple/concepts/ToscaPolicies.java
@@ -47,7 +47,7 @@ import org.onap.policy.models.base.PfConceptKey;
 public class ToscaPolicies extends PfConceptContainer<ToscaPolicy> {
     private static final long serialVersionUID = -7526648702327776101L;
 
-    public static final String DEFAULT_NAME = "ToscaPoliciessSimple";
+    public static final String DEFAULT_NAME = "ToscaPoliciesSimple";
     public static final String DEFAULT_VERSION = "1.0.0";
 
     /**
diff --git a/models-tosca/src/main/java/org/onap/policy/models/tosca/simple/provider/SimpleToscaProvider.java b/models-tosca/src/main/java/org/onap/policy/models/tosca/simple/provider/SimpleToscaProvider.java
index 2240ef099..c7984c5ea 100644
--- a/models-tosca/src/main/java/org/onap/policy/models/tosca/simple/provider/SimpleToscaProvider.java
+++ b/models-tosca/src/main/java/org/onap/policy/models/tosca/simple/provider/SimpleToscaProvider.java
@@ -34,6 +34,7 @@ import org.onap.policy.models.tosca.simple.concepts.ToscaPolicyType;
 import org.onap.policy.models.tosca.simple.concepts.ToscaPolicyTypes;
 import org.onap.policy.models.tosca.simple.concepts.ToscaServiceTemplate;
 import org.onap.policy.models.tosca.simple.concepts.ToscaTopologyTemplate;
+import org.onap.policy.models.tosca.utils.ToscaUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -84,7 +85,7 @@ public class SimpleToscaProvider {
     public ToscaServiceTemplate createPolicyTypes(@NonNull final PfDao dao,
             @NonNull final ToscaServiceTemplate serviceTemplate) throws PfModelException {
 
-        assertPolicyTypesExist(serviceTemplate);
+        ToscaUtils.assertPolicyTypesExist(serviceTemplate);
 
         for (ToscaPolicyType policyType : serviceTemplate.getPolicyTypes().getAll(null)) {
             dao.create(policyType);
@@ -114,7 +115,7 @@ public class SimpleToscaProvider {
     public ToscaServiceTemplate updatePolicyTypes(@NonNull final PfDao dao,
             @NonNull final ToscaServiceTemplate serviceTemplate) throws PfModelException {
 
-        assertPolicyTypesExist(serviceTemplate);
+        ToscaUtils.assertPolicyTypesExist(serviceTemplate);
 
         for (ToscaPolicyType policyType : serviceTemplate.getPolicyTypes().getAll(null)) {
             dao.update(policyType);
@@ -192,7 +193,7 @@ public class SimpleToscaProvider {
     public ToscaServiceTemplate createPolicies(@NonNull final PfDao dao,
             @NonNull final ToscaServiceTemplate serviceTemplate) throws PfModelException {
 
-        assertPoliciesExist(serviceTemplate);
+        ToscaUtils.assertPoliciesExist(serviceTemplate);
 
         for (ToscaPolicy policy : serviceTemplate.getTopologyTemplate().getPolicies().getAll(null)) {
             dao.create(policy);
@@ -222,7 +223,7 @@ public class SimpleToscaProvider {
     public ToscaServiceTemplate updatePolicies(@NonNull final PfDao dao,
             @NonNull final ToscaServiceTemplate serviceTemplate) throws PfModelException {
 
-        assertPoliciesExist(serviceTemplate);
+        ToscaUtils.assertPoliciesExist(serviceTemplate);
 
         for (ToscaPolicy policy : serviceTemplate.getTopologyTemplate().getPolicies().getAll(null)) {
             dao.update(policy);
@@ -258,44 +259,4 @@ public class SimpleToscaProvider {
 
         return serviceTemplate;
     }
-
-    /**
-     * Check if policy types have been specified is initialized.
-     */
-    private void assertPolicyTypesExist(final ToscaServiceTemplate serviceTemplate) {
-        if (serviceTemplate.getPolicyTypes() == null) {
-            String errorMessage = "no policy types specified on service template";
-            LOGGER.warn(errorMessage);
-            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
-        }
-
-        if (serviceTemplate.getPolicyTypes().getConceptMap().isEmpty()) {
-            String errorMessage = "list of policy types specified on service template is empty";
-            LOGGER.warn(errorMessage);
-            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
-        }
-    }
-
-    /**
-     * Check if policy types have been specified is initialized.
-     */
-    private void assertPoliciesExist(final ToscaServiceTemplate serviceTemplate) {
-        if (serviceTemplate.getTopologyTemplate() == null) {
-            String errorMessage = "topology template not specified on service template";
-            LOGGER.warn(errorMessage);
-            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
-        }
-
-        if (serviceTemplate.getTopologyTemplate().getPolicies() == null) {
-            String errorMessage = "no policies specified on topology template of service template";
-            LOGGER.warn(errorMessage);
-            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
-        }
-
-        if (serviceTemplate.getTopologyTemplate().getPolicies().getConceptMap().isEmpty()) {
-            String errorMessage = "list of policies specified on topology template of service template is empty";
-            LOGGER.warn(errorMessage);
-            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
-        }
-    }
 }
diff --git a/models-tosca/src/main/java/org/onap/policy/models/tosca/utils/ToscaUtils.java b/models-tosca/src/main/java/org/onap/policy/models/tosca/utils/ToscaUtils.java
new file mode 100644
index 000000000..a02bfa4b7
--- /dev/null
+++ b/models-tosca/src/main/java/org/onap/policy/models/tosca/utils/ToscaUtils.java
@@ -0,0 +1,85 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ * ================================================================================
+ * 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.models.tosca.utils;
+
+import javax.ws.rs.core.Response;
+
+import org.onap.policy.models.base.PfModelRuntimeException;
+import org.onap.policy.models.tosca.simple.concepts.ToscaServiceTemplate;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Utility class for TOSCA concepts.
+ *
+ * @author Liam Fallon (liam.fallon@est.tech)
+ */
+public final class ToscaUtils {
+    private static final Logger LOGGER = LoggerFactory.getLogger(ToscaUtils.class);
+
+    /**
+     * Private constructor to prevent subclassing.
+     */
+    private ToscaUtils() {
+    }
+
+    /**
+     * Check if policy types have been specified is initialized.
+     */
+    public static void assertPolicyTypesExist(final ToscaServiceTemplate serviceTemplate) {
+        if (serviceTemplate.getPolicyTypes() == null) {
+            String errorMessage = "no policy types specified on service template";
+            LOGGER.warn(errorMessage);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
+        }
+
+        if (serviceTemplate.getPolicyTypes().getConceptMap().isEmpty()) {
+            String errorMessage = "list of policy types specified on service template is empty";
+            LOGGER.warn(errorMessage);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
+        }
+    }
+
+    /**
+     * Check if policy types have been specified is initialized.
+     */
+    public static void assertPoliciesExist(final ToscaServiceTemplate serviceTemplate) {
+        if (serviceTemplate.getTopologyTemplate() == null) {
+            String errorMessage = "topology template not specified on service template";
+            LOGGER.warn(errorMessage);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
+        }
+
+        if (serviceTemplate.getTopologyTemplate().getPolicies() == null) {
+            String errorMessage = "no policies specified on topology template of service template";
+            LOGGER.warn(errorMessage);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
+        }
+
+        if (serviceTemplate.getTopologyTemplate().getPolicies().getConceptMap().isEmpty()) {
+            String errorMessage = "list of policies specified on topology template of service template is empty";
+            LOGGER.warn(errorMessage);
+            throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
+        }
+    }
+
+
+}