Add filter obejcts for concepts

This review:
- Fixes the bug in getting policies where the key fields were null
- Removes complex version checks from DAO interface
- Simplifies provider API by introducing filter objects for searches

Issue-ID: POLICY-1095
Change-Id: I5ab7471c03e8b61849e7882ed18541acd627dc39
Signed-off-by: liamfallon <liam.fallon@est.tech>

4 files changed, 202 insertions, 69 deletions

diff --git a/models-tosca/src/main/java/org/onap/policy/models/tosca/authorative/concepts/ToscaPolicyFilter.java b/models-tosca/src/main/java/org/onap/policy/models/tosca/authorative/concepts/ToscaPolicyFilter.java
new file mode 100644
index 000000000..496c62677
--- /dev/null
+++ b/models-tosca/src/main/java/org/onap/policy/models/tosca/authorative/concepts/ToscaPolicyFilter.java
@@ -0,0 +1,30 @@
+/*-
+ * ============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.authorative.concepts;
+
+/**
+ * Filter class for searches for {@link ToscaPolicy} instances.
+ *
+ * @author Liam Fallon (liam.fallon@est.tech)
+ */
+public class ToscaPolicyFilter {
+
+}
diff --git a/models-tosca/src/main/java/org/onap/policy/models/tosca/authorative/concepts/ToscaPolicyTypeFilter.java b/models-tosca/src/main/java/org/onap/policy/models/tosca/authorative/concepts/ToscaPolicyTypeFilter.java
new file mode 100644
index 000000000..a77e1856b
--- /dev/null
+++ b/models-tosca/src/main/java/org/onap/policy/models/tosca/authorative/concepts/ToscaPolicyTypeFilter.java
@@ -0,0 +1,30 @@
+/*-
+ * ============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.authorative.concepts;
+
+/**
+ * Filter class for searches for {@link ToscaPolicyType} instances.
+ *
+ * @author Liam Fallon (liam.fallon@est.tech)
+ */
+public class ToscaPolicyTypeFilter {
+
+}
diff --git a/models-tosca/src/main/java/org/onap/policy/models/tosca/authorative/provider/AuthorativeToscaProvider.java b/models-tosca/src/main/java/org/onap/policy/models/tosca/authorative/provider/AuthorativeToscaProvider.java
index 2b6c25e7a..274130a71 100644
--- a/models-tosca/src/main/java/org/onap/policy/models/tosca/authorative/provider/AuthorativeToscaProvider.java
+++ b/models-tosca/src/main/java/org/onap/policy/models/tosca/authorative/provider/AuthorativeToscaProvider.java
@@ -21,7 +21,9 @@
 package org.onap.policy.models.tosca.authorative.provider;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
+import java.util.Map;
 
 import lombok.NonNull;
 
@@ -29,7 +31,9 @@ import org.onap.policy.models.base.PfConceptKey;
 import org.onap.policy.models.base.PfModelException;
 import org.onap.policy.models.dao.PfDao;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyFilter;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyType;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyTypeFilter;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
 import org.onap.policy.models.tosca.simple.concepts.JpaToscaServiceTemplate;
 import org.onap.policy.models.tosca.simple.provider.SimpleToscaProvider;
@@ -52,7 +56,7 @@ public class AuthorativeToscaProvider {
     public ToscaServiceTemplate getPolicyTypes(@NonNull final PfDao dao, final String name, final String version)
             throws PfModelException {
 
-        return new SimpleToscaProvider().getPolicyTypes(dao, new PfConceptKey(name, version)).toAuthorative();
+        return new SimpleToscaProvider().getPolicyTypes(dao, name, version).toAuthorative();
     }
 
     /**
@@ -66,33 +70,37 @@ public class AuthorativeToscaProvider {
      */
     public List<ToscaPolicyType> getPolicyTypeList(@NonNull final PfDao dao, final String name, final String version)
             throws PfModelException {
-        return new ArrayList<>();
+
+        return (asConceptList(
+                new SimpleToscaProvider().getPolicyTypes(dao, name, version).toAuthorative().getPolicyTypes()));
     }
 
     /**
-     * Get latest policy types.
+     * Get filtered policy types.
      *
      * @param dao the DAO to use to access the database
-     * @param name the name of the policy type to get, set to null to get all policy types
+     * @param filter the filter for the policy types to get
      * @return the policy types found
      * @throws PfModelException on errors getting policy types
      */
-    public ToscaServiceTemplate getLatestPolicyTypes(@NonNull final PfDao dao, final String name)
-            throws PfModelException {
-        return null;
+    public ToscaServiceTemplate getFilteredPolicyTypes(@NonNull final PfDao dao,
+            @NonNull final ToscaPolicyTypeFilter filter) throws PfModelException {
+        return new SimpleToscaProvider().getFilteredPolicyTypes(dao, filter).toAuthorative();
     }
 
     /**
-     * Get latest policy types.
+     * Get filtered policy types.
      *
      * @param dao the DAO to use to access the database
-     * @param name the name of the policy type to get, set to null to get all policy types
+     * @param filter the filter for the policy types to get
      * @return the policy types found
      * @throws PfModelException on errors getting policy types
      */
-    public List<ToscaPolicyType> getLatestPolicyTypeList(@NonNull final PfDao dao, final String name)
-            throws PfModelException {
-        return new ArrayList<>();
+    public List<ToscaPolicyType> getFilteredPolicyTypeList(@NonNull final PfDao dao,
+            @NonNull final ToscaPolicyTypeFilter filter) throws PfModelException {
+
+        return (asConceptList(
+                new SimpleToscaProvider().getFilteredPolicyTypes(dao, filter).toAuthorative().getPolicyTypes()));
     }
 
     /**
@@ -152,7 +160,7 @@ public class AuthorativeToscaProvider {
     public ToscaServiceTemplate getPolicies(@NonNull final PfDao dao, @NonNull final String name,
             @NonNull final String version) throws PfModelException {
 
-        return new SimpleToscaProvider().getPolicies(dao, new PfConceptKey(name, version)).toAuthorative();
+        return new SimpleToscaProvider().getPolicies(dao, name, version).toAuthorative();
     }
 
     /**
@@ -166,61 +174,38 @@ public class AuthorativeToscaProvider {
      */
     public List<ToscaPolicy> getPolicyList(@NonNull final PfDao dao, final String name, final String version)
             throws PfModelException {
-        return new ArrayList<>();
-    }
 
-    /**
-     * Get policies for a policy type name.
-     *
-     * @param dao the DAO to use to access the database
-     * @param policyTypeName the name of the policy type for which to get policies
-     * @param policyTypeVersion the version of the policy type, null returns all versions of deployed policies for
-     *        policy types
-     * @return the policies found
-     * @throws PfModelException on errors getting policies
-     */
-    public ToscaServiceTemplate getPolicies4PolicyType(@NonNull final PfDao dao, @NonNull final String policyTypeName,
-            final String policyTypeVersion) throws PfModelException {
-        return null;
+        return asConceptList(new SimpleToscaProvider().getPolicies(dao, name, version).toAuthorative()
+                .getToscaTopologyTemplate().getPolicies());
     }
 
     /**
-     * Get policies for a policy type name.
+     * Get filtered policies.
      *
      * @param dao the DAO to use to access the database
-     * @param policyTypeName the name of the policy type for which to get policies
-     * @param policyTypeVersion the version of the policy type, null returns all versions of deployed policies for
-     *        policy types
+     * @param filter the filter for the policies to get
      * @return the policies found
      * @throws PfModelException on errors getting policies
      */
-    public List<ToscaPolicy> getPolicyList4PolicyType(@NonNull final PfDao dao, @NonNull final String policyTypeName,
-            final String policyTypeVersion) throws PfModelException {
-        return new ArrayList<>();
-    }
+    public ToscaServiceTemplate getFilteredPolicies(@NonNull final PfDao dao, @NonNull final ToscaPolicyFilter filter)
+            throws PfModelException {
 
-    /**
-     * Get latest policies.
-     *
-     * @param dao the DAO to use to access the database
-     * @param name the name of the policy to get, null to get all policies
-     * @return the policies found
-     * @throws PfModelException on errors getting policies
-     */
-    public ToscaServiceTemplate getLatestPolicies(@NonNull final PfDao dao, final String name) throws PfModelException {
-        return null;
+        return new SimpleToscaProvider().getFilteredPolicies(dao, filter).toAuthorative();
     }
 
     /**
-     * Get latest policies.
+     * Get filtered policies.
      *
      * @param dao the DAO to use to access the database
-     * @param name the name of the policy to get, null to get all policies
+     * @param filter the filter for the policies to get
      * @return the policies found
      * @throws PfModelException on errors getting policies
      */
-    public List<ToscaPolicy> getLatestPolicyList(@NonNull final PfDao dao, final String name) throws PfModelException {
-        return new ArrayList<>();
+    public List<ToscaPolicy> getFilteredPolicyList(@NonNull final PfDao dao, @NonNull final ToscaPolicyFilter filter)
+            throws PfModelException {
+
+        return asConceptList(new SimpleToscaProvider().getFilteredPolicies(dao, filter).toAuthorative()
+                .getToscaTopologyTemplate().getPolicies());
     }
 
     /**
@@ -267,4 +252,25 @@ public class AuthorativeToscaProvider {
 
         return new SimpleToscaProvider().deletePolicy(dao, new PfConceptKey(name, version)).toAuthorative();
     }
+
+    /**
+     * Return the contents of a list of maps as a plain list.
+     *
+     * @param listOfMaps the list of maps
+     * @return the plain list
+     */
+    private <T> List<T> asConceptList(final List<Map<String, T>> listOfMaps) {
+        if (listOfMaps == null) {
+            return Collections.emptyList();
+        }
+
+        List<T> returnList = new ArrayList<>();
+        for (Map<String, T> conceptMap : listOfMaps) {
+            for (T concept : conceptMap.values()) {
+                returnList.add(concept);
+            }
+        }
+
+        return returnList;
+    }
 }
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 e7e81603a..6c588a50c 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
@@ -20,14 +20,21 @@
 
 package org.onap.policy.models.tosca.simple.provider;
 
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
 import javax.ws.rs.core.Response;
 
 import lombok.NonNull;
 
+import org.onap.policy.models.base.PfConcept;
 import org.onap.policy.models.base.PfConceptKey;
 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.authorative.concepts.ToscaPolicyFilter;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyTypeFilter;
 import org.onap.policy.models.tosca.simple.concepts.JpaToscaPolicies;
 import org.onap.policy.models.tosca.simple.concepts.JpaToscaPolicy;
 import org.onap.policy.models.tosca.simple.concepts.JpaToscaPolicyType;
@@ -50,12 +57,12 @@ public class SimpleToscaProvider {
      * Get policy types.
      *
      * @param dao the DAO to use to access the database
-     * @param policyTypeKey the policy type key for the policy types to be retrieved. A null key name returns all policy
-     *        types. A null key version returns all versions of the policy type name specified in the key.
+     * @param name the name of the policy type to get, set to null to get all policy types
+     * @param version the version of the policy type to get, set to null to get all versions
      * @return the policy types found
      * @throws PfModelException on errors getting policy types
      */
-    public JpaToscaServiceTemplate getPolicyTypes(@NonNull final PfDao dao, @NonNull final PfConceptKey policyTypeKey)
+    public JpaToscaServiceTemplate getPolicyTypes(@NonNull final PfDao dao, final String name, final String version)
             throws PfModelException {
 
         // Create the structure of the TOSCA service template to contain the policy type
@@ -63,18 +70,40 @@ public class SimpleToscaProvider {
         serviceTemplate.setPolicyTypes(new JpaToscaPolicyTypes());
 
         // Add the policy type to the TOSCA service template
-        JpaToscaPolicyType policyType = dao.get(JpaToscaPolicyType.class, policyTypeKey);
-        if (policyType != null) {
-            serviceTemplate.getPolicyTypes().getConceptMap().put(policyTypeKey, policyType);
+        List<JpaToscaPolicyType> jpaPolicyTypeList = dao.getFiltered(JpaToscaPolicyType.class, name, version);
+        if (jpaPolicyTypeList != null) {
+            serviceTemplate.getPolicyTypes().getConceptMap().putAll(asConceptMap(jpaPolicyTypeList));
             return serviceTemplate;
         } else {
-            String errorMessage = "policy type not found: " + policyTypeKey.getId();
+            String errorMessage = "policy type not found: " + name + ":" + version;
             LOGGER.warn(errorMessage);
             throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
         }
     }
 
     /**
+     * Get filtered policy types.
+     *
+     * @param dao the DAO to use to access the database
+     * @param filter the filter for the policy types to get
+     * @return the policy types found
+     * @throws PfModelException on errors getting policy types
+     */
+    public JpaToscaServiceTemplate getFilteredPolicyTypes(@NonNull final PfDao dao,
+            @NonNull final ToscaPolicyTypeFilter filter) throws PfModelException {
+
+        // Create the structure of the TOSCA service template to contain the policy type
+        JpaToscaServiceTemplate serviceTemplate = new JpaToscaServiceTemplate();
+        serviceTemplate.setPolicyTypes(new JpaToscaPolicyTypes());
+
+        List<JpaToscaPolicyType> jpaPolicyTypeList = dao.getAll(JpaToscaPolicyType.class);
+        // TODO: The actual filtering
+
+        serviceTemplate.getPolicyTypes().getConceptMap().putAll(asConceptMap(jpaPolicyTypeList));
+        return serviceTemplate;
+    }
+
+    /**
      * Create policy types.
      *
      * @param dao the DAO to use to access the database
@@ -143,11 +172,11 @@ public class SimpleToscaProvider {
      * @return the TOSCA service template containing the policy types that were deleted
      * @throws PfModelException on errors deleting policy types
      */
-    public JpaToscaServiceTemplate deletePolicyType(@NonNull final PfDao dao,
-            @NonNull final PfConceptKey policyTypeKey)
+    public JpaToscaServiceTemplate deletePolicyType(@NonNull final PfDao dao, @NonNull final PfConceptKey policyTypeKey)
             throws PfModelException {
 
-        JpaToscaServiceTemplate serviceTemplate = getPolicyTypes(dao, policyTypeKey);
+        JpaToscaServiceTemplate serviceTemplate =
+                getPolicyTypes(dao, policyTypeKey.getName(), policyTypeKey.getVersion());
 
         dao.delete(JpaToscaPolicyType.class, policyTypeKey);
 
@@ -158,12 +187,12 @@ public class SimpleToscaProvider {
      * Get policies.
      *
      * @param dao the DAO to use to access the database
-     * @param policyKey the policy key for the policies to be retrieved. The parent name and version must be specified.
-     *        A null local name returns all policies for a parent policy type.
+     * @param name the name of the policy to get, set to null to get all policy types
+     * @param version the version of the policy to get, set to null to get all versions
      * @return the policies found
      * @throws PfModelException on errors getting policies
      */
-    public JpaToscaServiceTemplate getPolicies(@NonNull final PfDao dao, @NonNull final PfConceptKey policyKey)
+    public JpaToscaServiceTemplate getPolicies(@NonNull final PfDao dao, final String name, final String version)
             throws PfModelException {
 
         // Create the structure of the TOSCA service template to contain the policy type
@@ -171,19 +200,42 @@ public class SimpleToscaProvider {
         serviceTemplate.setTopologyTemplate(new JpaToscaTopologyTemplate());
         serviceTemplate.getTopologyTemplate().setPolicies(new JpaToscaPolicies());
 
-        // Add the policy to the TOSCA service template
-        JpaToscaPolicy policy = dao.get(JpaToscaPolicy.class, policyKey);
-        if (policy != null) {
-            serviceTemplate.getTopologyTemplate().getPolicies().getConceptMap().put(policyKey, policy);
+        // Add the policy type to the TOSCA service template
+        List<JpaToscaPolicy> jpaPolicyList = dao.getFiltered(JpaToscaPolicy.class, name, version);
+        if (jpaPolicyList != null) {
+            serviceTemplate.getTopologyTemplate().getPolicies().getConceptMap().putAll(asConceptMap(jpaPolicyList));
             return serviceTemplate;
         } else {
-            String errorMessage = "policy not found: " + policyKey.getId();
+            String errorMessage = "policy not found: " + name + ":" + version;
             LOGGER.warn(errorMessage);
             throw new PfModelRuntimeException(Response.Status.BAD_REQUEST, errorMessage);
         }
     }
 
     /**
+     * Get filtered policies.
+     *
+     * @param dao the DAO to use to access the database
+     * @param filter the filter for the policies to get
+     * @return the policies found
+     * @throws PfModelException on errors getting policies
+     */
+    public JpaToscaServiceTemplate getFilteredPolicies(@NonNull final PfDao dao,
+            @NonNull final ToscaPolicyFilter filter) throws PfModelException {
+
+        // Create the structure of the TOSCA service template to contain the policy type
+        JpaToscaServiceTemplate serviceTemplate = new JpaToscaServiceTemplate();
+        serviceTemplate.setTopologyTemplate(new JpaToscaTopologyTemplate());
+        serviceTemplate.getTopologyTemplate().setPolicies(new JpaToscaPolicies());
+
+        List<JpaToscaPolicy> jpaPolicyList = dao.getAll(JpaToscaPolicy.class);
+        // TODO: Do the actual filtering
+
+        serviceTemplate.getTopologyTemplate().getPolicies().getConceptMap().putAll(asConceptMap(jpaPolicyList));
+        return serviceTemplate;
+    }
+
+    /**
      * Create policies.
      *
      * @param dao the DAO to use to access the database
@@ -254,10 +306,25 @@ public class SimpleToscaProvider {
     public JpaToscaServiceTemplate deletePolicy(@NonNull final PfDao dao, @NonNull final PfConceptKey policyKey)
             throws PfModelException {
 
-        JpaToscaServiceTemplate serviceTemplate = getPolicies(dao, policyKey);
+        JpaToscaServiceTemplate serviceTemplate = getPolicies(dao, policyKey.getName(), policyKey.getVersion());
 
         dao.delete(JpaToscaPolicy.class, policyKey);
 
         return serviceTemplate;
     }
+
+    /**
+     * Convert a list of concepts to a map of concepts.
+     *
+     * @param conceptList the concept list
+     * @return the concept map
+     */
+    private <T extends PfConcept> Map<PfConceptKey, T> asConceptMap(List<T> conceptList) {
+        Map<PfConceptKey, T> conceptMap = new LinkedHashMap<>();
+        for (T concept : conceptList) {
+            conceptMap.put((PfConceptKey) concept.getKey(), concept);
+        }
+
+        return conceptMap;
+    }
 }