Incorporate filters in provider functions

Use filters to GET wildcard/latest/deployed policies
and policy types.

Junit tests for providers are coming in next patch/review.

Issue-ID: POLICY-1441
Change-Id: Iccd02f395d612ba95728d1bc5808ad16c6f386fe
Signed-off-by: Chenfei Gao <cgao@research.att.com>
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>

10 files changed, 398 insertions, 65 deletions

diff --git a/main/src/main/java/org/onap/policy/api/main/rest/LegacyApiRestController.java b/main/src/main/java/org/onap/policy/api/main/rest/LegacyApiRestController.java
index 38736e85..dbf519eb 100644
--- a/main/src/main/java/org/onap/policy/api/main/rest/LegacyApiRestController.java
+++ b/main/src/main/java/org/onap/policy/api/main/rest/LegacyApiRestController.java
@@ -58,8 +58,8 @@ import org.onap.policy.models.tosca.legacy.concepts.LegacyOperationalPolicy;
  */
 @Path("/policy/api/v1")
 @Api(value = "Legacy Policy Design API")
-@Produces({"application/json; vnd.onap.guard", "application/json; vnd.onap.operational"})
-@Consumes({"application/json; vnd.onap.guard", "application/json; vnd.onap.operational"})
+@Produces("application/json")
+@Consumes("application/json")
 public class LegacyApiRestController {
 
     /**
@@ -69,7 +69,6 @@ public class LegacyApiRestController {
      */
     @GET
     @Path("/policytypes/onap.policy.controlloop.guard/versions/1.0.0/policies")
-    @Produces("application/json; vnd.onap.guard")
     @ApiOperation(value = "Retrieve all versions of guard policies",
             notes = "Returns a list of all versions of guard policies",
             response = LegacyGuardPolicyOutput.class, responseContainer = "Map",
@@ -108,7 +107,7 @@ public class LegacyApiRestController {
 
         try {
             Map<String, LegacyGuardPolicyOutput> policies = new LegacyGuardPolicyProvider()
-                    .fetchGuardPolicies(null, null);
+                    .fetchGuardPolicy(null, null);
             return addLoggingHeaders(addVersionControlHeaders(Response.status(Response.Status.OK)), requestId)
                     .entity(policies).build();
         } catch (PfModelException | PfModelRuntimeException pfme) {
@@ -127,7 +126,6 @@ public class LegacyApiRestController {
      */
     @GET
     @Path("/policytypes/onap.policy.controlloop.guard/versions/1.0.0/policies/{policyId}")
-    @Produces("application/json; vnd.onap.guard")
     @ApiOperation(value = "Retrieve all versions of a particular guard policy",
             notes = "Returns a list of all versions of the specified guard policy",
             response = LegacyGuardPolicyOutput.class, responseContainer = "Map",
@@ -168,7 +166,7 @@ public class LegacyApiRestController {
 
         try {
             Map<String, LegacyGuardPolicyOutput> policies = new LegacyGuardPolicyProvider()
-                    .fetchGuardPolicies(policyId, null);
+                    .fetchGuardPolicy(policyId, null);
             return addLoggingHeaders(addVersionControlHeaders(Response.status(Response.Status.OK)), requestId)
                     .entity(policies).build();
         } catch (PfModelException | PfModelRuntimeException pfme) {
@@ -188,7 +186,6 @@ public class LegacyApiRestController {
      */
     @GET
     @Path("/policytypes/onap.policy.controlloop.guard/versions/1.0.0/policies/{policyId}/versions/{policyVersion}")
-    @Produces("application/json; vnd.onap.guard")
     @ApiOperation(value = "Retrieve one version of a particular guard policy",
             notes = "Returns a particular version of a specified guard policy",
             response = LegacyGuardPolicyOutput.class, responseContainer = "Map",
@@ -230,7 +227,7 @@ public class LegacyApiRestController {
 
         try {
             Map<String, LegacyGuardPolicyOutput> policies = new LegacyGuardPolicyProvider()
-                    .fetchGuardPolicies(policyId, policyVersion);
+                    .fetchGuardPolicy(policyId, policyVersion);
             return addLoggingHeaders(addVersionControlHeaders(Response.status(Response.Status.OK)), requestId)
                     .entity(policies).build();
         } catch (PfModelException | PfModelRuntimeException pfme) {
@@ -249,8 +246,6 @@ public class LegacyApiRestController {
      */
     @POST
     @Path("/policytypes/onap.policy.controlloop.guard/versions/1.0.0/policies")
-    @Consumes("application/json; vnd.onap.guard")
-    @Produces("application/json; vnd.onap.guard")
     @ApiOperation(value = "Create a new guard policy",
             notes = "Client should provide entity body of the new guard policy",
             authorizations = @Authorization(value = "basicAuth"),
@@ -310,7 +305,6 @@ public class LegacyApiRestController {
      */
     @DELETE
     @Path("/policytypes/onap.policy.controlloop.guard/versions/1.0.0/policies/{policyId}/versions/{policyVersion}")
-    @Produces("application/json; vnd.onap.guard")
     @ApiOperation(value = "Delete a particular version of a guard policy",
             notes = "Rule: the version that has been deployed in PDP group(s) cannot be deleted",
             authorizations = @Authorization(value = "basicAuth"),
@@ -353,7 +347,7 @@ public class LegacyApiRestController {
 
         try {
             Map<String, LegacyGuardPolicyOutput> policies = new LegacyGuardPolicyProvider()
-                    .deleteGuardPolicies(policyId, policyVersion);
+                    .deleteGuardPolicy(policyId, policyVersion);
             return addLoggingHeaders(addVersionControlHeaders(Response.status(Response.Status.OK)), requestId)
                     .entity(policies).build();
         } catch (PfModelException | PfModelRuntimeException pfme) {
@@ -370,7 +364,6 @@ public class LegacyApiRestController {
      */
     @GET
     @Path("/policytypes/onap.policy.controlloop.operational/versions/1.0.0/policies")
-    @Produces("application/json; vnd.onap.operational")
     @ApiOperation(value = "Retrieve all versions of operational policies",
             notes = "Returns a list of all versions of operational policies",
             response = LegacyOperationalPolicy.class,
@@ -409,7 +402,7 @@ public class LegacyApiRestController {
 
         try {
             LegacyOperationalPolicy policy = new LegacyOperationalPolicyProvider()
-                    .fetchOperationalPolicies(null, null);
+                    .fetchOperationalPolicy(null, null);
             return addLoggingHeaders(addVersionControlHeaders(Response.status(Response.Status.OK)), requestId)
                     .entity(policy).build();
         } catch (PfModelException | PfModelRuntimeException pfme) {
@@ -428,7 +421,6 @@ public class LegacyApiRestController {
      */
     @GET
     @Path("/policytypes/onap.policy.controlloop.operational/versions/1.0.0/policies/{policyId}")
-    @Produces("application/json; vnd.onap.operational")
     @ApiOperation(value = "Retrieve all versions of a particular operational policy",
             notes = "Returns a list of all versions of the specified operational policy",
             response = LegacyOperationalPolicy.class,
@@ -469,7 +461,7 @@ public class LegacyApiRestController {
 
         try {
             LegacyOperationalPolicy policy = new LegacyOperationalPolicyProvider()
-                    .fetchOperationalPolicies(policyId, null);
+                    .fetchOperationalPolicy(policyId, null);
             return addLoggingHeaders(addVersionControlHeaders(Response.status(Response.Status.OK)), requestId)
                     .entity(policy).build();
         } catch (PfModelException | PfModelRuntimeException pfme) {
@@ -490,7 +482,6 @@ public class LegacyApiRestController {
     @GET
     @Path("/policytypes/onap.policy.controlloop.operational/versions/1.0.0/"
          + "policies/{policyId}/versions/{policyVersion}")
-    @Produces("application/json; vnd.onap.operational")
     @ApiOperation(value = "Retrieve one version of a particular operational policy",
             notes = "Returns a particular version of a specified operational policy",
             response = LegacyOperationalPolicy.class,
@@ -532,7 +523,7 @@ public class LegacyApiRestController {
 
         try {
             LegacyOperationalPolicy policy = new LegacyOperationalPolicyProvider()
-                    .fetchOperationalPolicies(policyId, policyVersion);
+                    .fetchOperationalPolicy(policyId, policyVersion);
             return addLoggingHeaders(addVersionControlHeaders(Response.status(Response.Status.OK)), requestId)
                     .entity(policy).build();
         } catch (PfModelException | PfModelRuntimeException pfme) {
@@ -551,8 +542,6 @@ public class LegacyApiRestController {
      */
     @POST
     @Path("/policytypes/onap.policy.controlloop.operational/versions/1.0.0/policies")
-    @Consumes("application/json; vnd.onap.operational")
-    @Produces("application/json; vnd.onap.operational")
     @ApiOperation(value = "Create a new operational policy",
             notes = "Client should provide entity body of the new operational policy",
             authorizations = @Authorization(value = "basicAuth"),
@@ -614,7 +603,6 @@ public class LegacyApiRestController {
     @DELETE
     @Path("/policytypes/onap.policy.controlloop.operational/versions/1.0.0/"
          + "policies/{policyId}/versions/{policyVersion}")
-    @Produces("application/json; vnd.onap.operational")
     @ApiOperation(value = "Delete a particular version of a specified operational policy",
             notes = "Rule: the version that has been deployed in PDP group(s) cannot be deleted",
             authorizations = @Authorization(value = "basicAuth"),
@@ -657,7 +645,7 @@ public class LegacyApiRestController {
 
         try {
             LegacyOperationalPolicy policy = new LegacyOperationalPolicyProvider()
-                    .deleteOperationalPolicies(policyId, policyVersion);
+                    .deleteOperationalPolicy(policyId, policyVersion);
             return addLoggingHeaders(addVersionControlHeaders(Response.status(Response.Status.OK)), requestId)
                     .entity(policy).build();
         } catch (PfModelException | PfModelRuntimeException pfme) {
diff --git a/main/src/main/java/org/onap/policy/api/main/rest/provider/LegacyGuardPolicyProvider.java b/main/src/main/java/org/onap/policy/api/main/rest/provider/LegacyGuardPolicyProvider.java
index 60d1b1f2..bdfe4306 100644
--- a/main/src/main/java/org/onap/policy/api/main/rest/provider/LegacyGuardPolicyProvider.java
+++ b/main/src/main/java/org/onap/policy/api/main/rest/provider/LegacyGuardPolicyProvider.java
@@ -50,7 +50,6 @@ public class LegacyGuardPolicyProvider {
         ApiParameterGroup parameterGroup = ParameterService.get("ApiGroup");
         PolicyModelsProviderParameters providerParameters = parameterGroup.getDatabaseProviderParameters();
         modelsProvider = new PolicyModelsProviderFactory().createPolicyModelsProvider(providerParameters);
-        modelsProvider.init();
     }
 
     /**
@@ -61,10 +60,11 @@ public class LegacyGuardPolicyProvider {
      *
      * @return the map of LegacyGuardPolicyOutput objects
      */
-    public Map<String, LegacyGuardPolicyOutput> fetchGuardPolicies(String policyId, String policyVersion)
+    public Map<String, LegacyGuardPolicyOutput> fetchGuardPolicy(String policyId, String policyVersion)
             throws PfModelException {
 
         Map<String, LegacyGuardPolicyOutput> guardPolicies = modelsProvider.getGuardPolicy(policyId);
+
         close();
         return guardPolicies;
     }
@@ -77,7 +77,9 @@ public class LegacyGuardPolicyProvider {
      * @return the map of LegacyGuardPolicyOutput objectst
      */
     public Map<String, LegacyGuardPolicyOutput> createGuardPolicy(LegacyGuardPolicyInput body) throws PfModelException {
+
         Map<String, LegacyGuardPolicyOutput> guardPolicies = modelsProvider.createGuardPolicy(body);
+
         close();
         return guardPolicies;
     }
@@ -90,10 +92,11 @@ public class LegacyGuardPolicyProvider {
      *
      * @return the map of LegacyGuardPolicyOutput objects
      */
-    public Map<String, LegacyGuardPolicyOutput> deleteGuardPolicies(String policyId, String policyVersion)
+    public Map<String, LegacyGuardPolicyOutput> deleteGuardPolicy(String policyId, String policyVersion)
             throws PfModelException {
 
         Map<String, LegacyGuardPolicyOutput> guardPolicies = modelsProvider.deleteGuardPolicy(policyId);
+
         close();
         return guardPolicies;
     }
diff --git a/main/src/main/java/org/onap/policy/api/main/rest/provider/LegacyOperationalPolicyProvider.java b/main/src/main/java/org/onap/policy/api/main/rest/provider/LegacyOperationalPolicyProvider.java
index 2f0b127a..e46b4c62 100644
--- a/main/src/main/java/org/onap/policy/api/main/rest/provider/LegacyOperationalPolicyProvider.java
+++ b/main/src/main/java/org/onap/policy/api/main/rest/provider/LegacyOperationalPolicyProvider.java
@@ -48,7 +48,6 @@ public class LegacyOperationalPolicyProvider {
         ApiParameterGroup parameterGroup = ParameterService.get("ApiGroup");
         PolicyModelsProviderParameters providerParameters = parameterGroup.getDatabaseProviderParameters();
         modelsProvider = new PolicyModelsProviderFactory().createPolicyModelsProvider(providerParameters);
-        modelsProvider.init();
     }
 
     /**
@@ -59,10 +58,11 @@ public class LegacyOperationalPolicyProvider {
      *
      * @return the LegacyOperationalPolicy object
      */
-    public LegacyOperationalPolicy fetchOperationalPolicies(String policyId, String policyVersion)
+    public LegacyOperationalPolicy fetchOperationalPolicy(String policyId, String policyVersion)
             throws PfModelException {
 
         LegacyOperationalPolicy operationalPolicy = modelsProvider.getOperationalPolicy(policyId);
+
         close();
         return operationalPolicy;
     }
@@ -77,6 +77,7 @@ public class LegacyOperationalPolicyProvider {
     public LegacyOperationalPolicy createOperationalPolicy(LegacyOperationalPolicy body) throws PfModelException {
 
         LegacyOperationalPolicy operationalPolicy = modelsProvider.createOperationalPolicy(body);
+
         close();
         return operationalPolicy;
     }
@@ -89,10 +90,11 @@ public class LegacyOperationalPolicyProvider {
      *
      * @return the LegacyOperationalPolicy object
      */
-    public LegacyOperationalPolicy deleteOperationalPolicies(String policyId, String policyVersion)
+    public LegacyOperationalPolicy deleteOperationalPolicy(String policyId, String policyVersion)
             throws PfModelException {
 
         LegacyOperationalPolicy operationalPolicy = modelsProvider.deleteOperationalPolicy(policyId);
+
         close();
         return operationalPolicy;
     }
diff --git a/main/src/main/java/org/onap/policy/api/main/rest/provider/PolicyProvider.java b/main/src/main/java/org/onap/policy/api/main/rest/provider/PolicyProvider.java
index 8ce9a499..d7f152ea 100644
--- a/main/src/main/java/org/onap/policy/api/main/rest/provider/PolicyProvider.java
+++ b/main/src/main/java/org/onap/policy/api/main/rest/provider/PolicyProvider.java
@@ -29,10 +29,15 @@ import org.apache.commons.lang3.tuple.Pair;
 import org.onap.policy.api.main.parameters.ApiParameterGroup;

 import org.onap.policy.common.parameters.ParameterService;

 import org.onap.policy.models.base.PfModelException;

+import org.onap.policy.models.pdp.concepts.PdpGroup;

+import org.onap.policy.models.pdp.concepts.PdpGroupFilter;

 import org.onap.policy.models.provider.PolicyModelsProvider;

 import org.onap.policy.models.provider.PolicyModelsProviderFactory;

 import org.onap.policy.models.provider.PolicyModelsProviderParameters;

 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.ToscaPolicyIdentifier;

+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyTypeIdentifier;

 import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;

 

 /**

@@ -52,7 +57,6 @@ public class PolicyProvider {
         ApiParameterGroup parameterGroup = ParameterService.get("ApiGroup");

         PolicyModelsProviderParameters providerParameters = parameterGroup.getDatabaseProviderParameters();

         modelsProvider = new PolicyModelsProviderFactory().createPolicyModelsProvider(providerParameters);

-        modelsProvider.init();

     }

 

     /**

@@ -70,13 +74,20 @@ public class PolicyProvider {
     public ToscaServiceTemplate fetchPolicies(String policyTypeId, String policyTypeVersion,

             String policyId, String policyVersion) throws PfModelException {

 

-        validatePathParam(policyTypeId, policyTypeVersion);

+        validatePolicyTypeExist(policyTypeId, policyTypeVersion);

+

         ToscaServiceTemplate serviceTemplate;

-        if (policyId == null) {

-            serviceTemplate = modelsProvider.getPolicies4PolicyType(policyTypeId, policyTypeVersion);

+        if (policyId == null || policyVersion == null) {

+            ToscaPolicyFilter policyFilter = ToscaPolicyFilter.builder()

+                    .name(policyId).version(policyVersion)

+                    .type(policyTypeId).typeVersion(policyTypeVersion).build();

+            serviceTemplate = modelsProvider.getFilteredPolicies(policyFilter);

         } else {

             serviceTemplate = modelsProvider.getPolicies(policyId, policyVersion);

         }

+

+        validatePolicyTypeMatch(policyTypeId, policyTypeVersion, serviceTemplate);

+

         close();

         return serviceTemplate;

     }

@@ -95,8 +106,15 @@ public class PolicyProvider {
     public ToscaServiceTemplate fetchLatestPolicies(String policyTypeId, String policyTypeVersion,

             String policyId) throws PfModelException {

 

-        validatePathParam(policyTypeId, policyTypeVersion);

-        ToscaServiceTemplate serviceTemplate = modelsProvider.getLatestPolicies(policyId);

+        validatePolicyTypeExist(policyTypeId, policyTypeVersion);

+

+        ToscaPolicyFilter policyFilter = ToscaPolicyFilter.builder()

+                .name(policyId).version(ToscaPolicyFilter.LATEST_VERSION)

+                .type(policyTypeId).typeVersion(policyTypeVersion).build();

+        ToscaServiceTemplate serviceTemplate = modelsProvider.getFilteredPolicies(policyFilter);

+

+        validatePolicyTypeMatch(policyTypeId, policyTypeVersion, serviceTemplate);

+

         close();

         return serviceTemplate;

     }

@@ -115,10 +133,19 @@ public class PolicyProvider {
     public Map<Pair<String, String>, List<ToscaPolicy>> fetchDeployedPolicies(

             String policyTypeId, String policyTypeVersion, String policyId) throws PfModelException {

 

-        validatePathParam(policyTypeId, policyTypeVersion);

-        Map<Pair<String, String>, List<ToscaPolicy>> deployedPolicies = modelsProvider.getDeployedPolicyList(policyId);

+        validatePolicyTypeExist(policyTypeId, policyTypeVersion);

+

+        ToscaPolicyIdentifier policyIdentifier = new ToscaPolicyIdentifier();

+        policyIdentifier.setName(policyId);

+        PdpGroupFilter pdpGroupFilter = PdpGroupFilter.builder()

+                .policyType(new ToscaPolicyTypeIdentifier(policyTypeId, policyTypeVersion))

+                .policy(policyIdentifier).build();

+        List<PdpGroup> pdpGroups = modelsProvider.getFilteredPdpGroups(pdpGroupFilter);

+

+        //TODO: I don't know how to get policies matching policyId that are deployed in those PDP groups

+

         close();

-        return deployedPolicies;

+        return null;

     }

 

     /**

@@ -135,9 +162,11 @@ public class PolicyProvider {
     public ToscaServiceTemplate createPolicy(String policyTypeId, String policyTypeVersion,

                                              ToscaServiceTemplate body) throws PfModelException {

 

-        validatePathParam(policyTypeId, policyTypeVersion);

+        validatePolicyTypeExist(policyTypeId, policyTypeVersion);

         validatePolicyTypeMatch(policyTypeId, policyTypeVersion, body);

+

         ToscaServiceTemplate serviceTemplate = modelsProvider.createPolicies(body);

+

         close();

         return serviceTemplate;

     }

@@ -157,23 +186,29 @@ public class PolicyProvider {
     public ToscaServiceTemplate deletePolicy(String policyTypeId, String policyTypeVersion,

                                  String policyId, String policyVersion) throws PfModelException {

 

-        validatePathParam(policyTypeId, policyTypeVersion);

-        ToscaServiceTemplate serviceTemplate = modelsProvider.deletePolicy(policyId, policyVersion);

+        validatePolicyTypeExist(policyTypeId, policyTypeVersion);

+

+        ToscaServiceTemplate serviceTemplate = modelsProvider.getPolicies(policyId, policyVersion);

+

+        validatePolicyTypeMatch(policyTypeId, policyTypeVersion, serviceTemplate);

+        validateDeleteEligibility(policyTypeId, policyTypeVersion, policyId, policyVersion);

+

+        ToscaServiceTemplate deletedServiceTemplate = modelsProvider.deletePolicy(policyId, policyVersion);

+

         close();

-        return serviceTemplate;

+        return deletedServiceTemplate;

     }

 

     /**

-     * Checks the validation of policy type info passed in as path param.

+     * Validates whether policy type exists.

      *

      * @param policyTypeId the ID of policy type

      * @param policyTypeVersion the version of policy type

      *

      * @throws PfModelException the PfModel parsing exception

      */

-    private void validatePathParam(String policyTypeId, String policyTypeVersion) throws PfModelException {

+    private void validatePolicyTypeExist(String policyTypeId, String policyTypeVersion) throws PfModelException {

 

-        // Check policy type existence

         try {

             modelsProvider.getPolicyTypes(policyTypeId, policyTypeVersion);

         } catch (Exception e) {

@@ -182,16 +217,18 @@ public class PolicyProvider {
     }

 

     /**

-     * Validates the match between policy type specified in path param and the one specified in type of policy.

+     * Validates the match between policy type specified in path and the one specified in type of policy.

      *

-     * @param body the ToscaServiceTemplate to create

+     * @param policyTypeId the ID of policy type

+     * @param policyTypeVersion the version of policy type

+     * @param serviceTemplate the ToscaServiceTemplate to validate

      *

      * @throws PfModelException the PfModel parsing exception

      */

-    private void validatePolicyTypeMatch(String policyTypeId, String policyTypeVersion, ToscaServiceTemplate body)

-            throws PfModelException {

+    private void validatePolicyTypeMatch(String policyTypeId, String policyTypeVersion,

+            ToscaServiceTemplate serviceTemplate) throws PfModelException {

 

-        List<Map<String, ToscaPolicy>> policies = body.getToscaTopologyTemplate().getPolicies();

+        List<Map<String, ToscaPolicy>> policies = serviceTemplate.getToscaTopologyTemplate().getPolicies();

         for (Map<String, ToscaPolicy> policy : policies) {

             if (policy.size() != 1) {

                 throw new PfModelException(Response.Status.BAD_REQUEST,

@@ -199,13 +236,36 @@ public class PolicyProvider {
             }

             ToscaPolicy policyContent = policy.values().iterator().next();

             if (!policyTypeId.equalsIgnoreCase(policyContent.getType())

-                    || !policyTypeVersion.equalsIgnoreCase(policyContent.getVersion())) {

-                throw new PfModelException(Response.Status.BAD_REQUEST, "policy type info does not match");

+                    || !policyTypeVersion.equalsIgnoreCase(policyContent.getTypeVersion())) {

+                throw new PfModelException(Response.Status.BAD_REQUEST, "policy type does not match");

             }

         }

     }

 

     /**

+     * Validates whether specified policy can be deleted based on the rule that deployed policy cannot be deleted.

+     *

+     * @param policyTypeId the ID of policy type

+     * @param policyTypeVersion the version of policy type

+     * @param policyId the ID of policy

+     * @param policyVersion the version of policy

+     *

+     * @throws PfModelException the PfModel parsing exception

+     */

+    private void validateDeleteEligibility(String policyTypeId, String policyTypeVersion,

+            String policyId, String policyVersion) throws PfModelException {

+

+        PdpGroupFilter pdpGroupFilter = PdpGroupFilter.builder()

+                .policyType(new ToscaPolicyTypeIdentifier(policyTypeId, policyTypeVersion))

+                .policy(new ToscaPolicyIdentifier(policyId, policyVersion)).build();

+

+        List<PdpGroup> pdpGroups = modelsProvider.getFilteredPdpGroups(pdpGroupFilter);

+        if (!pdpGroups.isEmpty()) {

+            throw new PfModelException(Response.Status.CONFLICT, "the policy has been deployed in pdp group");

+        }

+    }

+

+    /**

      * Closes the connection to database.

      *

      * @throws PfModelException the PfModel parsing exception

@@ -218,4 +278,4 @@ public class PolicyProvider {
                     Response.Status.INTERNAL_SERVER_ERROR, "error closing connection to database", e);

         }

     }

-}
\ No newline at end of file
+}

diff --git a/main/src/main/java/org/onap/policy/api/main/rest/provider/PolicyTypeProvider.java b/main/src/main/java/org/onap/policy/api/main/rest/provider/PolicyTypeProvider.java
index 04d8a725..8fab2bdb 100644
--- a/main/src/main/java/org/onap/policy/api/main/rest/provider/PolicyTypeProvider.java
+++ b/main/src/main/java/org/onap/policy/api/main/rest/provider/PolicyTypeProvider.java
@@ -22,13 +22,18 @@
 

 package org.onap.policy.api.main.rest.provider;

 

+import java.util.List;

 import javax.ws.rs.core.Response;

 import org.onap.policy.api.main.parameters.ApiParameterGroup;

 import org.onap.policy.common.parameters.ParameterService;

 import org.onap.policy.models.base.PfModelException;

+import org.onap.policy.models.pdp.concepts.PdpGroup;

+import org.onap.policy.models.pdp.concepts.PdpGroupFilter;

 import org.onap.policy.models.provider.PolicyModelsProvider;

 import org.onap.policy.models.provider.PolicyModelsProviderFactory;

 import org.onap.policy.models.provider.PolicyModelsProviderParameters;

+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyTypeFilter;

+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyTypeIdentifier;

 import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;

 

 /**

@@ -48,7 +53,6 @@ public class PolicyTypeProvider {
         ApiParameterGroup parameterGroup = ParameterService.get("ApiGroup");

         PolicyModelsProviderParameters providerParameters = parameterGroup.getDatabaseProviderParameters();

         modelsProvider = new PolicyModelsProviderFactory().createPolicyModelsProvider(providerParameters);

-        modelsProvider.init();

     }

 

     /**

@@ -64,7 +68,15 @@ public class PolicyTypeProvider {
     public ToscaServiceTemplate fetchPolicyTypes(String policyTypeId, String policyTypeVersion)

             throws PfModelException {

 

-        ToscaServiceTemplate serviceTemplate = modelsProvider.getPolicyTypes(policyTypeId, policyTypeVersion);

+        ToscaServiceTemplate serviceTemplate;

+        if (policyTypeId == null || policyTypeVersion == null) {

+            ToscaPolicyTypeFilter policyTypeFilter = ToscaPolicyTypeFilter.builder()

+                    .name(policyTypeId).version(policyTypeVersion).build();

+            serviceTemplate = modelsProvider.getFilteredPolicyTypes(policyTypeFilter);

+        } else {

+            serviceTemplate = modelsProvider.getPolicyTypes(policyTypeId, policyTypeVersion);

+        }

+

         close();

         return serviceTemplate;

     }

@@ -80,7 +92,10 @@ public class PolicyTypeProvider {
      */

     public ToscaServiceTemplate fetchLatestPolicyTypes(String policyTypeId) throws PfModelException {

 

-        ToscaServiceTemplate serviceTemplate = modelsProvider.getLatestPolicyTypes(policyTypeId);

+        ToscaPolicyTypeFilter policyTypeFilter = ToscaPolicyTypeFilter.builder()

+                .name(policyTypeId).version(ToscaPolicyTypeFilter.LATEST_VERSION).build();

+        ToscaServiceTemplate serviceTemplate = modelsProvider.getFilteredPolicyTypes(policyTypeFilter);

+

         close();

         return serviceTemplate;

     }

@@ -96,6 +111,7 @@ public class PolicyTypeProvider {
     public ToscaServiceTemplate createPolicyType(ToscaServiceTemplate body) throws PfModelException {

 

         ToscaServiceTemplate serviceTemplate = modelsProvider.createPolicyTypes(body);

+

         close();

         return serviceTemplate;

     }

@@ -113,12 +129,38 @@ public class PolicyTypeProvider {
     public ToscaServiceTemplate deletePolicyType(String policyTypeId, String policyTypeVersion)

             throws PfModelException {

 

+        validateDeleteEligibility(policyTypeId, policyTypeVersion);

+

         ToscaServiceTemplate serviceTemplate = modelsProvider.deletePolicyType(policyTypeId, policyTypeVersion);

+

         close();

         return serviceTemplate;

     }

 

     /**

+     * Validates whether specified policy type can be deleted based on the rule that

+     * policy type parameterized by at least one policies cannot be deleted.

+     *

+     * @param policyTypeId the ID of policy type

+     * @param policyTypeVersion the version of policy type

+     * @param policyId the ID of policy

+     * @param policyVersion the version of policy

+     *

+     * @throws PfModelException the PfModel parsing exception

+     */

+    private void validateDeleteEligibility(String policyTypeId, String policyTypeVersion) throws PfModelException {

+

+        PdpGroupFilter pdpGroupFilter = PdpGroupFilter.builder()

+                .policyType(new ToscaPolicyTypeIdentifier(policyTypeId, policyTypeVersion)).build();

+

+        List<PdpGroup> pdpGroups = modelsProvider.getFilteredPdpGroups(pdpGroupFilter);

+        if (!pdpGroups.isEmpty()) {

+            throw new PfModelException(Response.Status.CONFLICT,

+                    "the policy type is parameterized by at least one policies that have been deployed in pdp group");

+        }

+    }

+

+    /**

      * Closes the connection to database.

      *

      * @throws PfModelException the PfModel parsing exception

diff --git a/main/src/main/java/org/onap/policy/api/main/startstop/ApiActivator.java b/main/src/main/java/org/onap/policy/api/main/startstop/ApiActivator.java
index 4cd98849..dc61f3de 100644
--- a/main/src/main/java/org/onap/policy/api/main/startstop/ApiActivator.java
+++ b/main/src/main/java/org/onap/policy/api/main/startstop/ApiActivator.java
@@ -1,7 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
- * ONAP Policy API 
- * ================================================================================ 
+ * ONAP Policy API
+ * ================================================================================
  * Copyright (C) 2018 Samsung Electronics Co., Ltd. All rights reserved.
  * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
@@ -35,7 +35,7 @@ import org.slf4j.LoggerFactory;
  * and forwarding handlers.
  */
 public class ApiActivator {
-    
+
     private static final Logger LOGGER = LoggerFactory.getLogger(ApiActivator.class);
 
     private final ApiParameterGroup apiParameterGroup;
@@ -112,7 +112,7 @@ public class ApiActivator {
      * @param apiParameterGroup the api parameter group
      */
     public void registerToParameterService(final ApiParameterGroup apiParameterGroup) {
-        ParameterService.register(apiParameterGroup);
+        ParameterService.register(apiParameterGroup, true);
     }
 
     /**
diff --git a/main/src/test/java/org/onap/policy/api/main/rest/provider/TestLegacyGuardPolicyProvider.java b/main/src/test/java/org/onap/policy/api/main/rest/provider/TestLegacyGuardPolicyProvider.java
index 8f4f9aed..08f7fecd 100644
--- a/main/src/test/java/org/onap/policy/api/main/rest/provider/TestLegacyGuardPolicyProvider.java
+++ b/main/src/test/java/org/onap/policy/api/main/rest/provider/TestLegacyGuardPolicyProvider.java
@@ -20,7 +20,62 @@
  * ============LICENSE_END=========================================================
  */
 
-
 package org.onap.policy.api.main.rest.provider;
 
-public class TestLegacyGuardPolicyProvider {}
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import java.util.Base64;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.api.main.parameters.ApiParameterGroup;
+import org.onap.policy.common.parameters.ParameterService;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.provider.PolicyModelsProviderParameters;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class performs unit test of {@link LegacyGuardPolicyProvider}
+ *
+ * @author Chenfei Gao (cgao@research.att.com)
+ */
+public class TestLegacyGuardPolicyProvider {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(TestPolicyProvider.class);
+
+    private LegacyGuardPolicyProvider guardPolicyProvider;
+
+    /**
+     * Initialize parameters.
+     */
+    @Before
+    public void setupParameters() throws PfModelException {
+
+        PolicyModelsProviderParameters parameters = new PolicyModelsProviderParameters();
+        parameters.setDatabaseUrl("jdbc:h2:mem:testdb");
+        parameters.setDatabaseUser("policy");
+        parameters.setDatabasePassword(Base64.getEncoder().encodeToString("P01icY".getBytes()));
+        parameters.setPersistenceUnit("ToscaConceptTest");
+        ApiParameterGroup paramGroup = new ApiParameterGroup("ApiGroup", null, parameters);
+        ParameterService.register(paramGroup, true);
+        guardPolicyProvider = new LegacyGuardPolicyProvider();
+    }
+
+    @Test
+    public void testFetchGuardPolicy() {
+
+    }
+
+    @Test
+    public void testCreateGuardPolicy() {
+
+    }
+
+    @Test
+    public void testDeleteGuardPolicy() {
+
+    }
+}
diff --git a/main/src/test/java/org/onap/policy/api/main/rest/provider/TestLegacyOperationalPolicyProvider.java b/main/src/test/java/org/onap/policy/api/main/rest/provider/TestLegacyOperationalPolicyProvider.java
index de12fca0..86124c74 100644
--- a/main/src/test/java/org/onap/policy/api/main/rest/provider/TestLegacyOperationalPolicyProvider.java
+++ b/main/src/test/java/org/onap/policy/api/main/rest/provider/TestLegacyOperationalPolicyProvider.java
@@ -20,7 +20,62 @@
  * ============LICENSE_END=========================================================
  */
 
-
 package org.onap.policy.api.main.rest.provider;
 
-public class TestLegacyOperationalPolicyProvider {}
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import java.util.Base64;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.api.main.parameters.ApiParameterGroup;
+import org.onap.policy.common.parameters.ParameterService;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.provider.PolicyModelsProviderParameters;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class performs unit test of {@link LegacyOperationalPolicyProvider}
+ *
+ * @author Chenfei Gao (cgao@research.att.com)
+ */
+public class TestLegacyOperationalPolicyProvider {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(TestPolicyProvider.class);
+
+    private LegacyOperationalPolicyProvider operationalPolicyProvider;
+
+    /**
+     * Initialize parameters.
+     */
+    @Before
+    public void setupParameters() throws PfModelException {
+
+        PolicyModelsProviderParameters parameters = new PolicyModelsProviderParameters();
+        parameters.setDatabaseUrl("jdbc:h2:mem:testdb");
+        parameters.setDatabaseUser("policy");
+        parameters.setDatabasePassword(Base64.getEncoder().encodeToString("P01icY".getBytes()));
+        parameters.setPersistenceUnit("ToscaConceptTest");
+        ApiParameterGroup paramGroup = new ApiParameterGroup("ApiGroup", null, parameters);
+        ParameterService.register(paramGroup, true);
+        operationalPolicyProvider = new LegacyOperationalPolicyProvider();
+    }
+
+    @Test
+    public void testFetchOperationalPolicy() {
+
+    }
+
+    @Test
+    public void testCreateOperationalPolicy() {
+
+    }
+
+    @Test
+    public void testDeleteOperationalPolicy() {
+
+    }
+}
diff --git a/main/src/test/java/org/onap/policy/api/main/rest/provider/TestPolicyProvider.java b/main/src/test/java/org/onap/policy/api/main/rest/provider/TestPolicyProvider.java
index 11d7e404..eeb4dbae 100644
--- a/main/src/test/java/org/onap/policy/api/main/rest/provider/TestPolicyProvider.java
+++ b/main/src/test/java/org/onap/policy/api/main/rest/provider/TestPolicyProvider.java
@@ -22,4 +22,71 @@
 
 package org.onap.policy.api.main.rest.provider;
 
-public class TestPolicyProvider {}
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import java.util.Base64;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.api.main.parameters.ApiParameterGroup;
+import org.onap.policy.common.parameters.ParameterService;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.provider.PolicyModelsProviderParameters;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class performs unit test of {@link PolicyProvider}
+ *
+ * @author Chenfei Gao (cgao@research.att.com)
+ */
+public class TestPolicyProvider {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(TestPolicyProvider.class);
+
+    private PolicyProvider policyProvider;
+
+    /**
+     * Initialize parameters.
+     */
+    @Before
+    public void setupParameters() throws PfModelException {
+
+        PolicyModelsProviderParameters parameters = new PolicyModelsProviderParameters();
+        parameters.setDatabaseUrl("jdbc:h2:mem:testdb");
+        parameters.setDatabaseUser("policy");
+        parameters.setDatabasePassword(Base64.getEncoder().encodeToString("P01icY".getBytes()));
+        parameters.setPersistenceUnit("ToscaConceptTest");
+        ApiParameterGroup paramGroup = new ApiParameterGroup("ApiGroup", null, parameters);
+        ParameterService.register(paramGroup, true);
+        policyProvider = new PolicyProvider();
+        System.out.println("xxxx");
+    }
+
+    @Test
+    public void testFetchPolicies() {
+
+    }
+
+    @Test
+    public void testFetchLatestPolicies() {
+
+    }
+
+    @Test
+    public void testFetchDeployedPolicies() {
+
+    }
+
+    @Test
+    public void testCreatePolicy() {
+
+    }
+
+    @Test
+    public void testDeletePolicy() {
+
+    }
+}
diff --git a/main/src/test/java/org/onap/policy/api/main/rest/provider/TestPolicyTypeProvider.java b/main/src/test/java/org/onap/policy/api/main/rest/provider/TestPolicyTypeProvider.java
index d60dc2e5..4c3f23b3 100644
--- a/main/src/test/java/org/onap/policy/api/main/rest/provider/TestPolicyTypeProvider.java
+++ b/main/src/test/java/org/onap/policy/api/main/rest/provider/TestPolicyTypeProvider.java
@@ -22,4 +22,65 @@
 
 package org.onap.policy.api.main.rest.provider;
 
-public class TestPolicyTypeProvider {}
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import java.util.Base64;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.api.main.parameters.ApiParameterGroup;
+import org.onap.policy.common.parameters.ParameterService;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.provider.PolicyModelsProviderParameters;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class performs unit test of {@link PolicyTypeProvider}
+ *
+ * @author Chenfei Gao (cgao@research.att.com)
+ */
+public class TestPolicyTypeProvider {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(TestPolicyTypeProvider.class);
+
+    private PolicyTypeProvider policyTypeProvider;
+
+    /**
+     * Initialize parameters.
+     */
+    @Before
+    public void setupParameters() throws PfModelException {
+
+        PolicyModelsProviderParameters parameters = new PolicyModelsProviderParameters();
+        parameters.setDatabaseUrl("jdbc:h2:mem:testdb");
+        parameters.setDatabaseUser("policy");
+        parameters.setDatabasePassword(Base64.getEncoder().encodeToString("P01icY".getBytes()));
+        parameters.setPersistenceUnit("ToscaConceptTest");
+        ApiParameterGroup paramGroup = new ApiParameterGroup("ApiGroup", null, parameters);
+        ParameterService.register(paramGroup, true);
+        policyTypeProvider = new PolicyTypeProvider();
+    }
+
+    @Test
+    public void testFetchPolicyTypes() {
+
+    }
+
+    @Test
+    public void testFetchLatestPolicyTypes() {
+
+    }
+
+    @Test
+    public void testCreatePolicyType() {
+
+    }
+
+    @Test
+    public void testDeletePolicyType() {
+
+    }
+}