Add a new key class which uses @GeneratedValue to base classes

This will provide an alternative unique key.
It will be used in place of PfTimestampKey in the PdpStatistics table.
We make use of the @GeneratedValue annotation to provide this feature.
Added DummyGeneratedIdEntity and unit tests
Added PfFilterFactory class
Added new filter classes

Issue-ID: POLICY-3189
Change-Id: I097eab318d2cb958e1157e35825fd6d35d429a25
Signed-off-by: ktimoney <kevin.timoney@est.tech>

7 files changed, 404 insertions, 81 deletions

diff --git a/models-dao/src/main/java/org/onap/policy/models/dao/PfDao.java b/models-dao/src/main/java/org/onap/policy/models/dao/PfDao.java
index eb77be9c0..844759367 100644
--- a/models-dao/src/main/java/org/onap/policy/models/dao/PfDao.java
+++ b/models-dao/src/main/java/org/onap/policy/models/dao/PfDao.java
@@ -27,6 +27,7 @@ import java.util.List;
 import java.util.Map;
 import org.onap.policy.models.base.PfConcept;
 import org.onap.policy.models.base.PfConceptKey;
+import org.onap.policy.models.base.PfGeneratedIdKey;
 import org.onap.policy.models.base.PfModelException;
 import org.onap.policy.models.base.PfReferenceKey;
 import org.onap.policy.models.base.PfReferenceTimestampKey;
@@ -95,6 +96,15 @@ public interface PfDao {
     <T extends PfConcept> void delete(Class<T> someClass, PfTimestampKey timeStampKey);
 
     /**
+     * Delete an Policy Framework concept on the database.
+     *
+     * @param <T> the type of the object to delete, a subclass of {@link PfConcept}
+     * @param someClass the class of the object to delete, a subclass of {@link PfConcept}
+     * @param idKey the PfConceptIdKey of the object to delete
+     */
+    <T extends PfConcept> void delete(Class<T> someClass, PfGeneratedIdKey idKey);
+
+    /**
      * Create a collection of objects in the database.
      *
      * @param <T> the type of the object to create, a subclass of {@link PfConcept}
@@ -203,6 +213,16 @@ public interface PfDao {
     <T extends PfConcept> T get(Class<T> someClass, PfTimestampKey timestampKey);
 
     /**
+     * Get an object from the database, referred to by reference key.
+     *
+     * @param <T> the type of the object to get, a subclass of {@link PfConcept}
+     * @param someClass the class of the object to get, a subclass of {@link PfConcept}
+     * @param idKey the PfConceptIdKey of the object to get
+     * @return the object that was retrieved from the database or null if the object was not retrieved
+     */
+    <T extends PfConcept> T get(Class<T> someClass, PfGeneratedIdKey idKey);
+
+    /**
      * Get an object from the database, referred to by reference timestamp key.
      *
      * @param <T> the type of the object to get, a subclass of {@link PfConcept}
@@ -252,6 +272,18 @@ public interface PfDao {
     <T extends PfConcept> List<T> getAllVersionsByParent(Class<T> someClass, final String parentKeyName);
 
     /**
+     * Get all the objects in the database of a given type.
+     *
+     * @param <T> the type of the objects to get, a subclass of {@link PfConcept}
+     * @param someClass the class of the objects to get, a subclass of {@link PfConcept}
+     * @param key the key of the PfGeneratedIdKey to get
+     * @param timeStamp the timeStamp of the concepts to get
+     * @return the objects or null if no objects were retrieved
+     */
+    <T extends PfConcept> List<T> getByTimestamp(final Class<T> someClass,
+                                                 final PfGeneratedIdKey key, final Instant timeStamp);
+
+    /**
      * Get a concept from the database with the given concept key.
      *
      * @param <T> the type of the object to get, a subclass of {@link PfConcept}
diff --git a/models-dao/src/main/java/org/onap/policy/models/dao/PfFilter.java b/models-dao/src/main/java/org/onap/policy/models/dao/PfFilter.java
new file mode 100644
index 000000000..ef9d4f939
--- /dev/null
+++ b/models-dao/src/main/java/org/onap/policy/models/dao/PfFilter.java
@@ -0,0 +1,91 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 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.dao;
+
+import java.time.Instant;
+import java.util.Map;
+import lombok.Data;
+/**
+ * This abstract class is used as a base for the filter implementations.
+ *
+ */
+
+@Data
+public abstract class PfFilter {
+    private static final String AND        = " AND ";
+    private static final String ORDER      = " ORDER BY ";
+
+    private String nameFilter;
+    private String timeStampStartFilter;
+    private String timeStampEndFilter;
+    private String timeStampFilter;
+    private String nameParameter;
+
+    /**
+     * Generates filter string.
+     *
+     * @param inputFilterString current filterString generated from FilterMap
+     * @param name the pdpInstance name for the PDP statistics to get
+     * @param startTime the start timeStamp to filter from database, filter rule:
+     *     startTime <= filteredRecord timeStamp <= endTime. null for ignore end time
+     * @param endTime the end timeStamp to filter from database, filter rule:
+     *     startTime <= filteredRecord timeStamp <= endTime. null for ignore end time
+     * @param filterMap Map store extra key/value used to filter from database, can be null     *
+     * @param sortOrder sortOrder to query database
+     * @param getRecordNum Total query count from database
+
+     */
+    public String addFilter(final String inputFilterString,
+        final String name, final Instant startTime, final Instant endTime,
+        final Map<String, Object> filterMap, final String sortOrder, final int getRecordNum) {
+        StringBuilder filterQueryString = new StringBuilder(inputFilterString);
+        if (filterMap != null) {
+            for (String key : filterMap.keySet()) {
+                filterQueryString.append("c." + key + "= :" + key + AND);
+            }
+        }
+
+        if (name != null) {
+            filterQueryString.append(getNameFilter() + AND);
+        }
+
+        if (startTime != null) {
+            if (endTime != null) {
+                filterQueryString.append(getTimeStampStartFilter());
+                filterQueryString.append(AND);
+                filterQueryString.append(getTimeStampEndFilter());
+            } else {
+                filterQueryString.append(getTimeStampStartFilter());
+            }
+        } else {
+            if (endTime != null) {
+                filterQueryString.append(getTimeStampEndFilter());
+            } else {
+                filterQueryString.delete(filterQueryString.length() - AND.length(), filterQueryString.length());
+            }
+        }
+
+        if (getRecordNum > 0) {
+            filterQueryString.append(ORDER + getTimeStampFilter() + sortOrder);
+        }
+        return filterQueryString.toString();
+    }
+}
diff --git a/models-dao/src/main/java/org/onap/policy/models/dao/PfFilterFactory.java b/models-dao/src/main/java/org/onap/policy/models/dao/PfFilterFactory.java
new file mode 100644
index 000000000..643481f39
--- /dev/null
+++ b/models-dao/src/main/java/org/onap/policy/models/dao/PfFilterFactory.java
@@ -0,0 +1,77 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 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.dao;
+
+import java.time.Instant;
+import java.util.Map;
+import org.onap.policy.models.base.PfConcept;
+import org.onap.policy.models.dao.impl.PfNonTimestampKeyFilter;
+import org.onap.policy.models.dao.impl.PfReferenceTimestampKeyFilter;
+import org.onap.policy.models.dao.impl.PfTimestampKeyFilter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This factory class creates a filter class for a key type.
+ * The filter returned depends on the type of class being used.
+ *
+ */
+public class PfFilterFactory {
+    // Get a reference to the logger
+    private static final Logger LOGGER = LoggerFactory.getLogger(PfFilterFactory.class);
+
+    /**
+     * Return a filter class for the input class.
+     *
+     * @param <T> the type of the object to get, a subclass of {@link PfConcept}*
+     * @return the filter type for the input class   *
+     */
+    public <T extends PfConcept> PfFilter createFilter(final Class<T> someClass) {
+        PfFilter filter = null;
+
+        switch (getKeyName(someClass)) {
+            case "PfTimestampKey":
+                filter = new PfTimestampKeyFilter();
+                break;
+            case "PfReferenceTimestampKey":
+                filter = new PfReferenceTimestampKeyFilter();
+                break;
+            default:
+                filter = new PfNonTimestampKeyFilter();
+        }
+        return filter;
+    }
+
+    /**
+     * Gets the name of the key class of the class invoking the DAO.
+     * @param someClass class that invoked Dao
+     * @return the name of the key class
+     */
+    private <T extends PfConcept> String getKeyName(final Class<T> someClass) {
+        try {
+            String fullClassName = someClass.getDeclaredField("key").getType().toString();
+            return fullClassName.substring(fullClassName.lastIndexOf('.') + 1);
+        } catch (NoSuchFieldException e) {
+            LOGGER.error("Error getting the key:", e);
+            return "NON_TIMESTAMP_KEY";
+        }
+    }
+}
diff --git a/models-dao/src/main/java/org/onap/policy/models/dao/impl/DefaultPfDao.java b/models-dao/src/main/java/org/onap/policy/models/dao/impl/DefaultPfDao.java
index bdbc04e22..1bd2e09da 100644
--- a/models-dao/src/main/java/org/onap/policy/models/dao/impl/DefaultPfDao.java
+++ b/models-dao/src/main/java/org/onap/policy/models/dao/impl/DefaultPfDao.java
@@ -34,6 +34,7 @@ import javax.persistence.TypedQuery;
 import javax.ws.rs.core.Response;
 import org.onap.policy.models.base.PfConcept;
 import org.onap.policy.models.base.PfConceptKey;
+import org.onap.policy.models.base.PfGeneratedIdKey;
 import org.onap.policy.models.base.PfModelException;
 import org.onap.policy.models.base.PfModelRuntimeException;
 import org.onap.policy.models.base.PfReferenceKey;
@@ -42,6 +43,8 @@ import org.onap.policy.models.base.PfTimestampKey;
 import org.onap.policy.models.base.PfUtils;
 import org.onap.policy.models.dao.DaoParameters;
 import org.onap.policy.models.dao.PfDao;
+import org.onap.policy.models.dao.PfFilter;
+import org.onap.policy.models.dao.PfFilterFactory;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -56,6 +59,7 @@ public class DefaultPfDao implements PfDao {
     private static final String NAME           = "name";
     private static final String VERSION        = "version";
     private static final String TIMESTAMP      = "timeStamp";
+    private static final String GENERATEDID    = "Id";
     private static final String PARENT_NAME    = "parentname";
     private static final String PARENT_VERSION = "parentversion";
     private static final String LOCAL_NAME     = "localname";
@@ -73,8 +77,8 @@ public class DefaultPfDao implements PfDao {
     private static final String NAME_FILTER            = "c.key.name = :name";
     private static final String VERSION_FILTER         = "c.key.version = :version";
     private static final String TIMESTAMP_FILTER       = "c.key.timeStamp = :timeStamp";
-    private static final String TIMESTAMP_START_FILTER = "c.key.timeStamp >= :startTime";
-    private static final String TIMESTAMP_END_FILTER   = "c.key.timeStamp <= :endTime";
+    private static final String TIMESTAMP_FILTER_NOKEY = "c.timeStamp = :timeStamp";
+    private static final String GENERATED_ID_FILTER    = "c.key.generatedId = :Id";
     private static final String PARENT_NAME_FILTER     = "c.key.parentKeyName = :parentname";
     private static final String PARENT_VERSION_FILTER  = "c.key.parentKeyVersion = :parentversion";
     private static final String LOCAL_NAME_FILTER      = "c.key.localName = :localname";
@@ -89,6 +93,9 @@ public class DefaultPfDao implements PfDao {
     private static final String DELETE_BY_TIMESTAMP_KEY =
             DELETE_FROM_TABLE + WHERE + NAME_FILTER + AND + VERSION_FILTER  + AND + TIMESTAMP_FILTER;
 
+    private static final String DELETE_BY_GENERATED_ID_KEY =
+            DELETE_FROM_TABLE + WHERE + NAME_FILTER + AND + VERSION_FILTER  + AND + GENERATED_ID_FILTER;
+
     private static final String DELETE_BY_REFERENCE_KEY =
             DELETE_FROM_TABLE + WHERE + PARENT_NAME_FILTER + AND + PARENT_VERSION_FILTER + AND + LOCAL_NAME_FILTER;
 
@@ -103,6 +110,9 @@ public class DefaultPfDao implements PfDao {
     private static final String SELECT_BY_CONCEPT_KEY =
             SELECT_FROM_TABLE + WHERE + NAME_FILTER + AND + VERSION_FILTER;
 
+    private static final String SELECT_BY_TIMESTAMP_NOKEY =
+            SELECT_FROM_TABLE + WHERE + NAME_FILTER + AND + VERSION_FILTER + AND + TIMESTAMP_FILTER_NOKEY;
+
     private static final String SELECT_BY_REFERENCE_KEY =
             SELECT_FROM_TABLE + WHERE + PARENT_NAME_FILTER + AND + PARENT_VERSION_FILTER + AND + LOCAL_NAME_FILTER;
     // @formatter:on
@@ -246,6 +256,27 @@ public class DefaultPfDao implements PfDao {
     }
 
     @Override
+    public <T extends PfConcept> void delete(final Class<T> someClass, final PfGeneratedIdKey key) {
+        if (key == null) {
+            return;
+        }
+        final EntityManager mg = getEntityManager();
+        try {
+            // @formatter:off
+            mg.getTransaction().begin();
+            mg.createQuery(setQueryTable(DELETE_BY_GENERATED_ID_KEY, someClass), someClass)
+                    .setParameter(NAME,    key.getName())
+                    .setParameter(VERSION, key.getVersion())
+                    .setParameter(GENERATEDID, key.getGeneratedId())
+                    .executeUpdate();
+            mg.getTransaction().commit();
+            // @formatter:on
+        } finally {
+            mg.close();
+        }
+    }
+
+    @Override
     public <T extends PfConcept> void createCollection(final Collection<T> objs) {
         if (objs == null || objs.isEmpty()) {
             return;
@@ -366,14 +397,11 @@ public class DefaultPfDao implements PfDao {
         String filterQueryString = SELECT_FROM_TABLE + WHERE;
 
         try {
-            if (filterMap != null) {
-                filterQueryString = buildFilter(filterMap, filterQueryString, isRefTimestampKey(someClass));
-            }
-            filterQueryString = addKeyFilterString(filterQueryString, name, startTime, endTime,
-                isRefTimestampKey(someClass));
-            if (getRecordNum > 0) {
-                filterQueryString += ORDER + " c.key.timeStamp " + sortOrder;
-            }
+            PfFilter timeStampFilter = new PfFilterFactory().createFilter(someClass);
+            filterQueryString = timeStampFilter.addFilter(filterQueryString,
+                  name, startTime, endTime, filterMap, sortOrder, getRecordNum);
+
+
             TypedQuery<T> query = mg.createQuery(setQueryTable(filterQueryString, someClass), someClass);
 
             if (filterMap != null) {
@@ -382,11 +410,7 @@ public class DefaultPfDao implements PfDao {
                 }
             }
             if (name != null) {
-                if (isRefTimestampKey(someClass)) {
-                    query.setParameter("parentKeyName", name);
-                } else {
-                    query.setParameter("name", name);
-                }
+                query.setParameter(timeStampFilter.getNameParameter(), name);
             }
             if (startTime != null) {
                 if (endTime != null) {
@@ -411,33 +435,6 @@ public class DefaultPfDao implements PfDao {
         }
     }
 
-    /**
-     * This method checks if the class invoking the DAO is using PfReferenceTimestamp Key.
-     * @param someClass class that invoked Dao
-     * @return true if the key is PfReferenceTimestampKey.
-     */
-    private <T extends PfConcept> boolean isRefTimestampKey(final Class<T> someClass) {
-        try {
-            return PfReferenceTimestampKey.class.isAssignableFrom(someClass.getDeclaredField("key").getType());
-        } catch (NoSuchFieldException e) {
-            LOGGER.error("Error verifying the key for reference timestamp:", e);
-            return false;
-        }
-    }
-
-    private String buildFilter(final Map<String, Object> filterMap, String filterQueryString,
-                               boolean isRefTimestampKey) {
-        StringBuilder bld = new StringBuilder(filterQueryString);
-        for (String key : filterMap.keySet()) {
-            if (isRefTimestampKey) {
-                bld.append("c.key.referenceKey." + key + "= :" + key + AND);
-            } else {
-                bld.append("c." + key + "= :" + key + AND);
-            }
-        }
-        return bld.toString();
-    }
-
     @Override
     public <T extends PfConcept> T get(final Class<T> someClass, final PfConceptKey key) {
         return genericGet(someClass, key);
@@ -449,6 +446,11 @@ public class DefaultPfDao implements PfDao {
     }
 
     @Override
+    public <T extends PfConcept> T get(final Class<T> someClass, final PfGeneratedIdKey key) {
+        return genericGet(someClass, key);
+    }
+
+    @Override
     public <T extends PfConcept> T get(final Class<T> someClass, final PfTimestampKey key) {
         return genericGet(someClass, key);
     }
@@ -540,6 +542,28 @@ public class DefaultPfDao implements PfDao {
     }
 
     @Override
+    public <T extends PfConcept> List<T> getByTimestamp(final Class<T> someClass,
+                                                        final PfGeneratedIdKey key,
+                                                        final Instant timeStamp) {
+        if (someClass == null || key == null || timeStamp == null) {
+            return Collections.emptyList();
+        }
+
+        final EntityManager mg = getEntityManager();
+        try {
+            // @formatter:off
+            return mg.createQuery(setQueryTable(SELECT_BY_TIMESTAMP_NOKEY, someClass), someClass)
+                    .setParameter(NAME,    key.getName())
+                    .setParameter(VERSION, key.getVersion())
+                    .setParameter(TIMESTAMP, Timestamp.from(timeStamp))
+                    .getResultList();
+            // @formatter:on
+        } finally {
+            mg.close();
+        }
+    }
+
+    @Override
     public <T extends PfConcept> T getConcept(final Class<T> someClass, final PfConceptKey key) {
         if (someClass == null || key == null) {
             return null;
@@ -644,45 +668,6 @@ public class DefaultPfDao implements PfDao {
     }
 
     /**
-     * generate filter string with the filter value in TimestampKey.
-     *
-     * @param inputFilterString current filterString generated from FilterMap
-     * @param name the pdp name the start timeStamp to filter from database, filter rule: startTime <= filteredRecord
-     *        timeStamp <= endTime. null for ignore start time.
-     * @param endTime the end timeStamp to filter from database, filter rule: startTime <= filteredRecord timeStamp <=
-     *        endTime. null for ignore end time
-     * @param isRefTimestampKey boolean value, set to true if the query invoked for pfReferenceTimestampKey
-     * @return the filter string to query database
-     */
-    private String addKeyFilterString(String inputFilterString, final String name, final Instant startTime,
-            final Instant endTime, final boolean isRefTimestampKey) {
-        String filterQueryString;
-        String inputFilter = inputFilterString;
-        if (name != null) {
-            if (isRefTimestampKey) {
-                inputFilter += PARENT_NAME_REF_FILTER + AND;
-            } else {
-                inputFilter += NAME_FILTER + AND;
-            }
-        }
-        if (startTime != null) {
-            if (endTime != null) {
-                filterQueryString = inputFilter + TIMESTAMP_START_FILTER + AND + TIMESTAMP_END_FILTER;
-            } else {
-                filterQueryString = inputFilter + TIMESTAMP_START_FILTER;
-            }
-        } else {
-            if (endTime != null) {
-                filterQueryString = inputFilter + TIMESTAMP_END_FILTER;
-            } else {
-                filterQueryString = inputFilter.substring(0, inputFilter.length() - AND.length());
-            }
-        }
-
-        return filterQueryString;
-    }
-
-    /**
      * check the result get from database and return the object.
      *
      * @param <T> the type of the object to get, a subclass of {@link PfConcept}
diff --git a/models-dao/src/main/java/org/onap/policy/models/dao/impl/PfNonTimestampKeyFilter.java b/models-dao/src/main/java/org/onap/policy/models/dao/impl/PfNonTimestampKeyFilter.java
new file mode 100644
index 000000000..9c9a3e844
--- /dev/null
+++ b/models-dao/src/main/java/org/onap/policy/models/dao/impl/PfNonTimestampKeyFilter.java
@@ -0,0 +1,46 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 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.dao.impl;
+
+import org.onap.policy.models.dao.PfFilter;
+
+/**
+ * This class is used to set the values for a non timeStamp key query.
+ *
+ */
+public class PfNonTimestampKeyFilter extends PfFilter {
+    private static final String NAME_FILTER                  = "c.key.name = :name";
+    private static final String TIMESTAMP_START_FILTER       = "c.timeStamp >= :startTime";
+    private static final String TIMESTAMP_END_FILTER         = "c.timeStamp <= :endTime";
+    private static final String TIMESTAMP_FILTER             = " c.timeStamp ";
+    private static final String NAME_PARAMETER               = "name";
+
+    /**
+     * The default constructor injects query strings.
+     */
+    public PfNonTimestampKeyFilter() {
+        setNameFilter(NAME_FILTER);
+        setTimeStampStartFilter(TIMESTAMP_START_FILTER);
+        setTimeStampEndFilter(TIMESTAMP_END_FILTER);
+        setTimeStampFilter(TIMESTAMP_FILTER);
+        setNameParameter(NAME_PARAMETER);
+    }
+}
diff --git a/models-dao/src/main/java/org/onap/policy/models/dao/impl/PfReferenceTimestampKeyFilter.java b/models-dao/src/main/java/org/onap/policy/models/dao/impl/PfReferenceTimestampKeyFilter.java
new file mode 100644
index 000000000..53802f306
--- /dev/null
+++ b/models-dao/src/main/java/org/onap/policy/models/dao/impl/PfReferenceTimestampKeyFilter.java
@@ -0,0 +1,46 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 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.dao.impl;
+
+import org.onap.policy.models.dao.PfFilter;
+
+/**
+ * This class is used to set the values for a reference timeStamp key query.
+ *
+ */
+public class PfReferenceTimestampKeyFilter extends PfFilter {
+    private static final String PARENT_NAME_REF_FILTER       = "c.key.referenceKey.parentKeyName = :parentKeyName";
+    private static final String TIMESTAMP_START_FILTER       = "c.key.timeStamp >= :startTime";
+    private static final String TIMESTAMP_END_FILTER         = "c.key.timeStamp <= :endTime";
+    private static final String TIMESTAMP_FILTER             = " c.key.timeStamp ";
+    private static final String NAME_PARAMETER               = "parentKeyName";
+
+    /**
+     * The default constructor injects query strings.
+     */
+    public PfReferenceTimestampKeyFilter() {
+        setNameFilter(PARENT_NAME_REF_FILTER);
+        setTimeStampStartFilter(TIMESTAMP_START_FILTER);
+        setTimeStampEndFilter(TIMESTAMP_END_FILTER);
+        setTimeStampFilter(TIMESTAMP_FILTER);
+        setNameParameter(NAME_PARAMETER);
+    }
+}
diff --git a/models-dao/src/main/java/org/onap/policy/models/dao/impl/PfTimestampKeyFilter.java b/models-dao/src/main/java/org/onap/policy/models/dao/impl/PfTimestampKeyFilter.java
new file mode 100644
index 000000000..f01f80498
--- /dev/null
+++ b/models-dao/src/main/java/org/onap/policy/models/dao/impl/PfTimestampKeyFilter.java
@@ -0,0 +1,46 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 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.dao.impl;
+
+import org.onap.policy.models.dao.PfFilter;
+
+/**
+ * This class is used to set the values for a timeStamp key query.
+ *
+ */
+public class PfTimestampKeyFilter extends PfFilter {
+    private static final String NAME_FILTER                  = "c.key.name = :name";
+    private static final String TIMESTAMP_START_FILTER       = "c.key.timeStamp >= :startTime";
+    private static final String TIMESTAMP_END_FILTER         = "c.key.timeStamp <= :endTime";
+    private static final String TIMESTAMP_FILTER             = " c.key.timeStamp ";
+    private static final String NAME_PARAMETER               = "name";
+
+    /**
+     * The default constructor injects query strings.
+     */
+    public PfTimestampKeyFilter() {
+        setNameFilter(NAME_FILTER);
+        setTimeStampStartFilter(TIMESTAMP_START_FILTER);
+        setTimeStampEndFilter(TIMESTAMP_END_FILTER);
+        setTimeStampFilter(TIMESTAMP_FILTER);
+        setNameParameter(NAME_PARAMETER);
+    }
+}