Set default and check existance of Policy Type

The TOSCA specification has a "bug" in that it does not have a field to specify
the version of a policy type to use. We already had introduced the "type_version" field
for this.

This review introduces setting of the default version of a policy type to be
be used by a policy as the latest version of the policy type in the database.
As a side effect of this, we now have to check for existence of the policy type
of a policy in the database. This means that creation/update of a policy with
a non-existant policy type specified will now fail.

Issue-ID: POLICY-1738
Change-Id: I27080cf6cd358948810dab6897c72dfe4d41fe91
Signed-off-by: liamfallon <liam.fallon@est.tech>

2 files changed, 86 insertions, 0 deletions

diff --git a/models-base/src/main/java/org/onap/policy/models/base/PfConcept.java b/models-base/src/main/java/org/onap/policy/models/base/PfConcept.java
index c41b0de56..9a376feff 100644
--- a/models-base/src/main/java/org/onap/policy/models/base/PfConcept.java
+++ b/models-base/src/main/java/org/onap/policy/models/base/PfConcept.java
@@ -105,6 +105,24 @@ public abstract class PfConcept implements Serializable, Comparable<PfConcept> {
     }
 
     /**
+     * Gets the name of this concept.
+     *
+     * @return the name of this concept
+     */
+    public String getName() {
+        return getKey().getName();
+    }
+
+    /**
+     * Gets the version of this concept.
+     *
+     * @return the version of this concept
+     */
+    public String getVersion() {
+        return getKey().getVersion();
+    }
+
+    /**
      * Checks if this key matches the given key ID.
      *
      * @param id the key ID to match against
diff --git a/models-base/src/main/java/org/onap/policy/models/base/PfConceptFilter.java b/models-base/src/main/java/org/onap/policy/models/base/PfConceptFilter.java
new file mode 100644
index 000000000..8a9fbc414
--- /dev/null
+++ b/models-base/src/main/java/org/onap/policy/models/base/PfConceptFilter.java
@@ -0,0 +1,68 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ *  Modifications Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.models.base;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import lombok.Builder;
+import lombok.Data;
+import lombok.NonNull;
+
+/**
+ * Filter class for searches for {@link ToscaPolicy} instances. If any fields are null, they are ignored.
+ *
+ * @author Liam Fallon (liam.fallon@est.tech)
+ */
+@Builder
+@Data
+public class PfConceptFilter implements PfObjectFilter<PfConcept> {
+    public static final String LATEST_VERSION = "LATEST";
+
+    // Exact expression
+    private String name;
+
+    // Exact match, set to LATEST_VERSION to get the latest version
+    private String version;
+
+    // version prefix
+    private String versionPrefix;
+
+    @Override
+    public List<PfConcept> filter(@NonNull final List<PfConcept> originalList) {
+
+        // @formatter:off
+        List<PfConcept> returnList = originalList.stream()
+                .filter(filterStringPred(name, PfConcept::getName))
+                .filter(filterStringPred((LATEST_VERSION.equals(version) ? null : version), PfConcept::getVersion))
+                .filter(filterPrefixPred(versionPrefix, PfConcept::getVersion))
+                .collect(Collectors.toList());
+        // @formatter:off
+
+        if (LATEST_VERSION.equals(version)) {
+            return this.latestVersionFilter(returnList);
+        }
+        else {
+            return returnList;
+        }
+    }
+}