1 files changed, 99 insertions, 0 deletions
diff --git a/src/main/java/org/onap/aai/validation/reader/OxmReader.java b/src/main/java/org/onap/aai/validation/reader/OxmReader.java
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+++ b/src/main/java/org/onap/aai/validation/reader/OxmReader.java
@@ -0,0 +1,99 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * 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.
+ * ============LICENSE_END=====================================================
+ */
+package org.onap.aai.validation.reader;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.ServiceConfigurationError;
+import org.eclipse.persistence.internal.oxm.mappings.Descriptor;
+import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;
+import org.onap.aai.nodes.NodeIngestor;
+import org.onap.aai.setup.Version;
+import org.onap.aai.validation.exception.ValidationServiceError;
+import org.onap.aai.validation.exception.ValidationServiceException;
+import org.onap.aai.validation.util.StringUtils;
+
+/**
+ * Reads the primary keys of a specific OXM resource (identified by version).
+ */
+public class OxmReader {
+
+    private NodeIngestor nodeIngestor;
+    private Version version;
+    private Map<String, List<String>> primaryKeysMap = new HashMap<>();
+
+    public OxmReader(NodeIngestor nodeIngestor, Version version) {
+        this.nodeIngestor = nodeIngestor;
+        this.version = version;
+    }
+
+    public OxmReader(NodeIngestor nodeIngestor) {
+        this(nodeIngestor, Version.getLatest());
+    }
+
+    /**
+     * Get the primary keys for a given entity type.
+     *
+     * @param entityType the name of the entity type
+     * @return the primary keys for the entity type
+     * @throws ValidationServiceException
+     */
+    public List<String> getPrimaryKeys(String entityType) throws ValidationServiceException {
+        if (primaryKeysMap.isEmpty()) {
+            throw new ValidationServiceException(ValidationServiceError.OXM_MISSING_KEY, entityType);
+        }
+
+        List<String> primaryKeys = primaryKeysMap.get(entityType);
+        return primaryKeys != null ? primaryKeys : Collections.emptyList();
+    }
+
+    /**
+     * Populate a Map of primary keys for the entity types defined in the OXM.<br>
+     * The primary keys are keyed by the Default Root Element.
+     */
+    public void init() {
+        for (Descriptor<?, ?, ?, ?, ?, ?, ?, ?, ?, ?> descriptor : getObjectDescriptors()) {
+            if (!descriptor.getPrimaryKeyFieldNames().isEmpty()) {
+                primaryKeysMap.put(descriptor.getDefaultRootElement(),
+                        StringUtils.stripSuffix(descriptor.getPrimaryKeyFieldNames(), "/text()"));
+            }
+        }
+    }
+
+    /**
+     * Gets a list of descriptors from the OXM. These descriptor objects contain property information about each entity
+     * type.
+     *
+     * @return list of descriptors
+     */
+    @SuppressWarnings("rawtypes")
+    private List<Descriptor> getObjectDescriptors() {
+        DynamicJAXBContext dynamicJaxbContext = nodeIngestor.getContextForVersion(version);
+        if (dynamicJaxbContext == null) {
+            throw new ServiceConfigurationError("OXM Version " + version + " was not ingested.");
+        }
+        return dynamicJaxbContext.getXMLContext().getDescriptors();
+    }
+
+    public Map<String, List<String>> getPrimaryKeysMap() {
+        return primaryKeysMap;
+    }
+
+}