1 files changed, 161 insertions, 0 deletions
diff --git a/src/main/java/org/onap/schema/OxmModelLoader.java b/src/main/java/org/onap/schema/OxmModelLoader.java
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+++ b/src/main/java/org/onap/schema/OxmModelLoader.java
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+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017-2018 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.schema;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import javax.ws.rs.core.Response.Status;
+import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;
+import org.onap.aai.cl.eelf.LoggerFactory;
+import org.onap.aai.nodes.NodeIngestor;
+import org.onap.aai.setup.ConfigTranslator;
+import org.onap.aai.setup.SchemaLocationsBean;
+import org.onap.aai.setup.Version;
+import org.onap.crud.exception.CrudException;
+import org.onap.crud.logging.CrudServiceMsgs;
+import org.onap.schema.util.SchemaIngestPropertyReader;
+
+public class OxmModelLoader {
+
+    private static Map<String, DynamicJAXBContext> versionContextMap =
+            new ConcurrentHashMap<>();
+
+    static final Pattern p = Pattern.compile("aai_oxm_(.*).xml");
+    static final Pattern versionPattern = Pattern.compile("V(\\d*)");
+
+    private static org.onap.aai.cl.api.Logger logger =
+            LoggerFactory.getInstance().getLogger(OxmModelLoader.class.getName());
+
+    private OxmModelLoader() {
+    }
+
+    /**
+     * Finds all OXM model files
+     *
+     * @throws SpikeException
+     * @throws IOException
+     *
+     */
+    public static synchronized void loadModels() throws CrudException {
+        SchemaIngestPropertyReader schemaIngestPropertyReader = new SchemaIngestPropertyReader();
+
+        SchemaLocationsBean schemaLocationsBean = new SchemaLocationsBean();
+        schemaLocationsBean.setNodeDirectory(schemaIngestPropertyReader.getNodeDir());
+        ConfigTranslator configTranslator = new OxmModelConfigTranslator(schemaLocationsBean);
+        NodeIngestor nodeIngestor = new NodeIngestor(configTranslator);
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("Loading OXM Models");
+        }
+
+        for (Version oxmVersion : Version.values()) {
+            DynamicJAXBContext jaxbContext = nodeIngestor.getContextForVersion(oxmVersion);
+            if (jaxbContext != null) {
+                loadModel(oxmVersion.toString().toLowerCase(), jaxbContext);
+            }
+        }
+    }
+
+
+    private static synchronized void loadModel(String oxmVersion, DynamicJAXBContext jaxbContext) {
+        versionContextMap.put(oxmVersion, jaxbContext);
+        logger.info(CrudServiceMsgs.LOADED_OXM_FILE, oxmVersion);
+    }
+
+    /**
+     * Retrieves the JAXB context for the specified OXM model version.
+     *
+     * @param version - The OXM version that we want the JAXB context for.
+     *
+     * @return - A JAXB context derived from the OXM model schema.
+     *
+     * @throws SpikeException
+     */
+    public static DynamicJAXBContext getContextForVersion(String version) throws CrudException {
+
+        // If we haven't already loaded in the available OXM models, then do so now.
+        if (versionContextMap == null || versionContextMap.isEmpty()) {
+            loadModels();
+        } else if (!versionContextMap.containsKey(version)) {
+			logger.error(CrudServiceMsgs.OXM_LOAD_ERROR, "Error loading oxm model: " + version);
+            throw new CrudException("Error loading oxm model: " + version, Status.INTERNAL_SERVER_ERROR);
+        }
+
+        return versionContextMap.get(version);
+    }
+
+    public static String getLatestVersion() throws CrudException {
+
+        // If we haven't already loaded in the available OXM models, then do so now.
+        if (versionContextMap == null || versionContextMap.isEmpty()) {
+            loadModels();
+        }
+
+        // If there are still no models available, then there's not much we can do...
+        if (versionContextMap.isEmpty()) {
+			logger.error(CrudServiceMsgs.OXM_LOAD_ERROR, "No available OXM schemas to get latest version for.");
+            throw new CrudException("No available OXM schemas to get latest version for.",
+                    Status.INTERNAL_SERVER_ERROR);
+        }
+
+        // Iterate over the available model versions to determine which is the most
+        // recent.
+        Integer latestVersion = null;
+        String latestVersionStr = null;
+        for (String versionKey : versionContextMap.keySet()) {
+
+            Matcher matcher = versionPattern.matcher(versionKey.toUpperCase());
+            if (matcher.find()) {
+
+                int currentVersion = Integer.parseInt(matcher.group(1));
+
+                if ((latestVersion == null) || (currentVersion > latestVersion)) {
+                    latestVersion = currentVersion;
+                    latestVersionStr = versionKey;
+                }
+            }
+        }
+
+        return latestVersionStr;
+    }
+
+    /**
+     * Retrieves the map of all JAXB context objects that have been created by importing the
+     * available OXM model schemas.
+     *
+     * @return - Map of JAXB context objects.
+     */
+    public static Map<String, DynamicJAXBContext> getVersionContextMap() {
+        return versionContextMap;
+    }
+
+    /**
+     * Assigns the map of all JAXB context objects.
+     *
+     * @param versionContextMap
+     */
+    public static void setVersionContextMap(Map<String, DynamicJAXBContext> versionContextMap) {
+        OxmModelLoader.versionContextMap = versionContextMap;
+    }
+}