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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2019 AT&T Intellectual Property. All rights reserved.
* Copyright © 2019 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.schemaif.oxm;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.persistence.dynamic.DynamicType;
import org.eclipse.persistence.internal.oxm.mappings.Descriptor;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;
import org.onap.aai.cl.eelf.LoggerFactory;
import org.onap.aai.nodes.NodeIngestor;
import org.onap.aai.schemaif.SchemaProviderException;
import org.onap.aai.schemaif.SchemaProviderMsgs;
import org.onap.aai.schemaif.definitions.VertexSchema;
import org.onap.aai.setup.SchemaVersion;
import org.onap.aai.setup.Translator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/**
* This class contains all of the logic for importing OXM model schemas from the available OXM
* schema files.
*/
@Component
public class OxmSchemaLoader {
private static Translator translator;
private static NodeIngestor nodeIngestor;
private static Map<String, DynamicJAXBContext> versionContextMap = new ConcurrentHashMap<>();
private static Map<String, HashMap<String, DynamicType>> xmlElementLookup = new ConcurrentHashMap<>();
private static Map<String, HashMap<String, VertexSchema>> vertexLookup = new ConcurrentHashMap<>();
final static Pattern versionPattern = Pattern.compile("(?i)v(\\d*)");
private static org.onap.aai.cl.api.Logger logger =
LoggerFactory.getInstance().getLogger(OxmSchemaLoader.class.getName());
private OxmSchemaLoader() {}
/**
* This constructor presents an awkward marrying of Spring bean creation and static method use. This
* is technical debt that will need fixing.
*
* @param translator contains schema versions configuration
* @param nodeIngestor provides DynamicJAXBContext for the OXM version
*/
@Autowired
public OxmSchemaLoader(Translator translator, NodeIngestor nodeIngestor) {
OxmSchemaLoader.translator = translator;
OxmSchemaLoader.nodeIngestor = nodeIngestor;
}
/**
* Finds all OXM model files
*
* @throws SchemaProviderException
* @throws IOException
*
*/
public synchronized static void loadModels() throws SchemaProviderException {
if (logger.isDebugEnabled()) {
logger.debug("Loading OXM Models");
}
for (SchemaVersion oxmVersion : translator.getSchemaVersions().getVersions()) {
DynamicJAXBContext jaxbContext = nodeIngestor.getContextForVersion(oxmVersion);
if (jaxbContext != null) {
loadModel(oxmVersion.toString(), jaxbContext);
}
}
}
private synchronized static void loadModel(String oxmVersion, DynamicJAXBContext jaxbContext) {
versionContextMap.put(oxmVersion, jaxbContext);
loadXmlLookupMap(oxmVersion, jaxbContext);
loadVertexLookupMap(oxmVersion, jaxbContext);
logger.info(SchemaProviderMsgs.LOADED_SCHEMA_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 SchemaProviderException
*/
public static DynamicJAXBContext getContextForVersion(String version) throws SchemaProviderException {
// 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)) {
throw new SchemaProviderException("Error loading oxm model: " + version);
}
return versionContextMap.get(version);
}
public static String getLatestVersion() throws SchemaProviderException {
// 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()) {
throw new SchemaProviderException("No available OXM schemas to get latest version for.");
}
// 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);
if (matcher.find()) {
int currentVersion = Integer.valueOf(matcher.group(1));
if ((latestVersion == null) || (currentVersion > latestVersion)) {
latestVersion = currentVersion;
latestVersionStr = versionKey;
}
}
}
return latestVersionStr;
}
private static void loadXmlLookupMap(String version, DynamicJAXBContext jaxbContext) {
@SuppressWarnings("rawtypes")
List<Descriptor> descriptorsList = jaxbContext.getXMLContext().getDescriptors();
HashMap<String, DynamicType> types = new HashMap<String, DynamicType>();
for (@SuppressWarnings("rawtypes")
Descriptor desc : descriptorsList) {
DynamicType entity = jaxbContext.getDynamicType(desc.getAlias());
String entityName = desc.getDefaultRootElement();
types.put(entityName, entity);
}
xmlElementLookup.put(version, types);
}
private static void loadVertexLookupMap(String version, DynamicJAXBContext jaxbContext) {
@SuppressWarnings("rawtypes")
List<Descriptor> descriptorsList = jaxbContext.getXMLContext().getDescriptors();
HashMap<String, VertexSchema> vertexMap = new HashMap<String, VertexSchema>();
for (@SuppressWarnings("rawtypes")
Descriptor desc : descriptorsList) {
try {
FromOxmVertexSchema vs = new FromOxmVertexSchema();
vs.fromOxm(desc.getDefaultRootElement(), jaxbContext, getXmlLookupMap(version));
vertexMap.put(vs.getName(), vs);
} catch (SchemaProviderException e) {
continue;
}
}
vertexLookup.put(version, vertexMap);
}
/**
* Retrieves the list of all Loaded OXM versions.
*
* @return - A List of Strings of all loaded OXM versions.
*
* @throws SpikeException
*/
public static List<String> getLoadedOXMVersions() throws SchemaProviderException {
// 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(SchemaProviderMsgs.SCHEMA_LOAD_ERROR, "No available OXM schemas to get versions for.");
throw new SchemaProviderException("No available OXM schemas to get latest version for.");
}
List<String> versions = new ArrayList<String>();
for (String versionKey : versionContextMap.keySet()) {
Matcher matcher = versionPattern.matcher(versionKey);
if (matcher.find()) {
versions.add("V" + matcher.group(1));
}
}
return versions;
}
public static HashMap<String, DynamicType> getXmlLookupMap(String version) {
return xmlElementLookup.get(version);
}
public static HashMap<String, VertexSchema> getVertexLookupForVersion(String version) throws SchemaProviderException {
// If we haven't already loaded in the available OXM models, then do so now.
if (vertexLookup == null || vertexLookup.isEmpty()) {
loadModels();
} else if (!vertexLookup.containsKey(version)) {
throw new SchemaProviderException("Error loading oxm model: " + version);
}
return vertexLookup.get(version);
}
}
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