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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property.
* Copyright © 2017-2018 Amdocs
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.aaiutils.oxm;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.xml.bind.JAXBException;
import org.eclipse.persistence.jaxb.JAXBContextProperties;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContextFactory;
import org.onap.aai.cl.api.Logger;
import org.onap.aai.cl.eelf.LoggerFactory;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
public class OxmModelLoader {
private static final Pattern AAI_OXM_FILE_PATTERN = Pattern.compile("aai_oxm_(.*).xml");
private static Map<String, DynamicJAXBContext> versionContextMap = new ConcurrentHashMap<>();
private static final Logger LOGGER = LoggerFactory.getInstance().getLogger(OxmModelLoader.class.getName());
public synchronized static void loadModels() throws Exception {
OxmModelLoader.loadModels("classpath*:/oxm/aai_oxm*.xml", AAI_OXM_FILE_PATTERN);
}
synchronized static void loadModels(String oxmResourcesPattern, Pattern aai_oxm_file_pattern) throws Exception {
Resource[] resources = getResources(oxmResourcesPattern);
for (Resource resource : resources) {
Matcher matcher = aai_oxm_file_pattern.matcher(resource.getFilename());
if (matcher.matches()) {
try {
OxmModelLoader.loadModel(matcher.group(1), resource);
} catch (Exception e) {
LOGGER.error(OxmModelLoaderMsgs.OXM_LOAD_ERROR,
"Failed to load " + resource.getFilename() + ": " + e.getMessage());
throw new Exception("Failed to load schema");
}
}
}
}
private static Resource[] getResources(String oxmResourcesPattern) throws Exception {
ClassLoader cl = OxmModelLoader.class.getClassLoader();
ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(cl);
Resource[] resources = resolver.getResources(oxmResourcesPattern);
if (resources.length == 0) {
LOGGER.error(OxmModelLoaderMsgs.OXM_LOAD_ERROR, "No OXM schema files found on classpath");
throw new Exception("Failed to load schema");
}
return resources;
}
public static DynamicJAXBContext getContextForVersion(String version) throws Exception {
if (versionContextMap == null || versionContextMap.isEmpty()) {
loadModels();
} else if (!versionContextMap.containsKey(version)) {
String filename = OxmModelLoaderConstants.AaiUtils_HOME_MODEL + "aai_oxm_" + version + ".xml";
try {
loadModel(version, new File(filename));
} catch (Exception e) {
throw new FileNotFoundException(filename);
}
}
return versionContextMap.get(version);
}
public static Map<String, DynamicJAXBContext> getVersionContextMap() {
return Collections.unmodifiableMap(versionContextMap);
}
public static void setVersionContextMap(Map<String, DynamicJAXBContext> versionContextMap) {
OxmModelLoader.versionContextMap = versionContextMap;
}
private synchronized static void loadModel(String version, File file) throws JAXBException, IOException {
InputStream inputStream = new FileInputStream(file);
loadModel(version, file.getName(), inputStream);
}
private synchronized static void loadModel(String version, Resource resource) throws JAXBException, IOException {
InputStream inputStream = resource.getInputStream();
loadModel(version, resource.getFilename(), inputStream);
}
private synchronized static void loadModel(String version, String resourceName, InputStream inputStream)
throws JAXBException, IOException {
Map<String, Object> properties = new HashMap<>();
properties.put(JAXBContextProperties.OXM_METADATA_SOURCE, inputStream);
final DynamicJAXBContext jaxbContext = DynamicJAXBContextFactory
.createContextFromOXM(Thread.currentThread().getContextClassLoader(), properties);
versionContextMap.put(version, jaxbContext);
LOGGER.info(OxmModelLoaderMsgs.LOADED_OXM_FILE, resourceName);
}
}
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