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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017 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.
* ============LICENSE_END=========================================================
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*/
package org.onap.aai.introspection;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import org.eclipse.persistence.dynamic.DynamicType;
import org.eclipse.persistence.jaxb.JAXBContextProperties;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContextFactory;
import org.onap.aai.util.AAIConstants;
import javax.xml.bind.JAXBException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ModelInjestor {
private Map<Version, DynamicJAXBContext> versionContextMap = new HashMap<>();
private static final Pattern classNamePattern = Pattern.compile("\\.(v\\d+)\\.");
private static final Pattern uriPattern = Pattern.compile("(v\\d+)\\/");
private static final EELFLogger LOGGER = EELFManager.getInstance().getLogger(ModelInjestor.class);
/**
* Instantiates a new model injestor.
*/
private ModelInjestor() {
try {
injestModels();
} catch (FileNotFoundException | JAXBException e) {
throw new RuntimeException(e);
}
}
private static class Helper {
private static final ModelInjestor INSTANCE = new ModelInjestor();
}
/**
* Gets the single instance of ModelInjestor.
*
* @return single instance of ModelInjestor
*/
public synchronized static ModelInjestor getInstance() {
return Helper.INSTANCE;
}
/**
* Injest models.
*
* @throws FileNotFoundException the file not found exception
* @throws JAXBException the JAXB exception
*/
private void injestModels() throws FileNotFoundException, JAXBException {
for (Version version : Version.values()) {
this.injestModel(version);
}
}
/**
* Injest model.
*
* @param version the version
* @throws JAXBException the JAXB exception
* @throws FileNotFoundException the file not found exception
*/
private void injestModel (Version version) throws JAXBException, FileNotFoundException {
String fileName = this.getOXMFileName(version);
File oxmFile = new File(AAIConstants.AAI_HOME_ETC + fileName);
// Check if the file exists on the path and if it doesn't exist then
// Using classloader makes it easy to have a different oxm file
// for unit testing the oxm files otherwise, you will be
// stuck with using the main oxm for even the testing
InputStream iStream;
if(oxmFile.exists()){
LOGGER.info("Oxm file exists on the system {}", oxmFile);
iStream = new FileInputStream(oxmFile);
} else {
LOGGER.warn("Unable to find oxm file {} on the system so using classloader", oxmFile);
iStream = getClass().getClassLoader().getResourceAsStream(fileName);
}
Map<String, Object> properties = new HashMap<String, Object>();
properties.put(JAXBContextProperties.OXM_METADATA_SOURCE, iStream);
final DynamicJAXBContext jaxbContext = DynamicJAXBContextFactory.createContextFromOXM(this.getClass().getClassLoader(), properties);
versionContextMap.put(version, jaxbContext);
}
/**
* Gets the version from class name.
*
* @param classname the classname
* @return the version from class name
*/
public Version getVersionFromClassName (String classname) {
Matcher m = classNamePattern.matcher(classname);
String version = "v12";
if (m.find()) {
version = m.group(1);
}
return Version.valueOf(version);
}
/**
* Gets the context for URI.
*
* @param uri the uri
* @return the context for URI
*/
public DynamicJAXBContext getContextForURI(String uri) {
DynamicJAXBContext result = null;
Matcher m = uriPattern.matcher(uri);
Version version = null;
if (m.find()) {
version = Version.valueOf(m.group(1));
result = versionContextMap.get(version);
}
return result;
}
/**
* Gets the context for version.
*
* @param version the version
* @return the context for version
*/
public DynamicJAXBContext getContextForVersion(Version version) {
DynamicJAXBContext result = null;
result = versionContextMap.get(version);
return result;
}
/**
* Gets the dynamic type for class name.
*
* @param classname the classname
* @return the dynamic type for class name
*/
public DynamicType getDynamicTypeForClassName(String classname) {
DynamicType result = null;
DynamicJAXBContext context = null;
Version version = this.getVersionFromClassName(classname);
context = versionContextMap.get(version);
if (context != null) {
result = context.getDynamicType(classname);
}
return result;
}
public String getOXMFileName(Version v) {
// Changed the /oxm/aai_oxm_*.xml to oxm/aai_oxm_*.xml
// Modified to load from input stream using getClass().getClassLoader()
// As this will be able to relatively get the oxm if the oxm file is there
// So if there is a src/main/resources/oxm/ and src/test/resources/oxm, the
// test oxm will end up being used for tests and src oxm for source files
// Don't change this unless you understand the details specified
return "oxm/aai_oxm_" + v.toString() + ".xml";
}
}
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