/**
* Squidy Interaction Library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
*
* Squidy Interaction Library is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Squidy Interaction Library. If not, see
* <http://www.gnu.org/licenses/>.
*
* 2009 Human-Computer Interaction Group, University of Konstanz.
* <http://hci.uni-konstanz.de>
*
* Please contact info@squidy-lib.de or visit our website
* <http://www.squidy-lib.de> for further information.
*/
package org.squidy.designer.model;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.ValidationEvent;
import javax.xml.bind.ValidationEventHandler;
import javax.xml.bind.ValidationEventLocator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.squidy.SquidyException;
import org.squidy.common.dynamiccode.DynamicCodeClassLoader;
import org.squidy.common.util.ReflectionUtil;
import org.squidy.manager.data.Processor;
import org.squidy.manager.model.Node;
import org.squidy.manager.model.Pipe;
import org.squidy.manager.model.Pipeline;
import org.squidy.manager.model.Workspace;
import org.squidy.manager.scanner.PackageScanner;
/**
* <code>ModelViewHandler</code>.
*
* <pre>
* Date: Feb 21, 2009
* Time: 11:34:09 PM
* </pre>
*
* @author
* Roman Rädle<br />
* <a href="mailto:Roman.Raedle@uni-konstanz.de">Roman.Raedle@uni-konstanz.de</a><br />
* Human-Computer Interaction Group<br />
* University of Konstanz
*
* @version $Id: ModelViewHandler.java 772 2011-09-16 15:39:44Z raedle $
* @since 1.0.0
*/
public class ModelViewHandler {
// Logger to log info, error, debug,... messages.
private static final Log LOG = LogFactory.getLog(ModelViewHandler.class);
private static ModelViewHandler instance;
/**
* Singleton pattern.
*
* @return Single instance of diagram model parser.
*/
public static ModelViewHandler getModelViewHandler() {
if (instance == null) {
instance = new ModelViewHandler();
}
return instance;
}
/**
* Use singleton pattern.
*/
protected ModelViewHandler() {
}
private static JAXBContext context;
/**
* Initializes the JAXB context with all required classes.
*
* @return The initialized JAXB context.
* @throws JAXBException
* The exception will be thrown if initialization of the JAXB
* context has been failed.
*/
protected JAXBContext getContext() throws JAXBException {
if (context != null) {
return context;
}
ClassLoader classLoader = DynamicCodeClassLoader.DYNAMIC_CODE;
return context = JAXBContext.newInstance(ReflectionUtil.loadContextClasses(Thread.currentThread().getContextClassLoader(), PackageScanner.findAllClassNamesWithAnnotation(Processor.class), Data.class, WorkspaceShape.class, Workspace.class, PipelineShape.class, Pipeline.class, NodeShape.class, Node.class, PipeShape.class, Pipe.class, LayerDemoShape.class));
}
public static void resetJAXBContext(Class<?> type) {
// TODO [RR]: This is a DIRTY hack!
// PackageScanner.CLASS_CACHE.clear();
if (!PackageScanner.CLASS_CACHE.contains(type)) {
PackageScanner.CLASS_CACHE.add(type);
}
String[] classes = PackageScanner.findAllClassNamesWithAnnotation(Processor.class);
List<String> only = new ArrayList<String>();
for (String className : classes) {
if (!type.getName().equals(className)) {
only.add(className);
System.out.println("IN: " + className);
}
else {
System.out.println("REMOVED: " + className);
}
}
try {
context = null;
ClassLoader classLoader = DynamicCodeClassLoader.DYNAMIC_CODE;
context = JAXBContext.newInstance(ReflectionUtil.loadContextClasses(classLoader, only.toArray(new String[0]), type, Data.class, WorkspaceShape.class, Workspace.class, PipelineShape.class, Pipeline.class, NodeShape.class, Node.class, PipeShape.class, Pipe.class, LayerDemoShape.class));
}
catch (JAXBException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* Parses a given input stream (should contain model and diagram code as xml
* structure) and returns it as an object structure.
*
* @param inputStream
* The input stream should contain model and diagram structure.
* @return The parsed XMI document containing model and diagram in object
* representation.
* @throws SquidyException
*/
public Data load(InputStream inputStream) throws SquidyException {
try {
Unmarshaller unmarshaller = getContext().createUnmarshaller();
unmarshaller.setEventHandler(new ValidationEventHandler() {
/* (non-Javadoc)
* @see javax.xml.bind.ValidationEventHandler#handleEvent(javax.xml.bind.ValidationEvent)
*/
public boolean handleEvent(ValidationEvent e) {
ValidationEventLocator locator = e.getLocator();
if (LOG.isErrorEnabled()) {
LOG.error("Error while reading input stream: \"" + e.getMessage() + "\" [line=" + locator.getLineNumber() + ", column=" + locator.getColumnNumber() + "]");
}
return true;
}
});
return (Data) unmarshaller.unmarshal(inputStream);
} catch (JAXBException e) {
throw new SquidyException("Could not unmarshal input stream.", e);
}
}
/**
* @param outputStream
* @param xmi
*/
public void save(OutputStream outputStream, Data data) {
try {
Marshaller marshaller = getContext().createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
// marshaller.setProperty("com.sun.xml.bind.namespacePrefixMapper", new DefaultNamespacePrefixMapper());
marshaller.marshal(data, outputStream);
} catch (JAXBException e) {
throw new SquidyException("Could not marshal data.", e);
}
}
}