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/*******************************************************************************
* Copyright (c) 2004, 2008 Tasktop Technologies and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Tasktop Technologies - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.core;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collection;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamResult;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.mylyn.commons.core.StatusHandler;
import org.eclipse.mylyn.tasks.core.TaskRepository;
import org.xml.sax.ContentHandler;
import org.xml.sax.DTDHandler;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.AttributesImpl;
/**
* Adapted from SaxContextWriter
*
* @author Rob Elves
*/
public class SaxRepositoriesWriter {
private OutputStream outputStream;
public void setOutputStream(OutputStream outputStream) {
this.outputStream = outputStream;
}
public void writeRepositoriesToStream(Collection<TaskRepository> repositories) throws IOException {
if (outputStream == null) {
IOException ioe = new IOException("OutputStream not set");
throw ioe;
}
try {
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.transform(
new SAXSource(new RepositoriesWriter(), new TaskRepositoriesInputSource(repositories)),
new StreamResult(outputStream));
} catch (TransformerException e) {
StatusHandler.log(new Status(IStatus.ERROR, ITasksCoreConstants.ID_PLUGIN, "Could not write repositories",
e));
throw new IOException(e.getMessage());
}
}
private static class TaskRepositoriesInputSource extends InputSource {
private final Collection<TaskRepository> repositories;
public TaskRepositoriesInputSource(Collection<TaskRepository> repositories) {
this.repositories = repositories;
}
public Collection<TaskRepository> getRepositories() {
return this.repositories;
}
}
private static class RepositoriesWriter implements XMLReader {
// private static final String ELEMENT_TASK_REPOSITORIES = "TaskRepositories";
//
// public static final String ELEMENT_TASK_REPOSITORY = "TaskRepository";
//
// private static final String ATTRIBUTE_VERSION = "xmlVersion";
// private static final String ATTRIBUTE_URL = "Url";
//
// private static final String ATTRIBUTE_KIND = "Kind";
private ContentHandler handler;
private ErrorHandler errorHandler;
public boolean getFeature(String name) throws SAXNotRecognizedException, SAXNotSupportedException {
return false;
}
public void setFeature(String name, boolean value) throws SAXNotRecognizedException, SAXNotSupportedException {
}
public Object getProperty(String name) throws SAXNotRecognizedException, SAXNotSupportedException {
return null;
}
public void setProperty(String name, Object value) throws SAXNotRecognizedException, SAXNotSupportedException {
}
public void setEntityResolver(EntityResolver resolver) {
}
public EntityResolver getEntityResolver() {
return null;
}
public void setDTDHandler(DTDHandler handler) {
}
public DTDHandler getDTDHandler() {
return null;
}
public void setContentHandler(ContentHandler handler) {
this.handler = handler;
}
public ContentHandler getContentHandler() {
return handler;
}
public void setErrorHandler(ErrorHandler handler) {
this.errorHandler = handler;
}
public ErrorHandler getErrorHandler() {
return errorHandler;
}
@SuppressWarnings( { "deprecation", "restriction" })
public void parse(InputSource input) throws IOException, SAXException {
if (!(input instanceof TaskRepositoriesInputSource)) {
throw new SAXException("Can only parse writable input sources");
}
Collection<TaskRepository> repositories = ((TaskRepositoriesInputSource) input).getRepositories();
handler.startDocument();
AttributesImpl rootAttributes = new AttributesImpl();
rootAttributes.addAttribute("", TaskRepositoriesExternalizer.ATTRIBUTE_VERSION,
TaskRepositoriesExternalizer.ATTRIBUTE_VERSION, "", "1");
handler.startElement("", TaskRepositoriesExternalizer.ELEMENT_TASK_REPOSITORIES,
TaskRepositoriesExternalizer.ELEMENT_TASK_REPOSITORIES, rootAttributes);
for (TaskRepository repository : new ArrayList<TaskRepository>(repositories)) {
AttributesImpl ieAttributes = new AttributesImpl();
for (String key : repository.getProperties().keySet()) {
ieAttributes.addAttribute(
"",
key,
key,
"",
org.eclipse.mylyn.internal.commons.core.XmlStringConverter.convertToXmlString(repository.getProperties()
.get(key)));
}
handler.startElement("", TaskRepositoriesExternalizer.ELEMENT_TASK_REPOSITORY,
TaskRepositoriesExternalizer.ELEMENT_TASK_REPOSITORY, ieAttributes);
handler.endElement("", TaskRepositoriesExternalizer.ELEMENT_TASK_REPOSITORY,
TaskRepositoriesExternalizer.ELEMENT_TASK_REPOSITORY);
}
handler.endElement("", TaskRepositoriesExternalizer.ELEMENT_TASK_REPOSITORIES,
TaskRepositoriesExternalizer.ELEMENT_TASK_REPOSITORIES);
handler.endDocument();
}
public void parse(String systemId) throws IOException, SAXException {
throw new SAXException("Can only parse writable input sources");
}
}
}
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