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/*******************************************************************************
* Copyright (c) 2004, 2010 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
* Ken Sueda - improvements
* Jevgeni Holodkov - improvements
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.core.externalization;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.mylyn.internal.tasks.core.ITasksCoreConstants;
import org.eclipse.mylyn.internal.tasks.core.ITransferList;
import org.eclipse.mylyn.internal.tasks.core.RepositoryModel;
import org.eclipse.mylyn.internal.tasks.core.XmlReaderUtil;
import org.eclipse.mylyn.tasks.core.AbstractTaskListMigrator;
import org.eclipse.mylyn.tasks.core.IRepositoryManager;
import org.w3c.dom.Document;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
/**
* @author Mik Kersten
* @author Rob Elves
*/
public class TaskListExternalizer {
private static final String ERROR_TASKLIST_READ = "Failed to load Task List"; //$NON-NLS-1$
private final RepositoryModel repositoryModel;
private final IRepositoryManager repositoryManager;
private Document orphanDocument;
public TaskListExternalizer(RepositoryModel repositoryModel, IRepositoryManager repositoryManager) {
this.repositoryModel = repositoryModel;
this.repositoryManager = repositoryManager;
}
public void initialize(List<AbstractTaskListMigrator> migrators) {
// TODO: Deprecate migration
}
public void writeTaskList(ITransferList taskList, File outFile) throws CoreException {
try (FileOutputStream outStream = new FileOutputStream(outFile)) {
try (ZipOutputStream zipOutStream = new ZipOutputStream(outStream)) {
ZipEntry zipEntry = new ZipEntry(ITasksCoreConstants.OLD_TASK_LIST_FILE);
zipOutStream.putNextEntry(zipEntry);
zipOutStream.setMethod(ZipOutputStream.DEFLATED);
SaxTaskListWriter writer = new SaxTaskListWriter();
writer.setOutputStream(zipOutStream);
writer.writeTaskListToStream(taskList, orphanDocument);
zipOutStream.flush();
zipOutStream.closeEntry();
zipOutStream.finish();
}
} catch (IOException e) {
throw new CoreException(new Status(IStatus.ERROR, ITasksCoreConstants.ID_PLUGIN, "Saving Task List failed", //$NON-NLS-1$
e));
}
}
public void readTaskList(ITransferList taskList, File inFile) throws CoreException {
if (!inFile.exists()) {
throw new CoreException(new Status(IStatus.ERROR, ITasksCoreConstants.ID_PLUGIN,
"Task list file not found \"" + inFile.getAbsolutePath() + "\"")); //$NON-NLS-1$ //$NON-NLS-2$
}
if (inFile.length() == 0) {
throw new CoreException(new Status(IStatus.ERROR, ITasksCoreConstants.ID_PLUGIN,
"Task list file contains no data \"" + inFile.getAbsolutePath() + "\"")); //$NON-NLS-1$ //$NON-NLS-2$
}
try (InputStream taskListFile = openTaskList(inFile)) {
XMLReader reader = XmlReaderUtil.createXmlReader();
SaxTaskListHandler handler = new SaxTaskListHandler(taskList, repositoryModel, repositoryManager);
reader.setContentHandler(handler);
reader.parse(new InputSource(taskListFile));
this.orphanDocument = handler.getOrphans();
} catch (SAXException | IOException e) {
throw new CoreException(new Status(IStatus.ERROR, ITasksCoreConstants.ID_PLUGIN, e.getMessage(), e));
}
}
/**
* Opens the specified XML file
*
* @throws CoreException
*/
private InputStream openTaskList(File inputFile) throws CoreException {
InputStream in = null;
try {
if (inputFile.getName().endsWith(ITasksCoreConstants.FILE_EXTENSION)) {
in = new ZipInputStream(new FileInputStream(inputFile));
ZipEntry entry = ((ZipInputStream) in).getNextEntry();
while (entry != null) {
if (ITasksCoreConstants.OLD_TASK_LIST_FILE.equals(entry.getName())) {
break;
}
entry = ((ZipInputStream) in).getNextEntry();
}
if (entry == null) {
throw new CoreException(new Status(IStatus.ERROR, ITasksCoreConstants.ID_PLUGIN,
"Task list file contains no entry for the task list")); //$NON-NLS-1$
}
} else {
in = new FileInputStream(inputFile);
}
return in;
} catch (Exception e) {
throw new CoreException(new Status(IStatus.ERROR, ITasksCoreConstants.ID_PLUGIN, ERROR_TASKLIST_READ, e));
}
}
}
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