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/*******************************************************************************
* Copyright (c) 2008, 2011 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.p2.persistence;
import java.io.*;
import java.net.URL;
import org.eclipse.core.runtime.*;
import org.eclipse.equinox.internal.p2.core.Activator;
import org.eclipse.equinox.internal.p2.core.helpers.LogHelper;
import org.eclipse.equinox.p2.core.ProvisionException;
import org.eclipse.osgi.util.NLS;
/**
* This class reads and writes repository metadata (e.g. table of contents files)
* for composite artifact and metadata repositories.
* <p>
* Note: This class is not used for reading or writing the actual composite repositories.
*/
public class CompositeRepositoryIO {
/**
* Writes the given repository to the stream.
* This method performs buffering, and closes the stream when finished.
*/
public void write(CompositeRepositoryState repository, OutputStream output, String type) {
OutputStream bufferedOutput = null;
try {
try {
bufferedOutput = new BufferedOutputStream(output);
CompositeWriter repositoryWriter = new CompositeWriter(bufferedOutput, type);
repositoryWriter.write(repository);
} finally {
if (bufferedOutput != null) {
bufferedOutput.close();
}
}
} catch (IOException ioe) {
// TODO shouldn't this throw a core exception?
ioe.printStackTrace();
}
}
/**
* Reads the composite repository from the given stream,
* and returns the contained array of abstract composite repositories.
*
* This method performs buffering, and closes the stream when finished.
*/
public CompositeRepositoryState read(URL location, InputStream input, String type, IProgressMonitor monitor) throws ProvisionException {
BufferedInputStream bufferedInput = null;
try {
try {
bufferedInput = new BufferedInputStream(input);
CompositeParser repositoryParser = new CompositeParser(Activator.getContext(), Activator.ID, type);
repositoryParser.setErrorContext(location.toExternalForm());
repositoryParser.parse(input);
IStatus result = repositoryParser.getStatus();
switch (result.getSeverity()) {
case IStatus.CANCEL :
throw new OperationCanceledException();
case IStatus.ERROR :
throw new ProvisionException(result);
case IStatus.WARNING :
case IStatus.INFO :
LogHelper.log(result);
}
CompositeRepositoryState repositoryState = repositoryParser.getRepositoryState();
if (repositoryState == null)
throw new ProvisionException(new Status(IStatus.ERROR, Activator.ID, ProvisionException.REPOSITORY_FAILED_READ, Messages.io_parseError, null));
return repositoryState;
} finally {
if (bufferedInput != null)
bufferedInput.close();
}
} catch (IOException ioe) {
String msg = NLS.bind(Messages.io_failedRead, location);
throw new ProvisionException(new Status(IStatus.ERROR, Activator.ID, ProvisionException.REPOSITORY_FAILED_READ, msg, ioe));
}
}
}
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