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/*******************************************************************************
* Copyright (c) 2012 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.tcf.filesystem.core.internal.operations;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.InvocationTargetException;
import java.net.URL;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.osgi.util.NLS;
import org.eclipse.tcf.te.tcf.filesystem.core.model.FSTreeNode;
import org.eclipse.tcf.te.tcf.filesystem.core.nls.Messages;
/**
* The operation class that download a file node to a specified output stream.
*/
public class OpOutStreamOp extends OpStreamOp {
// The output stream to write to.
private OutputStream output;
// The file node to download from.
private FSTreeNode node;
/**
* Create an operation instance to download the specified file to the specified
* output stream.
*
* @param node The file to be downloaded.
* @param output The output stream to write to.
*/
public OpOutStreamOp(FSTreeNode node, OutputStream output) {
this.node = node;
this.output = output;
}
/*
* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.filesystem.core.internal.operations.Operation#run(org.eclipse.core.runtime.IProgressMonitor)
*/
@Override
public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
super.run(monitor);
InputStream input = null;
// Open the input stream of the node using the tcf stream protocol.
try {
URL url = node.getLocationURL();
InputStream in = url.openStream();
input = new BufferedInputStream(in);
// The buffer used to download the file.
byte[] data = new byte[DEFAULT_CHUNK_SIZE];
// Calculate the chunk size of one percent.
int chunk_size = (int) node.attr.size / 100;
// Total size displayed on the progress dialog.
String total_size = formatSize(node.attr.size);
int percentRead = 0;
long bytesRead = 0;
int length;
while ((length = input.read(data)) >= 0 && !monitor.isCanceled()) {
output.write(data, 0, length);
output.flush();
bytesRead += length;
if (chunk_size != 0) {
int percent = (int) bytesRead / chunk_size;
if (percent != percentRead) { // Update the progress.
monitor.worked(percent - percentRead);
percentRead = percent; // Remember the percentage.
// Report the progress.
monitor.subTask(NLS.bind(Messages.OpOutStreamOp_DownloadingProgress, formatSize(bytesRead), total_size));
}
}
}
if(monitor.isCanceled()) throw new InterruptedException();
}
catch (IOException e) {
throw new InvocationTargetException(e);
}
finally {
if (input != null) {
try {
input.close();
}
catch (Exception e) {
}
}
monitor.done();
}
}
}
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