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/*******************************************************************************
* Copyright (c) 2005, 2010 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
* Rob Harrop - SpringSource Inc. (bug 253942)
*******************************************************************************/
package org.eclipse.osgi.baseadaptor.bundlefile;
import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.zip.ZipEntry;
/**
* A BundleEntry represented by a ZipEntry in a ZipFile. The ZipBundleEntry
* class is used for bundles that are installed as a ZipFile on a file system.
* @since 3.2
*/
public class ZipBundleEntry extends BundleEntry {
/**
* ZipEntry for this entry.
*/
protected final ZipEntry zipEntry;
/**
* The BundleFile for this entry.
*/
protected final ZipBundleFile bundleFile;
/**
* Constructs the BundleEntry using a ZipEntry.
* @param bundleFile BundleFile object this entry is a member of
* @param zipEntry ZipEntry object of this entry
*/
ZipBundleEntry(ZipEntry zipEntry, ZipBundleFile bundleFile) {
this.zipEntry = zipEntry;
this.bundleFile = bundleFile;
}
/**
* Return an InputStream for the entry.
*
* @return InputStream for the entry
* @exception java.io.IOException
*/
public InputStream getInputStream() throws IOException {
ZipBundleFile zipBundleFile = bundleFile;
if (!zipBundleFile.isMruEnabled())
return bundleFile.getZipFile().getInputStream(zipEntry);
zipBundleFile.incrementReference();
InputStream result = null;
try {
return result = new ZipBundleEntryInputStream(zipBundleFile.getZipFile().getInputStream(zipEntry));
} finally {
if (result == null)
// an exception occurred; decrement the reference
zipBundleFile.decrementReference();
}
}
/**
* Return size of the uncompressed entry.
*
* @return size of entry
*/
public long getSize() {
return zipEntry.getSize();
}
/**
* Return name of the entry.
*
* @return name of entry
*/
public String getName() {
return zipEntry.getName();
}
/**
* Get the modification time for this BundleEntry.
* <p>If the modification time has not been set,
* this method will return <tt>-1</tt>.
*
* @return last modification time.
*/
public long getTime() {
return zipEntry.getTime();
}
@SuppressWarnings("deprecation")
public URL getLocalURL() {
try {
return new URL("jar:" + bundleFile.basefile.toURL() + "!/" + zipEntry.getName()); //$NON-NLS-1$//$NON-NLS-2$
} catch (MalformedURLException e) {
//This can not happen.
return null;
}
}
@SuppressWarnings("deprecation")
public URL getFileURL() {
try {
File file = bundleFile.getFile(zipEntry.getName(), false);
if (file != null)
return file.toURL();
} catch (MalformedURLException e) {
//This can not happen.
}
return null;
}
private class ZipBundleEntryInputStream extends InputStream {
private final InputStream stream;
private boolean closed = false;
public ZipBundleEntryInputStream(InputStream stream) {
this.stream = stream;
}
public int available() throws IOException {
return stream.available();
}
public void close() throws IOException {
try {
stream.close();
} finally {
synchronized (this) {
if (closed)
return;
closed = true;
}
bundleFile.decrementReference();
}
}
public void mark(int var0) {
stream.mark(var0);
}
public boolean markSupported() {
return stream.markSupported();
}
public int read() throws IOException {
return stream.read();
}
public int read(byte[] var0, int var1, int var2) throws IOException {
return stream.read(var0, var1, var2);
}
public int read(byte[] var0) throws IOException {
return stream.read(var0);
}
public void reset() throws IOException {
stream.reset();
}
public long skip(long var0) throws IOException {
return stream.skip(var0);
}
}
}
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