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/*******************************************************************************
* Copyright (c) 2003, 2012 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.osgi.storage.url.reference;
import java.io.IOException;
import java.net.*;
/**
* URLStreamHandler for reference protocol. A reference URL is used to hold a
* reference to a local file URL. A reference URL allows bundles to be installed
* by reference. This means the content of the bundle will not be copied. Instead
* the content of the bundle will be loaded from the reference location specified
* by the reference URL. The Framework only supports reference URLs that refer
* to a local file URL. For example: <p>
* <pre>
* reference:file:/eclipse/plugins/org.eclipse.myplugin_1.0.0/
* reference:file:/eclispe/plugins/org.eclipse.mybundle_1.0.0.jar
* </pre>
*/
public class Handler extends URLStreamHandler {
private final String installPath;
public Handler(String installURL) {
super();
if (installURL != null && installURL.startsWith("file:")) { //$NON-NLS-1$
// this is the safest way to create a File object off a file: URL
this.installPath = installURL.substring(5);
} else {
this.installPath = null;
}
}
/**
* @throws IOException
*/
protected URLConnection openConnection(URL url) throws IOException {
return new ReferenceURLConnection(url, installPath);
}
protected void parseURL(URL url, String str, int start, int end) {
if (end < start) {
return;
}
String reference = (start < end) ? str.substring(start, end) : url.getPath();
setURL(url, url.getProtocol(), null, -1, null, null, reference, null, null);
}
}
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