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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package libcore.net.url;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
public class JarHandler extends URLStreamHandler {
/**
* Returns a connection to the jar file pointed by this <code>URL</code>
* in the file system
*
* @return java.net.URLConnection A connection to the resource pointed by
* this url.
* @param u
* java.net.URL The URL to which the connection is pointing to
*
* @throws IOException
* thrown if an IO error occurs when this method tries to
* establish connection.
*/
@Override
protected URLConnection openConnection(URL u) throws IOException {
return new JarURLConnectionImpl(u);
}
/**
*
* @param url
* URL the context URL
* @param spec
* java.lang.String the spec string
* @param start
* int the location to start parsing from
* @param limit
* int the location where parsing ends
*/
@Override
protected void parseURL(URL url, String spec, int start, int limit) {
String file = url.getFile();
if (file == null) {
file = "";
}
if (limit > start) {
spec = spec.substring(start, limit);
} else {
spec = "";
}
if (spec.indexOf("!/") == -1 && (file.indexOf("!/") == -1)) {
throw new NullPointerException("Cannot find \"!/\"");
}
if (file.isEmpty()) {
file = spec;
} else if (spec.charAt(0) == '/') {
file = file.substring(0, file.indexOf('!') + 1) + spec;
} else {
int idx = file.indexOf('!');
String tmpFile = file.substring(idx + 1, file.lastIndexOf('/') + 1) + spec;
tmpFile = UrlUtils.canonicalizePath(tmpFile, true);
file = file.substring(0, idx + 1) + tmpFile;
}
try {
// check that the embedded url is valid
new URL(file);
} catch (MalformedURLException e) {
throw new NullPointerException(e.toString());
}
setURL(url, "jar", "", -1, null, null, file, null, null);
}
/**
* Build and return the externalized string representation of url.
*
* @return String the externalized string representation of url
* @param url
* a URL
*/
@Override
protected String toExternalForm(URL url) {
StringBuilder sb = new StringBuilder();
sb.append("jar:");
sb.append(url.getFile());
String ref = url.getRef();
if (ref != null) {
sb.append(ref);
}
return sb.toString();
}
}
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