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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 org.apache.tuscany.sca.node.util;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
/**
* Utility methods to find an SCA contribution from a class or a resource.
*
* @version $Rev$ $Date$
*/
public class SCAContributionUtil {
/**
* Given a class this method finds the contribution that it belongs to.
* This could be either a local directory of a jar file.
*
* @param clazz
* @return the contribution URL
* @throws MalformedURLException
*/
public static URL findContributionFromClass(Class<?> clazz) throws MalformedURLException {
return findContributionFromResource(clazz.getClassLoader(), clazz.getName().replace('.', '/') + ".class");
}
/**
* Given the path to a resource this method finds the contribution that it belongs to
* this could be either a local directory of a jar file.
*
* @param classLoader
* @param compositeString
* @return the contribution URL
* @throws MalformedURLException
*/
public static URL findContributionFromResource(ClassLoader classLoader, String compositeString) throws MalformedURLException {
URL contributionURL = classLoader.getResource(compositeString);
if ( contributionURL != null ){
String contributionURLString = contributionURL.toExternalForm();
String protocol = contributionURL.getProtocol();
if ("file".equals(protocol)) {
// directory contribution
if (contributionURLString.endsWith(compositeString)) {
String location = contributionURLString.substring(0, contributionURLString.lastIndexOf(compositeString));
// workaround from evil URL/URI form Maven
contributionURL = toFile(new URL(location)).toURI().toURL();
}
} else if ("jar".equals(protocol)) {
// jar contribution
String location = contributionURLString.substring(4, contributionURLString.lastIndexOf("!/"));
// workaround for evil URL/URI from Maven
contributionURL = toFile(new URL(location)).toURI().toURL();
}
}
return contributionURL;
}
/**
* Convert from a <code>URL</code> to a <code>File</code>.
* <p>
* From version 1.1 this method will decode the URL. Syntax such as
* <code>file:///my%20docs/file.txt</code> will be correctly decoded to
* <code>/my docs/file.txt</code>.
*
* @param url the file URL to convert, null returns null
* @return the equivalent <code>File</code> object, or <code>null</code>
* if the URL's protocol is not <code>file</code>
* @throws IllegalArgumentException if the file is incorrectly encoded
*/
private static File toFile(URL url) {
if (url == null || !url.getProtocol().equals("file")) {
return null;
} else {
String filename = url.getFile().replace('/', File.separatorChar);
int pos = 0;
while ((pos = filename.indexOf('%', pos)) >= 0) { // NOPMD
if (pos + 2 < filename.length()) {
String hexStr = filename.substring(pos + 1, pos + 3);
char ch = (char)Integer.parseInt(hexStr, 16);
filename = filename.substring(0, pos) + ch + filename.substring(pos + 3);
}
}
return new File(filename);
}
}
}
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