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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;
import java.io.IOException;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import org.oasisopen.sca.ServiceRuntimeException;
/**
* ContributionLocationHelper
*
* @version $Rev$ $Date$
*/
public class ContributionLocationHelper {
/**
* Returns the location of the SCA contribution containing the given class.
*
* @param anchorClass
* @return
*/
public static String getContributionLocation(final Class<?> anchorClass) {
URL url = AccessController.doPrivileged(new PrivilegedAction<URL>() {
public URL run() {
return anchorClass.getProtectionDomain().getCodeSource().getLocation();
}
});
String uri = url.toString();
return uri;
}
/**
* Find the contribution location by seraching a resource on the classpath
* @param resourceName
* @return
*/
public static String getContributionLocation(String resourceName) {
return getContributionLocation(null, resourceName);
}
/**
* Find the contribution locations by seraching a resource on the classpath
* @param resourceName
* @return
*/
public static List<String> getContributionLocations(String resourceName) {
return getContributionLocations(null, resourceName);
}
/**
* Find the contribution location by seraching a resource using the given classloader
* @param classLoader
* @param resourceName
* @return
*/
public static String getContributionLocation(ClassLoader classLoader, String resourceName) {
if (classLoader == null) {
classLoader = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
public ClassLoader run() {
return Thread.currentThread().getContextClassLoader();
}
});
}
URL resourceURL = getResource(classLoader, resourceName);
if (resourceURL == null) {
return null;
}
return getRootLocation(resourceURL, resourceName);
}
/**
* Find the contribution locations by seraching a resource using the given classloader
* @param classLoader The classloader that is used to call getResources()
* @param resourceName The name of the resource
* @return A list of locations that contain the resource
*/
public static List<String> getContributionLocations(ClassLoader classLoader, String resourceName) {
if (classLoader == null) {
classLoader = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
public ClassLoader run() {
return Thread.currentThread().getContextClassLoader();
}
});
}
Enumeration<URL> resourceURLs = getResources(classLoader, resourceName);
List<String> locations = new ArrayList<String>();
while (resourceURLs != null && resourceURLs.hasMoreElements()) {
locations.add(getRootLocation(resourceURLs.nextElement(), resourceName));
}
return locations;
}
private static String getRootLocation(URL resourceURL, String resourceName) {
String location = null;
// "jar:file://....../something.jar!/a/b/c/app.composite"
String url = resourceURL.toExternalForm();
String protocol = resourceURL.getProtocol();
if ("file".equals(protocol)) {
// directory contribution
if (url.endsWith(resourceName)) {
location = url.substring(0, url.lastIndexOf(resourceName));
}
} else if ("jar".equals(protocol) || "wsjar".equals(protocol) || "zip".equals(protocol)) {
// jar contribution
location = url.substring(protocol.length() + 1, url.lastIndexOf("!/"));
} else if (url.endsWith(resourceName)) {
location = url.substring(0, url.lastIndexOf(resourceName));
} else {
throw new IllegalArgumentException("The root of the resource cannot be determined: " + resourceURL
+ ","
+ resourceName);
}
return location;
}
private static URL getResource(final ClassLoader classLoader, final String compositeURI) {
return AccessController.doPrivileged(new PrivilegedAction<URL>() {
public URL run() {
return classLoader.getResource(compositeURI);
}
});
}
private static Enumeration<URL> getResources(final ClassLoader classLoader, final String compositeURI) {
return AccessController.doPrivileged(new PrivilegedAction<Enumeration<URL>>() {
public Enumeration<URL> run() {
try {
return classLoader.getResources(compositeURI);
} catch (IOException e) {
throw new ServiceRuntimeException(e);
}
}
});
}
}
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