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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.net.URL;
 import java.util.List;
 
ContributionLocationHelper

Version:
$Rev: 794909 $ $Date: 2009-07-17 02:51:45 +0300 (Fri, 17 Jul 2009) $
 
 public class ContributionLocationHelper {

    
Returns the location of the SCA contribution containing the given class.

Parameters:
anchorClass
Returns:
 
     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

Parameters:
resourceName
Returns:
 
     public static String getContributionLocation(String resourceName) {
         return getContributionLocation(nullresourceName);
     }

    
Find the contribution locations by seraching a resource on the classpath

Parameters:
resourceName
Returns:
 
     public static List<StringgetContributionLocations(String resourceName) {
         return getContributionLocations(nullresourceName);
 
     }

    
Find the contribution location by seraching a resource using the given classloader

Parameters:
classLoader
resourceName
Returns:
 
     public static String getContributionLocation(ClassLoader classLoaderString resourceName) {
         if (classLoader == null) {
             classLoader = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
                 public ClassLoader run() {
                     return Thread.currentThread().getContextClassLoader();
                 }
             });
         }
         URL resourceURL = getResource(classLoaderresourceName);
         if (resourceURL == null) {
             return null;
         }
         return getRootLocation(resourceURLresourceName);
     }

    
Find the contribution locations by seraching a resource using the given classloader

Parameters:
classLoader The classloader that is used to call getResources()
resourceName The name of the resource
Returns:
A list of locations that contain the resource
    public static List<StringgetContributionLocations(ClassLoader classLoaderString resourceName) {
        if (classLoader == null) {
            classLoader = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
                public ClassLoader run() {
                    return Thread.currentThread().getContextClassLoader();
                }
            });
        }
        Enumeration<URLresourceURLs = getResources(classLoaderresourceName);
        List<Stringlocations = new ArrayList<String>();
        while (resourceURLs != null && resourceURLs.hasMoreElements()) {
            locations.add(getRootLocation(resourceURLs.nextElement(), resourceName));
        }
        return locations;
    }
    private static String getRootLocation(URL resourceURLString 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 classLoaderfinal String compositeURI) {
        return AccessController.doPrivileged(new PrivilegedAction<URL>() {
            public URL run() {
                return classLoader.getResource(compositeURI);
            }
        });
    }
    private static Enumeration<URLgetResources(final ClassLoader classLoaderfinal String compositeURI) {
        return AccessController.doPrivileged(new PrivilegedAction<Enumeration<URL>>() {
            public Enumeration<URLrun() {
                try {
                    return classLoader.getResources(compositeURI);
                } catch (IOException e) {
                    throw new ServiceRuntimeException(e);
                }
            }
        });
    }
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