1 files changed, 160 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/node-api/src/main/java/org/apache/tuscany/sca/node/ContributionLocationHelper.java b/sca-java-2.x/tags/2.0.1-RC1/modules/node-api/src/main/java/org/apache/tuscany/sca/node/ContributionLocationHelper.java
new file mode 100644
index 0000000000..2e73322917
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/node-api/src/main/java/org/apache/tuscany/sca/node/ContributionLocationHelper.java
@@ -0,0 +1,160 @@
+/*
+ * 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);
+                }
+            }
+        });
+    }
+
+}