1 files changed, 234 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/impl/OSGiHelper.java b/sca-java-2.x/tags/2.0.1-RC1/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/impl/OSGiHelper.java
new file mode 100644
index 0000000000..460d291f53
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/impl/OSGiHelper.java
@@ -0,0 +1,234 @@
+/*
+ * 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.osgi.remoteserviceadmin.impl;
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashSet;
+import java.util.List;
+import java.util.UUID;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.implementation.osgi.OSGiImplementationFactory;
+import org.apache.tuscany.sca.implementation.osgi.OSGiProperty;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.Filter;
+import org.osgi.framework.InvalidSyntaxException;
+import org.osgi.framework.ServiceReference;
+
+/**
+ * 
+ */
+public class OSGiHelper {
+    public final static String FRAMEWORK_UUID = "org.osgi.framework.uuid";
+
+    private OSGiHelper() {
+    }
+
+    /**
+     * In OSGi, the value of String+ can be a single String, String[] or Collection<String>
+     * @param value
+     * @return
+     */
+    public static String[] getStringArray(Object value) {
+        if (value == null) {
+            return null;
+        }
+        if (value instanceof String) {
+            return new String[] {(String)value};
+        } else if (value instanceof Collection) {
+            Collection<String> collection = (Collection)value;
+            return collection.toArray(new String[collection.size()]);
+        }
+        return (String[])value;
+
+    }
+
+    public static Collection<String> getStringCollection(Object value) {
+        String[] values = getStringArray(value);
+        if (values == null) {
+            return null;
+        } else {
+            return Arrays.asList(values);
+        }
+    }
+
+    public static String[] getStringArray(ServiceReference serviceReference, String propertyName) {
+        Object propertyValue = serviceReference.getProperty(propertyName);
+        return getStringArray(propertyValue);
+    }
+
+    public static Collection<String> getStringCollection(ServiceReference serviceReference, String propertyName) {
+        Object propertyValue = serviceReference.getProperty(propertyName);
+        return getStringCollection(propertyValue);
+    }
+
+    public static Filter createFilter(BundleContext context, String filterValue) {
+        if (filterValue == null) {
+            return null;
+        }
+        try {
+            return context.createFilter(filterValue);
+        } catch (InvalidSyntaxException ex) {
+            throw new IllegalArgumentException("Invalid Filter: " + filterValue, ex);
+        }
+    }
+
+    /**
+     * Get a collection of resources that are configured by the given header
+     * @param bundle The bundle
+     * @param header 
+     * @param defaultValue
+     * @return
+     */
+    public static Collection<URL> getConfiguration(Bundle bundle, String header, String defaultValue) {
+        String value = (String)bundle.getHeaders().get(header);
+        if (value == null) {
+            return Collections.emptyList();
+        }
+        value = value.trim();
+        String paths[] = value.split("( |\t|\n|\r|\f|,)+");
+        if ("".equals(value) || paths.length == 0) {
+            if (defaultValue != null) {
+                paths = new String[] {defaultValue};
+            } else {
+                paths = new String[0];
+            }
+        }
+        Collection<URL> files = new HashSet<URL>();
+        for (String path : paths) {
+            if ("".equals(path)) {
+                // Skip empty ones
+                continue;
+            }
+            if (path.endsWith("/")) {
+                path = path + "*.xml";
+            }
+            if (!path.startsWith("/")) {
+                path = "/" + path;
+            }
+            int lastIndex = path.lastIndexOf('/');
+            String root = path.substring(0, lastIndex);
+            if ("".equals(root)) {
+                root = "/";
+            }
+            String pattern = path.substring(lastIndex + 1);
+            Enumeration<URL> entries = bundle.findEntries(root, pattern, false);
+            if (entries != null) {
+                while (entries.hasMoreElements()) {
+                    files.add(entries.nextElement());
+                }
+            }
+        }
+        return files;
+    }
+
+    public static Collection<OSGiProperty> getOSGiProperties(ExtensionPointRegistry registry, ServiceReference reference) {
+        FactoryExtensionPoint factoryExtensionPoint = registry.getExtensionPoint(FactoryExtensionPoint.class);
+        OSGiImplementationFactory implementationFactory =
+            factoryExtensionPoint.getFactory(OSGiImplementationFactory.class);
+        return implementationFactory.createOSGiProperties(reference);
+    }
+
+    public static OSGiProperty createOSGiProperty(ExtensionPointRegistry registry, String name, Object value) {
+        FactoryExtensionPoint factoryExtensionPoint = registry.getExtensionPoint(FactoryExtensionPoint.class);
+        OSGiImplementationFactory implementationFactory =
+            factoryExtensionPoint.getFactory(OSGiImplementationFactory.class);
+        return implementationFactory.createOSGiProperty(name, value);
+    }
+
+    public synchronized static String getFrameworkUUID(BundleContext bundleContext) {
+        String uuid = null;
+        if (bundleContext != null) {
+            uuid = bundleContext.getProperty(FRAMEWORK_UUID);
+        } else {
+            uuid = System.getProperty(FRAMEWORK_UUID);
+        }
+        if (uuid == null) {
+            uuid = UUID.randomUUID().toString();
+        }
+        System.setProperty(FRAMEWORK_UUID, uuid);
+        return uuid;
+    }
+
+    public static ClassLoader createBundleClassLoader(Bundle bundle) {
+        return new BundleClassLoader(bundle);
+    }
+
+    private static class BundleClassLoader extends ClassLoader {
+        private Bundle bundle;
+
+        public BundleClassLoader(Bundle bundle) {
+            super(null);
+            this.bundle = bundle;
+        }
+
+        @Override
+        protected Class<?> findClass(String name) throws ClassNotFoundException {
+            return bundle.loadClass(name);
+        }
+
+        @Override
+        protected URL findResource(String name) {
+            return bundle.getResource(name);
+        }
+
+        @Override
+        protected Enumeration<URL> findResources(String name) throws IOException {
+            Enumeration<URL> urls = bundle.getResources(name);
+            if (urls == null) {
+                List<URL> list = Collections.emptyList();
+                return Collections.enumeration(list);
+            } else {
+                return urls;
+            }
+        }
+    }
+
+    /**
+     * Find out what elements are added between the oldValues and newValues
+     * @param oldValues
+     * @param newValues
+     * @return
+     */
+    public static Collection<String> getAddedItems(Collection<String> oldValues, Collection<String> newValues) {
+        if (newValues == null) {
+            newValues = Collections.emptySet();
+        }
+
+        Collection<String> deltaInterest = new HashSet<String>(newValues);
+        if (oldValues == null) {
+            oldValues = Collections.emptySet();
+        }
+        deltaInterest.removeAll(oldValues);
+        return deltaInterest;
+    }
+
+    public static Collection<String> getRemovedItems(Collection<String> oldValues, Collection<String> newValues) {
+        return getAddedItems(newValues, oldValues);
+    }
+
+}