1 files changed, 135 insertions, 0 deletions
diff --git a/tags/java/sca/2.0-M4-RC1/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/impl/OSGiHelper.java b/tags/java/sca/2.0-M4-RC1/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/impl/OSGiHelper.java
new file mode 100644
index 0000000000..d5a2b7aa95
--- /dev/null
+++ b/tags/java/sca/2.0-M4-RC1/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/impl/OSGiHelper.java
@@ -0,0 +1,135 @@
+/*
+ * 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.net.URL;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashSet;
+
+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 {
+    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();
+        }
+        String paths[] = value.trim().split("( |\t|\n|\r|\f|,)+");
+        if (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 (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;
+    }
+
+}