1 files changed, 110 insertions, 0 deletions
diff --git a/sandbox/lresende/das/api/src/main/java/org/apache/tuscany/das/service/ServiceLoader.java b/sandbox/lresende/das/api/src/main/java/org/apache/tuscany/das/service/ServiceLoader.java
new file mode 100644
index 0000000000..34466778df
--- /dev/null
+++ b/sandbox/lresende/das/api/src/main/java/org/apache/tuscany/das/service/ServiceLoader.java
@@ -0,0 +1,110 @@
+/*
+ * 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.das.service;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.util.Enumeration;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * This class loads services present in the class path.
+ */
+public class ServiceLoader {
+
+     private static Map providerMap = new java.util.Hashtable();
+
+     public static synchronized Iterator providers(Class cls) {
+         ClassLoader cl = cls.getClassLoader();
+         // null if loaded by bootstrap class loader
+         if (cl == null) {
+             cl = ClassLoader.getSystemClassLoader();
+         }
+         String serviceFile = "META-INF/services/" + cls.getName();
+
+         // log.debug("File: " + serviceFile);
+
+         List lst = (List)providerMap.get(serviceFile);
+         if (lst != null) {
+             return lst.iterator();
+         }
+
+         lst = new java.util.Vector();
+         providerMap.put(serviceFile, lst);
+
+         Enumeration e;
+         try {
+             e = cl.getResources(serviceFile);
+         } catch (IOException ioe) {
+             return lst.iterator();
+         }
+
+         while (e.hasMoreElements()) {
+             try {
+                 java.net.URL u = (java.net.URL)e.nextElement();
+                 //log.debug("URL: " + u);
+
+                 InputStream is = u.openStream();
+                 Reader r = new InputStreamReader(is, "UTF-8");
+                 BufferedReader br = new BufferedReader(r);
+
+                 String line = br.readLine();
+                 while (line != null) {
+                     try {
+                         // First strip any comment...
+                         int idx = line.indexOf('#');
+                         if (idx != -1) {
+                             line = line.substring(0, idx);
+                         }
+
+                         // Trim whitespace.
+                         line = line.trim();
+
+                         // If nothing left then loop around...
+                         if (line.length() == 0) {
+                             line = br.readLine();
+                             continue;
+                         }
+                         // log.debug("Line: " + line);
+
+                         // Try and load the class
+                         // Object obj = cl.loadClass(line).newInstance();
+                         // stick it into our vector...
+                         lst.add(line);
+                     } catch (Exception ex) {
+                         // Just try the next line
+                     }
+
+                     line = br.readLine();
+                 }
+             } catch (Exception ex) {
+                 // Just try the next file...
+             }
+
+         }
+         return lst.iterator();
+     }
+
+ }