1 files changed, 87 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/1.6-TUSCANY-3909/policy/src/main/java/org/apache/tuscany/sca/policy/util/PolicyHandlerDefinitionsLoader.java b/sca-java-1.x/tags/1.6-TUSCANY-3909/policy/src/main/java/org/apache/tuscany/sca/policy/util/PolicyHandlerDefinitionsLoader.java
new file mode 100644
index 0000000000..3a37ed3c41
--- /dev/null
+++ b/sca-java-1.x/tags/1.6-TUSCANY-3909/policy/src/main/java/org/apache/tuscany/sca/policy/util/PolicyHandlerDefinitionsLoader.java
@@ -0,0 +1,87 @@
+/*
+ * 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.policy.util;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Hashtable;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+
+/**
+ * Utility class for loading policy handler definitions from META-INF/services directories
+ *
+ * @version $Rev$ $Date$
+ */
+public class PolicyHandlerDefinitionsLoader {
+    
+    public static List<PolicyHandlerTuple> loadPolicyHandlerClassnames()  {
+        // Get the processor service declarations
+        Set<ServiceDeclaration> sds;
+        try {
+            sds = ServiceDiscovery.getInstance().getServiceDeclarations(PolicyHandler.class);
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+        
+        List<PolicyHandlerTuple> handlerTupleList = new ArrayList<PolicyHandlerTuple>();
+        
+        Map<Object, List<PolicyHandlerTuple>> handlerTuples = new Hashtable<Object, List<PolicyHandlerTuple>>();
+        for (ServiceDeclaration sd : sds) {
+            Map<String, String> attributes = sd.getAttributes();
+            String intentName = attributes.get("intent");
+            QName intentQName = getQName(intentName);
+            String policyModelClassName = attributes.get("model");
+            String appliesTo = attributes.get("appliesTo");
+            if ( appliesTo != null && !appliesTo.startsWith("/") ) {
+                appliesTo = "//" + appliesTo;
+            }
+            handlerTupleList.add(new PolicyHandlerTuple(sd, sd.getClassName(), intentQName, policyModelClassName, appliesTo));
+        }
+
+        return handlerTupleList;
+    }
+    
+    private static QName getQName(String qname) { 
+        if (qname == null) {
+            return null;
+        }
+        qname = qname.trim();
+        if (qname.startsWith("{")) {
+            int h = qname.indexOf('}');
+            if (h != -1) {
+                return new QName(qname.substring(1, h), qname.substring(h + 1));
+            }
+        } else {
+            int h = qname.indexOf('#');
+            if (h != -1) {
+                return new QName(qname.substring(0, h), qname.substring(h + 1));
+            }
+        }
+        throw new IllegalArgumentException("Invalid qname: " + qname);
+    }
+
+}