1 files changed, 173 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/WSPolicyBuilder.java b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/WSPolicyBuilder.java
new file mode 100644
index 0000000000..d6bd710ed9
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/WSPolicyBuilder.java
@@ -0,0 +1,173 @@
+/*
+ * 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.wspolicy;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+
+import org.apache.neethi.Policy;
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.Endpoint;
+import org.apache.tuscany.sca.assembly.EndpointReference;
+import org.apache.tuscany.sca.assembly.Implementation;
+import org.apache.tuscany.sca.assembly.builder.BuilderContext;
+import org.apache.tuscany.sca.assembly.builder.PolicyBuilder;
+import org.apache.tuscany.sca.policy.PolicyExpression;
+import org.apache.tuscany.sca.policy.PolicySet;
+import org.apache.tuscany.sca.policy.PolicySubject;
+
+/**
+ * Processing for WS-Policy objects
+ * TBD
+ */
+public class WSPolicyBuilder implements PolicyBuilder<Policy> {
+
+    public boolean build(Endpoint endpoint, BuilderContext context) {
+        List<WSPolicy> polices = getPolicies(endpoint);
+        System.out.println(endpoint + ": " + polices);
+        return true;
+    }
+
+    public boolean build(EndpointReference endpointReference, BuilderContext context) {
+        List<WSPolicy> polices = getPolicies(endpointReference);
+        System.out.println(endpointReference + ": " + polices);
+        return true;
+    }
+
+    public boolean build(Component component, Implementation implementation, BuilderContext context) {
+        List<WSPolicy> polices = getPolicies(implementation);
+        System.out.println(implementation + ": " + polices);
+        return true;
+    }
+
+    public QName getPolicyType() {
+        return WSPolicy.WS_POLICY_QNAME;
+    }
+    
+    public List<QName> getSupportedBindings() {
+        return null;
+    }    
+
+    public boolean build(EndpointReference endpointReference, Endpoint endpoint, BuilderContext context) {
+        
+        // TODO - neethi doesn't include code for matching ws policy 
+        //        cxf have the class Intersector http://svn.apache.org/repos/asf/cxf/trunk/api/src/main/java/org/apache/cxf/ws/policy/Intersector.java
+        //        but this does its work based on the cxf AssertionBuilders and extension
+        //        registry mechanism. I don't want to commit to that at the moment. 
+        //       
+        //        At the moment we do the simplest top level QName based matching
+               
+        // match EPR policy sets 
+        for (PolicySet eprPolicySet : endpointReference.getPolicySets()){
+            for (PolicySet epPolicySet : endpoint.getPolicySets()){
+                if (!build(eprPolicySet, epPolicySet)){
+                    return false;
+                }
+            }
+        }
+        
+        // match EP policy sets 
+        for (PolicySet epPolicySet : endpoint.getPolicySets()){
+            for (PolicySet eprPolicySet : endpointReference.getPolicySets()){
+                if (!build(epPolicySet, eprPolicySet)){
+                    return false;
+                }
+            }
+        }        
+        
+        return true;
+    }   
+    
+    private boolean build(PolicySet policySet1, PolicySet policySet2){
+        
+        // extract the ws policy expressions out of the policy sets
+        List<PolicyExpression> policyExpressions1 = new ArrayList<PolicyExpression>();
+        List<PolicyExpression> policyExpressions2 = new ArrayList<PolicyExpression>();
+        
+        for (PolicyExpression policyExpression : policySet1.getPolicies()){
+            if (policyExpression.getName().equals(getPolicyType())){
+                policyExpressions1.add(policyExpression);
+            }
+        }
+        
+        for (PolicyExpression policyExpression : policySet2.getPolicies()){
+            if (policyExpression.getName().equals(getPolicyType())){
+                policyExpressions2.add(policyExpression);
+            }
+        }
+        
+        // Match the first set of expressions against the second set
+        for (PolicyExpression policyExpression1 : policyExpressions1){
+            for (PolicyExpression policyExpression2 : policyExpressions2){
+                if (!build((WSPolicy)policyExpression1.getPolicy(), 
+                           (WSPolicy)policyExpression2.getPolicy())){
+                    return false;
+                }
+            }
+        }
+        
+        // TODO set the reference policy set to include an interception of the
+        //      ws policy sets discovered here
+        //      Do we really need to do this?
+        //      The method is called in both directions (reference to service and
+        //      service to reference) so would need to fix that
+        
+        return true;
+    }
+    
+    private List<WSPolicy> getPolicies(PolicySubject subject) {
+        List<WSPolicy> polices = new ArrayList<WSPolicy>();
+        for (PolicySet ps : subject.getPolicySets()) {
+            for (PolicyExpression exp : ps.getPolicies()) {
+                if (getPolicyType().equals(exp.getName())) {
+                    polices.add((WSPolicy)exp.getPolicy());
+                }
+            }
+        }
+        return polices;
+    }    
+    
+    private boolean build(WSPolicy wsPolicy1, WSPolicy wsPolicy2){
+        // TODO - cheating here as we assume a flat policy structure
+        //        we've read all the policy assertions into Tuscany models
+        //        in the reader (without taking account of alternatives)
+        //        so we just compare those here
+        //        The real implementation of this comparison depends on how
+        //        we decide to represent the ws policy hierarchy
+        
+        for (Object policyAssertion1 : wsPolicy1.getPolicyAssertions()){
+            boolean matched = false;
+            for (Object policyAssertion2 : wsPolicy2.getPolicyAssertions()){
+                if (policyAssertion1.getClass() == policyAssertion2.getClass()){
+                    matched = true;
+                    break;
+                }
+            }
+            if(!matched){
+                return false;
+            }
+        }
+        
+        return true;
+    }
+
+}