1 files changed, 190 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/xml/WSPolicyProcessor.java b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/xml/WSPolicyProcessor.java
new file mode 100644
index 0000000000..cbc234bc47
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/policy-wspolicy/src/main/java/org/apache/tuscany/sca/policy/wspolicy/xml/WSPolicyProcessor.java
@@ -0,0 +1,190 @@
+/*
+ * 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.xml;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLOutputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.axiom.om.OMElement;
+import org.apache.axiom.om.impl.builder.StAXOMBuilder;
+import org.apache.neethi.Constants;
+import org.apache.neethi.PolicyComponent;
+import org.apache.neethi.PolicyEngine;
+import org.apache.neethi.PolicyOperator;
+import org.apache.tuscany.sca.common.xml.stax.reader.XMLDocumentStreamReader;
+import org.apache.tuscany.sca.contribution.processor.BaseStAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
+import org.apache.tuscany.sca.contribution.processor.ContributionResolveException;
+import org.apache.tuscany.sca.contribution.processor.ContributionWriteException;
+import org.apache.tuscany.sca.contribution.processor.ProcessorContext;
+import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
+import org.apache.tuscany.sca.contribution.processor.StAXAttributeProcessor;
+import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.core.FactoryExtensionPoint;
+import org.apache.tuscany.sca.policy.wspolicy.WSPolicy;
+
+/**
+ * Processor for handling xml models of PolicySet definitions
+ *
+ * @version $Rev$ $Date$
+ */
+public class WSPolicyProcessor extends BaseStAXArtifactProcessor implements
+    StAXArtifactProcessor<WSPolicy> {
+    
+    protected ExtensionPointRegistry registry;
+    protected StAXArtifactProcessor<Object> extensionProcessor;
+    protected StAXAttributeProcessor<Object> extensionAttributeProcessor;
+    protected XMLInputFactory inputFactory;
+    protected XMLOutputFactory outputFactory;
+
+    public WSPolicyProcessor(ExtensionPointRegistry registry,
+                             StAXArtifactProcessor extensionProcessor,
+                             StAXAttributeProcessor extensionAttributeProcessor) {
+        this.registry = registry;
+        this.extensionProcessor = extensionProcessor;
+        this.extensionAttributeProcessor = extensionAttributeProcessor;
+        
+        FactoryExtensionPoint modelFactories = registry.getExtensionPoint(FactoryExtensionPoint.class);
+        this.inputFactory = modelFactories.getFactory(XMLInputFactory.class);
+        this.outputFactory = modelFactories.getFactory(XMLOutputFactory.class);
+    }
+
+    public QName getArtifactType() {
+        return WSPolicy.WS_POLICY_QNAME;
+    }
+
+    public Class<WSPolicy> getModelType() {
+        return WSPolicy.class;
+    }
+
+    public WSPolicy read(XMLStreamReader reader, ProcessorContext context)
+        throws ContributionReadException, XMLStreamException {
+        org.apache.neethi.Policy neethiPolicy = null;
+        XMLDocumentStreamReader doc = new XMLDocumentStreamReader(reader);
+        StAXOMBuilder builder = new StAXOMBuilder(doc);
+        OMElement element = builder.getDocumentElement();
+        neethiPolicy = PolicyEngine.getPolicy(element);
+        
+        WSPolicy wsPolicy = new WSPolicy();
+        wsPolicy.setNeethiPolicy(neethiPolicy);
+        
+        // normalize the neethi tree so we can easily identify
+        // the policy alternatives
+/*  Messes up the hierarchy if rampart config policies included      
+        try {
+            neethiPolicy.normalize(true);
+        } catch (UnsupportedOperationException ex){
+            // RampartConfig policies don't support this yet
+        }
+*/        
+        
+        // top-level children of ExactlyOne are policy alternatives so
+        // for each child create a policy model list and pull the 
+        // policies out
+        for(Object alternative : neethiPolicy.getPolicyComponents()) {
+            List<Object> assertions = new ArrayList<Object>();
+            readPolicyAssertions(assertions, (PolicyComponent)alternative, context);
+            wsPolicy.getPolicyAssertions().add(assertions);
+        }
+               
+        
+        return wsPolicy;
+    }
+    
+    private void readPolicyAssertions(List<Object> policyAssertions, PolicyComponent policyComponent, ProcessorContext context){
+        
+        // recurse into the policy alternatives
+        // TODO - lots of todos here as this just walks down the neethi hierarchy
+        //        looking for assertions to drive Tuscany processors without
+        //        regard to the policy alternatives. Undecided about whether to 
+        //        commit to prepresenting this hierarchy in Tuscany or whether
+        //        to rely on neethi
+        // Should this be in the builder? Not really as this drives the 
+        // Tuscany specific readers
+        if (policyComponent.getType() != Constants.TYPE_ASSERTION){
+            PolicyOperator policyOperator = (PolicyOperator)policyComponent;
+            for(Object childComponent : policyOperator.getPolicyComponents()){
+                // TODO - create assertion hierarchy in wsPolicy model
+                //        how we do this depends on if we continue to use neethi
+                readPolicyAssertions(policyAssertions, (PolicyComponent)childComponent, context);
+            }
+        } else {
+            try {
+                // TODO - not sure we should keep the neethi model but hack for the
+                //        time being to get Tuscany processors to process the OMElements
+                //        within the neethi model
+                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+                XMLStreamWriter writer = outputFactory.createXMLStreamWriter(outputStream);
+                
+                policyComponent.serialize(writer);
+                writer.flush();
+                writer.close();
+                outputStream.flush();
+                outputStream.close();
+                
+                ByteArrayInputStream inputStream = new ByteArrayInputStream(outputStream.toByteArray());
+                XMLStreamReader reader = inputFactory.createXMLStreamReader(inputStream);
+
+                Object neethiAssertion = policyComponent;
+                Object tuscanyAssertion = extensionProcessor.read(reader, context);
+                
+                if (tuscanyAssertion != null) {
+                    policyAssertions.add(tuscanyAssertion);
+                } else {
+                    // add neethi assertion
+                    policyAssertions.add(neethiAssertion);
+                }
+            } catch (Exception ex) {
+                // TODO - report the error properly
+                ex.printStackTrace();
+            }
+        }
+    }
+
+    public void write(WSPolicy wsPolicy, XMLStreamWriter writer, ProcessorContext context)
+        throws ContributionWriteException, XMLStreamException {
+
+        // Write an <sca:policySet>
+        writer.writeStartElement(WSPolicy.WS_POLICY_NS, WSPolicy.WS_POLICY);
+
+        if (wsPolicy != null) {
+            wsPolicy.getNeethiPolicy().serialize(writer);
+        }
+
+        writer.writeEndElement();
+    }
+
+    public void resolve(WSPolicy wsPolicy, ModelResolver resolver, ProcessorContext context)
+        throws ContributionResolveException {
+        
+        // resolve policy assertions
+    }
+
+}