1 files changed, 132 insertions, 0 deletions
diff --git a/sandbox/old/contrib/implementation-javascript/container/src/main/java/org/apache/tuscany/container/javascript/JavaScriptRefInvocInterceptor.java b/sandbox/old/contrib/implementation-javascript/container/src/main/java/org/apache/tuscany/container/javascript/JavaScriptRefInvocInterceptor.java
new file mode 100644
index 0000000000..f8c978f833
--- /dev/null
+++ b/sandbox/old/contrib/implementation-javascript/container/src/main/java/org/apache/tuscany/container/javascript/JavaScriptRefInvocInterceptor.java
@@ -0,0 +1,132 @@
+/*
+ * 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.container.javascript;
+
+import java.io.ByteArrayInputStream;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+
+import javax.xml.stream.XMLStreamReader;
+
+import org.apache.axiom.om.OMAbstractFactory;
+import org.apache.axiom.om.OMElement;
+import org.apache.axiom.om.impl.builder.StAXOMBuilder;
+import org.apache.axiom.om.util.StAXUtils;
+import org.apache.xmlbeans.XmlObject;
+import org.mozilla.javascript.Context;
+import org.mozilla.javascript.Scriptable;
+import org.mozilla.javascript.ScriptableObject;
+import org.mozilla.javascript.Wrapper;
+import org.mozilla.javascript.xml.XMLObject;
+
+/**
+ * This Interceptor encasulates the data mediation required  by the JavaScriptReferenceProxy.  The 
+ * invocation handler of this class traps the javascript reference calls, performs data mediation 
+ * and calls then calls the actual referred service.  This classes implementation is subject to 
+ * review and change when the DataMediation infrastructure of Tuscany is ready.
+ *
+ */
+public class JavaScriptRefInvocInterceptor implements InvocationHandler {
+    private Object actualProxy;
+
+    private Class wireInterface;
+
+    private Scriptable instanceScope;
+
+    JavaScriptRefInvocInterceptor(Object wireProxy, Class wireIfc, Scriptable instScope) {
+        this.actualProxy = wireProxy;
+        this.wireInterface = wireIfc;
+        this.instanceScope = instScope;
+    }
+
+    public Object invoke(Object arg0, Method method, Object[] args) throws Throwable {
+        // TODO Auto-generated method stub
+        Context cx = Context.enter();
+        try {
+            Method invokedMethod = getInvokedMethod(method.getName());
+            Object[] tranformedArgs = new Object[args.length];
+            for (int count = 0; count < args.length; ++count) {
+                tranformedArgs[count] = fromJavaScript(invokedMethod.getParameterTypes()[count], args[count]);
+            }
+
+            Object response = invokedMethod.invoke(actualProxy, tranformedArgs);
+            response = toJavaScript(response, instanceScope, cx);
+            return response;
+        } finally {
+            Context.exit();
+        }
+    }
+
+    private Method getInvokedMethod(String methodName) {
+        Method[] methods = wireInterface.getMethods();
+
+        for (int count = 0; count < methods.length; ++count) {
+            if (methods[count].getName().equals(methodName)) {
+                return methods[count];
+            }
+        }
+        throw new RuntimeException("Unable to find invocation method");
+    }
+
+    protected Object fromJavaScript(Class reqArgType, Object jsArg) throws Exception {
+        Object javaArg;
+        if (Context.getUndefinedValue().equals(jsArg)) {
+            javaArg = null;
+        } else if (jsArg instanceof XMLObject) {
+            // TODO: E4X Bug? Shouldn't need this copy, but without it the outer element gets lost???
+            Scriptable jsXML = (Scriptable) ScriptableObject.callMethod((Scriptable) jsArg, "copy", new Object[0]);
+            Wrapper wrapper = (Wrapper) ScriptableObject.callMethod(jsXML, "getXmlObject", new Object[0]);
+            javaArg = wrapper.unwrap();
+
+            XMLStreamReader xmlReader = StAXUtils.createXMLStreamReader(new ByteArrayInputStream(javaArg.toString().getBytes()));
+            StAXOMBuilder staxOMBuilder = new StAXOMBuilder(OMAbstractFactory.getOMFactory(), xmlReader);
+            javaArg = staxOMBuilder.getDocumentElement();
+        } else if (jsArg instanceof Wrapper) {
+            javaArg = ((Wrapper) jsArg).unwrap();
+        } else {
+            if (reqArgType != null) {
+                javaArg = Context.jsToJava(jsArg, reqArgType);
+            } else {
+                javaArg = Context.jsToJava(jsArg, String.class);
+            }
+        }
+
+        return javaArg;
+    }
+
+    protected Object toJavaScript(Object retVal, Scriptable scope, Context cx) throws RuntimeException {
+        Object jsRetVal;
+        if (retVal instanceof OMElement) {
+            try {
+                XmlObject xmlObject = XmlObject.Factory.parse(retVal.toString());
+                Object jsXML = cx.getWrapFactory().wrap(cx, scope, xmlObject, XmlObject.class);
+                jsRetVal = cx.newObject(scope, "XML", new Object[] { jsXML });
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        } else if (retVal instanceof XmlObject) {
+            Object jsXML = cx.getWrapFactory().wrap(cx, scope, (XmlObject) retVal, XmlObject.class);
+            jsRetVal = cx.newObject(scope, "XML", new Object[] { jsXML });
+        } else {
+            jsRetVal = Context.toObject(retVal, scope);
+        }
+
+        return jsRetVal;
+    }
+}