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authorlresende <lresende@13f79535-47bb-0310-9956-ffa450edef68>2009-11-11 23:13:23 +0000
committerlresende <lresende@13f79535-47bb-0310-9956-ffa450edef68>2009-11-11 23:13:23 +0000
commit6d0e93c68d3aeaeb4bb6d96ac0460eec40ef786e (patch)
treea956ed510e14a5509b8ef49fae42cfd439629825 /branches/sca-java-M2/sca/services/containers/container.javascript/src/main/java/org/apache/tuscany/container/javascript/JavaScriptRefInvocInterceptor.java
parent3ac2d800d840f03618fc364090d786effde84b1f (diff)
Moving 1.x branches
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@835143 13f79535-47bb-0310-9956-ffa450edef68
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diff --git a/branches/sca-java-M2/sca/services/containers/container.javascript/src/main/java/org/apache/tuscany/container/javascript/JavaScriptRefInvocInterceptor.java b/branches/sca-java-M2/sca/services/containers/container.javascript/src/main/java/org/apache/tuscany/container/javascript/JavaScriptRefInvocInterceptor.java
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-/*
- * 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;
- }
-}