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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* Licensed 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.model.types.wsdl.impl;
import static org.objectweb.asm.Opcodes.ACC_ABSTRACT;
import static org.objectweb.asm.Opcodes.ACC_INTERFACE;
import static org.objectweb.asm.Opcodes.ACC_PUBLIC;
import static org.objectweb.asm.Opcodes.V1_5;
import java.util.ArrayList;
import java.util.List;
import javax.wsdl.Operation;
import javax.wsdl.Part;
import javax.wsdl.PortType;
import javax.xml.namespace.QName;
import org.apache.tuscany.common.resource.ResourceLoader;
import org.apache.tuscany.model.assembly.AssemblyContext;
import org.apache.tuscany.model.assembly.impl.ServiceContractImpl;
import org.apache.tuscany.model.types.wsdl.WSDLServiceContract;
import org.apache.tuscany.model.util.XMLNameUtil;
import org.apache.tuscany.sdo.util.SDOUtil;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Type;
import commonj.sdo.Property;
import commonj.sdo.helper.TypeHelper;
import commonj.sdo.helper.XSDHelper;
/**
* An implementation of WSDLServiceContract.
*/
public class WSDLServiceContractImpl extends ServiceContractImpl implements WSDLServiceContract {
private PortType portType;
private PortType callbackPortType;
private static final String[] EMPTY_STRINGS = new String[0];
/**
* Constructor
*/
public WSDLServiceContractImpl() {
}
public PortType getPortType() {
return portType;
}
public void setPortType(PortType portType) {
checkNotFrozen();
this.portType = portType;
}
public PortType getCallbackPortType() {
return callbackPortType;
}
public void setCallbackPortType(PortType portType) {
checkNotFrozen();
callbackPortType = portType;
}
/**
* @see org.apache.tuscany.model.assembly.impl.ExtensibleImpl#initialize(org.apache.tuscany.model.assembly.AssemblyContext)
*/
public void initialize(AssemblyContext modelContext) {
if (isInitialized())
return;
super.initialize(modelContext);
// Load the Java interface for the portType
if (portType != null && getInterface() == null) {
QName qname = portType.getQName();
String interfaceName = XMLNameUtil.getFullyQualifiedClassNameFromQName(qname.getNamespaceURI(), qname.getLocalPart());
Class<?> interfaceClass;
try {
// Load the interface
interfaceClass = modelContext.getApplicationResourceLoader().loadClass(interfaceName);
} catch (ClassNotFoundException e) {
// Generate the interface on the fly
interfaceClass = generateJavaInterface(modelContext.getTypeHelper(), modelContext.getApplicationResourceLoader(), portType, interfaceName);
}
super.setInterface(interfaceClass);
}
// Load the Java interface for the callback portType
if (callbackPortType != null && getCallbackInterface() == null) {
QName qname = callbackPortType.getQName();
String interfaceName = XMLNameUtil.getFullyQualifiedClassNameFromQName(qname.getNamespaceURI(), qname.getLocalPart());
Class<?> interfaceClass;
try {
// Load the interface
interfaceClass = modelContext.getApplicationResourceLoader().loadClass(interfaceName);
} catch (ClassNotFoundException e) {
// Generate the interface on the fly
interfaceClass = generateJavaInterface(modelContext.getTypeHelper(), modelContext.getApplicationResourceLoader(), portType, interfaceName);
}
super.setCallbackInterface(interfaceClass);
}
}
/**
* Generate a Java interface from a WSDL portType.
*
* @param portType
* @param interfaceName
* @return a Java interface that provides the same service contract as the WSDL portType
*/
@SuppressWarnings("unchecked")
private static Class<?> generateJavaInterface(TypeHelper typeHelper, ResourceLoader resourceLoader, PortType portType, String interfaceName) {
ClassLoader cl=Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(resourceLoader.getClassLoader());
// Create an XSD helper
XSDHelper xsdHelper = SDOUtil.createXSDHelper(typeHelper);
ClassWriter cw = new ClassWriter(false);
// Generate the interface
interfaceName = interfaceName.replace('.', '/');
cw.visit(V1_5, ACC_PUBLIC + ACC_ABSTRACT + ACC_INTERFACE, interfaceName, null, "java/lang/Object", EMPTY_STRINGS);
// Generate methods from the WSDL operations
for (Operation operation : (List<Operation>) portType.getOperations()) {
//FIXME Workaround for TUSCANY-170, we will need to make this consistent with the algorithm used by Axis2 WSDL2Java
// to generate method names from operations names
//String methodName = XMLNameUtil.getJavaNameFromXMLName(operation.getName(), false);
String methodName = operation.getName();
// FIXME later we may want to wwitch to use the Axis2 WSDL2Java (not to generate the Java source,
// just to figure the WSDL to Java mapping)
// Derive the method signature from the input message part (and check if it's a doc-wrapped or doc-bare operation)
List<Class> inputTypes=new ArrayList<Class>();
boolean wrapped = false;
if (operation.getInput() != null && operation.getInput().getMessage()!=null && !operation.getInput().getMessage().getParts().isEmpty()) {
QName qname=((Part)operation.getInput().getMessage().getParts().values().iterator().next()).getElementName();
if (qname!=null) {
Property property = xsdHelper.getGlobalProperty(qname.getNamespaceURI(), qname.getLocalPart(), true);
commonj.sdo.Type type = property.getType();
if (property.getName().equals(operation.getName())) {
String localName = xsdHelper.getLocalName(type);
if (localName.indexOf("_._")!=-1) {
for (Property param : (List<Property>)type.getProperties()) {
Class inputType = param.getType().getInstanceClass();
if (inputType == null)
inputType = Object.class;
inputTypes.add(inputType);
}
wrapped=true;
}
}
// Bare doc style
if (!wrapped) {
Class inputType = type.getInstanceClass();
if (inputType == null)
inputType = Object.class;
inputTypes.add(inputType);
}
} else {
// FIXME only support elements for now
}
}
// Derive the return type from the output message part (also support doc-wrapped and doc-bare here)
Class outputType=Void.class;
if (operation.getOutput() != null && operation.getOutput().getMessage()!=null && !operation.getOutput().getMessage().getParts().isEmpty()) {
QName qname=((Part)operation.getOutput().getMessage().getParts().values().iterator().next()).getElementName();
if (qname!=null) {
Property property = xsdHelper.getGlobalProperty(qname.getNamespaceURI(), qname.getLocalPart(), true);
commonj.sdo.Type type = property.getType();
if (wrapped) {
if (!type.getProperties().isEmpty()) {
outputType=((Property)type.getProperties().get(0)).getType().getInstanceClass();
if (outputType==null)
outputType=Object.class;
}
} else {
outputType = type.getInstanceClass();
if (outputType==null)
outputType=Object.class;
}
} else {
// FIXME only support elements for now
}
}
// FIXME integrate XSD to Java type mapping here
StringBuffer inputSignature=new StringBuffer();
for (Class inputType : inputTypes) {
inputSignature.append(Type.getDescriptor(inputType));
}
String outputSignature = Type.getDescriptor(outputType);
cw.visitMethod(ACC_PUBLIC + ACC_ABSTRACT, methodName, '(' + inputSignature.toString() + ')' + outputSignature, null, null).visitEnd();
}
// Generate the bytecodes
cw.visitEnd();
byte[] bytes = cw.toByteArray();
// Add the class to the resource loader
return resourceLoader.addClass(bytes);
} finally {
Thread.currentThread().setContextClassLoader(cl);
}
}
}
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