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/*******************************************************************************
* Copyright (c) 2002-2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM - Initial API and implementation
*******************************************************************************/
package org.eclipse.wst.wsi.internal.core.wsdl.traversal;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.HashMap;
import java.util.Map;
import javax.wsdl.Binding;
import javax.wsdl.BindingFault;
import javax.wsdl.BindingInput;
import javax.wsdl.BindingOperation;
import javax.wsdl.BindingOutput;
import javax.wsdl.Definition;
import javax.wsdl.Fault;
import javax.wsdl.Import;
import javax.wsdl.Input;
import javax.wsdl.Message;
import javax.wsdl.Operation;
import javax.wsdl.Output;
import javax.wsdl.Part;
import javax.wsdl.Port;
import javax.wsdl.PortType;
import javax.wsdl.Service;
import javax.wsdl.Types;
import javax.wsdl.extensions.ExtensibilityElement;
import javax.wsdl.extensions.soap.SOAPBinding;
import javax.wsdl.extensions.soap.SOAPBody;
import javax.wsdl.extensions.soap.SOAPFault;
import javax.wsdl.extensions.soap.SOAPHeader;
import javax.wsdl.extensions.soap.SOAPHeaderFault;
import javax.wsdl.extensions.soap.SOAPOperation;
import org.w3c.dom.Element;
/**
* The class adapts the given object with the implemented
* <code>WSDLVisitor</code> methods.
*
* @author Kulik
*/
public class VisitorAdaptor implements InvocationHandler
{
// optimization hint
static final private Class[] visitorClass = new Class[] { WSDLVisitor.class };
/**
* The array is used for determination of actual javax.wsdl class
*/
private static Class[] wsdl =
new Class[] {
Part.class,
Service.class,
Types.class,
Operation.class,
Input.class,
Output.class,
Fault.class,
Binding.class,
BindingOperation.class,
BindingInput.class,
BindingOutput.class,
BindingFault.class,
Import.class,
Element.class,
Message.class,
Port.class,
PortType.class,
Definition.class,
ExtensibilityElement.class,
SOAPBinding.class,
SOAPBody.class,
SOAPHeader.class,
SOAPHeaderFault.class,
SOAPFault.class,
SOAPOperation.class };
final private Object visitor;
private Map methods = new HashMap();
/**
* Constructor.
* @param o a visitor object.
*/
private VisitorAdaptor(Object o)
{
this.visitor = o;
}
/**
* Adds method to method binding.
* @param wsdlMethod a WSDL method.
* @param targetMethod a target method.
*/
private void addMethodBinding(Method wsdlMethod, Method targetMethod)
{
methods.put(wsdlMethod, targetMethod);
}
/**
* The method proxies all "visit(XXX)" methods to the corresponding
* "visit(XXX)" methods of the target visitor object.
* @see java.lang.reflect.InvocationHandler#invoke(Object, Method, Object[])
*/
public Object invoke(Object proxy, Method m, Object[] params)
{
try
{
Method target = (Method) methods.get(m);
// assert target != null
return target.invoke(visitor, params);
}
catch (Throwable t)
{
t.printStackTrace();
}
return null;
}
/**
* The method extract the short class name.
* @param c a class.
* @return the short class name.
*/
static private String getName(Class c)
{
if (c != null)
{
String name = c.getName();
return name.substring(name.lastIndexOf(".") + 1);
}
return null;
}
/**
* The method generates proxy for the given visitor.
* Proxy redirects all visit(XXX) callback to the implemented in visitor
* object.
* @param visitor a vistor object.
* @return a proxy for the given visitor.
*/
public static WSDLTraversal adapt(Object visitor)
{
WSDLTraversal traversal = new WSDLTraversal();
if (visitor == null)
throw new IllegalArgumentException("Visitor object can not be NULL");
VisitorAdaptor adaptor = new VisitorAdaptor(visitor);
// check whether methods are implemented
// get real class of the object
Class c = visitor.getClass();
// iterates through wsdl artifacts and looking for
// void visit(XXX) implemented methods.
for (int i = 0; i < wsdl.length; i++)
try
{
// if method is not found the exception will be thrown
Method m =
c.getMethod(
"visit",
new Class[] { wsdl[i], Object.class, WSDLTraversalContext.class });
// register binding WSDLVisitor method -> target visitor method
adaptor.addMethodBinding(
WSDLVisitor.class.getMethod(
"visit",
new Class[] { wsdl[i], Object.class, WSDLTraversalContext.class }),
m);
// register visitXXX in WSDLTraversalBuilder
m =
WSDLTraversal.class.getMethod(
"visit" + getName(wsdl[i]),
new Class[] { boolean.class });
m.invoke(traversal, new Object[] { Boolean.TRUE });
}
catch (Exception e)
{
}
// construct the WSDLVisitor by using java.lang.reflect.Proxy
ClassLoader loader = Thread.currentThread().getContextClassLoader();
WSDLVisitor wsdlVisitor =
(WSDLVisitor) Proxy.newProxyInstance(loader, visitorClass, adaptor);
// traverse WSDL document
traversal.setVisitor(wsdlVisitor);
return traversal;
}
}
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