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Micro Distribution of the Payara Project for IBM JDK
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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
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 * holder.
 */

package com.sun.ejb.codegen;


import java.lang.reflect.Method;
import java.util.List;
import java.util.ArrayList;
import java.util.LinkedList;

import static org.glassfish.pfl.dynamic.codegen.spi.Wrapper.*;
import org.glassfish.pfl.dynamic.codegen.spi.Type ;

import java.util.logging.Logger;

import javax.jws.WebMethod;

import static java.lang.reflect.Modifier.*;

import com.sun.enterprise.util.LocalStringManagerImpl;
import com.sun.logging.LogDomains;

/**
 * This class is responsible for generating the SEI when it is not packaged 
 * by the application. 
 *
 * @author Jerome Dochez
 */
public class ServiceInterfaceGenerator extends Generator 
    implements ClassGeneratorFactory {

    private static LocalStringManagerImpl localStrings =
	    new LocalStringManagerImpl(ServiceInterfaceGenerator.class);
    private static Logger _logger=null;
    static{
       _logger=LogDomains.getLogger(ServiceInterfaceGenerator.class, LogDomains.DPL_LOGGER);
    }
 
    Class sib=null;
    String serviceIntfName;
    String packageName;
    String serviceIntfSimpleName;
    Method[] intfMethods;
    
   /**
     * Construct the Wrapper generator with the specified deployment
     * descriptor and class loader.
     * @exception GeneratorException.
     */
    public ServiceInterfaceGenerator(ClassLoader cl, Class sib) 
	    throws GeneratorException, ClassNotFoundException
    {
	    super();

        this.sib = sib;
        serviceIntfSimpleName = getServiceIntfName();

	    packageName = getPackageName();
        serviceIntfName = packageName + "." + serviceIntfSimpleName;
	
        intfMethods = calculateMethods(sib, removeDups(sib.getMethods()));
        
        // NOTE : no need to remove ejb object methods because EJBObject
        // is only visible through the RemoteHome view.
    }    
    
    public String getServiceIntfName() {
        String serviceIntfSimpleName = sib.getSimpleName();
        if (serviceIntfSimpleName.endsWith("EJB")) {
            return serviceIntfSimpleName.substring(0, serviceIntfSimpleName.length()-3);
        } else {
            return serviceIntfSimpleName+"SEI";
        }
    }
    
    public String getPackageName() {
        return sib.getPackage().getName()+".internal.jaxws";
    }
    
    /**
     * Get the fully qualified name of the generated class.
     * Note: the remote/local implementation class is in the same package 
     * as the bean class, NOT the remote/local interface.
     * @return the name of the generated class.
     */
    public String getGeneratedClass() {
        return serviceIntfName;
    }

    // For corba codegen infrastructure
    public String className() {
        return getGeneratedClass();
    }
    
    private Method[] calculateMethods(Class sib, Method[] initialList) {

        // we start by assuming the @WebMethod was NOT used on this class
        boolean webMethodAnnotationUsed = false;
        List list = new ArrayList();
        
        for (Method m : initialList) {
            WebMethod wm = m.getAnnotation(WebMethod.class);
            if ( (wm != null) && !webMethodAnnotationUsed) {
                webMethodAnnotationUsed=true;
                // reset the list, this is the first annotated method we find
                list.clear();
            }
            if (wm!=null) {
                list.add(m);
            } else {
                if (!webMethodAnnotationUsed && !m.getDeclaringClass().equals(java.lang.Object.class)) {
                    list.add(m);
                }
            }
        }
        return list.toArray(new Method[list.size()]);
    }

    public void evaluate() {

        _clear();

	    if (packageName != null) {
	        _package(packageName);
        }

        _interface(PUBLIC, serviceIntfSimpleName);

        for(int i = 0; i < intfMethods.length; i++) {
	        printMethod(intfMethods[i]);
	    }

        _end();

        return;

    }


    private void printMethod(Method m)
    {

        boolean throwsRemoteException = false;
        List exceptionList = new LinkedList();
	    for(Class exception : m.getExceptionTypes()) {
            exceptionList.add(Type.type(exception));
            if( exception.getName().equals("java.rmi.RemoteException") ) {
                throwsRemoteException = true;
            }
	}
        if( !throwsRemoteException ) {
            exceptionList.add(_t("java.rmi.RemoteException"));
        }

        _method( PUBLIC | ABSTRACT, Type.type(m.getReturnType()),
                 m.getName(), exceptionList);

        int i = 0;

        for(Class param : m.getParameterTypes()) {
            _arg(Type.type(param), "param" + i);
            i++;
	    }

        _end();
    }
    
}