/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.ejb.gen;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import com.caucho.config.ConfigException;
import com.caucho.config.gen.ApiClass;
import com.caucho.config.gen.ApiMethod;
import com.caucho.config.gen.BusinessMethodGenerator;
import com.caucho.config.gen.View;
import com.caucho.java.JavaWriter;
import com.caucho.util.L10N;
/**
* Represents a public interface to a singleton bean, e.g. a singleton view
*/
public class SingletonView extends View {
private static final L10N L = new L10N(SingletonView.class);
private SingletonGenerator _sessionBean;
private ArrayList<BusinessMethodGenerator> _businessMethods
= new ArrayList<BusinessMethodGenerator>();
public SingletonView(SingletonGenerator bean, ApiClass api)
{
super(bean, api);
_sessionBean = bean;
}
public SingletonGenerator getSessionBean()
{
return _sessionBean;
}
public String getContextClassName()
{
return getSessionBean().getClassName();
}
/**
* True if the implementation is a proxy, i.e. an interface stub which
* calls an instance class.
*/
public boolean isProxy()
{
return ! getViewClass().equals(getBeanClass());
}
public String getViewClassName()
{
return getViewClass().getSimpleName() + "__LocalProxy";
}
public String getBeanClassName()
{
return getViewClass().getSimpleName() + "__Bean";
}
/**
* Returns the introspected methods
*/
public ArrayList<? extends BusinessMethodGenerator> getMethods()
{
return _businessMethods;
}
/**
* Introspects the APIs methods, producing a business method for
* each.
*/
@Override
public void introspect()
{
ApiClass apiClass = getViewClass();
for (ApiMethod apiMethod : apiClass.getMethods()) {
Method javaMethod = apiMethod.getJavaMember();
if (javaMethod.getDeclaringClass().equals(Object.class))
continue;
if (javaMethod.getDeclaringClass().getName().startsWith("javax.ejb.")
&& ! apiMethod.getName().equals("remove"))
continue;
if (apiMethod.getName().startsWith("ejb")) {
throw new ConfigException(L.l("{0}: '{1}' must not start with 'ejb'. The EJB spec reserves all methods starting with ejb.",
javaMethod.getDeclaringClass(),
apiMethod.getName()));
}
int index = _businessMethods.size();
BusinessMethodGenerator bizMethod = createMethod(apiMethod, index);
if (bizMethod != null) {
bizMethod.introspect(bizMethod.getApiMethod(),
bizMethod.getImplMethod());
_businessMethods.add(bizMethod);
}
}
}
/**
* Generates code to create the provider
*/
public void generateCreateProvider(JavaWriter out, String var)
throws IOException
{
out.println();
out.println("if (" + var + " == " + getViewClass().getName() + ".class)");
out.println(" return new " + getViewClassName() + "(getServer(), true);");
}
/**
* Generates the view code.
*/
public void generate(JavaWriter out)
throws IOException
{
generateBean(out);
out.println();
out.println("public static class " + getViewClassName());
if (isProxy()) {
generateExtends(out);
out.print(" implements SingletonProxyFactory, ");
out.println(getViewClass().getName());
}
else {
out.println(" extends " + getBeanClass().getName());
out.println(" implements SingletonProxyFactory");
}
out.println("{");
out.pushDepth();
generateClassContent(out);
out.popDepth();
out.println("}");
}
/**
* Generates the view code.
*/
public void generateBean(JavaWriter out)
throws IOException
{
out.println();
out.println("public static class " + getBeanClassName());
out.println(" extends " + getBeanClass().getName());
out.println("{");
out.pushDepth();
out.println("private transient " + getViewClassName() + " _context;");
HashMap<String,Object> map = new HashMap<String,Object>();
generateBeanPrologue(out, map);
generatePostConstruct(out);
//_postConstructInterceptor.generatePrologue(out, map);
//_preDestroyInterceptor.generatePrologue(out, map);
out.println();
out.println(getBeanClassName() + "(" + getViewClassName() + " context)");
out.println("{");
out.pushDepth();
out.println("_context = context;");
map = new HashMap<String,Object>();
generateBeanConstructor(out, map);
//_postConstructInterceptor.generateConstructor(out, map);
//_preDestroyInterceptor.generateConstructor(out, map);
//_postConstructInterceptor.generateCall(out);
out.popDepth();
out.println("}");
// generateBusinessMethods(out);
out.popDepth();
out.println("}");
}
protected void generateClassContent(JavaWriter out)
throws IOException
{
out.println("private transient SingletonContext _context;");
out.println("private transient SingletonManager _manager;");
if (isProxy()) {
out.println("private " + getBeanClassName() + " _bean;");
}
out.println("private transient boolean _isValid;");
out.println("private transient boolean _isActive;");
/*
out.println();
out.println("private static final com.caucho.ejb.gen.XAManager _xa");
out.println(" = new com.caucho.ejb.gen.XAManager();");
*/
//generateBusinessPrologue(out);
out.println();
out.println(getViewClassName() + "(SingletonManager manager)");
out.println("{");
out.pushDepth();
generateSuper(out, "manager");
out.println("_manager = manager;");
out.println("_isValid = true;");
// ejb/1143
if (isProxy()) {
out.println("_bean = new " + getBeanClassName() + "(this);");
}
out.popDepth();
out.println("}");
out.println();
out.println(getViewClassName()
+ "(SingletonManager manager, boolean isProxyFactory)");
out.println("{");
out.pushDepth();
generateSuper(out, "manager");
out.println("_manager = manager;");
out.println("_isValid = true;");
out.popDepth();
out.println("}");
generateSessionProvider(out);
out.println();
out.println("void __caucho_setContext(SingletonContext context)");
out.println("{");
out.println(" _context = context;");
out.println("}");
generateBusinessMethods(out);
}
protected void generateSessionProvider(JavaWriter out)
throws IOException
{
out.println();
out.println("public Object __caucho_createNew(javax.enterprise.inject.spi.InjectionTarget injectBean, javax.enterprise.context.spi.CreationalContext env)");
out.println("{");
out.println(" " + getViewClassName() + " bean"
+ " = new " + getViewClassName() + "(_manager);");
if (isProxy())
out.println(" _manager.initInstance(bean._bean, injectBean, bean, env);");
else
out.println(" _manager.initInstance(bean, injectBean, bean, env);");
out.println(" return bean;");
out.println("}");
}
protected BusinessMethodGenerator
createMethod(ApiMethod apiMethod, int index)
{
ApiMethod implMethod = findImplMethod(apiMethod);
if (implMethod == null)
return null;
SingletonMethod bizMethod
= new SingletonMethod(this,
apiMethod,
implMethod,
index);
return bizMethod;
}
protected void generateSuper(JavaWriter out, String serverVar)
throws IOException
{
}
protected void generateExtends(JavaWriter out)
throws IOException
{
}
protected ApiMethod findImplMethod(ApiMethod apiMethod)
{
ApiMethod implMethod = getBeanClass().getMethod(apiMethod);
if (implMethod != null)
return implMethod;
throw new ConfigException(L.l("'{0}' method '{1}' has no corresponding implementation in '{2}'",
apiMethod.getMethod().getDeclaringClass().getSimpleName(),
apiMethod.getFullName(),
getBeanClass().getName()));
}
}