/*
* Copyright (c) 1998-2011 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.util.ArrayList;
import java.util.HashMap;
import javax.ejb.Singleton;
import javax.enterprise.inject.spi.AnnotatedType;
import com.caucho.config.gen.AspectBeanFactory;
import com.caucho.config.gen.CandiEnhancedBean;
import com.caucho.config.gen.LifecycleAspectBeanFactory;
import com.caucho.config.inject.InjectManager;
import com.caucho.inject.Module;
import com.caucho.java.JavaWriter;
/**
* Generates the skeleton for a singleton bean.
*/
@Module
public class SingletonGenerator<X> extends SessionGenerator<X> {
private final AspectBeanFactory<X> _aspectBeanFactory;
private final AspectBeanFactory<X> _lifecycleAspectFactory;
public SingletonGenerator(String ejbName, AnnotatedType<X> ejbClass,
ArrayList<AnnotatedType<? super X>> localApi,
AnnotatedType<X> localBean,
ArrayList<AnnotatedType<? super X>> remoteApi)
{
super(ejbName, ejbClass, localApi, localBean, remoteApi,
Singleton.class.getSimpleName());
InjectManager manager = InjectManager.create();
_aspectBeanFactory = new SingletonAspectBeanFactory<X>(manager, getBeanType());
_lifecycleAspectFactory = new LifecycleAspectBeanFactory<X>(_aspectBeanFactory, manager, getBeanType());
}
@Override
protected AspectBeanFactory<X> getAspectBeanFactory()
{
return _aspectBeanFactory;
}
@Override
protected AspectBeanFactory<X> getLifecycleAspectFactory()
{
return _lifecycleAspectFactory;
}
@Override
public boolean isStateless()
{
return false;
}
@Override
protected boolean isTimerSupported()
{
return true;
}
public String getContextClassName()
{
return getClassName();
}
/**
* True if the implementation is a proxy, i.e. an interface stub which
* calls an instance class.
*/
@Override
public boolean isProxy()
{
return true;
}
@Override
public String getViewClassName()
{
return "SingletonView";
}
@Override
public String getBeanClassName()
{
return "Bean";
}
/**
* Scans for the @Local interfaces
*/
@Override
protected AnnotatedType<? super X> introspectLocalDefault()
{
return getBeanType();
}
/**
* Generates the singleton session bean
*/
@Override
public void generate(JavaWriter out) throws IOException
{
generateTopComment(out);
out.println();
out.println("package " + getPackageName() + ";");
out.println();
out.println("import com.caucho.config.*;");
out.println("import com.caucho.ejb.*;");
out.println("import com.caucho.ejb.session.*;");
out.println();
out.println("import javax.ejb.*;");
out.println("import javax.transaction.*;");
out.println("import javax.enterprise.context.spi.CreationalContext;");
generateClassHeader(out);
out.println("{");
out.pushDepth();
generateClassStaticFields(out);
generateClassContent(out);
generateDependency(out);
out.popDepth();
out.println("}");
}
private void generateClassHeader(JavaWriter out)
throws IOException
{
out.println();
out.println("public class " + getClassName() + "<T>");
if (hasNoInterfaceView())
out.println(" extends " + getBeanType().getJavaClass().getName());
out.print(" implements SessionProxyFactory<T>");
out.print(",\n " + CandiEnhancedBean.class.getName());
for (AnnotatedType<? super X> apiType : getLocalApi()) {
out.print(",\n ");
out.printType(apiType.getBaseType());
}
for (AnnotatedType<? super X> apiType : getRemoteApi()) {
out.print(",\n ");
out.printType(apiType.getBaseType());
}
out.println();
}
@Override
protected void generateClassContent(JavaWriter out)
throws IOException
{
out.println("private transient SingletonContext _context;");
out.println("private transient SingletonManager _manager;");
String beanClassName = getBeanType().getJavaClass().getName();
out.println("private " + beanClassName + " _bean;");
out.println("private transient boolean _isValid;");
out.println("private transient boolean _isActive;");
HashMap<String,Object> map = new HashMap<String,Object>();
generateConstructor(out);
generateProxyFactory(out);
generateContentImpl(out, map);
// generateSerialization(out);
}
@Override
protected void generateInjectContent(JavaWriter out,
HashMap<String,Object> map)
throws IOException
{
String beanClassName = getBeanType().getJavaClass().getName();
out.println("_bean = (" + beanClassName + ") _manager.newInstance(parentEnv);");
super.generateInjectContent(out, map);
}
private void generateConstructor(JavaWriter out)
throws IOException
{
out.println();
out.print("public " + getClassName() + "(SingletonManager manager");
out.println(", SingletonContext context)");
out.println("{");
out.pushDepth();
out.println("_manager = manager;");
out.popDepth();
out.println("}");
out.println();
out.print("private ");
out.println(getClassName()
+ "(SingletonManager manager"
+ ", com.caucho.config.inject.CreationalContextImpl<T> env)");
out.println("{");
out.pushDepth();
out.println("_manager = manager;");
out.println("_isValid = true;");
generateContextObjectConstructor(out);
out.popDepth();
out.println("}");
}
private void generateProxyFactory(JavaWriter out)
throws IOException
{
out.println();
out.println("@Override");
out.println("public T __caucho_createProxy(com.caucho.config.inject.CreationalContextImpl<T> env)");
out.println("{");
out.println(" return (T) new " + getClassName() + "(_manager, env);");
out.println("}");
out.println();
out.println("@Override");
out.println("public void __caucho_destroy()");
out.println("{");
out.println("}");
}
}