/*
* 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.config.j2ee;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import javax.ejb.EJB;
import javax.ejb.EJBs;
import javax.enterprise.inject.spi.AnnotatedField;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.AnnotatedType;
import javax.enterprise.inject.spi.Bean;
import com.caucho.config.ConfigException;
import com.caucho.config.inject.InjectManager;
import com.caucho.config.program.BeanValueGenerator;
import com.caucho.config.program.ConfigProgram;
import com.caucho.config.program.FieldGeneratorProgram;
import com.caucho.config.program.MethodGeneratorProgram;
import com.caucho.config.program.NullProgram;
import com.caucho.config.program.ValueGenerator;
import com.caucho.util.L10N;
/**
* Handles the @EJB annotation for JavaEE
*/
public class EjbHandler extends JavaeeInjectionHandler {
private static final L10N L = new L10N(EjbHandler.class);
public EjbHandler(InjectManager manager)
{
super(manager);
}
@Override
public ConfigProgram introspectField(AnnotatedField<?> field)
{
EJB ejb = field.getAnnotation(EJB.class);
return generateContext(field, ejb);
}
@Override
public ConfigProgram introspectMethod(AnnotatedMethod<?> method)
{
EJB ejb = method.getAnnotation(EJB.class);
return generateContext(method, ejb);
}
@Override
public ConfigProgram introspectType(AnnotatedType<?> type)
{
// ejb/123j
for (Class<?> parentClass = type.getJavaClass().getSuperclass();
parentClass != null;
parentClass = parentClass.getSuperclass()) {
EJBs ejbs = parentClass.getAnnotation(EJBs.class);
if (ejbs != null) {
for (EJB ejb : ejbs.value()) {
introspectClass(getClass().getName(), ejb);
}
}
EJB ejb = parentClass.getAnnotation(EJB.class);
if (ejb != null)
introspectClass(getClass().getName(), ejb);
}
EJBs ejbs = type.getAnnotation(EJBs.class);
if (ejbs != null) {
for (EJB ejb : ejbs.value()) {
introspectClass(getClass().getName(), ejb);
}
}
EJB ejb = type.getAnnotation(EJB.class);
if (ejb != null)
introspectClass(getClass().getName(), ejb);
return new NullProgram();
}
private void introspectClass(String location, EJB ejb)
{
String name = ejb.name();
Class<?> bindType = ejb.beanInterface();
if ("".equals(name))
throw new ConfigException(L.l("{0}: @EJB name() attribute is required for @EJB on a class.",
location));
if (Object.class.equals(bindType))
throw new ConfigException(L.l("{0}: @EJB beanInterface() attribute is required for @EJB on a class.",
location));
ValueGenerator gen = bindGenerator(location, ejb, bindType);
if (name != null && ! "".equals(name)) {
bindJndi(name, gen, name);
}
}
private ConfigProgram generateContext(AnnotatedField<?> field,
EJB ejb)
throws ConfigException
{
String name = ejb.name();
Field javaField = field.getJavaMember();
String location = getLocation(javaField);
Class<?> bindType = javaField.getType();
ValueGenerator gen = bindGenerator(location, ejb, bindType);
if (name != null && ! "".equals(name))
bindJndi(name, gen, name);
bindJndi(javaField, gen);
return new FieldGeneratorProgram(javaField, gen);
}
private ConfigProgram generateContext(AnnotatedMethod<?> method,
EJB ejb)
throws ConfigException
{
String name = ejb.name();
Method javaMethod = method.getJavaMember();
String location = getLocation(javaMethod);
Class<?> bindType = javaMethod.getParameterTypes()[0];
// ejb/2005
if (! Object.class.equals(ejb.beanInterface())) {
bindType = ejb.beanInterface();
}
ValueGenerator gen = bindGenerator(location, ejb, bindType);
if (name != null && ! "".equals(name))
bindJndi(name, gen, name);
bindJndi(javaMethod, gen);
return new MethodGeneratorProgram(javaMethod, gen);
}
protected ValueGenerator bindGenerator(String location,
EJB ejb,
Class<?> bindType)
{
String name = ejb.name();
String mappedName = ejb.mappedName();
String beanName = ejb.beanName();
String lookupName = ejb.lookup();
// ejb/2005
if (! Object.class.equals(ejb.beanInterface())) {
bindType = ejb.beanInterface();
}
if (lookupName != null && ! "".equals(lookupName)) {
return new JndiValueGenerator(location, bindType, lookupName);
}
/*
if (! "".equals(pContext.name()))
jndiName = pContext.name();
*/
Bean<?> bean = null;
if (! "".equals(beanName))
bean = bind(location, bindType, new BeanNameLiteral(beanName));
else
bean = bind(location, bindType, EjbQualifierLiteral.QUALIFIER);
if (bean == null)
bean = bind(location, bindType, name);
if (bean == null)
bean = bind(location, bindType, mappedName);
if (bean != null) {
// valid bean
}
else if (! "".equals(name)) {
throw new ConfigException(location + L.l("name='{0}' is an unknown @EJB.",
name));
}
else if (! "".equals(mappedName)) {
throw new ConfigException(location + L.l("mappedName='{0}' is an unknown @EJB.",
mappedName));
}
else {
throw new ConfigException(location + L.l("@EJB cannot find any defined EJBs. No @EJB with type='{0}'",
bindType));
}
return new BeanValueGenerator(location, bean);
}
}