/*
* 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.config.j2ee;
import java.lang.annotation.Annotation;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashSet;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.Bean;
import javax.inject.Qualifier;
import com.caucho.config.ConfigException;
import com.caucho.config.inject.AbstractInjectionPoint;
import com.caucho.config.inject.CurrentLiteral;
import com.caucho.config.inject.InjectManager;
import com.caucho.config.program.ConfigProgram;
import com.caucho.inject.Module;
@Module
public class PostConstructProgram extends ConfigProgram
{
private Method _init;
private ParamProgram []_program;
public PostConstructProgram(Method init)
{
_init = init;
_init.setAccessible(true);
introspect();
}
@Override
public Class<?> getDeclaringClass()
{
return _init.getDeclaringClass();
}
@Override
public String getName()
{
return _init.getName();
}
protected void introspect()
{
// XXX: type
Type []paramTypes = _init.getGenericParameterTypes();
if (paramTypes.length == 0)
return;
_program = new ParamProgram[paramTypes.length];
Annotation [][]paramAnns = _init.getParameterAnnotations();
InjectManager webBeans = InjectManager.create();
for (int i = 0; i < paramTypes.length; i++) {
Annotation []bindings = createBindings(paramAnns[i]);
_program[i] = new ParamProgram(webBeans, paramTypes[i],
bindings, paramAnns[i]);
}
}
Annotation []createBindings(Annotation []annotations)
{
ArrayList<Annotation> bindingList = new ArrayList<Annotation>();
for (Annotation ann : annotations) {
if (ann.annotationType().isAnnotationPresent(Qualifier.class))
bindingList.add(ann);
}
if (bindingList.size() == 0)
return null;
Annotation []bindings = new Annotation[bindingList.size()];
bindingList.toArray(bindings);
return bindings;
}
@Override
public <T> void inject(T bean, CreationalContext<T> env)
throws ConfigException
{
try {
if (_program != null) {
Object []args = new Object[_program.length];
for (int i = 0; i < args.length; i++) {
args[i] = _program[i].eval(env);
}
_init.invoke(bean, args);
}
else
_init.invoke(bean);
} catch (Exception e) {
throw ConfigException.create(_init, e);
}
}
public int hashCode()
{
return _init.getName().hashCode();
}
public boolean equals(Object o)
{
if (this == o)
return true;
else if (! (o instanceof PostConstructProgram))
return false;
PostConstructProgram program = (PostConstructProgram) o;
Method init = program._init;
if (! _init.getName().equals(init.getName()))
return false;
if (! init.getDeclaringClass().equals(_init.getDeclaringClass()))
return false;
Class<?> []aParam = _init.getParameterTypes();
Class<?> []bParam = init.getParameterTypes();
if (aParam.length != bParam.length)
return false;
for (int i = 0; i < aParam.length; i++) {
if (! aParam[i].equals(bParam[i]))
return false;
}
return true;
}
@Override
public String toString()
{
return getClass().getSimpleName() + "[" + _init + "]";
}
private static class ParamProgram {
private final InjectManager _inject;
private final AbstractInjectionPoint _injectionPoint;
ParamProgram(InjectManager inject,
Type type,
Annotation []bindings,
Annotation []annList)
{
_inject = inject;
Bean<?> bean = null;
Member member = null;
HashSet<Annotation> bindingSet = new HashSet<Annotation>();
if (bindings != null) {
for (Annotation ann : bindings)
bindingSet.add(ann);
}
else
bindingSet.add(CurrentLiteral.CURRENT);
_injectionPoint = new AbstractInjectionPoint(inject,
bean, member, type,
bindingSet, annList);
}
public Object eval(CreationalContext<?> env)
{
return _inject.getInjectableReference(_injectionPoint, env);
}
}
}