/*
* 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.inject;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.util.Set;
import javax.enterprise.context.Dependent;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.IllegalProductException;
import javax.enterprise.inject.InjectionException;
import javax.enterprise.inject.spi.AnnotatedField;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.enterprise.inject.spi.Producer;
import com.caucho.config.program.Arg;
import com.caucho.config.reflect.BaseType;
import com.caucho.inject.Module;
import com.caucho.util.L10N;
/*
* Configuration for a @Produces method
*/
@Module
public class ProducesFieldBean<X,T> extends AbstractIntrospectedBean<T>
{
private static final L10N L = new L10N(ProducesFieldBean.class);
private final Bean<X> _producerBean;
private final AnnotatedField<X> _beanField;
private FieldProducer _fieldProducer = new FieldProducer();
private DisposesProducer _disposesProducer;
private Producer<T> _producer = _fieldProducer;
private boolean _isBound;
private boolean _isPassivating;
private boolean _isStatic;
protected ProducesFieldBean(InjectManager manager,
Bean<X> producerBean,
AnnotatedField<X> beanField,
AnnotatedMethod<X> disposesMethod,
Arg []disposesArgs)
{
super(manager, beanField.getBaseType(), beanField);
_producerBean = producerBean;
_beanField = beanField;
_isStatic = beanField.isStatic();
if (disposesMethod != null)
_disposesProducer = new DisposesProducer(manager, producerBean,
disposesMethod, disposesArgs);
if (beanField == null)
throw new NullPointerException();
}
public static ProducesFieldBean create(InjectManager manager,
Bean producer,
AnnotatedField beanField,
AnnotatedMethod disposesMethod,
Arg []disposesArgs)
{
ProducesFieldBean bean
= new ProducesFieldBean(manager, producer, beanField,
disposesMethod, disposesArgs);
bean.introspect();
bean.introspect(beanField);
BaseType type = manager.createSourceBaseType(beanField.getBaseType());
if (type.isGeneric()) {
// ioc/07f1
throw new InjectionException(L.l("'{0}' is an invalid @Produces field because it returns a generic type {1}",
beanField.getJavaMember(),
type));
}
return bean;
}
public Producer<T> getProducer()
{
return _producer;
}
public void setProducer(Producer<T> producer)
{
_producer = producer;
}
public Bean<X> getProducerBean()
{
return _producerBean;
}
@Override
public Class<?> getBeanClass()
{
return _producerBean.getBeanClass();
}
public AnnotatedField<X> getField()
{
return _beanField;
}
@Override
protected String getDefaultName()
{
return _beanField.getJavaMember().getName();
}
@Override
public void introspect()
{
super.introspect();
_isPassivating = getBeanManager().isPassivatingScope(getScope());
}
@Override
public T create(CreationalContext<T> createEnv)
{
return _producer.produce(createEnv);
}
@Override
public void destroy(T instance, CreationalContext<T> cxt)
{
if (_producer == _fieldProducer)
_fieldProducer.destroy(instance, (CreationalContextImpl<T>) cxt);
else
_producer.dispose(instance);
if (cxt instanceof CreationalContextImpl<?>) {
CreationalContextImpl<?> env = (CreationalContextImpl<?>) cxt;
env.clearTarget();
}
cxt.release();
}
@Override
public void bind()
{
}
@Override
public String toString()
{
StringBuilder sb = new StringBuilder();
sb.append(getClass().getSimpleName());
sb.append("[");
Field field = _beanField.getJavaMember();
sb.append(getTargetSimpleName());
sb.append(", ");
sb.append(field.getDeclaringClass().getSimpleName());
sb.append(".");
sb.append(field.getName());
sb.append("()");
sb.append(", {");
boolean isFirst = true;
for (Annotation ann : getQualifiers()) {
if (! isFirst)
sb.append(", ");
sb.append(ann);
isFirst = false;
}
sb.append("}");
if (getName() != null) {
sb.append(", name=");
sb.append(getName());
}
sb.append("]");
return sb.toString();
}
class FieldProducer implements Producer<T> {
/**
* Produces a new bean instance
*/
@Override
public T produce(CreationalContext<T> cxt)
{
Class<?> type = _producerBean.getBeanClass();
ProducesCreationalContext<X> producerCxt;
if (cxt instanceof CreationalContextImpl<?>) {
CreationalContextImpl<?> parentCxt = (CreationalContextImpl<?>) cxt;
producerCxt = new ProducesCreationalContext<X>(_producerBean, parentCxt);
}
else
producerCxt = new ProducesCreationalContext<X>(_producerBean, null);
X factory;
if (_isStatic) {
factory = null;
}
else {
factory = (X) getBeanManager().getReference(_producerBean, type, producerCxt);
if (factory == null) {
throw new IllegalStateException(L.l("{0}: unexpected null factory for {1}",
this, _producerBean));
}
}
CreationalContextImpl<T> env = (CreationalContextImpl<T>) cxt;
T instance = produce(factory, env.findInjectionPoint());
if (_producerBean.getScope() == Dependent.class)
_producerBean.destroy(factory, producerCxt);
if (_isPassivating && ! (instance instanceof Serializable))
throw new IllegalProductException(L.l("'{0}' is an invalid @{1} instance because it's not serializable for bean {2}",
instance, getScope().getSimpleName(), this));
return instance;
}
/**
* Produces a new bean instance
*/
private T produce(X bean, InjectionPoint ij)
{
try {
Field field = _beanField.getJavaMember();
field.setAccessible(true);
T value = (T) _beanField.getJavaMember().get(bean);
if (value != null)
return value;
if (! Dependent.class.equals(getScope()))
throw new IllegalProductException(L.l("'{0}' is an invalid producer because it returns null",
bean));
return value;
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public void destroy(T instance, CreationalContextImpl<T> cxt)
{
if (_disposesProducer != null)
_disposesProducer.destroy(instance, cxt);
}
@Override
public void dispose(T instance)
{
if (_disposesProducer != null)
_disposesProducer.dispose(instance);
}
@Override
public Set<InjectionPoint> getInjectionPoints()
{
return ProducesFieldBean.this.getInjectionPoints();
}
@Override
public String toString()
{
Field javaField = _beanField.getJavaMember();
return (getClass().getSimpleName()
+ "[" + javaField.getDeclaringClass().getSimpleName()
+ "." + javaField.getName() + "]");
}
}
}