/*
* 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.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.decorator.Delegate;
import javax.ejb.MessageDriven;
import javax.ejb.Startup;
import javax.ejb.Stateless;
import javax.ejb.Stateful;
import javax.enterprise.context.NormalScope;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.Disposes;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.Specializes;
import javax.enterprise.inject.Stereotype;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Qualifier;
import javax.inject.Scope;
import com.caucho.config.inject.InjectScanManager.AnnType;
import com.caucho.inject.Jndi;
import com.caucho.inject.MBean;
import com.caucho.loader.enhancer.ScanClass;
/**
* The web beans container for a given environment.
*/
class InjectScanClass implements ScanClass
{
private static final Logger log
= Logger.getLogger(InjectScanClass.class.getName());
private static final char []PRODUCES
= Produces.class.getName().toCharArray();
private static final char []DISPOSES
= Disposes.class.getName().toCharArray();
private static final char []OBSERVES
= Observes.class.getName().toCharArray();
private static final char []OBJECT
= Object.class.getName().toCharArray();
private static final HashSet<Class<?>> _registerAnnotationSet
= new HashSet<Class<?>>();
private final String _className;
private final InjectScanManager _scanManager;
private InjectScanClass _parent;
private ArrayList<InjectScanClass> _children;
private boolean _isScanClass;
private boolean _isRegisterRequired;
private boolean _isRegistered;
private boolean _isObserves;
InjectScanClass(String className, InjectScanManager manager)
{
_className = className;
_scanManager = manager;
}
/**
* Returns the bean's class name.
*/
public String getClassName()
{
return _className;
}
public void setScanClass()
{
_isScanClass = true;
}
public boolean isScanClass()
{
return _isScanClass;
}
/**
* Returns true if registration is required
*/
public boolean isRegisterRequired()
{
return _isRegisterRequired;
}
public boolean isRegistered()
{
return _isRegistered;
}
public boolean isObserves()
{
return _isObserves;
}
@Override
public void addInterface(char[] buffer, int offset, int length)
{
addParent(new String(buffer, offset, length));
}
@Override
public void addSuperClass(char[] buffer, int offset, int length)
{
if (isMatch(buffer, offset, length, OBJECT)) {
return;
}
addParent(new String(buffer, offset, length));
}
@Override
public void addClassAnnotation(char[] buffer, int offset, int length)
{
try {
AnnType annType = _scanManager.loadAnnotation(buffer, offset, length);
if (annType == null)
return;
if (_registerAnnotationSet.contains(annType.getType())) {
if (annType.getType() == Observes.class)
setObserves();
_isRegisterRequired = true;
return;
}
for (Annotation ann : annType.getAnnotations()) {
Class<? extends Annotation> metaAnnType = ann.annotationType();
if (metaAnnType == Stereotype.class) {
_isRegisterRequired = true;
}
else if (metaAnnType == Scope.class) {
_isRegisterRequired = true;
}
else if (metaAnnType == NormalScope.class) {
// ioc/02a3
_isRegisterRequired = true;
}
}
} catch (ClassNotFoundException e) {
log.log(Level.FINER, e.toString(), e);
}
}
private void setObserves()
{
_isObserves = true;
_isRegisterRequired = true;
// ioc/0b25
if (_children != null) {
for (InjectScanClass scanClass : _children) {
scanClass.setObserves();
}
}
}
@Override
public void addPoolString(char[] buffer, int offset, int length)
{
if (isMatch(buffer, offset, length, PRODUCES)) {
_isRegisterRequired = true;
}
else if (isMatch(buffer, offset, length, DISPOSES)) {
_isRegisterRequired = true;
}
else if (isMatch(buffer, offset, length, OBSERVES)) {
setObserves();
}
}
@Override
public boolean finishScan()
{
if (_isRegisterRequired
|| _scanManager.isCustomExtension()
|| _parent != null && _parent.isRegistered()) {
register();
}
return true;
}
private void addParent(String className)
{
InjectScanClass parent = _scanManager.createScanClass(className);
parent.addChild(this);
if (_parent == null)
_parent = parent;
}
private void addChild(InjectScanClass child)
{
if (_children == null)
_children = new ArrayList<InjectScanClass>();
if (! _children.contains(child))
_children.add(child);
if (_isObserves) {
child.setObserves();
}
}
void register()
{
if (_isScanClass && ! _isRegistered) {
_isRegistered = true;
_scanManager.addDiscoveredClass(this);
}
if (_children != null) {
for (InjectScanClass child : _children) {
child.register();
}
}
}
private boolean isMatch(char []buffer,
int offset,
int length,
char []matchBuffer)
{
if (length != matchBuffer.length)
return false;
for (int i = 0; i < length; i++) {
if (buffer[offset + i] != matchBuffer[i])
return false;
}
return true;
}
public String toString()
{
return getClass().getSimpleName() + "[" + _className + "]";
}
static {
_registerAnnotationSet.add(Inject.class);
_registerAnnotationSet.add(Named.class);
_registerAnnotationSet.add(Specializes.class);
_registerAnnotationSet.add(Delegate.class);
_registerAnnotationSet.add(Startup.class);
_registerAnnotationSet.add(Jndi.class);
_registerAnnotationSet.add(MBean.class);
_registerAnnotationSet.add(Stateless.class);
_registerAnnotationSet.add(Stateful.class);
_registerAnnotationSet.add(javax.ejb.Singleton.class);
_registerAnnotationSet.add(MessageDriven.class);
_registerAnnotationSet.add(Qualifier.class);
}
}