/*
* 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 javax.el;
import java.beans.FeatureDescriptor;
import java.util.ArrayList;
import java.util.Iterator;
/**
* Resolves properties based on arrays.
*/
public class CompositeELResolver extends ELResolver {
private final ArrayList<ELResolver> _resolvers
= new ArrayList<ELResolver>();
public CompositeELResolver()
{
}
public void add(ELResolver elResolver)
{
if (elResolver == null)
throw new NullPointerException();
_resolvers.add(elResolver);
}
@Override
public Class<?> getCommonPropertyType(ELContext env, Object base)
{
Class commonClass = null;
int size = _resolvers.size();
for (int i = 0; i < size; i++) {
ELResolver resolver = _resolvers.get(i);
Class cl = resolver.getCommonPropertyType(env, base);
if (cl == null)
continue;
commonClass = cl;
}
return commonClass;
}
@Override
public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext env,
Object base)
{
ArrayList<FeatureDescriptor> descriptors
= new ArrayList<FeatureDescriptor>();
int size = _resolvers.size();
for (int i = 0; i < size; i++) {
ELResolver resolver = _resolvers.get(i);
Iterator<FeatureDescriptor> iter
= resolver.getFeatureDescriptors(env, base);
if (iter == null)
continue;
while (iter.hasNext()) {
FeatureDescriptor desc = iter.next();
descriptors.add(desc);
}
}
return descriptors.iterator();
}
@Override
public Class<?> getType(ELContext env,
Object base,
Object property)
{
env.setPropertyResolved(false);
int size = _resolvers.size();
for (int i = 0; i < size; i++) {
ELResolver resolver = _resolvers.get(i);
Class type = resolver.getType(env, base, property);
if (env.isPropertyResolved())
return type;
}
return null;
}
@Override
public Object getValue(ELContext context,
Object base,
Object property)
{
context.setPropertyResolved(false);
int size = _resolvers.size();
for (int i = 0; i < size; i++) {
ELResolver resolver = _resolvers.get(i);
Object value = resolver.getValue(context, base, property);
if (context.isPropertyResolved())
return value;
}
return null;
}
@Override
public boolean isReadOnly(ELContext context,
Object base,
Object property)
{
context.setPropertyResolved(false);
int size = _resolvers.size();
for (int i = 0; i < size; i++) {
ELResolver resolver = _resolvers.get(i);
boolean value = resolver.isReadOnly(context, base, property);
if (context.isPropertyResolved())
return value;
}
return true;
}
@Override
public void setValue(ELContext context,
Object base,
Object property,
Object value)
{
context.setPropertyResolved(false);
int size = _resolvers.size();
for (int i = 0; i < size; i++) {
ELResolver resolver = _resolvers.get(i);
resolver.setValue(context, base, property, value);
if (context.isPropertyResolved())
return;
}
}
}