com.sun.faces.el.DemuxCompositeELResolver Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of javax.faces Show documentation
Show all versions of javax.faces Show documentation
This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.faces.el;
import java.beans.FeatureDescriptor;
import java.util.Iterator;
import java.util.NoSuchElementException;
import javax.el.ELResolver;
import javax.el.ELContext;
import javax.el.ELException;
/**
* Maintains an ordered composite list of child ELResolver for JSF.
*
*/
public class DemuxCompositeELResolver extends FacesCompositeELResolver
{
private final ELResolverChainType _chainType;
private ELResolver[] _rootELResolvers = new ELResolver[2];
private ELResolver[] _propertyELResolvers = new ELResolver[2];
private ELResolver[] _allELResolvers = new ELResolver[2];
private int _rootELResolverCount = 0;
private int _propertyELResolverCount = 0;
private int _allELResolverCount = 0;
public DemuxCompositeELResolver(ELResolverChainType chainType)
{
if (chainType == null)
throw new NullPointerException();
_chainType = chainType;
}
@Override
public ELResolverChainType getChainType()
{
return _chainType;
}
private void _addAllELResolver(ELResolver elResolver)
{
if (elResolver == null)
throw new NullPointerException();
// grow array, if necessary
if (_allELResolverCount == _allELResolvers.length)
{
ELResolver[] biggerResolvers = new ELResolver[_allELResolverCount * 2];
System.arraycopy(_allELResolvers, 0, biggerResolvers, 0, _allELResolverCount);
_allELResolvers = biggerResolvers;
}
// assign new resolver to end
_allELResolvers[_allELResolverCount] = elResolver;
_allELResolverCount++;
}
private void _addRootELResolver(ELResolver elResolver)
{
if (elResolver == null)
throw new NullPointerException();
// grow array, if necessary
if (_rootELResolverCount == _rootELResolvers.length)
{
ELResolver[] biggerResolvers = new ELResolver[_rootELResolverCount * 2];
System.arraycopy(_rootELResolvers, 0, biggerResolvers, 0, _rootELResolverCount);
_rootELResolvers = biggerResolvers;
}
// assign new resolver to end
_rootELResolvers[_rootELResolverCount] = elResolver;
_rootELResolverCount++;
}
public void _addPropertyELResolver(ELResolver elResolver)
{
if (elResolver == null)
throw new NullPointerException();
// grow array, if necessary
if (_propertyELResolverCount == _propertyELResolvers.length)
{
ELResolver[] biggerResolvers = new ELResolver[_propertyELResolverCount * 2];
System.arraycopy(_propertyELResolvers, 0, biggerResolvers, 0, _propertyELResolverCount);
_propertyELResolvers = biggerResolvers;
}
// assign new resolver to end
_propertyELResolvers[_propertyELResolverCount] = elResolver;
_propertyELResolverCount++;
}
@Override
public void addRootELResolver(ELResolver elResolver)
{
// pass ELResolver to CompositeELResolver so that J2EE6 invoke() method works. Once we can
// have a compile dependency on J2EE6, we can override invoke() ourselves and remove this.
super.add(elResolver);
_addRootELResolver(elResolver);
_addAllELResolver(elResolver);
}
@Override
public void addPropertyELResolver(ELResolver elResolver)
{
// pass ELResolver to CompositeELResolver so that J2EE6 invoke() method works. Once we can
// have a compile dependency on J2EE6, we can override invoke() ourselves and remove this.
super.add(elResolver);
_addPropertyELResolver(elResolver);
_addAllELResolver(elResolver);
}
@Override
public void add(ELResolver elResolver)
{
// pass ELResolver to CompositeELResolver so that J2EE6 invoke() method works. Once we can
// have a compile dependency on J2EE6, we can override invoke() ourselves and remove this.
super.add(elResolver);
_addRootELResolver(elResolver);
_addPropertyELResolver(elResolver);
_addAllELResolver(elResolver);
}
private Object _getValue(
int resolverCount,
ELResolver[] resolvers,
ELContext context,
Object base,
Object property) throws ELException
{
for (int i = 0; i < resolverCount; i++)
{
Object result = resolvers[i].getValue(context, base, property);
if (context.isPropertyResolved())
return result;
}
return null;
}
@Override
public Object getValue(ELContext context, Object base, Object property) throws ELException
{
context.setPropertyResolved(false);
int resolverCount;
ELResolver[] resolvers;
if (base == null)
{
resolverCount = _rootELResolverCount;
resolvers = _rootELResolvers;
}
else
{
resolverCount = _propertyELResolverCount;
resolvers = _propertyELResolvers;
}
return _getValue(resolverCount, resolvers, context, base, property);
}
private Class _getType(
int resolverCount,
ELResolver[] resolvers,
ELContext context,
Object base,
Object property) throws ELException
{
for (int i = 0; i < resolverCount; i++)
{
Class type = resolvers[i].getType(context, base, property);
if (context.isPropertyResolved())
return type;
}
return null;
}
@Override
public Class getType(ELContext context, Object base, Object property) throws ELException
{
context.setPropertyResolved(false);
int resolverCount;
ELResolver[] resolvers;
if (base == null)
{
resolverCount = _rootELResolverCount;
resolvers = _rootELResolvers;
}
else
{
resolverCount = _propertyELResolverCount;
resolvers = _propertyELResolvers;
}
return _getType(resolverCount, resolvers, context, base, property);
}
private void _setValue(
int resolverCount,
ELResolver[] resolvers,
ELContext context,
Object base,
Object property,
Object val) throws ELException
{
for (int i = 0; i < resolverCount; i++)
{
resolvers[i].setValue(context, base, property, val);
if (context.isPropertyResolved())
return;
}
}
@Override
public void setValue(ELContext context, Object base, Object property, Object val)
throws ELException
{
context.setPropertyResolved(false);
int resolverCount;
ELResolver[] resolvers;
if (base == null)
{
resolverCount = _rootELResolverCount;
resolvers = _rootELResolvers;
}
else
{
resolverCount = _propertyELResolverCount;
resolvers = _propertyELResolvers;
}
_setValue(resolverCount, resolvers, context, base, property, val);
}
private boolean _isReadOnly(
int resolverCount,
ELResolver[] resolvers,
ELContext context,
Object base,
Object property) throws ELException
{
for (int i = 0; i < resolverCount; i++)
{
boolean isReadOnly = resolvers[i].isReadOnly(context, base, property);
if (context.isPropertyResolved())
return isReadOnly;
}
return false;
}
@Override
public boolean isReadOnly(ELContext context, Object base, Object property)
throws ELException
{
context.setPropertyResolved(false);
int resolverCount;
ELResolver[] resolvers;
if (base == null)
{
resolverCount = _rootELResolverCount;
resolvers = _rootELResolvers;
}
else
{
resolverCount = _propertyELResolverCount;
resolvers = _propertyELResolvers;
}
return _isReadOnly(resolverCount, resolvers, context, base, property);
}
@Override
public Iterator getFeatureDescriptors(ELContext context, Object base)
{
return new DescriptorIterator(context, base, _allELResolvers, _allELResolverCount);
}
private final static class DescriptorIterator implements Iterator
{
// snapshot the ELResolver array to avoid using a non-static inner class that needs to
// make function calls
public DescriptorIterator(
ELContext context,
Object base,
ELResolver[] resolvers,
int resolverCount)
{
_context = context;
_base = base;
_resolvers = resolvers;
_resolverCount = resolverCount;
}
@Override
public boolean hasNext()
{
do
{
// A null return does *not* mean hasNext() should return false.
Iterator currIterator = _getCurrIterator();
if (null != currIterator) {
if (currIterator.hasNext()) {
return true;
} else {
_currIterator = null;
_currResolverIndex++;
}
} else {
if (_currResolverIndex < _resolverCount) {
continue;
} else {
return false;
}
}
} while (true);
}
private Iterator _getCurrIterator()
{
Iterator currIterator = _currIterator;
if (currIterator == null)
{
if (_currResolverIndex < _resolverCount)
{
currIterator = _resolvers[_currResolverIndex].getFeatureDescriptors(_context, _base);
_currResolverIndex++;
_currIterator = currIterator;
}
}
return currIterator;
}
@Override
public FeatureDescriptor next()
{
if (hasNext())
return _getCurrIterator().next();
else
throw new NoSuchElementException();
}
@Override
public void remove()
{
throw new UnsupportedOperationException();
}
private final ELContext _context;
private final Object _base;
private final ELResolver[] _resolvers;
private final int _resolverCount;
private int _currResolverIndex;
private Iterator _currIterator;
}
@Override
public Class getCommonPropertyType(ELContext context, Object base)
{
return null;
}
}