/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
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*
* 2. Redistributions in binary form must reproduce the above copyright
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* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation", "Tapestry"
* must not be used to endorse or promote products derived from this
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* 5. Products derived from this software may not be called "Apache"
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* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.tapestry.bean;
import java.util.Map;
import ognl.ObjectPropertyAccessor;
import ognl.OgnlException;
import org.apache.tapestry.IBeanProvider;
/**
* Adapts a {@link org.apache.tapestry.IBeanProvider} to
* <a href="http://www.ognl.org">OGNL</a> by exposing the named
* beans provided by the provider as read-only properties of
* the provider.
*
* <p>This is registered by {@link org.apache.tapestry.AbstractComponent}.
*
* @author Howard Lewis Ship
* @version $Id: BeanProviderPropertyAccessor.java,v 1.2 2003/04/21 13:15:37 glongman Exp $
* @since 2.2
*
**/
public class BeanProviderPropertyAccessor extends ObjectPropertyAccessor
{
/**
* Checks to see if the name matches the name of a bean inside
* the provider and returns that bean if so.
* Otherwise, invokes the super implementation.
*
**/
public Object getProperty(Map context, Object target, Object name) throws OgnlException
{
IBeanProvider provider = (IBeanProvider)target;
String beanName = (String)name;
if (provider.canProvideBean(beanName))
return provider.getBean(beanName);
return super.getProperty(context, target, name);
}
/**
* Returns true if the name matches a bean provided by the provider.
* Otherwise invokes the super implementation.
*
**/
public boolean hasGetProperty(Map context, Object target, Object oname) throws OgnlException
{
IBeanProvider provider = (IBeanProvider)target;
String beanName = (String)oname;
if (provider.canProvideBean(beanName))
return true;
return super.hasGetProperty(context, target, oname);
}
}