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Utility classes for properties substitution.
/**
* EasyBeans
* Copyright (C) 2010 Bull S.A.S.
* Contact: [email protected]
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or any later version.
*
* This library 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. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* --------------------------------------------------------------------------
* $Id: FallbackResolver.java 5461 2010-03-26 16:01:19Z sauthieg $
* --------------------------------------------------------------------------
*/
package org.ow2.util.substitution.resolver;
import org.ow2.util.substitution.IPropertyResolver;
/**
* A FallbackResolver is a resolver, usually placed at the end of a chain of resolver
* and that will provide a default value for any given expression.
* This permits to have a little less strict resolution process (the substitution engine
* throwing exceptions if the resolver cannot give a non-null value)
* @author Guillaume Sauthier
*/
public class FallbackResolver implements IPropertyResolver {
/**
* @param expression a property name
* @return the value related to the expression, or null if not found.
*/
public String resolve(String expression) {
// Always return something
return "[" + expression + ":unresolved]";
}
}