/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package javax.servlet.jsp.el;
/**
* <p>This class is used to customize the way an ExpressionEvaluator resolves
* variable references at evaluation time. For example, instances of this class can
* implement their own variable lookup mechanisms, or introduce the
* notion of "implicit variables" which override any other variables.
* An instance of this class should be passed when evaluating
* an expression.</p>
*
* <p>An instance of this class includes the context against which resolution
* will happen</p>
*
* @since 2.0
* @deprecated As of JSP 2.1, replaced by javax.el.ELResolver
*/
@SuppressWarnings("dep-ann") // TCK signature test fails with annotation
public interface VariableResolver
{
//-------------------------------------
/**
* Resolves the specified variable.
* Returns null if the variable is not found.
*
* @param pName the name of the variable to resolve
* @return the result of the variable resolution
*
* @throws ELException if a failure occurred while trying to resolve
* the given variable
**/
public Object resolveVariable (String pName)
throws ELException;
//-------------------------------------
}