javax.servlet.jsp.el.VariableResolver Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates and others.
* All rights reserved.
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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;
/**
*
* 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.
*
*
*
* An instance of this class includes the context against which resolution will happen
*
*
* @deprecated As of JSP 2.1, replaced by {@link javax.el.ELResolver}
* @since JSP 2.0
*/
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;
}