Quellcode-Bibliothek VariableResolver.java Sprache: JAVA

/*
* 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 jakarta.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 JSP 2.0
*
* @deprecated As of JSP 2.1, replaced by jakarta.el.ELResolver
*/
@Deprecated
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
     */
    Object resolveVariable(String pName) throws ELException;
}

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