Quelle Expression.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;

/**
* 
* The abstract class for a prepared expression.
* 
* 
* An instance of an Expression can be obtained via from an ExpressionEvaluator instance.
* 
* 
* An Expression may or not have done a syntactic parse of the expression. A client invoking the evaluate() method
* should be ready for the case where ELParseException exceptions are raised.
* 
*
* @since JSP 2.0
*
* @deprecated As of JSP 2.1, replaced by jakarta.el.ValueExpression
*/
@Deprecated
public abstract class Expression {

 /**
 * Evaluates an expression that was previously prepared. In some implementations preparing an expression involves
 * full syntactic validation, but others may not do so. Evaluating the expression may raise an ELParseException as
 * well as other ELExceptions due to run-time evaluation.
 *
 * @param vResolver A VariableResolver instance that can be used at runtime to resolve the name of implicit objects
 * into Objects.
 *
 * @return The result of the expression evaluation.
 *
 * @exception ELException Thrown if the expression evaluation failed.
 */
 public abstract Object evaluate(VariableResolver vResolver) throws ELException;
}

Messung V0.5

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