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Tomcat example source code file (ExpressionEvaluator.java)
The Tomcat ExpressionEvaluator.java source code/* * 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>The abstract base class for an expression-language evaluator. * Classes that implement an expression language expose their functionality * via this abstract class.</p> * * <p>An instance of the ExpressionEvaluator can be obtained via the * JspContext / PageContext</p> * * <p>The parseExpression() and evaluate() methods must be thread-safe. * That is, multiple threads may call these methods on the same * ExpressionEvaluator object simultaneously. Implementations should * synchronize access if they depend on transient state. Implementations * should not, however, assume that only one object of each * ExpressionEvaluator type will be instantiated; global caching should * therefore be static.</p> * * <p>Only a single EL expression, starting with '${' and ending with * '}', can be parsed or evaluated at a time. EL expressions * cannot be mixed with static text. For example, attempting to * parse or evaluate "<code>abc${1+1}def${1+1}ghi" or even * "<code>${1+1}${1+1}" will cause an Other Tomcat examples (source code examples)Here is a short list of links related to this Tomcat ExpressionEvaluator.java source code file: |
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