001/* 002 * Copyright 2002-2018 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.mock.web; 018 019import javax.servlet.jsp.JspException; 020import javax.servlet.jsp.PageContext; 021 022import org.apache.taglibs.standard.lang.support.ExpressionEvaluatorManager; 023 024/** 025 * Mock implementation of the JSP 2.0 {@link javax.servlet.jsp.el.ExpressionEvaluator} 026 * interface, delegating to the Apache JSTL {@link ExpressionEvaluatorManager}. 027 * Only necessary for testing applications when testing custom JSP tags. 028 * 029 * <p>Note that the Apache JSTL implementation (jstl.jar, standard.jar) has to be 030 * available on the classpath to use this expression evaluator. 031 * 032 * @author Juergen Hoeller 033 * @since 1.1.5 034 * @see org.apache.taglibs.standard.lang.support.ExpressionEvaluatorManager 035 */ 036@SuppressWarnings("deprecation") 037public class MockExpressionEvaluator extends javax.servlet.jsp.el.ExpressionEvaluator { 038 039 private final PageContext pageContext; 040 041 042 /** 043 * Create a new MockExpressionEvaluator for the given PageContext. 044 * @param pageContext the JSP PageContext to run in 045 */ 046 public MockExpressionEvaluator(PageContext pageContext) { 047 this.pageContext = pageContext; 048 } 049 050 051 @Override 052 @SuppressWarnings("rawtypes") 053 public javax.servlet.jsp.el.Expression parseExpression(final String expression, final Class expectedType, 054 final javax.servlet.jsp.el.FunctionMapper functionMapper) throws javax.servlet.jsp.el.ELException { 055 056 return new javax.servlet.jsp.el.Expression() { 057 @Override 058 public Object evaluate(javax.servlet.jsp.el.VariableResolver variableResolver) throws javax.servlet.jsp.el.ELException { 059 return doEvaluate(expression, expectedType, functionMapper); 060 } 061 }; 062 } 063 064 @Override 065 @SuppressWarnings("rawtypes") 066 public Object evaluate(String expression, Class expectedType, javax.servlet.jsp.el.VariableResolver variableResolver, 067 javax.servlet.jsp.el.FunctionMapper functionMapper) throws javax.servlet.jsp.el.ELException { 068 069 return doEvaluate(expression, expectedType, functionMapper); 070 } 071 072 @SuppressWarnings("rawtypes") 073 protected Object doEvaluate(String expression, Class expectedType, javax.servlet.jsp.el.FunctionMapper functionMapper) 074 throws javax.servlet.jsp.el.ELException { 075 076 try { 077 return ExpressionEvaluatorManager.evaluate("JSP EL expression", expression, expectedType, this.pageContext); 078 } 079 catch (JspException ex) { 080 throw new javax.servlet.jsp.el.ELException("Parsing of JSP EL expression \"" + expression + "\" failed", ex); 081 } 082 } 083 084}