001/* 002 * Copyright 2002-2015 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 ExpressionEvaluatorManager. 027 * 028 * <p>Used for testing the web framework; only necessary for testing applications 029 * when testing custom JSP tags. 030 * 031 * <p>Note that the Apache JSTL implementation (jstl.jar, standard.jar) has to be 032 * available on the class path to use this expression evaluator. 033 * 034 * @author Juergen Hoeller 035 * @since 1.1.5 036 * @see org.apache.taglibs.standard.lang.support.ExpressionEvaluatorManager 037 */ 038@SuppressWarnings("deprecation") 039public class MockExpressionEvaluator extends javax.servlet.jsp.el.ExpressionEvaluator { 040 041 private final PageContext pageContext; 042 043 044 /** 045 * Create a new MockExpressionEvaluator for the given PageContext. 046 * @param pageContext the JSP PageContext to run in 047 */ 048 public MockExpressionEvaluator(PageContext pageContext) { 049 this.pageContext = pageContext; 050 } 051 052 053 @Override 054 @SuppressWarnings("rawtypes") 055 public javax.servlet.jsp.el.Expression parseExpression(final String expression, final Class expectedType, 056 final javax.servlet.jsp.el.FunctionMapper functionMapper) throws javax.servlet.jsp.el.ELException { 057 058 return new javax.servlet.jsp.el.Expression() { 059 @Override 060 public Object evaluate(javax.servlet.jsp.el.VariableResolver variableResolver) throws javax.servlet.jsp.el.ELException { 061 return doEvaluate(expression, expectedType, functionMapper); 062 } 063 }; 064 } 065 066 @Override 067 @SuppressWarnings("rawtypes") 068 public Object evaluate(String expression, Class expectedType, javax.servlet.jsp.el.VariableResolver variableResolver, 069 javax.servlet.jsp.el.FunctionMapper functionMapper) throws javax.servlet.jsp.el.ELException { 070 071 if (variableResolver != null) { 072 throw new IllegalArgumentException("Custom VariableResolver not supported"); 073 } 074 return doEvaluate(expression, expectedType, functionMapper); 075 } 076 077 @SuppressWarnings("rawtypes") 078 protected Object doEvaluate(String expression, Class expectedType, javax.servlet.jsp.el.FunctionMapper functionMapper) 079 throws javax.servlet.jsp.el.ELException { 080 081 if (functionMapper != null) { 082 throw new IllegalArgumentException("Custom FunctionMapper not supported"); 083 } 084 try { 085 return ExpressionEvaluatorManager.evaluate("JSP EL expression", expression, expectedType, this.pageContext); 086 } 087 catch (JspException ex) { 088 throw new javax.servlet.jsp.el.ELException("Parsing of JSP EL expression \"" + expression + "\" failed", ex); 089 } 090 } 091 092}