View Javadoc
1 /* 2 * $Header: /home/cvs/jakarta-commons/betwixt/src/java/org/apache/commons/betwixt/expression/Expression.java,v 1.2 2003/01/09 22:34:07 rdonkin Exp $ 3 * $Revision: 1.2 $ 4 * $Date: 2003/01/09 22:34:07 $ 5 * 6 * ==================================================================== 7 * 8 * The Apache Software License, Version 1.1 9 * 10 * Copyright (c) 1999-2002 The Apache Software Foundation. All rights 11 * reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in 22 * the documentation and/or other materials provided with the 23 * distribution. 24 * 25 * 3. The end-user documentation included with the redistribution, if 26 * any, must include the following acknowlegement: 27 * "This product includes software developed by the 28 * Apache Software Foundation (http://www.apache.org/)." 29 * Alternately, this acknowlegement may appear in the software itself, 30 * if and wherever such third-party acknowlegements normally appear. 31 * 32 * 4. The names "The Jakarta Project", "Commons", and "Apache Software 33 * Foundation" must not be used to endorse or promote products derived 34 * from this software without prior written permission. For written 35 * permission, please contact apache@apache.org. 36 * 37 * 5. Products derived from this software may not be called "Apache" 38 * nor may "Apache" appear in their names without prior written 39 * permission of the Apache Group. 40 * 41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 * ==================================================================== 54 * 55 * This software consists of voluntary contributions made by many 56 * individuals on behalf of the Apache Software Foundation. For more 57 * information on the Apache Software Foundation, please see 58 * <http://www.apache.org/>;. 59 * 60 * $Id: Expression.java,v 1.2 2003/01/09 22:34:07 rdonkin Exp $ 61 */ 62 package org.apache.commons.betwixt.expression; 63 64 /*** <p><code>Expression</code> represents an arbitrary expression on a bean.</p> 65 * 66 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> 67 * @version $Revision: 1.2 $ 68 */ 69 public interface Expression { 70 71 /*** Evaluates the expression on the bean with the given context 72 * and returns the result 73 * 74 * @param context evaluate against this <code>Context</code> 75 * @return the value of the expression 76 */ 77 public Object evaluate(Context context); 78 79 80 /* XXX 81 Is update actually useful? 82 None of the expression implementations i can find do anything when it's called. 83 I suspect that it's been replaced by Updater 84 but i maybe i'm missing something subtle 85 */ 86 /*** <p>Updates the current bean context with a new String value. 87 * This is typically used when parsing XML and updating a beans value 88 * from XML.<p> 89 * 90 * @param context update this <code>Context</code> 91 * @param newValue the new value for this expression 92 */ 93 public void update(Context context, String newValue); 94 }

This page was automatically generated by Maven