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1 /* 2 * $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/define/DynamicTag.java,v 1.7 2002/05/17 15:18:12 jstrachan Exp $ 3 * $Revision: 1.7 $ 4 * $Date: 2002/05/17 15:18:12 $ 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: DynamicTag.java,v 1.7 2002/05/17 15:18:12 jstrachan Exp $ 61 */ 62 package org.apache.commons.jelly.tags.define; 63 64 import org.apache.commons.jelly.JellyException; 65 import org.apache.commons.jelly.TagSupport; 66 import org.apache.commons.jelly.XMLOutput; 67 import org.apache.commons.jelly.expression.Expression; 68 import org.apache.commons.jelly.impl.Attribute; 69 70 import org.apache.commons.logging.Log; 71 import org.apache.commons.logging.LogFactory; 72 73 /*** 74 * This tag is bound onto a Java Bean class. When the tag is invoked a bean will be created 75 * using the tags attributes. 76 * The bean may also have an invoke method called invoke(), run(), execute() or some such method 77 * which will be invoked after the bean has been configured.</p> 78 * 79 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> 80 * @author <a href="mailto:jason@zenplex.com">Jason van Zyl</a> 81 * @version $Revision: 1.7 $ 82 */ 83 public class AttributeTag extends TagSupport { 84 85 /*** The Log to which logging calls will be made. */ 86 private static final Log log = LogFactory.getLog(AttributeTag.class); 87 88 /*** the attribute definition */ 89 private Attribute attribute; 90 91 public AttributeTag() { 92 attribute = new Attribute(); 93 } 94 95 public AttributeTag(Attribute attribute) { 96 this.attribute = attribute; 97 } 98 99 // Tag interface 100 //------------------------------------------------------------------------- 101 public void doTag(XMLOutput output) throws Exception { 102 BeanTag tag = (BeanTag) findAncestorWithClass( BeanTag.class ); 103 if ( tag == null ) { 104 throw new JellyException( "This tag should be nested inside a <define:bean> or <define:jellybean> tag" ); 105 } 106 107 tag.addAttribute( attribute ); 108 } 109 110 // Properties 111 //------------------------------------------------------------------------- 112 113 /*** 114 * Sets the name of the attribute 115 */ 116 public void setName(String name) { 117 attribute.setName(name); 118 } 119 120 /*** 121 * Sets whether this attribute is mandatory or not 122 */ 123 public void setRequired(boolean required) { 124 attribute.setRequired(required); 125 } 126 127 /*** 128 * Sets the default value of this attribute 129 */ 130 public void setDefaultValue(Expression defaultValue) { 131 attribute.setDefaultValue(defaultValue); 132 } 133 }

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