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1 /* 2 * $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/define/TaglibTag.java,v 1.8 2002/08/09 17:26:40 jstrachan Exp $ 3 * $Revision: 1.8 $ 4 * $Date: 2002/08/09 17:26:40 $ 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: TaglibTag.java,v 1.8 2002/08/09 17:26:40 jstrachan Exp $ 61 */ 62 package org.apache.commons.jelly.tags.define; 63 64 import org.apache.commons.jelly.JellyContext; 65 import org.apache.commons.jelly.DynaTag; 66 import org.apache.commons.jelly.TagLibrary; 67 import org.apache.commons.jelly.TagSupport; 68 import org.apache.commons.jelly.XMLOutput; 69 import org.apache.commons.jelly.impl.DynamicTagLibrary; 70 71 import org.xml.sax.Attributes; 72 import org.xml.sax.helpers.AttributesImpl; 73 74 /*** 75 * The <taglib> tag is used to define a new tag library 76 * using a Jelly script..</p> 77 * 78 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> 79 * @version $Revision: 1.8 $ 80 */ 81 public class TaglibTag extends TagSupport { 82 83 /*** The namespace URI */ 84 private String uri; 85 /*** The new tags being added */ 86 private DynamicTagLibrary tagLibrary; 87 /*** Whether or not inheritence is enabled */ 88 private boolean inherit = true; 89 90 public TaglibTag() { 91 } 92 93 public TaglibTag(String uri) { 94 this.uri = uri; 95 } 96 97 // Tag interface 98 //------------------------------------------------------------------------- 99 public void doTag(XMLOutput output) throws Exception { 100 String uri = getUri(); 101 tagLibrary = new DynamicTagLibrary( uri ); 102 103 // inherit tags from an existing tag library 104 if ( isInherit() ) { 105 tagLibrary.setParent( context.getTagLibrary( uri ) ); 106 } 107 context.registerTagLibrary( uri, tagLibrary ); 108 109 invokeBody(output); 110 111 tagLibrary = null; 112 } 113 114 // Properties 115 //------------------------------------------------------------------------- 116 public String getUri() { 117 return uri; 118 } 119 120 /*** 121 * Sets the namespace URI to register this new dynamic tag library with 122 */ 123 public void setUri(String uri) { 124 this.uri = uri; 125 } 126 127 public DynamicTagLibrary getTagLibrary() { 128 return tagLibrary; 129 } 130 131 /*** 132 * Returns the inherit. 133 * @return boolean 134 */ 135 public boolean isInherit() { 136 return inherit; 137 } 138 139 /*** 140 * Sets whether this dynamic tag should inherit from the current existing tag library 141 * of the same URI. This feature is enabled by default so that tags can easily be 142 * some tags can be overridden in an existing library, such as when making Mock Tags. 143 * 144 * You can disable this option if you want to disable any tags in the base library, 145 * turning them into just normal static XML. 146 * 147 * @param inherit The inherit to set 148 */ 149 public void setInherit(boolean inherit) { 150 this.inherit = inherit; 151 } 152 153 }

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