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| org.apache.commons.jelly.impl.DynamicTag |
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| 1 | /* |
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| 2 | * Copyright 2002,2004 The Apache Software Foundation. |
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| 3 | * |
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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| 5 | * you may not use this file except in compliance with the License. |
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| 6 | * You may obtain a copy of the License at |
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| 7 | * |
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 9 | * |
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| 10 | * Unless required by applicable law or agreed to in writing, software |
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 13 | * See the License for the specific language governing permissions and |
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| 14 | * limitations under the License. |
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| 15 | */ |
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| 16 | package org.apache.commons.jelly.impl; |
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| 17 | ||
| 18 | import java.util.HashMap; |
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| 19 | import java.util.Map; |
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| 20 | import java.util.Iterator; |
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| 21 | ||
| 22 | import org.apache.commons.jelly.DynaTagSupport; |
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| 23 | import org.apache.commons.jelly.JellyContext; |
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| 24 | import org.apache.commons.jelly.JellyTagException; |
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| 25 | import org.apache.commons.jelly.Script; |
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| 26 | import org.apache.commons.jelly.XMLOutput; |
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| 27 | import org.apache.commons.logging.Log; |
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| 28 | import org.apache.commons.logging.LogFactory; |
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| 29 | ||
| 30 | /** |
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| 31 | * <p><code>DynamicTag</code> is a tag that is created from |
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| 32 | * inside a Jelly script as a Jelly template and will invoke a |
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| 33 | * given script, passing in its instantiation attributes |
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| 34 | * as variables and will allow the template to invoke its instance body.</p> |
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| 35 | * |
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| 36 | * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
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| 37 | * @version $Revision: 155420 $ |
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| 38 | */ |
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| 39 | public class DynamicTag extends DynaTagSupport { |
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| 40 | ||
| 41 | /** The Log to which logging calls will be made. */ |
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| 42 | 0 | private static final Log log = LogFactory.getLog(DynamicTag.class); |
| 43 | ||
| 44 | /** The template script */ |
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| 45 | private Script template; |
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| 46 | ||
| 47 | /** The instance attributes */ |
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| 48 | 0 | private Map attributes = new HashMap(); |
| 49 | ||
| 50 | 0 | public DynamicTag() { |
| 51 | 0 | } |
| 52 | ||
| 53 | 0 | public DynamicTag(Script template) { |
| 54 | 0 | this.template = template; |
| 55 | 0 | } |
| 56 | ||
| 57 | ||
| 58 | // Tag interface |
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| 59 | //------------------------------------------------------------------------- |
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| 60 | public void doTag(XMLOutput output) throws JellyTagException { |
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| 61 | 0 | if ( log.isDebugEnabled() ) { |
| 62 | 0 | log.debug("Invoking dynamic tag with attributes: " + attributes); |
| 63 | } |
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| 64 | 0 | attributes.put("org.apache.commons.jelly.body", getBody()); |
| 65 | ||
| 66 | // create new context based on current attributes |
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| 67 | 0 | JellyContext newJellyContext = context.newJellyContext(attributes); |
| 68 | 0 | Map attrMap = new HashMap(); |
| 69 | 0 | for ( Iterator keyIter = this.attributes.keySet().iterator(); |
| 70 | 0 | keyIter.hasNext();) { |
| 71 | 0 | String key = (String) keyIter.next(); |
| 72 | 0 | if ( key.endsWith( "Attr" ) ) { |
| 73 | 0 | Object value = this.attributes.get( key ); |
| 74 | 0 | attrMap.put( key, value ); |
| 75 | 0 | attrMap.put( key.substring( 0, key.length()-4 ), value ); |
| 76 | } |
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| 77 | 0 | } |
| 78 | 0 | newJellyContext.setVariable( "attrs", attrMap ); |
| 79 | 0 | getTemplate().run(newJellyContext, output); |
| 80 | 0 | } |
| 81 | ||
| 82 | // DynaTag interface |
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| 83 | //------------------------------------------------------------------------- |
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| 84 | public void setAttribute(String name, Object value) { |
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| 85 | 0 | attributes.put(name, value); |
| 86 | 0 | attributes.put(name + "Attr", value); |
| 87 | 0 | } |
| 88 | ||
| 89 | // Properties |
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| 90 | //------------------------------------------------------------------------- |
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| 91 | /** The template to be executed by this tag which may well |
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| 92 | * invoke this instances body from inside the template |
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| 93 | */ |
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| 94 | public Script getTemplate() { |
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| 95 | 0 | return template; |
| 96 | } |
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| 97 | ||
| 98 | public void setTemplate(Script template) { |
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| 99 | 0 | this.template = template; |
| 100 | 0 | } |
| 101 | } |
| This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |