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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. |