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org.apache.commons.jelly.tags.define.DynaBeanTag |
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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 | ||
17 | package org.apache.commons.jelly.tags.define; |
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18 | ||
19 | import java.util.HashMap; |
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20 | import java.util.Map; |
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21 | ||
22 | import org.apache.commons.beanutils.DynaClass; |
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23 | import org.apache.commons.jelly.JellyTagException; |
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24 | import org.apache.commons.jelly.MissingAttributeException; |
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25 | import org.apache.commons.jelly.Tag; |
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26 | import org.apache.commons.jelly.XMLOutput; |
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27 | import org.apache.commons.jelly.impl.Attribute; |
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28 | import org.apache.commons.jelly.impl.DynamicDynaBeanTag; |
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29 | import org.apache.commons.jelly.impl.TagFactory; |
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30 | import org.apache.commons.logging.Log; |
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31 | import org.apache.commons.logging.LogFactory; |
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32 | import org.xml.sax.Attributes; |
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33 | ||
34 | /** |
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35 | * Binds a Java bean to the given named Jelly tag so that the attributes of |
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36 | * the tag set the bean properties.. |
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37 | * |
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38 | * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
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39 | * @version $Revision: 155420 $ |
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40 | */ |
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41 | 6 | public class DynaBeanTag extends DefineTagSupport { |
42 | ||
43 | /** The Log to which logging calls will be made. */ |
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44 | 18 | private static final Log log = LogFactory.getLog(DynaBeanTag.class); |
45 | ||
46 | /** An empty Map as I think Collections.EMPTY_MAP is only JDK 1.3 onwards */ |
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47 | 9 | private static final Map EMPTY_MAP = new HashMap(); |
48 | ||
49 | /** the name of the tag to create */ |
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50 | private String name; |
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51 | ||
52 | /** the DyanClass to bind to the tag */ |
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53 | private DynaClass dynaClass; |
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54 | ||
55 | /** the name of the attribute used for the variable name */ |
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56 | 3 | private String varAttribute = "var"; |
57 | ||
58 | /** the attribute definitions for this dynamic tag */ |
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59 | private Map attributes; |
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60 | ||
61 | /** |
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62 | * Adds a new attribute definition to this dynamic tag |
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63 | */ |
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64 | public void addAttribute(Attribute attribute) { |
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65 | 0 | if ( attributes == null ) { |
66 | 0 | attributes = new HashMap(); |
67 | } |
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68 | 0 | attributes.put( attribute.getName(), attribute ); |
69 | 0 | } |
70 | ||
71 | // Tag interface |
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72 | //------------------------------------------------------------------------- |
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73 | public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException { |
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74 | 3 | invokeBody(output); |
75 | ||
76 | 3 | if (name == null) { |
77 | 0 | throw new MissingAttributeException("name"); |
78 | } |
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79 | 3 | if (dynaClass == null) { |
80 | 0 | throw new MissingAttributeException("dynaClass"); |
81 | } |
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82 | ||
83 | 3 | final DynaClass theDynaClass = dynaClass; |
84 | 3 | final Map beanAttributes = (attributes != null) ? attributes : EMPTY_MAP; |
85 | ||
86 | 3 | TagFactory factory = new TagFactory() { |
87 | public Tag createTag(String name, Attributes attributes) { |
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88 | return new DynamicDynaBeanTag(theDynaClass, beanAttributes, varAttribute); |
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89 | } |
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90 | }; |
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91 | 3 | getTagLibrary().registerBeanTag(name, factory); |
92 | ||
93 | // now lets clear the attributes for next invocation and help the GC |
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94 | 3 | attributes = null; |
95 | 3 | } |
96 | ||
97 | ||
98 | // Properties |
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99 | //------------------------------------------------------------------------- |
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100 | ||
101 | /** |
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102 | * Sets the name of the tag to create |
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103 | */ |
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104 | public void setName(String name) { |
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105 | 3 | this.name = name; |
106 | 3 | } |
107 | ||
108 | /** |
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109 | * Sets the name of the attribute used to define the bean variable that this dynamic |
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110 | * tag will output its results as. This defaults to 'var' though this property |
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111 | * can be used to change this if it conflicts with a bean property called 'var'. |
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112 | */ |
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113 | public void setVarAttribute(String varAttribute) { |
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114 | 0 | this.varAttribute = varAttribute; |
115 | 0 | } |
116 | ||
117 | /** |
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118 | * Returns the dynaClass. |
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119 | * @return DynaClass |
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120 | */ |
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121 | public DynaClass getDynaClass() { |
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122 | 0 | return dynaClass; |
123 | } |
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124 | ||
125 | /** |
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126 | * Sets the {@link DynaClass} which will be bound to this dynamic tag. |
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127 | */ |
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128 | public void setDynaClass(DynaClass dynaClass) { |
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129 | 3 | this.dynaClass = dynaClass; |
130 | 3 | } |
131 | ||
132 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |