Classes in this File | Line Coverage | Branch Coverage | Complexity | |||||||
ScriptParser |
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| 1.0;1 |
1 | // Copyright 2004, 2005 The Apache Software Foundation |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | ||
15 | package org.apache.tapestry.script; |
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16 | ||
17 | import org.apache.hivemind.ClassResolver; |
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18 | import org.apache.hivemind.Resource; |
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19 | import org.apache.tapestry.IScript; |
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20 | import org.apache.tapestry.coerce.ValueConverter; |
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21 | import org.apache.tapestry.services.ExpressionEvaluator; |
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22 | import org.apache.tapestry.util.xml.RuleDirectedParser; |
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23 | ||
24 | /** |
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25 | * Parses a Tapestry Script, an XML file defined by one of the following public |
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26 | * identifiers: |
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27 | * <ul> |
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28 | * <li><code>-//Primix Solutions//Tapestry Script 1.0//EN</code></li> |
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29 | * <li><code>-//Howard Ship//Tapestry Script 1.1//EN</code></li> |
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30 | * <li><code>-//Howard Lewis Ship//Tapestry Script 1.2//EN</code></li> |
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31 | * </ul> |
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32 | * <p> |
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33 | * The version 1.1, is largely backwards compatible to the old script, but adds |
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34 | * a number of new features (if, if-not, foreach and the use of property paths |
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35 | * with insert). |
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36 | * <p> |
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37 | * Version 1.2 removes the <insert> element, using an Ant-like syntax ( |
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38 | * <code>${<i>expression</i>}</code>). It also replaces the attribute name |
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39 | * <code>property-path</code> with <code>expression</code> (because OGNL is |
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40 | * used). |
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41 | * <p> |
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42 | * A Tapestry Script is used, in association with the |
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43 | * {@link org.apache.tapestry.html.Body}and/or |
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44 | * {@link org.apache.tapestry.html.Script}components, to generate JavaScript |
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45 | * for use with a Tapestry component. Two seperate pieces of JavaScript can be |
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46 | * generated. The body section (associated with the <code>body</code> element |
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47 | * of the XML document) is typically used to define JavaScript functions (most |
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48 | * often, event handlers). The initialization section (associated with the |
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49 | * <code>initialization</code> element of the XML document) is used to add |
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50 | * JavaScript that will be evaluated when the page finishes loading (i.e., from |
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51 | * the HTML <body> element's onLoad event handler). |
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52 | * |
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53 | * @author Howard Lewis Ship |
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54 | */ |
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55 | ||
56 | public class ScriptParser |
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57 | { |
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58 | public static final String SCRIPT_DTD_1_0_PUBLIC_ID = "-//Primix Solutions//Tapestry Script 1.0//EN"; |
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59 | ||
60 | public static final String SCRIPT_DTD_1_1_PUBLIC_ID = "-//Howard Ship//Tapestry Script 1.1//EN"; |
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61 | ||
62 | public static final String SCRIPT_DTD_1_2_PUBLIC_ID = "-//Howard Lewis Ship//Tapestry Script 1.2//EN"; |
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63 | ||
64 | /** @since 3.0 */ |
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65 | public static final String SCRIPT_DTD_3_0_PUBLIC_ID = "-//Apache Software Foundation//Tapestry Script Specification 3.0//EN"; |
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66 | ||
67 | /** @since 4.1 */ |
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68 | public static final String SCRIPT_DTD_4_0_PUBLIC_ID = "-//Apache Software Foundation//Tapestry Script Specification 4.0//EN"; |
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69 | ||
70 | private RuleDirectedParser _parser; |
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71 | ||
72 | public ScriptParser(ClassResolver resolver, ExpressionEvaluator evaluator, ValueConverter valueConverter) |
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73 | 16 | { |
74 | 16 | _parser = new RuleDirectedParser(); |
75 | ||
76 | 16 | _parser.registerEntity(SCRIPT_DTD_1_0_PUBLIC_ID, |
77 | "/org/apache/tapestry/script/Script_1_0.dtd"); |
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78 | 16 | _parser.registerEntity(SCRIPT_DTD_1_1_PUBLIC_ID, |
79 | "/org/apache/tapestry/script/Script_1_1.dtd"); |
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80 | 16 | _parser.registerEntity(SCRIPT_DTD_1_2_PUBLIC_ID, |
81 | "/org/apache/tapestry/script/Script_1_2.dtd"); |
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82 | 16 | _parser.registerEntity(SCRIPT_DTD_3_0_PUBLIC_ID, |
83 | "/org/apache/tapestry/script/Script_3_0.dtd"); |
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84 | 16 | _parser.registerEntity(SCRIPT_DTD_4_0_PUBLIC_ID, |
85 | "/org/apache/tapestry/script/Script_4_0.dtd"); |
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86 | ||
87 | 16 | _parser.addRule("script", new ScriptRule(evaluator, valueConverter)); |
88 | 16 | _parser.addRule("let", new LetRule()); |
89 | 16 | _parser.addRule("set", new SetRule()); |
90 | 16 | _parser.addRule("include-script", new IncludeScriptRule()); |
91 | 16 | _parser.addRule("input-symbol", new InputSymbolRule(resolver)); |
92 | 16 | _parser.addRule("body", new BodyRule()); |
93 | 16 | _parser.addRule("initialization", new InitRule()); |
94 | 16 | _parser.addRule("if", new IfRule(true)); |
95 | 16 | _parser.addRule("if-not", new IfRule(false)); |
96 | 16 | _parser.addRule("foreach", new ForeachRule()); |
97 | 16 | _parser.addRule("unique", new UniqueRule()); |
98 | ||
99 | // This will go away when the 1.1 and earler DTDs are retired. |
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100 | 16 | _parser.addRule("insert", new InsertRule()); |
101 | ||
102 | 16 | } |
103 | ||
104 | /** |
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105 | * Parses the given input stream to produce a parsed script, ready to |
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106 | * execute. |
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107 | */ |
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108 | ||
109 | public IScript parse(Resource resourceLocation) |
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110 | { |
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111 | 16 | return (IScript) _parser.parse(resourceLocation); |
112 | } |
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113 | ||
114 | } |