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org.apache.commons.jelly.tags.bsf.BSFExpressionFactory |
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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.tags.bsf; |
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17 | ||
18 | import org.apache.commons.jelly.JellyException; |
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19 | import org.apache.commons.jelly.expression.Expression; |
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20 | import org.apache.commons.jelly.expression.ExpressionFactory; |
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21 | import org.apache.commons.logging.Log; |
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22 | import org.apache.commons.logging.LogFactory; |
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23 | ||
24 | import org.apache.bsf.BSFEngine; |
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25 | import org.apache.bsf.BSFException; |
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26 | import org.apache.bsf.BSFManager; |
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27 | ||
28 | /** Represents a factory of BSF expressions |
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29 | * |
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30 | * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
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31 | * @version $Revision: 1.6 $ |
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32 | */ |
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33 | public class BSFExpressionFactory implements ExpressionFactory { |
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34 | ||
35 | /** The logger of messages */ |
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36 | 0 | private Log log = LogFactory.getLog( getClass() ); |
37 | ||
38 | 0 | private String language = "javascript"; |
39 | private BSFManager manager; |
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40 | private BSFEngine engine; |
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41 | 0 | private JellyContextRegistry registry = new JellyContextRegistry(); |
42 | ||
43 | 0 | public BSFExpressionFactory() { |
44 | 0 | } |
45 | ||
46 | // Properties |
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47 | //------------------------------------------------------------------------- |
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48 | ||
49 | /** @return the BSF language to be used */ |
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50 | public String getLanguage() { |
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51 | 0 | return language; |
52 | } |
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53 | ||
54 | public void setLanguage(String language) { |
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55 | 0 | this.language = language; |
56 | 0 | } |
57 | ||
58 | /** @return the BSF Engine to be used by this expression factory */ |
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59 | public BSFEngine getBSFEngine() throws BSFException { |
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60 | 0 | if ( engine == null ) { |
61 | 0 | engine = createBSFEngine(); |
62 | } |
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63 | 0 | return engine; |
64 | } |
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65 | ||
66 | public void setBSFEngine(BSFEngine engine) { |
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67 | 0 | this.engine = engine; |
68 | 0 | } |
69 | ||
70 | public BSFManager getBSFManager() { |
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71 | 0 | if ( manager == null ) { |
72 | 0 | manager = createBSFManager(); |
73 | 0 | manager.setObjectRegistry( registry ); |
74 | } |
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75 | 0 | return manager; |
76 | } |
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77 | ||
78 | public void setBSFManager(BSFManager manager) { |
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79 | 0 | this.manager = manager; |
80 | 0 | manager.setObjectRegistry( registry ); |
81 | 0 | } |
82 | ||
83 | // ExpressionFactory interface |
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84 | //------------------------------------------------------------------------- |
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85 | public Expression createExpression(String text) throws JellyException { |
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86 | try { |
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87 | 0 | return new BSFExpression( text, getBSFEngine(), getBSFManager(), registry ); |
88 | } catch (BSFException e) { |
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89 | 0 | throw new JellyException("Could not obtain BSF engine",e); |
90 | } |
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91 | } |
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92 | ||
93 | // Implementation methods |
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94 | //------------------------------------------------------------------------- |
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95 | ||
96 | /** Factory method */ |
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97 | protected BSFEngine createBSFEngine() throws BSFException { |
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98 | 0 | return getBSFManager().loadScriptingEngine( getLanguage() ); |
99 | } |
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100 | ||
101 | /** Factory method */ |
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102 | protected BSFManager createBSFManager() { |
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103 | 0 | BSFManager answer = new BSFManager(); |
104 | 0 | return answer; |
105 | } |
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106 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |