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org.apache.commons.jelly.tags.regexp.RegexpTag |
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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.regexp; |
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17 | ||
18 | import org.apache.commons.jelly.TagSupport; |
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19 | import org.apache.commons.jelly.XMLOutput; |
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20 | import org.apache.commons.jelly.MissingAttributeException; |
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21 | import org.apache.commons.jelly.JellyTagException; |
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22 | import org.apache.oro.text.regex.Perl5Matcher; |
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23 | import org.apache.oro.text.regex.Perl5Compiler; |
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24 | import org.apache.oro.text.regex.Pattern; |
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25 | import org.apache.oro.text.regex.MalformedPatternException; |
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26 | ||
27 | /** |
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28 | * Base class for tags using the Oro Regexp library. |
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29 | * |
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30 | * @author <a href="mailto:christian@inx-soft.com">Christian Amor Kvalheim</a> |
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31 | * @version $Revision: 1.1 $ |
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32 | */ |
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33 | 0 | public abstract class RegexpTag extends TagSupport { |
34 | 0 | private Perl5Matcher patternMatcher = new Perl5Matcher(); |
35 | private Pattern pattern; |
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36 | private String var; |
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37 | private String text; |
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38 | private String scope; |
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39 | ||
40 | protected final String getText() { |
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41 | 0 | return text; |
42 | } |
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43 | ||
44 | protected final Pattern getPattern() { |
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45 | 0 | return pattern; |
46 | } |
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47 | ||
48 | protected final Perl5Matcher getPatternMatcher() { |
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49 | 0 | return patternMatcher; |
50 | } |
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51 | ||
52 | public final void setExpr(String expr) throws MalformedPatternException { |
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53 | 0 | Perl5Compiler patternCompiler = new Perl5Compiler(); |
54 | 0 | pattern = patternCompiler.compile(expr); |
55 | 0 | } |
56 | ||
57 | public final void setText(String text) { |
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58 | 0 | this.text = text; |
59 | 0 | } |
60 | ||
61 | // Sets the variable name to define for this expression |
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62 | public final void setVar(String var) { |
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63 | 0 | this.var = class="keyword">var; |
64 | 0 | } |
65 | ||
66 | /** |
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67 | * Sets the variable scope for this variable. For example setting this value to 'parent' will |
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68 | * set this value in the parent scope. When Jelly is run from inside a Servlet environment |
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69 | * then other scopes will be available such as 'request', 'session' or 'application'. |
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70 | * |
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71 | * Other applications may implement their own custom scopes. |
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72 | */ |
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73 | public final void setScope(String scope) { |
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74 | 0 | this.scope = scope; |
75 | 0 | } |
76 | ||
77 | public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException { |
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78 | // Check required properties |
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79 | 0 | if (getText() == null || getText().length() == 0) |
80 | 0 | throw new MissingAttributeException("text must be provided"); |
81 | ||
82 | 0 | if (pattern == null) |
83 | 0 | throw new MissingAttributeException("expr must be provided"); |
84 | ||
85 | 0 | if (var == null || class="keyword">var.length() == 0) |
86 | 0 | throw new MissingAttributeException("var must be provided"); |
87 | ||
88 | // Evaluate pattern against text string |
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89 | 0 | boolean result = getResult(); |
90 | 0 | String resultString = result ? "true" : "false"; |
91 | ||
92 | 0 | if (var != null) { |
93 | 0 | if (scope != null) { |
94 | 0 | context.setVariable(var, scope, resultString); |
95 | } else { |
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96 | 0 | context.setVariable(var, resultString); |
97 | } |
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98 | } |
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99 | 0 | } |
100 | ||
101 | protected abstract boolean getResult(); |
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102 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |