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org.apache.commons.jelly.tags.swt.SwtHelper |
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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.swt; |
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17 | ||
18 | import java.lang.reflect.Field; |
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19 | import java.util.StringTokenizer; |
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20 | ||
21 | import org.apache.commons.jelly.JellyTagException; |
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22 | import org.apache.commons.jelly.tags.core.UseBeanTag; |
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23 | import org.apache.commons.logging.Log; |
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24 | import org.apache.commons.logging.LogFactory; |
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25 | ||
26 | /** |
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27 | * A helper class for working with SWT. |
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28 | * </p> |
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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 1.1 |
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32 | */ |
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33 | 0 | public class SwtHelper extends UseBeanTag { |
34 | ||
35 | /** The Log to which logging calls will be made. */ |
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36 | 0 | private static final Log log = LogFactory.getLog(SwtHelper.class); |
37 | ||
38 | ||
39 | /** |
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40 | * Parses the comma delimited String of style codes which are or'd |
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41 | * together. The given class describes the integer static constants |
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42 | * |
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43 | * @param constantClass is the type to look for static fields |
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44 | * @param text is a comma delimited text value such as "border, resize" |
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45 | * @return the int code |
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46 | */ |
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47 | public static int parseStyle(Class constantClass, String text) throws JellyTagException { |
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48 | 0 | return parseStyle(constantClass, text, true); |
49 | } |
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50 | ||
51 | /** |
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52 | * Parses the comma delimited String of style codes which are or'd |
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53 | * together. The given class describes the integer static constants |
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54 | * |
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55 | * @param constantClass is the type to look for static fields |
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56 | * @param text is a comma delimited text value such as "border, resize" |
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57 | * @param toUpperCase is whether the text should be converted to upper case |
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58 | * before its compared against the reflection fields |
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59 | * |
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60 | * @return the int code |
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61 | */ |
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62 | public static int parseStyle(Class constantClass, String text, boolean toUpperCase) throws JellyTagException{ |
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63 | 0 | int answer = 0; |
64 | 0 | if (text != null) { |
65 | 0 | if (toUpperCase) { |
66 | 0 | text = text.toUpperCase(); |
67 | } |
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68 | 0 | StringTokenizer items = new StringTokenizer(text, ","); |
69 | 0 | while (items.hasMoreTokens()) { |
70 | 0 | String token = items.nextToken().trim(); |
71 | 0 | answer |= getStyleCode(constantClass, token); |
72 | } |
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73 | } |
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74 | 0 | return answer; |
75 | } |
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76 | ||
77 | /** |
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78 | * @return the code for the given word or zero if the word doesn't match a |
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79 | * valid style |
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80 | */ |
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81 | public static int getStyleCode(Class constantClass,String text) throws JellyTagException { |
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82 | try { |
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83 | 0 | Field field = constantClass.getField(text); |
84 | 0 | if (field == null) { |
85 | 0 | log.warn( "Unknown style code: " + text +" will be ignored"); |
86 | 0 | return 0; |
87 | } |
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88 | 0 | return field.getInt(null); |
89 | } catch (NoSuchFieldException e) { |
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90 | 0 | throw new JellyTagException("The value: " + text + " is not understood", e); |
91 | } catch (IllegalAccessException e) { |
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92 | 0 | throw new JellyTagException("The value: " + text + " is not understood", e); |
93 | } |
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94 | } |
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95 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |