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org.apache.commons.jelly.tags.define.JellyBeanTag |
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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.lang.reflect.Method; |
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20 | ||
21 | import org.apache.commons.beanutils.MethodUtils; |
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22 | ||
23 | import org.apache.commons.logging.Log; |
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24 | import org.apache.commons.logging.LogFactory; |
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25 | ||
26 | ||
27 | /** |
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28 | * Binds a Java bean to the given named Jelly tag so that the attributes of |
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29 | * the tag set the bean properties. After the body of this tag is invoked |
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30 | * then the beans invoke() method will be called, if the bean has one. |
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31 | * |
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32 | * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
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33 | * @version $Revision: 155420 $ |
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34 | */ |
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35 | 3 | public class JellyBeanTag extends BeanTag { |
36 | ||
37 | /** The Log to which logging calls will be made. */ |
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38 | 18 | private static final Log log = LogFactory.getLog(JellyBeanTag.class); |
39 | ||
40 | /** Empty parameter types for Method lookup */ |
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41 | 9 | private static final Class[] emptyParamTypes = {}; |
42 | ||
43 | /** the name of the method to invoke on the bean */ |
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44 | private String method; |
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45 | ||
46 | // Properties |
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47 | //------------------------------------------------------------------------- |
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48 | ||
49 | /** |
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50 | * @return the method name to use, which defaults to 'run' for Runnable |
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51 | * objects |
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52 | */ |
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53 | public String getMethod() { |
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54 | 3 | if ( method == null ) { |
55 | 3 | return "run"; |
56 | } |
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57 | 0 | return method; |
58 | } |
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59 | ||
60 | /** |
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61 | * Sets the name of the method to invoke on the bean. |
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62 | * This defaults to "run" so that Runnable objects can be |
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63 | * invoked, but this property can be set to whatever is required, |
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64 | * such as "execute" or "invoke" |
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65 | */ |
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66 | public void setMethod(String method) { |
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67 | 0 | this.method = method; |
68 | 0 | } |
69 | ||
70 | ||
71 | // Implementation methods |
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72 | //------------------------------------------------------------------------- |
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73 | ||
74 | protected Method getInvokeMethod( Class theClass ) { |
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75 | 3 | Method invokeMethod = |
76 | MethodUtils.getAccessibleMethod( |
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77 | theClass, |
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78 | getMethod(), |
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79 | emptyParamTypes); |
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80 | ||
81 | 3 | if ( invokeMethod == null ) { |
82 | } |
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83 | 3 | return invokeMethod; |
84 | } |
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85 | } |
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