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org.apache.commons.jelly.tags.core.BaseClassLoaderTag |
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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.core; |
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17 | ||
18 | import org.apache.commons.jelly.TagSupport; |
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19 | import org.apache.commons.jelly.util.ClassLoaderUtils; |
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20 | ||
21 | /** Abstract base tag providing {@link ClassLoader} support. |
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22 | * |
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23 | * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
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24 | * @author Rodney Waldhoff |
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25 | * @version $Revision: 1.5 $ |
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26 | */ |
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27 | 328 | public abstract class BaseClassLoaderTag extends TagSupport { |
28 | /** |
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29 | * The class loader to use for instantiating application objects. |
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30 | * If not specified, the context class loader, or the class loader |
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31 | * used to load XMLParser itself, is used, based on the value of the |
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32 | * <code>useContextClassLoader</code> variable. |
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33 | */ |
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34 | 164 | protected ClassLoader classLoader = null; |
35 | ||
36 | /** |
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37 | * Do we want to use the Context ClassLoader when loading classes |
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38 | * for instantiating new objects? Default is <code>false</code>. |
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39 | */ |
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40 | 164 | protected boolean useContextClassLoader = false; |
41 | ||
42 | /** |
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43 | * Return the class loader to be used for instantiating application objects |
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44 | * when required. This is determined based upon the following rules: |
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45 | * <ul> |
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46 | * <li>The class loader set by <code>setClassLoader()</code>, if any</li> |
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47 | * <li>The thread context class loader, if it exists and the |
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48 | * <code>useContextClassLoader</code> property is set to true</li> |
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49 | * <li>The class loader used to load the XMLParser class itself. |
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50 | * </ul> |
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51 | */ |
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52 | public ClassLoader getClassLoader() { |
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53 | 74 | return ClassLoaderUtils.getClassLoader(classLoader, useContextClassLoader, getClass()); |
54 | } |
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55 | ||
56 | /** |
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57 | * Set the class loader to be used for instantiating application objects |
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58 | * when required. |
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59 | * |
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60 | * @param classLoader The new class loader to use, or <code>null</code> |
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61 | * to revert to the standard rules |
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62 | */ |
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63 | public void setClassLoader(ClassLoader classLoader) { |
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64 | 0 | this.classLoader = classLoader; |
65 | 0 | } |
66 | ||
67 | /** |
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68 | * Return the boolean as to whether the context classloader should be used. |
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69 | */ |
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70 | public boolean getUseContextClassLoader() { |
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71 | 0 | return useContextClassLoader; |
72 | } |
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73 | ||
74 | /** |
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75 | * Determine whether to use the Context ClassLoader (the one found by |
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76 | * calling <code>Thread.currentThread().getContextClassLoader()</code>) |
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77 | * to resolve/load classes. If not |
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78 | * using Context ClassLoader, then the class-loading defaults to |
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79 | * using the calling-class' ClassLoader. |
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80 | * |
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81 | * @param boolean determines whether to use JellyContext ClassLoader. |
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82 | */ |
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83 | public void setUseContextClassLoader(boolean use) { |
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84 | 0 | useContextClassLoader = use; |
85 | 0 | } |
86 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |