1 /* |
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2 * Copyright (c) 2003, 2009, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package java.beans; |
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26 |
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27 import java.lang.reflect.Field; |
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28 |
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29 /** |
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30 * A utility class for reflectively finding methods, constuctors and fields |
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31 * using reflection. |
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32 */ |
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33 class ReflectionUtils { |
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34 |
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35 @SuppressWarnings("rawtypes") |
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36 public static boolean isPrimitive(Class type) { |
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37 return primitiveTypeFor(type) != null; |
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38 } |
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39 |
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40 @SuppressWarnings("rawtypes") |
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41 public static Class primitiveTypeFor(Class wrapper) { |
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42 if (wrapper == Boolean.class) return Boolean.TYPE; |
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43 if (wrapper == Byte.class) return Byte.TYPE; |
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44 if (wrapper == Character.class) return Character.TYPE; |
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45 if (wrapper == Short.class) return Short.TYPE; |
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46 if (wrapper == Integer.class) return Integer.TYPE; |
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47 if (wrapper == Long.class) return Long.TYPE; |
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48 if (wrapper == Float.class) return Float.TYPE; |
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49 if (wrapper == Double.class) return Double.TYPE; |
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50 if (wrapper == Void.class) return Void.TYPE; |
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51 return null; |
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52 } |
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53 |
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54 /** |
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55 * Returns the value of a private field. |
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56 * |
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57 * @param instance object instance |
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58 * @param cls class |
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59 * @param name name of the field |
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60 * @param el an exception listener to handle exceptions; or null |
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61 * @return value of the field; null if not found or an error is encountered |
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62 */ |
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63 @SuppressWarnings("rawtypes") |
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64 public static Object getPrivateField(Object instance, Class cls, |
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65 String name, ExceptionListener el) { |
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66 try { |
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67 Field f = cls.getDeclaredField(name); |
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68 f.setAccessible(true); |
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69 return f.get(instance); |
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70 } |
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71 catch (Exception e) { |
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72 if (el != null) { |
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73 el.exceptionThrown(e); |
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74 } |
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75 } |
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76 return null; |
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77 } |
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78 } |
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