| 1 | /* |
| 2 | * Copyright (c) 2009 The JOMC Project |
| 3 | * Copyright (c) 2005 Christian Schulte <schulte2005@users.sourceforge.net> |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * |
| 10 | * o Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * |
| 13 | * o Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in |
| 15 | * the documentation and/or other materials provided with the |
| 16 | * distribution. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE JOMC PROJECT AND CONTRIBUTORS "AS IS" |
| 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 20 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 21 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE JOMC PROJECT OR |
| 22 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 23 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 24 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 25 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 26 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 27 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 28 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | * |
| 30 | * $Id: ReflectionHelper.java 2083 2010-06-24 00:53:49Z schulte2005 $ |
| 31 | * |
| 32 | */ |
| 33 | package org.jomc.sdk.model; |
| 34 | |
| 35 | import java.lang.reflect.InvocationTargetException; |
| 36 | import java.text.MessageFormat; |
| 37 | import java.util.Locale; |
| 38 | import java.util.ResourceBundle; |
| 39 | import org.jomc.model.PropertyException; |
| 40 | |
| 41 | /** |
| 42 | * Provides package private static helper methods for accessing objects using reflection. |
| 43 | * |
| 44 | * @author <a href="mailto:schulte2005@users.sourceforge.net">Christian Schulte</a> |
| 45 | * @version $Id: ReflectionHelper.java 2083 2010-06-24 00:53:49Z schulte2005 $ |
| 46 | */ |
| 47 | abstract class ReflectionHelper |
| 48 | { |
| 49 | |
| 50 | private static String GET_JAVA_VALUE = "getJavaValue"; |
| 51 | |
| 52 | ReflectionHelper() |
| 53 | { |
| 54 | super(); |
| 55 | } |
| 56 | |
| 57 | static java.lang.Object getJavaValue( final ClassLoader classLoader, final Object o ) throws PropertyException |
| 58 | { |
| 59 | if ( o != null ) |
| 60 | { |
| 61 | try |
| 62 | { |
| 63 | return o.getClass().getMethod( GET_JAVA_VALUE, ClassLoader.class ).invoke( o, classLoader ); |
| 64 | } |
| 65 | catch ( final IllegalAccessException e ) |
| 66 | { |
| 67 | throw new PropertyException( getMessage( |
| 68 | "methodAccessDenied", GET_JAVA_VALUE, o.getClass().getName() ), e ); |
| 69 | |
| 70 | } |
| 71 | catch ( final IllegalArgumentException e ) |
| 72 | { |
| 73 | throw new AssertionError( e ); |
| 74 | } |
| 75 | catch ( final InvocationTargetException e ) |
| 76 | { |
| 77 | throw new PropertyException( getMessage( |
| 78 | "methodInvocationFailure", GET_JAVA_VALUE, o.getClass().getName() ), e ); |
| 79 | |
| 80 | } |
| 81 | catch ( final SecurityException e ) |
| 82 | { |
| 83 | throw new PropertyException( getMessage( |
| 84 | "methodAccessDenied", GET_JAVA_VALUE, o.getClass().getName() ), e ); |
| 85 | |
| 86 | } |
| 87 | catch ( final NoSuchMethodException e ) |
| 88 | { |
| 89 | // Optional method not provided. |
| 90 | return o; |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | return o; |
| 95 | } |
| 96 | |
| 97 | static <T> T getJavaValue( final ClassLoader classLoader, final Object o, final Class<T> returnType ) |
| 98 | throws PropertyException |
| 99 | { |
| 100 | final Object javaValue = getJavaValue( classLoader, o ); |
| 101 | |
| 102 | if ( javaValue != null && !returnType.isAssignableFrom( javaValue.getClass() ) ) |
| 103 | { |
| 104 | throw new PropertyException( getMessage( |
| 105 | "illegalMethodInvocationResult", GET_JAVA_VALUE, o.getClass().getName(), javaValue.getClass().getName(), |
| 106 | returnType.getName() ) ); |
| 107 | |
| 108 | } |
| 109 | |
| 110 | return (T) javaValue; |
| 111 | } |
| 112 | |
| 113 | static <T> T getJavaValue( final Class<T> type, final String value ) throws PropertyException |
| 114 | { |
| 115 | if ( value != null ) |
| 116 | { |
| 117 | try |
| 118 | { |
| 119 | if ( type == Character.class ) |
| 120 | { |
| 121 | if ( value.length() != 1 ) |
| 122 | { |
| 123 | throw new PropertyException( getMessage( "illegalValue", value, Character.class.getName() ) ); |
| 124 | } |
| 125 | |
| 126 | return type.getConstructor( new Class[] |
| 127 | { |
| 128 | char.class |
| 129 | } ).newInstance( new java.lang.Object[] |
| 130 | { |
| 131 | value.charAt( 0 ) |
| 132 | } ); |
| 133 | |
| 134 | } |
| 135 | else if ( type == String.class ) |
| 136 | { |
| 137 | return (T) value; |
| 138 | } |
| 139 | else |
| 140 | { |
| 141 | return type.getConstructor( new Class[] |
| 142 | { |
| 143 | String.class |
| 144 | } ).newInstance( value ); |
| 145 | |
| 146 | } |
| 147 | } |
| 148 | catch ( final InstantiationException e ) |
| 149 | { |
| 150 | throw new PropertyException( getMessage( "instantiationException", type.getName() ), e ); |
| 151 | } |
| 152 | catch ( final IllegalAccessException e ) |
| 153 | { |
| 154 | throw new PropertyException( getMessage( "constructorAccessDenied", type.getName() ), e ); |
| 155 | } |
| 156 | catch ( final IllegalArgumentException e ) |
| 157 | { |
| 158 | throw new AssertionError( e ); |
| 159 | } |
| 160 | catch ( final InvocationTargetException e ) |
| 161 | { |
| 162 | throw new PropertyException( getMessage( "constructorInvocationFailure", type.getName() ), e ); |
| 163 | } |
| 164 | catch ( final NoSuchMethodException e ) |
| 165 | { |
| 166 | throw new PropertyException( getMessage( "constructorNotFound", type.getName() ), e ); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | return null; |
| 171 | } |
| 172 | |
| 173 | private static String getMessage( final String key, final java.lang.Object... arguments ) |
| 174 | { |
| 175 | return MessageFormat.format( ResourceBundle.getBundle( ReflectionHelper.class.getName().replace( '.', '/' ), |
| 176 | Locale.getDefault() ).getString( key ), arguments ); |
| 177 | |
| 178 | } |
| 179 | |
| 180 | } |