1 /*
   2  * Copyright (c) 2012, 2014, Oracle and/or its affiliates.
   3  * All rights reserved. Use is subject to license terms.
   4  *
   5  * This file is available and licensed under the following license:
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  *  - Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *  - 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 distribution.
  16  *  - Neither the name of Oracle Corporation nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32 package com.oracle.javafx.scenebuilder.kit.metadata.util;
  33 
  34 import java.beans.BeanInfo;
  35 import java.beans.IntrospectionException;
  36 import java.beans.Introspector;
  37 import java.beans.PropertyDescriptor;
  38 import java.lang.reflect.InvocationTargetException;
  39 
  40 /**
  41  *
  42  */
  43 class BeanPropertyIntrospector {
  44 
  45     private final Object object;
  46     private final PropertyDescriptor[] propertyDescriptors;
  47 
  48     public BeanPropertyIntrospector(Object object) {
  49         assert object != null;
  50         this.object = object;
  51         try {
  52             final BeanInfo beanInfo = Introspector.getBeanInfo(object.getClass());
  53             this.propertyDescriptors = beanInfo.getPropertyDescriptors();
  54         } catch(IntrospectionException x) {
  55             throw new RuntimeException(x);
  56         }
  57     }
  58 
  59     public Object getValue(String propertyName) {
  60         final PropertyDescriptor d = findDescriptor(propertyName);
  61         final Object result;
  62 
  63         if (d != null) {
  64             try {
  65                 result = d.getReadMethod().invoke(object);
  66             } catch(InvocationTargetException|IllegalAccessException x) {
  67                 throw new RuntimeException(x);
  68             }
  69         } else {
  70             throw new RuntimeException(propertyName + " not found"); //NOI18N
  71         }
  72 
  73         return result;
  74     }
  75 
  76 
  77     public void setValue(String propertyName, Object value) {
  78         final PropertyDescriptor d = findDescriptor(propertyName);
  79 
  80         if (d != null) {
  81             try {
  82                 d.getWriteMethod().invoke(object, value);
  83             } catch(InvocationTargetException|IllegalAccessException x) {
  84                 throw new RuntimeException(x);
  85             }
  86         } else {
  87             throw new RuntimeException(propertyName + " not found"); //NOI18N
  88         }
  89     }
  90 
  91     private PropertyDescriptor findDescriptor(String propertyName) {
  92         assert propertyDescriptors != null;
  93         int i = 0;
  94         while ((i < propertyDescriptors.length)
  95                 && ! propertyDescriptors[i].getName().equals(propertyName)){
  96             i++;
  97         }
  98 
  99         return (i < propertyDescriptors.length) ? propertyDescriptors[i] : null;
 100     }
 101 }