1 /*
   2  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.corba.se.impl.orbutil;
  27 
  28 import java.security.PrivilegedAction;
  29 import java.security.AccessController;
  30 import java.util.ArrayList;
  31 import java.util.Arrays;
  32 import java.util.Map;
  33 import java.util.List;
  34 import java.util.ListIterator;
  35 import java.util.Set;
  36 import java.util.Map.Entry;
  37 import java.util.Collection;
  38 import java.util.HashMap;
  39 import java.util.HashSet;
  40 import java.util.Hashtable;
  41 import java.util.Iterator;
  42 import java.util.Enumeration;
  43 import java.util.Properties;
  44 import java.util.IdentityHashMap;
  45 import java.lang.reflect.Array;
  46 import java.lang.reflect.Field;
  47 import java.lang.reflect.Method;
  48 import java.lang.reflect.Modifier;
  49 import java.math.BigInteger ;
  50 import java.math.BigDecimal ;
  51 
  52 public final class ObjectUtility {
  53     private ObjectUtility() {}
  54 
  55 
  56     /** If arr1 and arr2 are both arrays of the same component type,
  57      * return an array of that component type that consists of the
  58      * elements of arr1 followed by the elements of arr2.
  59      * Throws IllegalArgumentException otherwise.
  60      */
  61     public static Object concatenateArrays( Object arr1, Object arr2 )
  62     {
  63         Class comp1 = arr1.getClass().getComponentType() ;
  64         Class comp2 = arr2.getClass().getComponentType() ;
  65         int len1 = Array.getLength( arr1 ) ;
  66         int len2 = Array.getLength( arr2 ) ;
  67 
  68         if ((comp1 == null) || (comp2 == null))
  69             throw new IllegalStateException( "Arguments must be arrays" ) ;
  70         if (!comp1.equals( comp2 ))
  71             throw new IllegalStateException(
  72                 "Arguments must be arrays with the same component type" ) ;
  73 
  74         Object result = Array.newInstance( comp1, len1 + len2 ) ;
  75 
  76         int index = 0 ;
  77 
  78         for (int ctr=0; ctr<len1; ctr++)
  79             Array.set( result, index++, Array.get( arr1, ctr ) ) ;
  80 
  81         for (int ctr=0; ctr<len2; ctr++)
  82             Array.set( result, index++, Array.get( arr2, ctr ) ) ;
  83 
  84         return result ;
  85     }
  86 
  87 }