ObjectUtility.java revision 608:7e06bf1dcb09 
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
26package com.sun.corba.se.impl.orbutil;
27
28import java.security.PrivilegedAction;
29import java.security.AccessController;
30import java.util.ArrayList;
31import java.util.Arrays;
32import java.util.Map;
33import java.util.List;
34import java.util.ListIterator;
35import java.util.Set;
36import java.util.Map.Entry;
37import java.util.Collection;
38import java.util.HashMap;
39import java.util.HashSet;
40import java.util.Hashtable;
41import java.util.Iterator;
42import java.util.Enumeration;
43import java.util.Properties;
44import java.util.IdentityHashMap;
45import java.lang.reflect.Array;
46import java.lang.reflect.Field;
47import java.lang.reflect.Method;
48import java.lang.reflect.Modifier;
49import java.math.BigInteger ;
50import java.math.BigDecimal ;
51
52public 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}
88