libjava/java/lang/reflect/Array.java

   1 // FileDescriptor.java - Open file or device
   2
   3 /* Copyright (C) 1999  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 package java.lang.reflect;
  12
  13 /**
  14  * @author Per Bothner <bothner@cygnus.com>
  15  * @date january 12, 1999
  16  */
  17
  18 /* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3.
  19  * Status:  Believe complete and correct.
  20  */
  21
  22 public final class Array
  23 {
  24   Array () { }
  25
  26   public static native Object newInstance(Class componentType, int length);
  27   public static native Object newInstance(Class elementType, int[] dimensions);
  28   public static native int getLength (Object array);
  29
  30   public static native Object  get (Object array, int index);
  31   public static native char    getChar (Object array, int index);
  32   public static native byte    getByte (Object array, int index);
  33   public static native short   getShort (Object array, int index);
  34   public static native int     getInt (Object array, int index);
  35   public static native long    getLong (Object array, int index);
  36   public static native float   getFloat (Object array, int index);
  37   public static native double  getDouble (Object array, int index);
  38   public static native boolean getBoolean (Object array, int index);
  39
  40   private static native Class getElementType (Object array, int index);
  41
  42   private static native void set (Object array, int index,
  43                                   Object value, Class elType);
  44
  45   public static void set (Object array, int index, Object value)
  46   {
  47     Class elType = getElementType(array, index);
  48     if (! elType.isPrimitive())
  49       set(array, index, value, elType);
  50     else if (value instanceof Byte)
  51       setByte(array, index, ((Byte) value).byteValue());
  52     else if (value instanceof Short)
  53       setShort (array, index, ((Short) value).shortValue());
  54     else if (value instanceof Integer)
  55       setInt(array, index, ((Integer) value).intValue());
  56     else if (value instanceof Long)
  57       setLong(array, index, ((Long) value).longValue());
  58     else if (value instanceof Float)
  59       setFloat(array, index, ((Float) value).floatValue());
  60     else if (value instanceof Double)
  61       setDouble(array, index, ((Double) value).doubleValue());
  62     else if (value instanceof Character)
  63       setChar(array, index, ((Character) value).charValue());
  64     else if (value instanceof Boolean)
  65       setBoolean(array, index, ((Boolean) value).booleanValue());
  66     else
  67       throw new IllegalArgumentException();
  68   }
  69
  70   public static native void setByte   (Object array, int index, byte value);
  71   public static native void setShort  (Object array, int index, short value);
  72   public static native void setInt    (Object array, int index, int value);
  73   public static native void setLong   (Object array, int index, long value);
  74   public static native void setFloat  (Object array, int index, float value);
  75   public static native void setDouble (Object array, int index, double value);
  76   public static native void setChar   (Object array, int index, char value);
  77   public static native void setBoolean(Object array, int index, boolean value);
  78 }