1 /* DoubleBufferImpl.java --
2 Copyright (C) 2002, 2003 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING. If not, write to the
18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module. An independent module is a module which is not derived from
33 or based on this library. If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
42 * This is a Heap memory implementation
44 final class DoubleBufferImpl
extends DoubleBuffer
46 private boolean readOnly
;
48 DoubleBufferImpl (int capacity
)
50 this (new double [capacity
], 0, capacity
, capacity
, 0, -1, false);
53 DoubleBufferImpl (double[] buffer
, int offset
, int capacity
, int limit
, int position
, int mark
, boolean readOnly
)
55 super (buffer
, offset
, capacity
, limit
, position
, mark
);
56 this.readOnly
= readOnly
;
59 public boolean isReadOnly ()
64 public DoubleBuffer
slice ()
66 return new DoubleBufferImpl (backing_buffer
, array_offset
+ position (), remaining (), remaining (), 0, -1, isReadOnly ());
69 public DoubleBuffer
duplicate ()
71 return new DoubleBufferImpl (backing_buffer
, array_offset
, capacity (), limit (), position (), mark
, isReadOnly ());
74 public DoubleBuffer
asReadOnlyBuffer ()
76 return new DoubleBufferImpl (backing_buffer
, array_offset
, capacity (), limit (), position (), mark
, true);
79 public DoubleBuffer
compact ()
83 while (remaining () > 0)
93 public boolean isDirect ()
99 * Relative get method. Reads the next <code>double</code> from the buffer.
101 final public double get ()
103 double result
= backing_buffer
[position ()];
104 position (position () + 1);
109 * Relative put method. Writes <code>value</code> to the next position
112 * @exception ReadOnlyBufferException If this buffer is read-only.
114 final public DoubleBuffer
put (double value
)
117 throw new ReadOnlyBufferException ();
119 backing_buffer
[position ()] = value
;
120 position (position () + 1);
125 * Absolute get method. Reads the <code>double</code> at position
126 * <code>index</code>.
128 * @exception IndexOutOfBoundsException If index is negative or not smaller
129 * than the buffer's limit.
131 final public double get (int index
)
133 return backing_buffer
[index
];
137 * Absolute put method. Writes <code>value</value> to position
138 * <code>index</code> in the buffer.
140 * @exception IndexOutOfBoundsException If index is negative or not smaller
141 * than the buffer's limit.
142 * @exception ReadOnlyBufferException If this buffer is read-only.
144 final public DoubleBuffer
put (int index
, double value
)
147 throw new ReadOnlyBufferException ();
149 backing_buffer
[index
] = value
;
153 final public ByteOrder
order ()
155 return ByteOrder
.nativeOrder ();