1/*
2 *  Licensed to the Apache Software Foundation (ASF) under one or more
3 *  contributor license agreements.  See the NOTICE file distributed with
4 *  this work for additional information regarding copyright ownership.
5 *  The ASF licenses this file to You under the Apache License, Version 2.0
6 *  (the "License"); you may not use this file except in compliance with
7 *  the License.  You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 */
17
18package java.nio;
19
20/**
21 * LongArrayBuffer, ReadWriteLongArrayBuffer and ReadOnlyLongArrayBuffer compose
22 * the implementation of array based long buffers.
23 * <p>
24 * ReadOnlyLongArrayBuffer extends LongArrayBuffer with all the write methods
25 * throwing read only exception.
26 * </p>
27 * <p>
28 * This class is marked final for runtime performance.
29 * </p>
30 *
31 */
32final class ReadOnlyLongArrayBuffer extends LongArrayBuffer {
33
34    static ReadOnlyLongArrayBuffer copy(LongArrayBuffer other, int markOfOther) {
35        ReadOnlyLongArrayBuffer buf = new ReadOnlyLongArrayBuffer(other
36                .capacity(), other.backingArray, other.offset);
37        buf.limit = other.limit();
38        buf.position = other.position();
39        buf.mark = markOfOther;
40        return buf;
41    }
42
43    ReadOnlyLongArrayBuffer(int capacity, long[] backingArray, int arrayOffset) {
44        super(capacity, backingArray, arrayOffset);
45    }
46
47    @Override
48    public LongBuffer asReadOnlyBuffer() {
49        return duplicate();
50    }
51
52    @Override
53    public LongBuffer compact() {
54        throw new ReadOnlyBufferException();
55    }
56
57    @Override
58    public LongBuffer duplicate() {
59        return copy(this, mark);
60    }
61
62    @Override
63    public boolean isReadOnly() {
64        return true;
65    }
66
67    @Override
68    protected long[] protectedArray() {
69        throw new ReadOnlyBufferException();
70    }
71
72    @Override
73    protected int protectedArrayOffset() {
74        throw new ReadOnlyBufferException();
75    }
76
77    @Override
78    protected boolean protectedHasArray() {
79        return false;
80    }
81
82    @Override
83    public LongBuffer put(long c) {
84        throw new ReadOnlyBufferException();
85    }
86
87    @Override
88    public LongBuffer put(int index, long c) {
89        throw new ReadOnlyBufferException();
90    }
91
92    @Override
93    public LongBuffer put(LongBuffer buf) {
94        throw new ReadOnlyBufferException();
95    }
96
97    @Override
98    public final LongBuffer put(long[] src, int off, int len) {
99        throw new ReadOnlyBufferException();
100    }
101
102    @Override
103    public LongBuffer slice() {
104        return new ReadOnlyLongArrayBuffer(remaining(), backingArray, offset
105                + position);
106    }
107
108}
109