Source Code Cross Referenced for ReadOnlyHeapByteBuffer.java in  » Apache-Harmony-Java-SE » java-package » java » nio » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Apache Harmony Java SE » java package » java.nio 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Licensed to the Apache Software Foundation (ASF) under one or more
003:         *  contributor license agreements.  See the NOTICE file distributed with
004:         *  this work for additional information regarding copyright ownership.
005:         *  The ASF licenses this file to You under the Apache License, Version 2.0
006:         *  (the "License"); you may not use this file except in compliance with
007:         *  the License.  You may obtain a copy of the License at
008:         *
009:         *     http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         *  Unless required by applicable law or agreed to in writing, software
012:         *  distributed under the License is distributed on an "AS IS" BASIS,
013:         *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         *  See the License for the specific language governing permissions and
015:         *  limitations under the License.
016:         */
017:
018:        package java.nio;
019:
020:        /**
021:         * HeapByteBuffer, ReadWriteHeapByteBuffer and ReadOnlyHeapByteBuffer compose
022:         * the implementation of array based byte buffers.
023:         * <p>
024:         * ReadOnlyHeapByteBuffer extends HeapByteBuffer with all the write methods
025:         * throwing read only exception.
026:         * </p>
027:         * <p>
028:         * This class is marked final for runtime performance.
029:         * </p>
030:         * 
031:         */
032:        final class ReadOnlyHeapByteBuffer extends HeapByteBuffer {
033:
034:            static ReadOnlyHeapByteBuffer copy(HeapByteBuffer other,
035:                    int markOfOther) {
036:                ReadOnlyHeapByteBuffer buf = new ReadOnlyHeapByteBuffer(
037:                        other.backingArray, other.capacity(), other.offset);
038:                buf.limit = other.limit();
039:                buf.position = other.position();
040:                buf.mark = markOfOther;
041:                buf.order(other.order());
042:                return buf;
043:            }
044:
045:            ReadOnlyHeapByteBuffer(byte[] backingArray, int capacity,
046:                    int arrayOffset) {
047:                super (backingArray, capacity, arrayOffset);
048:            }
049:
050:            @Override
051:            public ByteBuffer asReadOnlyBuffer() {
052:                return copy(this , mark);
053:            }
054:
055:            @Override
056:            public ByteBuffer compact() {
057:                throw new ReadOnlyBufferException();
058:            }
059:
060:            @Override
061:            public ByteBuffer duplicate() {
062:                return copy(this , mark);
063:            }
064:
065:            @Override
066:            public boolean isReadOnly() {
067:                return true;
068:            }
069:
070:            @Override
071:            protected byte[] protectedArray() {
072:                throw new ReadOnlyBufferException();
073:            }
074:
075:            @Override
076:            protected int protectedArrayOffset() {
077:                throw new ReadOnlyBufferException();
078:            }
079:
080:            @Override
081:            protected boolean protectedHasArray() {
082:                return false;
083:            }
084:
085:            @Override
086:            public ByteBuffer put(byte b) {
087:                throw new ReadOnlyBufferException();
088:            }
089:
090:            @Override
091:            public ByteBuffer put(int index, byte b) {
092:                throw new ReadOnlyBufferException();
093:            }
094:
095:            @Override
096:            public ByteBuffer put(byte[] src, int off, int len) {
097:                throw new ReadOnlyBufferException();
098:            }
099:
100:            @Override
101:            public ByteBuffer putDouble(double value) {
102:                throw new ReadOnlyBufferException();
103:            }
104:
105:            @Override
106:            public ByteBuffer putDouble(int index, double value) {
107:                throw new ReadOnlyBufferException();
108:            }
109:
110:            @Override
111:            public ByteBuffer putFloat(float value) {
112:                throw new ReadOnlyBufferException();
113:            }
114:
115:            @Override
116:            public ByteBuffer putFloat(int index, float value) {
117:                throw new ReadOnlyBufferException();
118:            }
119:
120:            @Override
121:            public ByteBuffer putInt(int value) {
122:                throw new ReadOnlyBufferException();
123:            }
124:
125:            @Override
126:            public ByteBuffer putInt(int index, int value) {
127:                throw new ReadOnlyBufferException();
128:            }
129:
130:            @Override
131:            public ByteBuffer putLong(int index, long value) {
132:                throw new ReadOnlyBufferException();
133:            }
134:
135:            @Override
136:            public ByteBuffer putLong(long value) {
137:                throw new ReadOnlyBufferException();
138:            }
139:
140:            @Override
141:            public ByteBuffer putShort(int index, short value) {
142:                throw new ReadOnlyBufferException();
143:            }
144:
145:            @Override
146:            public ByteBuffer putShort(short value) {
147:                throw new ReadOnlyBufferException();
148:            }
149:
150:            @Override
151:            public ByteBuffer put(ByteBuffer buf) {
152:                throw new ReadOnlyBufferException();
153:            }
154:
155:            @Override
156:            public ByteBuffer slice() {
157:                ReadOnlyHeapByteBuffer slice = new ReadOnlyHeapByteBuffer(
158:                        backingArray, remaining(), offset + position);
159:                slice.order = order;
160:                return slice;
161:            }
162:        }
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