/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* The portion of this file denoted by 'Copied from com.google.protobuf.CodedOutputStream'
* is from Protocol Buffers v2.5.0 under the following license
*
* Copyright 2008 Google Inc. All rights reserved.
* http://code.google.com/p/protobuf/
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.apache.hadoop.hbase.util;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
/**
* A basic mutable {@link ByteRange} implementation.
*/
@InterfaceAudience.Public
public class SimpleMutableByteRange extends AbstractByteRange {
/**
* Create a new {@code ByteRange} lacking a backing array and with an
* undefined viewport.
*/
public SimpleMutableByteRange() {
unset();
}
/**
* Create a new {@code ByteRange} over a new backing array of size
* {@code capacity}. The range's offset and length are 0 and {@code capacity},
* respectively.
*
* @param capacity
* the size of the backing array.
*/
public SimpleMutableByteRange(int capacity) {
this(new byte[capacity]);
}
/**
* Create a new {@code ByteRange} over the provided {@code bytes}.
*
* @param bytes
* The array to wrap.
*/
public SimpleMutableByteRange(byte[] bytes) {
set(bytes);
}
/**
* Create a new {@code ByteRange} over the provided {@code bytes}.
*
* @param bytes
* The array to wrap.
* @param offset
* The offset into {@code bytes} considered the beginning of this
* range.
* @param length
* The length of this range.
*/
public SimpleMutableByteRange(byte[] bytes, int offset, int length) {
set(bytes, offset, length);
}
@Override
public ByteRange unset() {
clearHashCache();
bytes = null;
offset = 0;
length = 0;
return this;
}
@Override
public ByteRange put(int index, byte val) {
bytes[offset + index] = val;
clearHashCache();
return this;
}
@Override
public ByteRange put(int index, byte[] val) {
if (0 == val.length)
return this;
return put(index, val, 0, val.length);
}
@Override
public ByteRange put(int index, byte[] val, int offset, int length) {
if (0 == length)
return this;
System.arraycopy(val, offset, this.bytes, this.offset + index, length);
clearHashCache();
return this;
}
@Override
public ByteRange putShort(int index, short val) {
// This writing is same as BB's putShort. When byte[] is wrapped in a BB and
// call putShort(),
// one can get the same result.
bytes[offset + index + 1] = (byte) val;
val >>= 8;
bytes[offset + index] = (byte) val;
clearHashCache();
return this;
}
@Override
public ByteRange putInt(int index, int val) {
// This writing is same as BB's putInt. When byte[] is wrapped in a BB and
// call getInt(), one
// can get the same result.
for (int i = Bytes.SIZEOF_INT - 1; i > 0; i--) {
bytes[offset + index + i] = (byte) val;
val >>>= 8;
}
bytes[offset + index] = (byte) val;
clearHashCache();
return this;
}
@Override
public ByteRange putLong(int index, long val) {
// This writing is same as BB's putLong. When byte[] is wrapped in a BB and
// call putLong(), one
// can get the same result.
for (int i = Bytes.SIZEOF_LONG - 1; i > 0; i--) {
bytes[offset + index + i] = (byte) val;
val >>>= 8;
}
bytes[offset + index] = (byte) val;
clearHashCache();
return this;
}
// Copied from com.google.protobuf.CodedOutputStream v2.5.0 writeRawVarint64
@Override
public int putVLong(int index, long val) {
int rPos = 0;
while (true) {
if ((val & ~0x7F) == 0) {
bytes[offset + index + rPos] = (byte) val;
break;
} else {
bytes[offset + index + rPos] = (byte) ((val & 0x7F) | 0x80);
val >>>= 7;
}
rPos++;
}
clearHashCache();
return rPos + 1;
}
// end copied from protobuf
@Override
public ByteRange deepCopy() {
SimpleMutableByteRange clone = new SimpleMutableByteRange(deepCopyToNewArray());
if (isHashCached()) {
clone.hash = hash;
}
return clone;
}
@Override
public ByteRange shallowCopy() {
SimpleMutableByteRange clone = new SimpleMutableByteRange(bytes, offset, length);
if (isHashCached()) {
clone.hash = hash;
}
return clone;
}
@Override
public ByteRange shallowCopySubRange(int innerOffset, int copyLength) {
SimpleMutableByteRange clone = new SimpleMutableByteRange(bytes, offset + innerOffset,
copyLength);
if (isHashCached()) {
clone.hash = hash;
}
return clone;
}
@Override
public boolean equals(Object thatObject) {
if (thatObject == null) {
return false;
}
if (this == thatObject) {
return true;
}
if (hashCode() != thatObject.hashCode()) {
return false;
}
if (!(thatObject instanceof SimpleMutableByteRange)) {
return false;
}
SimpleMutableByteRange that = (SimpleMutableByteRange) thatObject;
return Bytes.equals(bytes, offset, length, that.bytes, that.offset, that.length);
}
}