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Common functionality for HBase
/*
* 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
//
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// 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
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// 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.yetus.audience.InterfaceAudience;
/**
* Extends the basic {@link AbstractPositionedByteRange} implementation with position support and it
* is a mutable version. {@code position} is considered transient, not fundamental to the definition
* of the range, and does not participate in {@link #compareTo(ByteRange)}, {@link #hashCode()}, or
* {@link #equals(Object)}. {@code Position} is retained by copy operations.
*/
@InterfaceAudience.Public
@edu.umd.cs.findbugs.annotations.SuppressWarnings("EQ_DOESNT_OVERRIDE_EQUALS")
public class SimplePositionedMutableByteRange extends AbstractPositionedByteRange {
/**
* Create a new {@code PositionedByteRange} lacking a backing array and with an undefined
* viewport.
*/
public SimplePositionedMutableByteRange() {
super();
}
/**
* Create a new {@code PositionedByteRange} over a new backing array of size {@code capacity}. The
* range's offset and length are 0 and {@code capacity}, respectively. n * the size of the backing
* array.
*/
public SimplePositionedMutableByteRange(int capacity) {
this(new byte[capacity]);
}
/**
* Create a new {@code PositionedByteRange} over the provided {@code bytes}. n * The array to
* wrap.
*/
public SimplePositionedMutableByteRange(byte[] bytes) {
set(bytes);
}
/**
* Create a new {@code PositionedByteRange} over the provided {@code bytes}. n * The array to
* wrap. n * The offset into {@code bytes} considered the beginning of this range. n * The length
* of this range.
*/
public SimplePositionedMutableByteRange(byte[] bytes, int offset, int length) {
set(bytes, offset, length);
}
@Override
public PositionedByteRange unset() {
this.position = 0;
clearHashCache();
bytes = null;
offset = 0;
length = 0;
return this;
}
@Override
public PositionedByteRange set(int capacity) {
this.position = 0;
super.set(capacity);
this.limit = capacity;
return this;
}
@Override
public PositionedByteRange set(byte[] bytes) {
this.position = 0;
super.set(bytes);
this.limit = bytes.length;
return this;
}
@Override
public PositionedByteRange set(byte[] bytes, int offset, int length) {
this.position = 0;
super.set(bytes, offset, length);
limit = length;
return this;
}
/**
* Update the beginning of this range. {@code offset + length} may not be greater than
* {@code bytes.length}. Resets {@code position} to 0. n * the new start of this range.
* @return this.
*/
@Override
public PositionedByteRange setOffset(int offset) {
this.position = 0;
super.setOffset(offset);
return this;
}
/**
* Update the length of this range. {@code offset + length} should not be greater than
* {@code bytes.length}. If {@code position} is greater than the new {@code length}, sets
* {@code position} to {@code length}. n * The new length of this range.
* @return this.
*/
@Override
public PositionedByteRange setLength(int length) {
this.position = Math.min(position, length);
super.setLength(length);
return this;
}
@Override
public PositionedByteRange put(byte val) {
put(position++, val);
return this;
}
@Override
public PositionedByteRange put(byte[] val) {
if (0 == val.length) return this;
return this.put(val, 0, val.length);
}
@Override
public PositionedByteRange put(byte[] val, int offset, int length) {
if (0 == length) return this;
put(position, val, offset, length);
this.position += length;
return this;
}
@Override
public PositionedByteRange get(int index, byte[] dst) {
super.get(index, dst);
return this;
}
@Override
public PositionedByteRange get(int index, byte[] dst, int offset, int length) {
super.get(index, dst, offset, length);
return this;
}
@Override
public PositionedByteRange put(int index, byte val) {
bytes[offset + index] = val;
return this;
}
@Override
public PositionedByteRange put(int index, byte[] val) {
if (0 == val.length) return this;
return put(index, val, 0, val.length);
}
@Override
public PositionedByteRange put(int index, byte[] val, int offset, int length) {
if (0 == length) return this;
System.arraycopy(val, offset, this.bytes, this.offset + index, length);
return this;
}
@Override
public PositionedByteRange deepCopy() {
SimplePositionedMutableByteRange clone =
new SimplePositionedMutableByteRange(deepCopyToNewArray());
clone.position = this.position;
return clone;
}
@Override
public PositionedByteRange shallowCopy() {
SimplePositionedMutableByteRange clone =
new SimplePositionedMutableByteRange(bytes, offset, length);
clone.position = this.position;
return clone;
}
@Override
public PositionedByteRange shallowCopySubRange(int innerOffset, int copyLength) {
SimplePositionedMutableByteRange clone =
new SimplePositionedMutableByteRange(bytes, offset + innerOffset, copyLength);
clone.position = this.position;
return clone;
}
@Override
public PositionedByteRange putShort(short val) {
putShort(position, val);
position += Bytes.SIZEOF_SHORT;
return this;
}
@Override
public PositionedByteRange putInt(int val) {
putInt(position, val);
position += Bytes.SIZEOF_INT;
return this;
}
@Override
public PositionedByteRange putLong(long val) {
putLong(position, val);
position += Bytes.SIZEOF_LONG;
return this;
}
@Override
public int putVLong(long val) {
int len = putVLong(position, val);
position += len;
return len;
}
@Override
public PositionedByteRange 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 PositionedByteRange 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 PositionedByteRange 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
}