/**
* 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.
*/
package org.apache.hadoop.hbase.types;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.Order;
import org.apache.hadoop.hbase.util.PositionedByteRange;
/**
* An {@code DataType} for interacting with variable-length values
* encoded using {@link Bytes#putBytes(byte[], int, byte[], int, int)}.
* Intended to make it easier to transition away from direct use of
* {@link Bytes}.
* @see Bytes#putBytes(byte[], int, byte[], int, int)
* @see RawBytesTerminated
* @see RawBytesFixedLength
* @see OrderedBlob
* @see OrderedBlobVar
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class RawBytes implements DataType<byte[]> {
public static final RawBytes ASCENDING = new RawBytes(Order.ASCENDING);
public static final RawBytes DESCENDING = new RawBytes(Order.DESCENDING);
protected final Order order;
protected RawBytes() { this.order = Order.ASCENDING; }
protected RawBytes(Order order) { this.order = order; }
@Override
public boolean isOrderPreserving() { return true; }
@Override
public Order getOrder() { return order; }
@Override
public boolean isNullable() { return false; }
@Override
public boolean isSkippable() { return false; }
@Override
public int skip(PositionedByteRange src) {
int skipped = src.getRemaining();
src.setPosition(src.getLength());
return skipped;
}
@Override
public int encodedLength(byte[] val) { return val.length; }
@Override
public Class<byte[]> encodedClass() { return byte[].class; }
@Override
public byte[] decode(PositionedByteRange src) {
return decode(src, src.getRemaining());
}
@Override
public int encode(PositionedByteRange dst, byte[] val) {
return encode(dst, val, 0, val.length);
}
/**
* Read a {@code byte[]} from the buffer {@code src}.
*/
public byte[] decode(PositionedByteRange src, int length) {
byte[] val = new byte[length];
src.get(val);
return val;
}
/**
* Write {@code val} into {@code dst}, respecting {@code voff} and {@code vlen}.
* @return number of bytes written.
*/
public int encode(PositionedByteRange dst, byte[] val, int voff, int vlen) {
Bytes.putBytes(dst.getBytes(), dst.getOffset() + dst.getPosition(), val, voff, vlen);
dst.setPosition(dst.getPosition() + vlen);
return vlen;
}
}