| /* |
| * 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.cassandra.db; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.cassandra.dht.IPartitioner; |
| import org.apache.cassandra.dht.Token; |
| import org.apache.cassandra.utils.bytecomparable.ByteComparable; |
| |
| public class BufferDecoratedKey extends DecoratedKey |
| { |
| private final ByteBuffer key; |
| |
| public BufferDecoratedKey(Token token, ByteBuffer key) |
| { |
| super(token); |
| assert key != null; |
| this.key = key; |
| } |
| |
| public ByteBuffer getKey() |
| { |
| return key; |
| } |
| |
| @Override |
| public int getKeyLength() |
| { |
| return key.remaining(); |
| } |
| |
| /** |
| * A factory method that translates the given byte-comparable representation to a {@link BufferDecoratedKey} |
| * instance. If the given byte comparable doesn't represent the encoding of a buffer decorated key, anything from a |
| * wide variety of throwables may be thrown (e.g. {@link AssertionError}, {@link IndexOutOfBoundsException}, |
| * {@link IllegalStateException}, etc.). |
| * |
| * @param byteComparable A byte-comparable representation (presumably of a {@link BufferDecoratedKey} instance). |
| * @param version The encoding version used for the given byte comparable. |
| * @param partitioner The partitioner of the encoded decorated key. Needed in order to correctly decode the token |
| * bytes of the key. |
| * @return A new {@link BufferDecoratedKey} instance, corresponding to the given byte-comparable representation. If |
| * we were to call {@link #asComparableBytes(Version)} on the returned object, we should get a {@link ByteSource} |
| * equal to the one of the input byte comparable. |
| */ |
| public static BufferDecoratedKey fromByteComparable(ByteComparable byteComparable, |
| Version version, |
| IPartitioner partitioner) |
| { |
| return DecoratedKey.fromByteComparable(byteComparable, |
| version, |
| partitioner, |
| (token, keyBytes) -> new BufferDecoratedKey(token, ByteBuffer.wrap(keyBytes))); |
| } |
| } |