/** * 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.dht; import java.nio.ByteBuffer; import java.util.Collections; import java.util.List; import java.util.Map; import org.apache.cassandra.db.DecoratedKey; import org.apache.cassandra.db.marshal.AbstractType; import org.apache.cassandra.utils.ByteBufferUtil; public class LocalPartitioner implements IPartitioner<LocalToken> { private final AbstractType comparator; public LocalPartitioner(AbstractType comparator) { this.comparator = comparator; } public DecoratedKey<LocalToken> convertFromDiskFormat(ByteBuffer key) { return decorateKey(key); } public DecoratedKey<LocalToken> decorateKey(ByteBuffer key) { return new DecoratedKey<LocalToken>(getToken(key), key); } public Token midpoint(Token left, Token right) { throw new UnsupportedOperationException(); } public LocalToken getMinimumToken() { return new LocalToken(comparator, ByteBufferUtil.EMPTY_BYTE_BUFFER); } public LocalToken getToken(ByteBuffer key) { return new LocalToken(comparator, key); } public LocalToken getRandomToken() { throw new UnsupportedOperationException(); } public Token.TokenFactory getTokenFactory() { throw new UnsupportedOperationException(); } public boolean preservesOrder() { return true; } public Map<Token, Float> describeOwnership(List<Token> sortedTokens) { return Collections.singletonMap((Token)getMinimumToken(), new Float(1.0)); } }