| /* |
| * 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.marshal; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Iterator; |
| |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.cql3.Term; |
| import org.apache.cassandra.db.DecoratedKey; |
| import org.apache.cassandra.db.PartitionPosition; |
| import org.apache.cassandra.serializers.TypeSerializer; |
| import org.apache.cassandra.serializers.MarshalException; |
| import org.apache.cassandra.dht.IPartitioner; |
| import org.apache.cassandra.transport.ProtocolVersion; |
| import org.apache.cassandra.utils.bytecomparable.ByteComparable; |
| import org.apache.cassandra.utils.bytecomparable.ByteComparable.Version; |
| import org.apache.cassandra.utils.bytecomparable.ByteSource; |
| import org.apache.cassandra.utils.FBUtilities; |
| |
| /** for sorting columns representing row keys in the row ordering as determined by a partitioner. |
| * Not intended for user-defined CFs, and will in fact error out if used with such. */ |
| public class PartitionerDefinedOrder extends AbstractType<ByteBuffer> |
| { |
| private final IPartitioner partitioner; |
| |
| public PartitionerDefinedOrder(IPartitioner partitioner) |
| { |
| super(ComparisonType.CUSTOM); |
| this.partitioner = partitioner; |
| } |
| |
| public static AbstractType<?> getInstance(TypeParser parser) |
| { |
| IPartitioner partitioner = DatabaseDescriptor.getPartitioner(); |
| Iterator<String> argIterator = parser.getKeyValueParameters().keySet().iterator(); |
| if (argIterator.hasNext()) |
| { |
| partitioner = FBUtilities.newPartitioner(argIterator.next()); |
| assert !argIterator.hasNext(); |
| } |
| return partitioner.partitionOrdering(); |
| } |
| |
| @Override |
| public <V> ByteBuffer compose(V value, ValueAccessor<V> accessor) |
| { |
| throw new UnsupportedOperationException("You can't do this with a local partitioner."); |
| } |
| |
| @Override |
| public ByteBuffer decompose(ByteBuffer value) |
| { |
| throw new UnsupportedOperationException("You can't do this with a local partitioner."); |
| } |
| |
| public <V> String getString(V value, ValueAccessor<V> accessor) |
| { |
| return accessor.toHex(value); |
| } |
| |
| public ByteBuffer fromString(String source) |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public Term fromJSONObject(Object parsed) |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public String toJSONString(ByteBuffer buffer, ProtocolVersion protocolVersion) |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public <VL, VR> int compareCustom(VL left, ValueAccessor<VL> accessorL, VR right, ValueAccessor<VR> accessorR) |
| { |
| // o1 and o2 can be empty so we need to use PartitionPosition, not DecoratedKey |
| return PartitionPosition.ForKey.get(accessorL.toBuffer(left), partitioner).compareTo(PartitionPosition.ForKey.get(accessorR.toBuffer(right), partitioner)); |
| } |
| |
| @Override |
| public <V> ByteSource asComparableBytes(ValueAccessor<V> accessor, V data, Version version) |
| { |
| // Partitioners work with ByteBuffers only. |
| ByteBuffer buf = ByteBufferAccessor.instance.convert(data, accessor); |
| if (version != Version.LEGACY) |
| { |
| // For ByteComparable.Version.OSS50 and above we encode an empty key with a null byte source. This |
| // way we avoid the need to special-handle a sentinel value when we decode the byte source for such a key |
| // (e.g. for ByteComparable.Version.Legacy we use the minimum key bound of the partitioner's minimum token as |
| // a sentinel value, and that results in the need to go twice through the byte source that is being |
| // decoded). |
| return buf.hasRemaining() ? partitioner.decorateKey(buf).asComparableBytes(version) : null; |
| } |
| return PartitionPosition.ForKey.get(buf, partitioner).asComparableBytes(version); |
| } |
| |
| @Override |
| public <V> V fromComparableBytes(ValueAccessor<V> accessor, ByteSource.Peekable comparableBytes, ByteComparable.Version version) |
| { |
| assert version != Version.LEGACY; |
| if (comparableBytes == null) |
| return accessor.empty(); |
| byte[] keyBytes = DecoratedKey.keyFromByteSource(comparableBytes, version, partitioner); |
| return accessor.valueOf(keyBytes); |
| } |
| |
| @Override |
| public void validate(ByteBuffer bytes) throws MarshalException |
| { |
| throw new IllegalStateException("You shouldn't be validating this."); |
| } |
| |
| public TypeSerializer<ByteBuffer> getSerializer() |
| { |
| throw new UnsupportedOperationException("You can't do this with a local partitioner."); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return String.format("%s(%s)", getClass().getName(), partitioner.getClass().getName()); |
| } |
| } |