| /* |
| * 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 org.apache.cassandra.cql3.CQL3Type; |
| import org.apache.cassandra.cql3.Term; |
| import org.apache.cassandra.db.context.CounterContext; |
| import org.apache.cassandra.serializers.CounterSerializer; |
| import org.apache.cassandra.serializers.MarshalException; |
| import org.apache.cassandra.transport.ProtocolVersion; |
| import org.apache.cassandra.serializers.TypeSerializer; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| public class CounterColumnType extends NumberType<Long> |
| { |
| public static final CounterColumnType instance = new CounterColumnType(); |
| |
| CounterColumnType() {super(ComparisonType.NOT_COMPARABLE);} // singleton |
| |
| public boolean isEmptyValueMeaningless() |
| { |
| return true; |
| } |
| |
| public boolean isCounter() |
| { |
| return true; |
| } |
| |
| public <V> Long compose(V value, ValueAccessor<V> accessor) |
| { |
| return CounterContext.instance().total(value, accessor); |
| } |
| |
| @Override |
| public ByteBuffer decompose(Long value) |
| { |
| return ByteBufferUtil.bytes(value); |
| } |
| |
| @Override |
| public <V> void validateCellValue(V cellValue, ValueAccessor<V> accessor) throws MarshalException |
| { |
| CounterContext.instance().validateContext(cellValue, accessor); |
| } |
| |
| public <V> String getString(V value, ValueAccessor<V> accessor) |
| { |
| return accessor.toHex(value); |
| } |
| |
| public ByteBuffer fromString(String source) |
| { |
| return ByteBufferUtil.hexToBytes(source); |
| } |
| |
| @Override |
| public Term fromJSONObject(Object parsed) |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public String toJSONString(ByteBuffer buffer, ProtocolVersion protocolVersion) |
| { |
| return CounterSerializer.instance.deserialize(buffer).toString(); |
| } |
| |
| public CQL3Type asCQL3Type() |
| { |
| return CQL3Type.Native.COUNTER; |
| } |
| |
| public TypeSerializer<Long> getSerializer() |
| { |
| return CounterSerializer.instance; |
| } |
| |
| @Override |
| protected long toLong(ByteBuffer value) |
| { |
| return ByteBufferUtil.toLong(value); |
| } |
| |
| public ByteBuffer add(NumberType<?> leftType, ByteBuffer left, NumberType<?> rightType, ByteBuffer right) |
| { |
| return ByteBufferUtil.bytes(leftType.toLong(left) + rightType.toLong(right)); |
| } |
| |
| public ByteBuffer substract(NumberType<?> leftType, ByteBuffer left, NumberType<?> rightType, ByteBuffer right) |
| { |
| return ByteBufferUtil.bytes(leftType.toLong(left) - rightType.toLong(right)); |
| } |
| |
| public ByteBuffer multiply(NumberType<?> leftType, ByteBuffer left, NumberType<?> rightType, ByteBuffer right) |
| { |
| return ByteBufferUtil.bytes(leftType.toLong(left) * rightType.toLong(right)); |
| } |
| |
| public ByteBuffer divide(NumberType<?> leftType, ByteBuffer left, NumberType<?> rightType, ByteBuffer right) |
| { |
| return ByteBufferUtil.bytes(leftType.toLong(left) / rightType.toLong(right)); |
| } |
| |
| public ByteBuffer mod(NumberType<?> leftType, ByteBuffer left, NumberType<?> rightType, ByteBuffer right) |
| { |
| return ByteBufferUtil.bytes(leftType.toLong(left) % rightType.toLong(right)); |
| } |
| |
| public ByteBuffer negate(ByteBuffer input) |
| { |
| return ByteBufferUtil.bytes(-toLong(input)); |
| } |
| } |