| /* |
| * 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.Constants; |
| import org.apache.cassandra.cql3.Term; |
| import org.apache.cassandra.serializers.ByteSerializer; |
| import org.apache.cassandra.serializers.MarshalException; |
| import org.apache.cassandra.serializers.TypeSerializer; |
| import org.apache.cassandra.transport.ProtocolVersion; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| public class ByteType extends NumberType<Byte> |
| { |
| public static final ByteType instance = new ByteType(); |
| |
| ByteType() |
| { |
| super(ComparisonType.CUSTOM); |
| } // singleton |
| |
| public <VL, VR> int compareCustom(VL left, ValueAccessor<VL> accessorL, VR right, ValueAccessor<VR> accessorR) |
| { |
| return accessorL.getByte(left, 0) - accessorR.getByte(right, 0); |
| } |
| |
| public ByteBuffer fromString(String source) throws MarshalException |
| { |
| // Return an empty ByteBuffer for an empty string. |
| if (source.isEmpty()) |
| return ByteBufferUtil.EMPTY_BYTE_BUFFER; |
| |
| byte b; |
| |
| try |
| { |
| b = Byte.parseByte(source); |
| } |
| catch (Exception e) |
| { |
| throw new MarshalException(String.format("Unable to make byte from '%s'", source), e); |
| } |
| |
| return decompose(b); |
| } |
| |
| public Term fromJSONObject(Object parsed) throws MarshalException |
| { |
| if (parsed instanceof String || parsed instanceof Number) |
| return new Constants.Value(fromString(String.valueOf(parsed))); |
| |
| throw new MarshalException(String.format( |
| "Expected a byte value, but got a %s: %s", parsed.getClass().getSimpleName(), parsed)); |
| } |
| |
| @Override |
| public String toJSONString(ByteBuffer buffer, ProtocolVersion protocolVersion) |
| { |
| return getSerializer().deserialize(buffer).toString(); |
| } |
| |
| @Override |
| public CQL3Type asCQL3Type() |
| { |
| return CQL3Type.Native.TINYINT; |
| } |
| |
| @Override |
| public TypeSerializer<Byte> getSerializer() |
| { |
| return ByteSerializer.instance; |
| } |
| |
| @Override |
| public byte toByte(ByteBuffer value) |
| { |
| return ByteBufferUtil.toByte(value); |
| } |
| |
| @Override |
| public short toShort(ByteBuffer value) |
| { |
| return toByte(value); |
| } |
| |
| @Override |
| protected int toInt(ByteBuffer value) |
| { |
| return toByte(value); |
| } |
| |
| public ByteBuffer add(NumberType<?> leftType, ByteBuffer left, NumberType<?> rightType, ByteBuffer right) |
| { |
| return ByteBufferUtil.bytes((byte) (leftType.toByte(left) + rightType.toByte(right))); |
| } |
| |
| public ByteBuffer substract(NumberType<?> leftType, ByteBuffer left, NumberType<?> rightType, ByteBuffer right) |
| { |
| return ByteBufferUtil.bytes((byte) (leftType.toByte(left) - rightType.toByte(right))); |
| } |
| |
| public ByteBuffer multiply(NumberType<?> leftType, ByteBuffer left, NumberType<?> rightType, ByteBuffer right) |
| { |
| return ByteBufferUtil.bytes((byte) (leftType.toByte(left) * rightType.toByte(right))); |
| } |
| |
| public ByteBuffer divide(NumberType<?> leftType, ByteBuffer left, NumberType<?> rightType, ByteBuffer right) |
| { |
| return ByteBufferUtil.bytes((byte) (leftType.toByte(left) / rightType.toByte(right))); |
| } |
| |
| public ByteBuffer mod(NumberType<?> leftType, ByteBuffer left, NumberType<?> rightType, ByteBuffer right) |
| { |
| return ByteBufferUtil.bytes((byte) (leftType.toByte(left) % rightType.toByte(right))); |
| } |
| |
| public ByteBuffer negate(ByteBuffer input) |
| { |
| return ByteBufferUtil.bytes((byte) -toByte(input)); |
| } |
| } |