| /* |
| * 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.math.BigDecimal; |
| 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.TypeSerializer; |
| import org.apache.cassandra.serializers.DecimalSerializer; |
| import org.apache.cassandra.serializers.MarshalException; |
| import org.apache.cassandra.transport.ProtocolVersion; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| public class DecimalType extends AbstractType<BigDecimal> |
| { |
| public static final DecimalType instance = new DecimalType(); |
| |
| DecimalType() {super(ComparisonType.CUSTOM);} // singleton |
| |
| public boolean isEmptyValueMeaningless() |
| { |
| return true; |
| } |
| |
| public int compareCustom(ByteBuffer o1, ByteBuffer o2) |
| { |
| if (!o1.hasRemaining() || !o2.hasRemaining()) |
| return o1.hasRemaining() ? 1 : o2.hasRemaining() ? -1 : 0; |
| |
| return compose(o1).compareTo(compose(o2)); |
| } |
| |
| public ByteBuffer fromString(String source) throws MarshalException |
| { |
| // Return an empty ByteBuffer for an empty string. |
| if (source.isEmpty()) return ByteBufferUtil.EMPTY_BYTE_BUFFER; |
| |
| BigDecimal decimal; |
| |
| try |
| { |
| decimal = new BigDecimal(source); |
| } |
| catch (Exception e) |
| { |
| throw new MarshalException(String.format("unable to make BigDecimal from '%s'", source), e); |
| } |
| |
| return decompose(decimal); |
| } |
| |
| @Override |
| public Term fromJSONObject(Object parsed) throws MarshalException |
| { |
| try |
| { |
| return new Constants.Value(getSerializer().serialize(new BigDecimal(parsed.toString()))); |
| } |
| catch (NumberFormatException exc) |
| { |
| throw new MarshalException(String.format("Value '%s' is not a valid representation of a decimal value", parsed)); |
| } |
| } |
| |
| @Override |
| public String toJSONString(ByteBuffer buffer, ProtocolVersion protocolVersion) |
| { |
| return getSerializer().deserialize(buffer).toString(); |
| } |
| |
| public CQL3Type asCQL3Type() |
| { |
| return CQL3Type.Native.DECIMAL; |
| } |
| |
| public TypeSerializer<BigDecimal> getSerializer() |
| { |
| return DecimalSerializer.instance; |
| } |
| } |