/*
* 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.serializers.TypeSerializer;
import org.apache.cassandra.serializers.DoubleSerializer;
import org.apache.cassandra.serializers.MarshalException;
import org.apache.cassandra.utils.ByteBufferUtil;
public class DoubleType extends AbstractType<Double>
{
public static final DoubleType instance = new DoubleType();
DoubleType() {} // singleton
public int compare(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;
Double d;
try
{
d = Double.valueOf(source);
}
catch (NumberFormatException e1)
{
throw new MarshalException(String.format("unable to coerce '%s' to a double", source), e1);
}
return decompose(d);
}
public CQL3Type asCQL3Type()
{
return CQL3Type.Native.DOUBLE;
}
public TypeSerializer<Double> getSerializer()
{
return DoubleSerializer.instance;
}
}