/*
*
* 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.net.InetAddress;
import java.nio.ByteBuffer;
import org.apache.cassandra.db.*;
import org.apache.cassandra.utils.ByteBufferUtil;
public class CounterColumnType extends AbstractCommutativeType
{
public static final CounterColumnType instance = new CounterColumnType();
CounterColumnType() {} // singleton
public int compare(ByteBuffer o1, ByteBuffer o2)
{
if (o1 == null)
return null == o2 ? 0 : -1;
return ByteBufferUtil.compareUnsigned(o1, o2);
}
public String getString(ByteBuffer bytes)
{
return ByteBufferUtil.bytesToHex(bytes);
}
public String toString(Long l)
{
return l.toString();
}
/**
* create commutative column
*/
public Column createColumn(ByteBuffer name, ByteBuffer value, long timestamp)
{
return new CounterUpdateColumn(name, value, timestamp);
}
public ByteBuffer fromString(String source)
{
return ByteBufferUtil.hexToBytes(source);
}
public void validate(ByteBuffer bytes) throws MarshalException
{
if (bytes.remaining() != 8 && bytes.remaining() != 0)
throw new MarshalException(String.format("Expected 8 or 0 byte long (%d)", bytes.remaining()));
}
}