package org.apache.cassandra.db.marshal;
/*
*
* 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.
*
*/
import java.nio.ByteBuffer;
import org.apache.cassandra.utils.ByteBufferUtil;
public class LongType extends AbstractType<Long>
{
public static final LongType instance = new LongType();
LongType() {} // singleton
public Long compose(ByteBuffer bytes)
{
return ByteBufferUtil.toLong(bytes);
}
public ByteBuffer decompose(Long value)
{
return ByteBufferUtil.bytes(value);
}
public int compare(ByteBuffer o1, ByteBuffer o2)
{
if (o1.remaining() == 0)
{
return o2.remaining() == 0 ? 0 : -1;
}
if (o2.remaining() == 0)
{
return 1;
}
int diff = o1.get(o1.position()) - o2.get(o2.position());
if (diff != 0)
return diff;
return ByteBufferUtil.compareUnsigned(o1, o2);
}
public String getString(ByteBuffer bytes)
{
if (bytes.remaining() == 0)
{
return "";
}
if (bytes.remaining() != 8)
{
throw new MarshalException("A long is exactly 8 bytes: "+bytes.remaining());
}
return String.valueOf(bytes.getLong(bytes.position()));
}
public ByteBuffer fromString(String source)
{
long longType;
try
{
longType = Long.parseLong(source);
}
catch (Exception e)
{
throw new RuntimeException("'" + source + "' could not be translated into a LongType.");
}
return decompose(longType);
}
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()));
}
}