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 java.util.UUID;
import org.apache.cassandra.utils.UUIDGen;
import org.safehaus.uuid.UUIDGenerator;
public class TimeUUIDType extends AbstractType
{
public static final TimeUUIDType instance = new TimeUUIDType();
TimeUUIDType() {} // singleton
public int compare(ByteBuffer o1, ByteBuffer o2)
{
if (o1.remaining() == 0)
{
return o2.remaining() == 0 ? 0 : -1;
}
if (o2.remaining() == 0)
{
return 1;
}
int res = compareTimestampBytes(o1, o2);
if (res != 0)
return res;
return o1.compareTo(o2);
}
private static int compareTimestampBytes(ByteBuffer o1, ByteBuffer o2)
{
int o1Pos = o1.position()+o1.arrayOffset();
int o2Pos = o2.position()+o2.arrayOffset();
int d = (o1.array()[o1Pos+6] & 0xF) - (o2.array()[o2Pos+6] & 0xF);
if (d != 0) return d;
d = (o1.array()[o1Pos+7] & 0xFF) - (o2.array()[o2Pos+7] & 0xFF);
if (d != 0) return d;
d = (o1.array()[o1Pos+4] & 0xFF) - (o2.array()[o2Pos+4] & 0xFF);
if (d != 0) return d;
d = (o1.array()[o1Pos+5] & 0xFF) - (o2.array()[o2Pos+5] & 0xFF);
if (d != 0) return d;
d = (o1.array()[o1Pos+0] & 0xFF) - (o2.array()[o2Pos+0] & 0xFF);
if (d != 0) return d;
d = (o1.array()[o1Pos+1] & 0xFF) - (o2.array()[o2Pos+1] & 0xFF);
if (d != 0) return d;
d = (o1.array()[o1Pos+2] & 0xFF) - (o2.array()[o2Pos+2] & 0xFF);
if (d != 0) return d;
return (o1.array()[o1Pos+3] & 0xFF) - (o2.array()[o2Pos+3] & 0xFF);
}
public String getString(ByteBuffer bytes)
{
if (bytes.remaining() == 0)
{
return "";
}
if (bytes.remaining() != 16)
{
throw new MarshalException("UUIDs must be exactly 16 bytes");
}
UUID uuid = UUIDGen.getUUID(bytes);
if (uuid.version() != 1)
{
throw new MarshalException("TimeUUID only makes sense with version 1 UUIDs");
}
return uuid.toString();
}
public ByteBuffer fromString(String source)
{
UUID uuid = UUID.fromString(source);
if (uuid.version() != 1)
throw new IllegalArgumentException("TimeUUID supports only version 1 UUIDs");
return ByteBuffer.wrap(UUIDGen.decompose(uuid));
}
}