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.text.ParseException;
import java.util.UUID;
import java.util.regex.Pattern;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.cassandra.utils.FBUtilities;
import org.apache.cassandra.utils.UUIDGen;
import org.apache.commons.lang.time.DateUtils;
public class TimeUUIDType extends AbstractUUIDType
{
public static final TimeUUIDType instance = new TimeUUIDType();
static final Pattern regexPattern = Pattern.compile("[A-Fa-f0-9]{8}\\-[A-Fa-f0-9]{4}\\-[A-Fa-f0-9]{4}\\-[A-Fa-f0-9]{4}\\-[A-Fa-f0-9]{12}");
static final String[] iso8601Patterns = new String[] {
"yyyy-MM-dd HH:mm",
"yyyy-MM-dd HH:mm:ss",
"yyyy-MM-dd HH:mmZ",
"yyyy-MM-dd HH:mm:ssZ",
"yyyy-MM-dd'T'HH:mm",
"yyyy-MM-dd'T'HH:mmZ",
"yyyy-MM-dd'T'HH:mm:ss",
"yyyy-MM-dd'T'HH:mm:ssZ",
"yyyy-MM-dd",
"yyyy-MM-ddZ"
};
TimeUUIDType() {} // singleton
public UUID compose(ByteBuffer bytes)
{
return UUIDGen.getUUID(bytes);
}
public ByteBuffer decompose(UUID value)
{
return ByteBuffer.wrap(UUIDGen.decompose(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 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();
int o2Pos = o2.position();
int d = (o1.get(o1Pos+6) & 0xF) - (o2.get(o2Pos+6) & 0xF);
if (d != 0) return d;
d = (o1.get(o1Pos+7) & 0xFF) - (o2.get(o2Pos+7) & 0xFF);
if (d != 0) return d;
d = (o1.get(o1Pos+4) & 0xFF) - (o2.get(o2Pos+4) & 0xFF);
if (d != 0) return d;
d = (o1.get(o1Pos+5) & 0xFF) - (o2.get(o2Pos+5) & 0xFF);
if (d != 0) return d;
d = (o1.get(o1Pos) & 0xFF) - (o2.get(o2Pos) & 0xFF);
if (d != 0) return d;
d = (o1.get(o1Pos+1) & 0xFF) - (o2.get(o2Pos+1) & 0xFF);
if (d != 0) return d;
d = (o1.get(o1Pos+2) & 0xFF) - (o2.get(o2Pos+2) & 0xFF);
if (d != 0) return d;
return (o1.get(o1Pos+3) & 0xFF) - (o2.get(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 String toString(UUID uuid)
{
return uuid.toString();
}
public ByteBuffer fromString(String source) throws MarshalException
{
// Return an empty ByteBuffer for an empty string.
if (source.isEmpty())
return ByteBufferUtil.EMPTY_BYTE_BUFFER;
ByteBuffer idBytes = null;
// ffffffff-ffff-ffff-ffff-ffffffffff
if (regexPattern.matcher(source).matches())
{
UUID uuid = null;
try
{
uuid = UUID.fromString(source);
idBytes = decompose(uuid);
}
catch (IllegalArgumentException e)
{
throw new MarshalException(String.format("unable to make UUID from '%s'", source), e);
}
if (uuid.version() != 1)
throw new MarshalException("TimeUUID supports only version 1 UUIDs");
}
else if (source.toLowerCase().equals("now"))
{
idBytes = ByteBuffer.wrap(UUIDGen.decompose(UUIDGen.makeType1UUIDFromHost(FBUtilities.getLocalAddress())));
}
// Milliseconds since epoch?
else if (source.matches("^\\d+$"))
{
try
{
idBytes = ByteBuffer.wrap(UUIDGen.getTimeUUIDBytes(Long.parseLong(source)));
}
catch (NumberFormatException e)
{
throw new MarshalException(String.format("unable to make version 1 UUID from '%s'", source), e);
}
}
// Last chance, attempt to parse as date-time string
else
{
try
{
long timestamp = DateUtils.parseDate(source, iso8601Patterns).getTime();
idBytes = ByteBuffer.wrap(UUIDGen.getTimeUUIDBytes(timestamp));
}
catch (ParseException e1)
{
throw new MarshalException(String.format("unable to coerce '%s' to version 1 UUID", source), e1);
}
}
return idBytes;
}
public void validate(ByteBuffer bytes) throws MarshalException
{
if (bytes.remaining() != 16 && bytes.remaining() != 0)
throw new MarshalException(String.format("TimeUUID should be 16 or 0 bytes (%d)", bytes.remaining()));
ByteBuffer slice = bytes.slice();
// version is bits 4-7 of byte 6.
if (bytes.remaining() > 0)
{
slice.position(6);
if ((slice.get() & 0xf0) != 0x10)
throw new MarshalException("Invalid version for TimeUUID type.");
}
}
public Class<UUID> getType()
{
return UUID.class;
}
}