package org.apache.cassandra.db.marshal;
import java.nio.ByteBuffer;
import java.util.UUID;
import java.util.regex.Pattern;
import com.google.common.primitives.UnsignedLongs;
import org.apache.cassandra.cql3.CQL3Type;
import org.apache.cassandra.cql3.Constants;
import org.apache.cassandra.cql3.Term;
import org.apache.cassandra.serializers.TypeSerializer;
import org.apache.cassandra.serializers.MarshalException;
import org.apache.cassandra.serializers.UUIDSerializer;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.cassandra.utils.UUIDGen;
public class UUIDType extends AbstractType<UUID>
{
public static final UUIDType instance = new UUIDType();
UUIDType()
{
super(ComparisonType.CUSTOM);
}
public boolean isEmptyValueMeaningless()
{
return true;
}
public int compareCustom(ByteBuffer b1, ByteBuffer b2)
{
int s1 = b1.position(), s2 = b2.position();
int l1 = b1.limit(), l2 = b2.limit();
boolean p1 = l1 - s1 == 16, p2 = l2 - s2 == 16;
if (!(p1 & p2))
{
assert p1 | (l1 == s1);
assert p2 | (l2 == s2);
return p1 ? 1 : p2 ? -1 : 0;
}
long msb1 = b1.getLong(s1);
long msb2 = b2.getLong(s2);
int version1 = (int) ((msb1 >>> 12) & 0xf);
int version2 = (int) ((msb2 >>> 12) & 0xf);
if (version1 != version2)
return version1 - version2;
if (version1 == 1)
{
long reorder1 = TimeUUIDType.reorderTimestampBytes(msb1);
long reorder2 = TimeUUIDType.reorderTimestampBytes(msb2);
int c = Long.compare(reorder1, reorder2);
if (c != 0)
return c;
}
else
{
int c = UnsignedLongs.compare(msb1, msb2);
if (c != 0)
return c;
}
return UnsignedLongs.compare(b1.getLong(s1 + 8), b2.getLong(s2 + 8));
}
@Override
public boolean isValueCompatibleWithInternal(AbstractType<?> otherType)
{
return otherType instanceof UUIDType || otherType instanceof TimeUUIDType;
}
@Override
public ByteBuffer fromString(String source) throws MarshalException
{
ByteBuffer parsed = parse(source);
if (parsed != null)
return parsed;
throw new MarshalException(String.format("Unable to make UUID from '%s'", source));
}
@Override
public CQL3Type asCQL3Type()
{
return CQL3Type.Native.UUID;
}
public TypeSerializer<UUID> getSerializer()
{
return UUIDSerializer.instance;
}
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 ByteBuffer parse(String source)
{
if (source.isEmpty())
return ByteBufferUtil.EMPTY_BYTE_BUFFER;
if (regexPattern.matcher(source).matches())
{
try
{
return UUIDGen.toByteBuffer(UUID.fromString(source));
}
catch (IllegalArgumentException e)
{
throw new MarshalException(String.format("Unable to make UUID from '%s'", source), e);
}
}
return null;
}
@Override
public Term fromJSONObject(Object parsed) throws MarshalException
{
try
{
return new Constants.Value(fromString((String) parsed));
}
catch (ClassCastException exc)
{
throw new MarshalException(String.format(
"Expected a string representation of a uuid, but got a %s: %s", parsed.getClass().getSimpleName(), parsed));
}
}
static int version(ByteBuffer uuid)
{
return (uuid.get(6) & 0xf0) >> 4;
}
@Override
protected int valueLengthIfFixed()
{
return 16;
}
}