org.apache.cassandra.db.marshal.ByteType Maven / Gradle / Ivy
/*
* 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.nio.ByteBuffer;
import org.apache.cassandra.cql3.CQL3Type;
import org.apache.cassandra.cql3.Constants;
import org.apache.cassandra.cql3.Term;
import org.apache.cassandra.serializers.ByteSerializer;
import org.apache.cassandra.serializers.MarshalException;
import org.apache.cassandra.serializers.TypeSerializer;
import org.apache.cassandra.transport.ProtocolVersion;
import org.apache.cassandra.utils.ByteBufferUtil;
public class ByteType extends AbstractType
{
public static final ByteType instance = new ByteType();
ByteType()
{
super(ComparisonType.CUSTOM);
} // singleton
public int compareCustom(ByteBuffer o1, ByteBuffer o2)
{
return o1.get(o1.position()) - o2.get(o2.position());
}
public ByteBuffer fromString(String source) throws MarshalException
{
// Return an empty ByteBuffer for an empty string.
if (source.isEmpty())
return ByteBufferUtil.EMPTY_BYTE_BUFFER;
byte b;
try
{
b = Byte.parseByte(source);
}
catch (Exception e)
{
throw new MarshalException(String.format("Unable to make byte from '%s'", source), e);
}
return decompose(b);
}
public Term fromJSONObject(Object parsed) throws MarshalException
{
if (parsed instanceof String || parsed instanceof Number)
return new Constants.Value(fromString(String.valueOf(parsed)));
throw new MarshalException(String.format(
"Expected a byte value, but got a %s: %s", parsed.getClass().getSimpleName(), parsed));
}
@Override
public String toJSONString(ByteBuffer buffer, ProtocolVersion protocolVersion)
{
return getSerializer().deserialize(buffer).toString();
}
@Override
public CQL3Type asCQL3Type()
{
return CQL3Type.Native.TINYINT;
}
@Override
public TypeSerializer getSerializer()
{
return ByteSerializer.instance;
}
}