/*
 * 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.serializers.TypeSerializer;
import org.apache.cassandra.serializers.BooleanSerializer;
import org.apache.cassandra.serializers.MarshalException;

public class BooleanType extends AbstractType<Boolean>
{
    public static final BooleanType instance = new BooleanType();

    BooleanType() {} // singleton

    public int compare(ByteBuffer o1, ByteBuffer o2)
    {
        if ((o1 == null) || (o1.remaining() != 1))
            return ((o2 == null) || (o2.remaining() != 1)) ? 0 : -1;
        if ((o2 == null) || (o2.remaining() != 1))
            return 1;

        return o1.compareTo(o2);
    }

    public ByteBuffer fromString(String source) throws MarshalException
    {

        if (source.isEmpty()|| source.equalsIgnoreCase(Boolean.FALSE.toString()))
            return decompose(false);

        if (source.equalsIgnoreCase(Boolean.TRUE.toString()))
            return decompose(true);

        throw new MarshalException(String.format("unable to make boolean from '%s'", source));
    }

    public CQL3Type asCQL3Type()
    {
        return CQL3Type.Native.BOOLEAN;
    }

    public TypeSerializer<Boolean> getSerializer()
    {
        return BooleanSerializer.instance;
    }
}