/*
 * 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.pig;

import java.io.IOException;
import java.util.Map;

import org.apache.pig.classification.InterfaceAudience;
import org.apache.pig.classification.InterfaceStability;
import org.apache.pig.data.DataBag;
import org.apache.pig.data.DataByteArray;
import org.apache.pig.data.Tuple;

/**
 * An interface that provides methods for converting Pig internal types to byte[].
 * It is intended to be used by StoreFunc implementations.
 * @since Pig 0.8
 */
@InterfaceAudience.Public
@InterfaceStability.Evolving // Because we still don't have the map casts quite right
public interface StoreCaster extends LoadCaster {
    public byte[] toBytes(DataBag bag) throws IOException;

    public byte[] toBytes(String s) throws IOException;

    public byte[] toBytes(Double d) throws IOException;

    public byte[] toBytes(Float f) throws IOException;

    public byte[] toBytes(Integer i) throws IOException;

    public byte[] toBytes(Long l) throws IOException;

    public byte[] toBytes(Map<String, Object> m) throws IOException;

    public byte[] toBytes(Tuple t) throws IOException;
    
    public byte[] toBytes(DataByteArray a) throws IOException;
}