/**
 * 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.hcatalog.data;

import java.util.List;

import org.apache.hadoop.io.Writable;

/**
 * Interface that determines whether we can implement a HCatRecord on top of it
 */
public interface HCatRecordable extends Writable {

    /**
     * Gets the field at the specified index.
     * @param fieldNum the field number
     * @return the object at the specified index
     */
    Object get(int fieldNum);

    /**
     * Gets all the fields of the hcat record.
     * @return the list of fields
     */
    List<Object> getAll();

    /**
     * Sets the field at the specified index.
     * @param fieldNum the field number
     * @param value the value to set
     */
    void set(int fieldNum, Object value);

    /**
     * Gets the size of the hcat record.
     * @return the size
     */
    int size();

}