/**
 * 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.mapreduce;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.Job;

/** The InputFormat to use to read data from HCatalog. */
public class HCatInputFormat extends HCatBaseInputFormat {

    /**
     * @see org.apache.hcatalog.mapreduce.HCatInputFormat#setInput(org.apache.hadoop.conf.Configuration, InputJobInfo)
     */
    public static void setInput(Job job,
                                InputJobInfo inputJobInfo) throws IOException {
        setInput(job.getConfiguration(), inputJobInfo);
    }

    /**
     * Set the input information to use for the job. This queries the metadata server
     * with the specified partition predicates, gets the matching partitions, and
     * puts the information in the conf object. The inputInfo object is updated
     * with information needed in the client context.
     * @param conf the job Configuration object
     * @param inputJobInfo the input information about the table to read
     * @throws IOException the exception in communicating with the metadata server
     */
    public static void setInput(Configuration conf,
                                InputJobInfo inputJobInfo) throws IOException {
        try {
            InitializeInput.setInput(conf, inputJobInfo);
        } catch (Exception e) {
            throw new IOException(e);
        }
    }


}