org.apache.hive.beeline.AbstractOutputFormat Maven / Gradle / Ivy

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/**
 * 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.
 */

/*
 * This source file is based on code taken from SQLLine 1.0.2
 * See SQLLine notice in LICENSE
 */
package org.apache.hive.beeline;

/**
 * Abstract OutputFormat.
 *
 */
abstract class AbstractOutputFormat implements OutputFormat {

  public int print(Rows rows) {
    int count = 0;
    Rows.Row header = (Rows.Row) rows.next();
    printHeader(header);

    while (rows.hasNext()) {
      printRow(rows, header, (Rows.Row) rows.next());
      count++;
    }
    printFooter(header);
    return count;
  }


  abstract void printHeader(Rows.Row header);

  abstract void printFooter(Rows.Row header);

  abstract void printRow(Rows rows, Rows.Row header, Rows.Row row);
}