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

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/*
 *  Copyright (c) 2002,2003,2004,2005 Marc Prud'hommeaux
 *  All rights reserved.
 *
 *
 *  Redistribution and use in source and binary forms,
 *  with or without modification, are permitted provided
 *  that the following conditions are met:
 *
 *  Redistributions of source code must retain the above
 *  copyright notice, this list of conditions and the following
 *  disclaimer.
 *  Redistributions in binary form must reproduce the above
 *  copyright notice, this list of conditions and the following
 *  disclaimer in the documentation and/or other materials
 *  provided with the distribution.
 *  Neither the name of the  nor the names
 *  of its contributors may be used to endorse or promote
 *  products derived from this software without specific
 *  prior written permission.
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
 *  AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 *  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 *  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 *  OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 *  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 *  IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 *  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  This software is hosted by SourceForge.
 *  SourceForge is a trademark of VA Linux Systems, Inc.
 */

/*
 * This source file is based on code taken from SQLLine 1.0.2
 * The license above originally appeared in src/sqlline/SqlLine.java
 * http://sqlline.sourceforge.net/
 */
package org.apache.hive.beeline;

/**
 * OutputFormat for vertical column name: value format.
 *
 */
class VerticalOutputFormat implements OutputFormat {
  private final BeeLine beeLine;

  /**
   * @param beeLine
   */
  VerticalOutputFormat(BeeLine beeLine) {
    this.beeLine = beeLine;
  }

  public int print(Rows rows) {
    int count = 0;
    Rows.Row header = (Rows.Row) rows.next();
    while (rows.hasNext()) {
      printRow(rows, header, (Rows.Row) rows.next());
      count++;
    }
    return count;
  }

  public void printRow(Rows rows, Rows.Row header, Rows.Row row) {
    String[] head = header.values;
    String[] vals = row.values;
    int headwidth = 0;
    for (int i = 0; i < head.length && i < vals.length; i++) {
      headwidth = Math.max(headwidth, head[i].length());
    }

    headwidth += 2;

    for (int i = 0; i < head.length && i < vals.length; i++) {
      beeLine.output(beeLine.getColorBuffer().bold(
          beeLine.getColorBuffer().pad(head[i], headwidth).getMono())
          .append(vals[i] == null ? "" : vals[i]));
    }
    beeLine.output(""); // spacing
  }
}