home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Lucene example source code file (Format.java)

This example Lucene source code file (Format.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lucene tags/keywords

format, format, numberformat, numberformat, string, string, text

The Lucene Format.java source code

package org.apache.lucene.benchmark.byTask.utils;

/**
 * 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.
 */

import java.text.NumberFormat;

/**
 * Formatting utilities (for reports).
 */
public class Format {

  private static NumberFormat numFormat [] = { 
    NumberFormat.getInstance(), 
    NumberFormat.getInstance(),
    NumberFormat.getInstance(),
  };
  private static final String padd = "                                                 ";
  
  static {
    numFormat[0].setMaximumFractionDigits(0);
    numFormat[0].setMinimumFractionDigits(0);
    numFormat[1].setMaximumFractionDigits(1);
    numFormat[1].setMinimumFractionDigits(1);
    numFormat[2].setMaximumFractionDigits(2);
    numFormat[2].setMinimumFractionDigits(2);
  }

  /**
   * Padd a number from left.
   * @param numFracDigits number of digits in fraction part - must be 0 or 1 or 2.
   * @param f number to be formatted.
   * @param col column name (used for deciding on length).
   * @return formatted string.
   */
  public static String format(int numFracDigits, float f, String col) {
    String res = padd + numFormat[numFracDigits].format(f);
    return res.substring(res.length() - col.length());
  }

  public static String format(int numFracDigits, double f, String col) {
    String res = padd + numFormat[numFracDigits].format(f);
    return res.substring(res.length() - col.length());
  }

  /**
   * Pad a number from right.
   * @param numFracDigits number of digits in fraction part - must be 0 or 1 or 2.
   * @param f number to be formatted.
   * @param col column name (used for deciding on length).
   * @return formatted string.
   */
  public static String formatPaddRight(int numFracDigits, float f, String col) {
    String res = numFormat[numFracDigits].format(f) + padd;
    return res.substring(0, col.length());
  }

  public static String formatPaddRight(int numFracDigits, double f, String col) {
    String res = numFormat[numFracDigits].format(f) + padd;
    return res.substring(0, col.length());
  }

  /**
   * Pad a number from left.
   * @param n number to be formatted.
   * @param col column name (used for deciding on length).
   * @return formatted string.
   */
  public static String format(int n, String col) {
    String res = padd + n;
    return res.substring(res.length() - col.length());
  }

  /**
   * Pad a string from right.
   * @param s string to be formatted.
   * @param col column name (used for deciding on length).
   * @return formatted string.
   */
  public static String format(String s, String col) {
    String s1 = (s + padd);
    return s1.substring(0, Math.min(col.length(), s1.length()));
  }

  /**
   * Pad a string from left.
   * @param s string to be formatted.
   * @param col column name (used for deciding on length).
   * @return formatted string.
   */
  public static String formatPaddLeft(String s, String col) {
    String res = padd + s;
    return res.substring(res.length() - col.length());
  }

}

Other Lucene examples (source code examples)

Here is a short list of links related to this Lucene Format.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2019 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.