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'rapiddweller Common' is an open source Java library forked from Databene Commons by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * Licensed 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 com.rapiddweller.common.converter;

import com.rapiddweller.common.ConversionException;

import java.text.NumberFormat;
import java.util.Locale;

/**
 * Formats a number as a String.
 * Created: 10.09.2007 07:35:18
 *
 * @author Volker Bergmann
 */
public class Number2StringConverter extends ThreadSafeConverter {

  private final int minimumFractionDigits;
  private final int maximumFractionDigits;
  /**
   * The Grouping used.
   */
  boolean groupingUsed;

  /**
   * Instantiates a new Number 2 string converter.
   *
   * @param minimumFractionDigits the minimum fraction digits
   * @param maximumFractionDigits the maximum fraction digits
   * @param groupingUsed          the grouping used
   */
  public Number2StringConverter(int minimumFractionDigits, int maximumFractionDigits, boolean groupingUsed) {
    super(Number.class, String.class);
    this.minimumFractionDigits = minimumFractionDigits;
    this.maximumFractionDigits = maximumFractionDigits;
    this.groupingUsed = groupingUsed;
  }

  @Override
  public String convert(Number sourceValue) throws ConversionException {
    return convert(sourceValue, minimumFractionDigits, maximumFractionDigits, groupingUsed);
  }

  /**
   * Convert string.
   *
   * @param sourceValue           the source value
   * @param minimumFractionDigits the minimum fraction digits
   * @param maximumFractionDigits the maximum fraction digits
   * @param groupingUsed          the grouping used
   * @return the string
   */
  public static String convert(Number sourceValue, int minimumFractionDigits, int maximumFractionDigits, boolean groupingUsed) {
    NumberFormat format = NumberFormat.getInstance(Locale.US);
    format.setMinimumFractionDigits(minimumFractionDigits);
    format.setMaximumFractionDigits(maximumFractionDigits);
    format.setGroupingUsed(groupingUsed);
    return format.format(sourceValue);
  }

}