content: /*
   * 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.activemq.artemis.cli.commands.messages.perf;
  
  import java.text.DecimalFormat;
  import java.text.DecimalFormatSymbols;
  import java.text.FieldPosition;
  
  public class PaddingDecimalFormat extends DecimalFormat {
  
     private int minimumLength;
     private final StringBuilder pad;
  
     /**
      * Creates a PaddingDecimalFormat using the given pattern and minimum {@code minLength} and the symbols for the
      * default locale.
      */
     public PaddingDecimalFormat(String pattern, int minLength) {
        super(pattern);
        minimumLength = minLength;
        pad = new StringBuilder();
     }
  
     /**
      * Creates a PaddingDecimalFormat using the given pattern, symbols and minimum minimumLength.
      */
     public PaddingDecimalFormat(String pattern, DecimalFormatSymbols symbols, int minLength) {
        super(pattern, symbols);
        minimumLength = minLength;
        pad = new StringBuilder();
     }
  
     @Override
     public StringBuffer format(double number, StringBuffer toAppendTo, FieldPosition pos) {
        int initLength = toAppendTo.length();
        super.format(number, toAppendTo, pos);
        return pad(toAppendTo, initLength);
     }
  
     @Override
     public StringBuffer format(long number, StringBuffer toAppendTo, FieldPosition pos) {
        int initLength = toAppendTo.length();
        super.format(number, toAppendTo, pos);
        return pad(toAppendTo, initLength);
     }
  
     private StringBuffer pad(StringBuffer toAppendTo, int initLength) {
        int numLength = toAppendTo.length() - initLength;
        int padLength = minimumLength - numLength;
        if (padLength > 0) {
           final int initialPadLength = pad.length();
           for (int i = initialPadLength; i < padLength; i++) {
              pad.append(' ');
           }
           pad.setLength(padLength);
           toAppendTo.insert(initLength, pad);
        }
        return toAppendTo;
     }
  }
  