org.apache.pulsar.testclient.utils.PaddingDecimalFormat 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.
*/
package org.apache.pulsar.testclient.utils;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.FieldPosition;
@SuppressWarnings("serial")
public class PaddingDecimalFormat extends DecimalFormat {
private int minimumLength;
/**
* Creates a PaddingDecimalFormat using the given pattern and minimum minimumLength and the symbols for the default
* locale.
*/
public PaddingDecimalFormat(String pattern, int minLength) {
super(pattern);
minimumLength = minLength;
}
/**
* Creates a PaddingDecimalFormat using the given pattern, symbols and minimum minimumLength.
*/
public PaddingDecimalFormat(String pattern, DecimalFormatSymbols symbols, int minLength) {
super(pattern, symbols);
minimumLength = minLength;
}
@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) {
StringBuilder pad = new StringBuilder(padLength);
for (int i = 0; i < padLength; i++) {
pad.append(' ');
}
toAppendTo.insert(initLength, pad);
}
return toAppendTo;
}
}
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