| /* |
| * 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 org.apache.bookkeeper.tools.perf.utils; |
| |
| import java.text.DecimalFormat; |
| import java.text.DecimalFormatSymbols; |
| import java.text.FieldPosition; |
| |
| /** |
| * A decimal format that adds padding zeros. |
| */ |
| 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) { |
| StringBuffer pad = new StringBuffer(padLength); |
| for (int i = 0; i < padLength; i++) { |
| pad.append(' '); |
| } |
| toAppendTo.insert(initLength, pad); |
| } |
| return toAppendTo; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof PaddingDecimalFormat)) { |
| return false; |
| } |
| |
| PaddingDecimalFormat other = (PaddingDecimalFormat) obj; |
| return minimumLength == other.minimumLength && super.equals(obj); |
| } |
| |
| @Override |
| public int hashCode() { |
| return 31 * super.hashCode() + minimumLength; |
| } |
| } |