/**
* 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.tez.util;
public class FastNumberFormat {
public static final int MAX_COUNT = 19;
private final char[] digits = new char[MAX_COUNT];
private int minimumIntegerDigits;
public static FastNumberFormat getInstance() {
return new FastNumberFormat();
}
public void setMinimumIntegerDigits(int minimumIntegerDigits) {
this.minimumIntegerDigits = minimumIntegerDigits;
}
public StringBuilder format(long source, StringBuilder sb) {
int left = MAX_COUNT;
if (source < 0) {
sb.append('-');
source = - source;
}
while (source > 0) {
digits[--left] = (char)('0' + (source % 10));
source /= 10;
}
while (MAX_COUNT - left < minimumIntegerDigits) {
digits[--left] = '0';
}
sb.append(digits, left, MAX_COUNT - left);
return sb;
}
public String format(long source) {
return format(source, new StringBuilder()).toString();
}
}