/**
* 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.hadoop.fs.slive;
import java.text.DecimalFormat;
import java.text.NumberFormat;
/**
* Simple class that holds the number formatters used in the slive application
*/
class Formatter {
private static final String NUMBER_FORMAT = "###.###";
private static NumberFormat decFormatter = null;
private static NumberFormat percFormatter = null;
/**
* No construction allowed - only simple static accessor functions
*/
private Formatter() {
}
/**
* Gets a decimal formatter that has 3 decimal point precision
*
* @return NumberFormat formatter
*/
static synchronized NumberFormat getDecimalFormatter() {
if (decFormatter == null) {
decFormatter = new DecimalFormat(NUMBER_FORMAT);
}
return decFormatter;
}
/**
* Gets a percent formatter that has 3 decimal point precision
*
* @return NumberFormat formatter
*/
static synchronized NumberFormat getPercentFormatter() {
if (percFormatter == null) {
percFormatter = NumberFormat.getPercentInstance();
percFormatter.setMaximumFractionDigits(3);
}
return percFormatter;
}
}