org.apache.poi.ss.excelant.util.ExcelAntWorkbookUtilFactory Maven / Gradle / Ivy
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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
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package org.apache.poi.ss.excelant.util;
import java.util.HashMap;
import java.util.Map;
/**
* This is a factory class maps file names to WorkbookUtil instances. This
* helps ExcelAnt be more efficient when being run many times in an Ant build.
*
* @author Jon Svede (jon [at] loquatic [dot] com)
* @author Brian Bush (brian [dot] bush [at] nrel [dot] gov)
*
*/
public final class ExcelAntWorkbookUtilFactory {
private static Map workbookUtilMap;
private ExcelAntWorkbookUtilFactory() {
}
/**
* Using the fileName, check the internal map to see if an instance
* of the WorkbookUtil exists. If not, then add an instance to the map.
*
* @param fileName The filename to use as key to look for the ExcelAntWorkbookUtil.
* @return An instance of ExcelAntWorkbookUtil associated with the filename or
* a freshly instantiated one if none did exist before.
*/
public static ExcelAntWorkbookUtil getInstance(String fileName) {
if(workbookUtilMap == null) {
workbookUtilMap = new HashMap<>();
}
if(workbookUtilMap.containsKey(fileName)) {
return workbookUtilMap.get(fileName);
}
ExcelAntWorkbookUtil wbu = new ExcelAntWorkbookUtil(fileName);
workbookUtilMap.put(fileName, wbu);
return wbu;
}
}