| /* ==================================================================== |
| 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.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<String, ExcelAntWorkbookUtil> 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; |
| } |
| } |