| /* ==================================================================== |
| 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.extractor; |
| |
| import static org.apache.poi.hssf.model.InternalWorkbook.WORKBOOK_DIR_ENTRY_NAMES; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.poi.hssf.extractor.EventBasedExcelExtractor; |
| import org.apache.poi.hssf.extractor.ExcelExtractor; |
| import org.apache.poi.hssf.extractor.OldExcelExtractor; |
| import org.apache.poi.hssf.model.InternalWorkbook; |
| import org.apache.poi.hssf.record.crypto.Biff8EncryptionKey; |
| import org.apache.poi.poifs.filesystem.DirectoryNode; |
| import org.apache.poi.poifs.filesystem.FileMagic; |
| import org.apache.poi.poifs.filesystem.POIFSFileSystem; |
| |
| /** |
| * ExtractorFactory for HSSF and Old Excel format |
| */ |
| public class MainExtractorFactory implements ExtractorProvider { |
| @Override |
| public boolean accepts(FileMagic fm) { |
| return FileMagic.OLE2 == fm; |
| } |
| |
| @Override |
| public POITextExtractor create(File file, String password) throws IOException { |
| return create(new POIFSFileSystem(file, true).getRoot(), password); |
| } |
| |
| @Override |
| public POITextExtractor create(InputStream inputStream, String password) throws IOException { |
| return create(new POIFSFileSystem(inputStream).getRoot(), password); |
| } |
| |
| @Override |
| public POITextExtractor create(DirectoryNode poifsDir, String password) throws IOException { |
| final String oldPW = Biff8EncryptionKey.getCurrentUserPassword(); |
| try { |
| Biff8EncryptionKey.setCurrentUserPassword(password); |
| |
| // Look for certain entries in the stream, to figure it out from |
| for (String workbookName : WORKBOOK_DIR_ENTRY_NAMES) { |
| if (poifsDir.hasEntry(workbookName)) { |
| return ExtractorFactory.getPreferEventExtractor() ? new EventBasedExcelExtractor(poifsDir) : new ExcelExtractor(poifsDir); |
| } |
| } |
| |
| if (poifsDir.hasEntry(InternalWorkbook.OLD_WORKBOOK_DIR_ENTRY_NAME)) { |
| return new OldExcelExtractor(poifsDir); |
| } |
| } finally { |
| Biff8EncryptionKey.setCurrentUserPassword(oldPW); |
| } |
| |
| return null; |
| } |
| } |