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- /* ====================================================================
- 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;
- }
- }
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