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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.stress;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import java.io.IOException;
import org.apache.commons.io.output.UnsynchronizedByteArrayOutputStream;
import org.apache.poi.ss.extractor.EmbeddedData;
import org.apache.poi.ss.extractor.EmbeddedExtractor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Name;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.util.RecordFormatException;
import org.apache.poi.xssf.usermodel.XSSFChartSheet;
public abstract class SpreadsheetHandler extends AbstractFileHandler {
public void handleWorkbook(Workbook wb) throws IOException {
// try to access some of the content
readContent(wb);
// write out the file
writeToArray(wb);
// access some more content (we had cases where writing corrupts the data in memory)
readContent(wb);
// write once more
UnsynchronizedByteArrayOutputStream out = writeToArray(wb);
// read in the written file
Workbook read = WorkbookFactory.create(out.toInputStream());
assertNotNull(read);
readContent(read);
extractEmbedded(read);
modifyContent(read);
read.close();
}
private UnsynchronizedByteArrayOutputStream writeToArray(Workbook wb) throws IOException {
UnsynchronizedByteArrayOutputStream stream = UnsynchronizedByteArrayOutputStream.builder().get();
wb.write(stream);
return stream;
}
private void readContent(Workbook wb) {
for(int i = 0;i < wb.getNumberOfSheets();i++) {
Sheet sheet = wb.getSheetAt(i);
assertNotNull(wb.getSheet(sheet.getSheetName()));
sheet.groupColumn((short) 4, (short) 5);
sheet.setColumnGroupCollapsed(4, true);
sheet.setColumnGroupCollapsed(4, false);
// don't do this for very large sheets as it will take a long time
if(sheet.getPhysicalNumberOfRows() > 1000) {
continue;
}
for(Row row : sheet) {
for(Cell cell : row) {
assertNotNull(cell.toString());
}
}
}
for (Name name : wb.getAllNames()) {
// this sometimes caused exceptions
if(!name.isFunctionName()) {
name.getRefersToFormula();
}
}
}
private void extractEmbedded(Workbook wb) throws IOException {
EmbeddedExtractor ee = new EmbeddedExtractor();
for (Sheet s : wb) {
for (EmbeddedData ed : ee.extractAll(s)) {
assertNotNull(ed.getFilename());
assertNotNull(ed.getEmbeddedData());
assertNotNull(ed.getShape());
}
}
}
private void modifyContent(Workbook wb) {
/* a number of file fail because of various things: udf, unimplemented functions, ...
we would need quite a list of excludes and the large regression tests would probably
take a lot longer to run...
try {
// try to re-compute all formulas to find cases where parsing fails
wb.getCreationHelper().createFormulaEvaluator().evaluateAll();
} catch (RuntimeException e) {
// only allow a specific exception which indicates that an external
// reference was not found
if(!e.getMessage().contains("Could not resolve external workbook name")) {
throw e;
}
}*/
for (int i=wb.getNumberOfSheets()-1; i>=0; i--) {
if(wb.getSheetAt(i) instanceof XSSFChartSheet) {
// clone for chart-sheets is not supported
continue;
}
try {
wb.cloneSheet(i);
} catch (RecordFormatException e) {
if (e.getCause() instanceof CloneNotSupportedException) {
// ignore me
continue;
}
throw e;
} catch (RuntimeException e) {
if ("Could not find 'internal references' EXTERNALBOOK".equals(e.getMessage()) ||
"CountryRecord not found".equals(e.getMessage()) ||
"CountryRecord or SSTRecord not found".equals(e.getMessage()) ||
"Cannot add more than 65535 shapes".equals(e.getMessage()) ) {
// ignore these here for now
continue;
}
throw e;
}
}
}
}
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