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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.xssf;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import org.apache.commons.io.output.UnsynchronizedByteArrayOutputStream;
import org.apache.poi.POIDataSamples;
import org.apache.poi.ss.ITestDataProvider;
import org.apache.poi.ss.SpreadsheetVersion;
import org.apache.poi.ss.usermodel.FormulaEvaluator;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.streaming.DeferredSXSSFSheet;
import org.apache.poi.xssf.streaming.DeferredSXSSFWorkbook;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFFormulaEvaluator;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public final class DeferredSXSSFITestDataProvider implements ITestDataProvider {
public static final DeferredSXSSFITestDataProvider instance = new DeferredSXSSFITestDataProvider();
// an instance of all DeferredSXSSFWorkbooks opened by this TestDataProvider,
// so that the temporary files created can be disposed up by cleanup()
private final Collection<DeferredSXSSFWorkbook> instances = new ArrayList<>();
private DeferredSXSSFITestDataProvider() {
// enforce singleton
}
@Override
public Workbook openSampleWorkbook(String sampleFileName) {
XSSFWorkbook xssfWorkbook = XSSFITestDataProvider.instance.openSampleWorkbook(sampleFileName);
DeferredSXSSFWorkbook swb = new DeferredSXSSFWorkbook(xssfWorkbook);
instances.add(swb);
return swb;
}
/**
* Returns an XSSFWorkbook since SXSSFWorkbook is write-only
*/
@Override
public XSSFWorkbook writeOutAndReadBack(Workbook wb) {
// wb is usually an SXSSFWorkbook, but must also work on an XSSFWorkbook
// since workbooks must be able to be written out and read back
// several times in succession
if(!(wb instanceof SXSSFWorkbook || wb instanceof XSSFWorkbook)) {
throw new IllegalArgumentException("Expected an instance of XSSFWorkbook");
}
try (UnsynchronizedByteArrayOutputStream baos = UnsynchronizedByteArrayOutputStream.builder().get()) {
wb.write(baos);
try (InputStream is = baos.toInputStream()) {
return new XSSFWorkbook(is);
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
/**
* Returns an XSSFWorkbook since SXSSFWorkbook is write-only
*/
public XSSFWorkbook inMemoryWriteOutAndReadBack(SXSSFWorkbook wb) {
try (UnsynchronizedByteArrayOutputStream baos = UnsynchronizedByteArrayOutputStream.builder().get()) {
wb.writeAvoidingTempFiles(baos);
try (InputStream is = baos.toInputStream()) {
return new XSSFWorkbook(is);
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
public DeferredSXSSFWorkbook createWorkbook() {
DeferredSXSSFWorkbook wb = new DeferredSXSSFWorkbook();
instances.add(wb);
return wb;
}
//************ SXSSF-specific methods ***************//
@Override
public DeferredSXSSFWorkbook createWorkbook(int rowAccessWindowSize) {
DeferredSXSSFWorkbook wb = new DeferredSXSSFWorkbook(rowAccessWindowSize);
instances.add(wb);
return wb;
}
@Override
public void trackAllColumnsForAutosizing(Sheet sheet) {
((DeferredSXSSFSheet)sheet).trackAllColumnsForAutoSizing();
}
//************ End SXSSF-specific methods ***************//
@Override
public FormulaEvaluator createFormulaEvaluator(Workbook wb) {
return new XSSFFormulaEvaluator(((DeferredSXSSFWorkbook) wb).getXSSFWorkbook());
}
@Override
public byte[] getTestDataFileContent(String fileName) {
return POIDataSamples.getSpreadSheetInstance().readFile(fileName);
}
@Override
public SpreadsheetVersion getSpreadsheetVersion() {
return SpreadsheetVersion.EXCEL2007;
}
@Override
public String getStandardFileNameExtension() {
return "xlsx";
}
public synchronized boolean cleanup() {
boolean ok = true;
for(final DeferredSXSSFWorkbook wb : instances) {
ok = ok && wb.dispose();
}
instances.clear();
return ok;
}
}
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