/*
Copyright 2017 Alexandr Kurutin, BarD Software s.r.o
This file is part of GanttProject, an opensource project management tool.
GanttProject is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GanttProject is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GanttProject. If not, see <http://www.gnu.org/licenses/>.
*/
package biz.ganttproject.impex.csv;
import com.google.common.base.Preconditions;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import java.io.IOException;
import java.io.OutputStream;
/**
* @author akurutin on 04.04.2017.
*/
public class XlsWriterImpl implements SpreadsheetWriter {
private final Workbook myWorkbook;
private final Sheet mySheet;
private final OutputStream myStream;
private Row myCurrentRow = null;
private int myNextRowInd = 0;
private int myNextCellInd = 0;
XlsWriterImpl(OutputStream stream) {
myStream = Preconditions.checkNotNull(stream);
myWorkbook = new HSSFWorkbook();
mySheet = myWorkbook.createSheet();
}
@Override
public void print(String value) throws IOException {
if (myCurrentRow == null) {
createNewRow();
}
Cell cell = myCurrentRow.createCell(myNextCellInd++);
if (value != null) {
cell.setCellValue(value);
}
}
@Override
public void println() throws IOException {
createNewRow();
myNextCellInd = 0;
}
@Override
public void close() throws IOException {
myWorkbook.write(myStream);
myWorkbook.close();
myStream.close();
}
private void createNewRow() {
myCurrentRow = mySheet.createRow(myNextRowInd++);
}
}