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package com.google.refine.importers;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PushbackInputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.poi.POIXMLDocument;
import org.apache.poi.POIXMLException;
import org.apache.poi.common.usermodel.Hyperlink;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.json.JSONArray;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.refine.ProjectMetadata;
import com.google.refine.importing.ImportingJob;
import com.google.refine.importing.ImportingUtilities;
import com.google.refine.model.Cell;
import com.google.refine.model.Project;
import com.google.refine.model.Recon;
import com.google.refine.model.Recon.Judgment;
import com.google.refine.model.ReconCandidate;
import com.google.refine.util.JSONUtilities;
public class ExcelImporter extends TabularImportingParserBase {
static final Logger logger = LoggerFactory.getLogger(ExcelImporter.class);
public ExcelImporter() {
super(true);
}
@Override
public JSONObject createParserUIInitializationData(
ImportingJob job, List<JSONObject> fileRecords, String format) {
JSONObject options = super.createParserUIInitializationData(job, fileRecords, format);
JSONArray sheetRecords = new JSONArray();
JSONUtilities.safePut(options, "sheetRecords", sheetRecords);
try {
if (fileRecords.size() > 0) {
JSONObject firstFileRecord = fileRecords.get(0);
File file = ImportingUtilities.getFile(job, firstFileRecord);
InputStream is = new FileInputStream(file);
if (!is.markSupported()) {
is = new PushbackInputStream(is, 8);
}
try {
Workbook wb = POIXMLDocument.hasOOXMLHeader(is) ?
new XSSFWorkbook(is) :
new HSSFWorkbook(new POIFSFileSystem(is));
int sheetCount = wb.getNumberOfSheets();
boolean hasData = false;
for (int i = 0; i < sheetCount; i++) {
Sheet sheet = wb.getSheetAt(i);
int rows = sheet.getLastRowNum() - sheet.getFirstRowNum() + 1;
JSONObject sheetRecord = new JSONObject();
JSONUtilities.safePut(sheetRecord, "name", sheet.getSheetName());
JSONUtilities.safePut(sheetRecord, "rows", rows);
if (hasData) {
JSONUtilities.safePut(sheetRecord, "selected", false);
} else if (rows > 1) {
JSONUtilities.safePut(sheetRecord, "selected", true);
hasData = true;
}
JSONUtilities.append(sheetRecords, sheetRecord);
}
} finally {
is.close();
}
}
} catch (IOException e) {
logger.error("Error generating parser UI initialization data for Excel file", e);
} catch (IllegalArgumentException e) {
logger.error("Error generating parser UI initialization data for Excel file (only Excel 97 & later supported)", e);
} catch (POIXMLException e) {
logger.error("Error generating parser UI initialization data for Excel file - invalid XML", e);
}
return options;
}
@Override
public void parseOneFile(
Project project,
ProjectMetadata metadata,
ImportingJob job,
String fileSource,
InputStream inputStream,
int limit,
JSONObject options,
List<Exception> exceptions
) {
Workbook wb = null;
if (!inputStream.markSupported()) {
inputStream = new PushbackInputStream(inputStream, 8);
}
try {
wb = POIXMLDocument.hasOOXMLHeader(inputStream) ?
new XSSFWorkbook(inputStream) :
new HSSFWorkbook(new POIFSFileSystem(inputStream));
} catch (IOException e) {
exceptions.add(new ImportException(
"Attempted to parse as an Excel file but failed. " +
"Try to use Excel to re-save the file as a different Excel version or as TSV and upload again.",
e
));
return;
} catch (ArrayIndexOutOfBoundsException e){
exceptions.add(new ImportException(
"Attempted to parse file as an Excel file but failed. " +
"This is probably caused by a corrupt excel file, or due to the file having previously been created or saved by a non-Microsoft application. " +
"Please try opening the file in Microsoft Excel and resaving it, then try re-uploading the file. " +
"See https://issues.apache.org/bugzilla/show_bug.cgi?id=48261 for further details",
e
));
return;
} catch (IllegalArgumentException e) {
exceptions.add(new ImportException(
"Attempted to parse as an Excel file but failed. " +
"Only Excel 97 and later formats are supported.",
e
));
return;
} catch (POIXMLException e) {
exceptions.add(new ImportException(
"Attempted to parse as an Excel file but failed. " +
"Invalid XML.",
e
));
return;
}
int[] sheets = JSONUtilities.getIntArray(options, "sheets");
for (int sheetIndex : sheets) {
final Sheet sheet = wb.getSheetAt(sheetIndex);
final int lastRow = sheet.getLastRowNum();
TableDataReader dataReader = new TableDataReader() {
int nextRow = 0;
Map<String, Recon> reconMap = new HashMap<String, Recon>();
@Override
public List<Object> getNextRowOfCells() throws IOException {
if (nextRow > lastRow) {
return null;
}
List<Object> cells = new ArrayList<Object>();
org.apache.poi.ss.usermodel.Row row = sheet.getRow(nextRow++);
if (row != null) {
short lastCell = row.getLastCellNum();
for (short cellIndex = 0; cellIndex < lastCell; cellIndex++) {
Cell cell = null;
org.apache.poi.ss.usermodel.Cell sourceCell = row.getCell(cellIndex);
if (sourceCell != null) {
cell = extractCell(sourceCell, reconMap);
}
cells.add(cell);
}
}
return cells;
}
};
TabularImportingParserBase.readTable(
project,
metadata,
job,
dataReader,
fileSource + "#" + sheet.getSheetName(),
limit,
options,
exceptions
);
}
}
static protected Serializable extractCell(org.apache.poi.ss.usermodel.Cell cell) {
int cellType = cell.getCellType();
if (cellType == org.apache.poi.ss.usermodel.Cell.CELL_TYPE_FORMULA) {
cellType = cell.getCachedFormulaResultType();
}
if (cellType == org.apache.poi.ss.usermodel.Cell.CELL_TYPE_ERROR ||
cellType == org.apache.poi.ss.usermodel.Cell.CELL_TYPE_BLANK) {
return null;
}
Serializable value = null;
if (cellType == org.apache.poi.ss.usermodel.Cell.CELL_TYPE_BOOLEAN) {
value = cell.getBooleanCellValue();
} else if (cellType == org.apache.poi.ss.usermodel.Cell.CELL_TYPE_NUMERIC) {
double d = cell.getNumericCellValue();
if (HSSFDateUtil.isCellDateFormatted(cell)) {
value = HSSFDateUtil.getJavaDate(d);
// TODO: If we had a time datatype, we could use something like the following
// to distinguish times from dates (although Excel doesn't really make the distinction)
// Another alternative would be to look for values < 0.60
// String format = cell.getCellStyle().getDataFormatString();
// if (!format.contains("d") && !format.contains("m") && !format.contains("y") ) {
// // It's just a time
// }
} else {
value = d;
}
} else {
String text = cell.getStringCellValue();
if (text.length() > 0) {
value = text;
}
}
return value;
}
static protected Cell extractCell(org.apache.poi.ss.usermodel.Cell cell, Map<String, Recon> reconMap) {
Serializable value = extractCell(cell);
if (value != null) {
Recon recon = null;
Hyperlink hyperlink = cell.getHyperlink();
if (hyperlink != null) {
String url = hyperlink.getAddress();
if (url != null && (url.startsWith("http://") ||
url.startsWith("https://"))) {
final String sig = "freebase.com/view";
int i = url.indexOf(sig);
if (i > 0) {
String id = url.substring(i + sig.length());
int q = id.indexOf('?');
if (q > 0) {
id = id.substring(0, q);
}
int h = id.indexOf('#');
if (h > 0) {
id = id.substring(0, h);
}
if (reconMap.containsKey(id)) {
recon = reconMap.get(id);
recon.judgmentBatchSize++;
} else {
recon = new Recon(0, null, null);
recon.service = "import";
recon.match = new ReconCandidate(id, value.toString(), new String[0], 100);
recon.matchRank = 0;
recon.judgment = Judgment.Matched;
recon.judgmentAction = "auto";
recon.judgmentBatchSize = 1;
recon.addCandidate(recon.match);
reconMap.put(id, recon);
}
}
}
}
return new Cell(value, recon);
} else {
return null;
}
}
}