package org.jabref.logic.exporter;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.URL;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Objects;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.jabref.model.database.BibDatabase;
import org.jabref.model.database.BibDatabaseContext;
import org.jabref.model.entry.BibEntry;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* @author alver
*/
public class OpenOfficeDocumentCreator extends ExportFormat {
private static final Log LOGGER = LogFactory.getLog(OpenOfficeDocumentCreator.class);
/**
* Creates a new instance of OpenOfficeDocumentCreator
*/
public OpenOfficeDocumentCreator() {
super("OpenOffice/LibreOffice Calc", "oocalc", null, null, ".sxc");
}
@Override
public void performExport(final BibDatabaseContext databaseContext, final String file,
final Charset encoding, List<BibEntry> entries) throws Exception {
Objects.requireNonNull(databaseContext);
Objects.requireNonNull(entries);
if (!entries.isEmpty()) { // Do not export if no entries
OpenOfficeDocumentCreator.exportOpenOfficeCalc(new File(file), databaseContext.getDatabase(), entries);
}
}
private static void storeOpenOfficeFile(File file, InputStream source) throws Exception {
try (ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(file)))) {
ZipEntry zipEntry = new ZipEntry("content.xml");
out.putNextEntry(zipEntry);
int c;
while ((c = source.read()) >= 0) {
out.write(c);
}
out.closeEntry();
// Add manifest (required for OOo 2.0), "meta.xml", "mimetype" files. These are in the
// resource/openoffice directory, and are copied verbatim into the zip file.
OpenOfficeDocumentCreator.addResourceFile("meta.xml", "/resource/openoffice/meta.xml", out);
OpenOfficeDocumentCreator.addResourceFile("mimetype", "/resource/openoffice/mimetype", out);
OpenOfficeDocumentCreator.addResourceFile("META-INF/manifest.xml", "/resource/openoffice/manifest.xml",
out);
}
}
private static void exportOpenOfficeCalc(File file, BibDatabase database, List<BibEntry> entries) throws Exception {
// First store the xml formatted content to a temporary file.
File tmpFile = File.createTempFile("oocalc", null);
OpenOfficeDocumentCreator.exportOpenOfficeCalcXML(tmpFile, database, entries);
// Then add the content to the zip file:
try (BufferedInputStream in = new BufferedInputStream(new FileInputStream(tmpFile))) {
OpenOfficeDocumentCreator.storeOpenOfficeFile(file, in);
}
// Delete the temporary file:
if (!tmpFile.delete()) {
LOGGER.info("Cannot delete temporary export file");
}
}
private static void exportOpenOfficeCalcXML(File tmpFile, BibDatabase database, List<BibEntry> entries) {
OOCalcDatabase od = new OOCalcDatabase(database, entries);
try (Writer ps = new OutputStreamWriter(new FileOutputStream(tmpFile), StandardCharsets.UTF_8)) {
DOMSource source = new DOMSource(od.getDOMrepresentation());
StreamResult result = new StreamResult(ps);
Transformer trans = TransformerFactory.newInstance().newTransformer();
trans.setOutputProperty(OutputKeys.INDENT, "yes");
trans.transform(source, result);
} catch (Exception e) {
throw new Error(e);
}
}
private static void addResourceFile(String name, String resource, ZipOutputStream out) throws IOException {
ZipEntry zipEntry = new ZipEntry(name);
out.putNextEntry(zipEntry);
OpenOfficeDocumentCreator.addFromResource(resource, out);
out.closeEntry();
}
private static void addFromResource(String resource, OutputStream out) {
URL url = OpenOfficeDocumentCreator.class.getResource(resource);
try (InputStream in = url.openStream()) {
byte[] buffer = new byte[256];
synchronized (out) {
while (true) {
int bytesRead = in.read(buffer);
if (bytesRead == -1) {
break;
}
out.write(buffer, 0, bytesRead);
}
}
} catch (IOException e) {
LOGGER.warn("Cannot get resource", e);
}
}
}