/*
* Copyright (c) 2006-2009 by Abacus Research AG, Switzerland.
* All rights reserved.
*
* This file is part of the Abacus Formula Compiler (AFC).
*
* For commercial licensing, please contact sales(at)formulacompiler.com.
*
* AFC 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.
*
* AFC 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 AFC. If not, see <http://www.gnu.org/licenses/>.
*/
package org.formulacompiler.spreadsheet.internal.odf.loader;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import javax.xml.stream.XMLStreamException;
import org.formulacompiler.runtime.ComputationMode;
import org.formulacompiler.spreadsheet.Spreadsheet;
import org.formulacompiler.spreadsheet.SpreadsheetException;
import org.formulacompiler.spreadsheet.SpreadsheetLoader;
import org.formulacompiler.spreadsheet.internal.loader.SpreadsheetLoaderDispatcher;
import org.formulacompiler.spreadsheet.internal.loader.builder.SpreadsheetBuilder;
import org.formulacompiler.spreadsheet.internal.odf.XMLConstants;
import org.formulacompiler.spreadsheet.internal.odf.loader.parser.SpreadsheetParser;
import org.formulacompiler.spreadsheet.internal.odf.xml.stream.Parser;
/**
* @author Vladimir Korenev
*/
public class OpenDocumentSpreadsheetLoader implements SpreadsheetLoader
{
public static final class Factory implements SpreadsheetLoaderDispatcher.Factory
{
public SpreadsheetLoader newInstance( Config _config )
{
return new OpenDocumentSpreadsheetLoader( _config );
}
public boolean canHandle( String _fileName )
{
return _fileName.toLowerCase().endsWith( ".ods" );
}
}
private final Config config;
private OpenDocumentSpreadsheetLoader( final Config _config )
{
this.config = _config;
}
public Spreadsheet loadFrom( final String _originalFileName, final InputStream _stream ) throws IOException,
SpreadsheetException
{
ZipInputStream zipInputStream = new ZipInputStream( _stream );
ZipEntry zipEntry;
while ((zipEntry = zipInputStream.getNextEntry()) != null) {
if ("content.xml".equals( zipEntry.getName() )) {
return readContent( _originalFileName, zipInputStream );
}
}
throw new SpreadsheetException.LoadError( "<content.xml> is missing in <" + _originalFileName + ">" );
}
private Spreadsheet readContent( String _fileName, InputStream _inputStream ) throws SpreadsheetException
{
final SpreadsheetBuilder spreadsheetBuilder = new SpreadsheetBuilder( ComputationMode.OPEN_OFFICE_CALC );
try {
final SpreadsheetParser spreadsheetParser = new SpreadsheetParser( spreadsheetBuilder, this.config );
final Parser parser = new Parser( Collections.singletonMap( XMLConstants.Office.SPREADSHEET, spreadsheetParser ) );
parser.parse( _inputStream );
}
catch (XMLStreamException e) {
final Throwable nestedException = e.getNestedException();
if (nestedException != null) {
e.initCause( nestedException );
}
throw new SpreadsheetException.LoadError( "Error loading " + _fileName, e );
}
return spreadsheetBuilder.getSpreadsheet();
}
}