/*
* Copyright 2009 Harvard University Library
*
* This file is part of FITS (File Information Tool Set).
*
* FITS is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* FITS 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FITS. If not, see <http://www.gnu.org/licenses/>.
*/
package edu.harvard.hul.ois.fits.tools.nlnz;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.StringReader;
import org.jdom.Document;
import org.jdom.JDOMException;
import nz.govt.natlib.AdapterFactory;
import nz.govt.natlib.adapter.DataAdapter;
import nz.govt.natlib.fx.ParserContext;
import nz.govt.natlib.fx.ParserListener;
import nz.govt.natlib.meta.config.Config;
import nz.govt.natlib.meta.harvester.DTDXmlParserListener;
import edu.harvard.hul.ois.fits.Fits;
import edu.harvard.hul.ois.fits.exceptions.FitsException;
import edu.harvard.hul.ois.fits.exceptions.FitsToolException;
import edu.harvard.hul.ois.fits.tools.ToolBase;
import edu.harvard.hul.ois.fits.tools.ToolInfo;
import edu.harvard.hul.ois.fits.tools.ToolOutput;
import edu.harvard.hul.ois.fits.tools.utils.XsltTransformMap;
public class MetadataExtractor extends ToolBase {
public final static String nlnzFitsConfig = Fits.FITS_XML+"nlnz"+File.separator+"fits"+File.separator;
private boolean enabled = true;
public MetadataExtractor() throws FitsException {
info = new ToolInfo("NLNZ Metadata Extractor","3.4GA","12/21/2007");
transformMap = XsltTransformMap.getMap(nlnzFitsConfig+"nlnz_xslt_map.xml");
}
public ToolOutput extractInfo(File file) throws FitsToolException {
Document dom = null;
//Document rawDom = null;
// Make sure the Harvester System is initialized.
//Config.getInstance();
Config.getInstance().setXMLBaseURL(Fits.FITS_XML+"nlnz");
// Get the appropriate adapter.
DataAdapter adapter = AdapterFactory.getInstance().getAdapter(file);
//The adapter's DTD to use for output
String outDTD = adapter.getOutputType();
//output stream to hold raw output from adapter
ByteArrayOutputStream adapterOutput = new ByteArrayOutputStream(2048);
//holder for the transformed adapter output
//ByteArrayOutputStream tAdapterOutput = new ByteArrayOutputStream(2048);
// Set up the parser context and listener to hold the adapter output
ParserContext pContext = new ParserContext();
ParserListener listener= new DTDXmlParserListener(adapterOutput, outDTD == null ? null
: Config.getInstance().getXMLBaseURL() + "/" + outDTD);
pContext.addListener(listener);
// Attempt to harvest the metadata.
try {
// Extract the metadata.
adapter.adapt(file, pContext);
//transformer to convert raw output to nlnz_presmet format
//TransformProcessor transformer = TransformProcessor.getInstance(outDTD, "nlnz_presmet.xsd");
//get the adapter output as a byte array
//byte[] adapterByteOutput = adapterOutput.toByteArray();
//temporary to get output prior to nlnz xslt conversion
//Document tmpDom = saxBuilder.build(new StringReader(new String(adapterByteOutput)));
//XmlUtils.printToConsole(tmpDom);
//transform adapter output byte array
//transformer.transform(new ByteArrayInputStream(adapterByteOutput),tAdapterOutput);
//convert the transformed output to a dom object
//InputSource is = new InputSource(new ByteArrayInputStream(tAdapterOutput.toByteArray()));
//is.setEncoding("UTF-8");
dom = saxBuilder.build(new StringReader(adapterOutput.toString()));
/*
//convert the adapter byte array output to a dom object
is = new InputSource(new ByteArrayInputStream(adapterByteOutput));
is.setEncoding("UTF-8");
try {
rawDom = docBuilder.parse(is);
} catch (SAXException e) {
e.printStackTrace();
}*/
}
catch (JDOMException e) {
throw new FitsToolException("Error parsing NLNZ Metadata Extractor XML output",e);
}
catch (Exception e) {
// harvesting metadata failed
throw new FitsToolException("NLNZ Metadata Extractor error while harvesting file "+file.getName(),e);
}
finally {
//done with the adapter output streams so close them
try {
adapterOutput.close();
//tAdapterOutput.close();
} catch (IOException e) {
throw new FitsToolException("Error closing NLNZ Metadata Extractor XML output stream",e);
}
}
//FileIdentity identity = null;
Document fitsXml = null;
if(dom != null) {
String format = dom.getRootElement().getName();
//String format = XmlUtils.getDomValue(dom,"Format");
if(format != null) {
String xsltTransform = (String)transformMap.get(format.toUpperCase());
if(xsltTransform != null) {
fitsXml = transform(nlnzFitsConfig+xsltTransform,dom);
}
}
}
//XmlUtils.printToConsole(dom);
output = new ToolOutput(this,fitsXml,dom);
return output;
}
/*
public boolean isIdentityKnown(FileIdentity identity) {
if(identity == null
|| identity.getMime() == null
|| identity.getMime().length() == 0
|| identity.getFormat() == null
|| identity.getFormat().length() == 0) {
return false;
}
String format = identity.getFormat();
String mime = identity.getMime();
if(format == null || mime.equalsIgnoreCase("file/unknown")) {
return false;
}
else {
return true;
}
}*/
public boolean isEnabled() {
return enabled;
}
public void setEnabled(boolean value) {
enabled = value;
}
}