package com.xmlcalabash.extensions;
import com.xmlcalabash.library.DefaultStep;
import com.xmlcalabash.io.WritablePipe;
import com.xmlcalabash.io.ReadablePipe;
import com.xmlcalabash.core.XProcRuntime;
import com.xmlcalabash.core.XProcException;
import com.xmlcalabash.runtime.XAtomicStep;
import com.xmlcalabash.util.S9apiUtils;
import com.deltaxml.core.DXPConfiguration;
import com.deltaxml.core.PipelinedComparator;
import net.sf.saxon.s9api.*;
import javax.xml.transform.sax.SAXSource;
import java.io.StringWriter;
import java.io.StringReader;
import org.xml.sax.InputSource;
/**
* Created by IntelliJ IDEA.
* User: ndw
* Date: Oct 21, 2008
* Time: 8:51:10 AM
* To change this template use File | Settings | File Templates.
*/
public class DeltaXML extends DefaultStep {
private ReadablePipe source = null;
private ReadablePipe alternate = null;
private ReadablePipe dxp = null;
private WritablePipe result = null;
/** Creates a new instance of Unzip */
public DeltaXML(XProcRuntime runtime, XAtomicStep step) {
super(runtime,step);
}
public void setInput(String port, ReadablePipe pipe) {
if ("source".equals(port)) {
source = pipe;
} else if ("alternate".equals(port)) {
alternate = pipe;
} else {
dxp = pipe;
}
}
public void setOutput(String port, WritablePipe pipe) {
result = pipe;
}
public void reset() {
result.resetWriter();
}
public void run() throws SaxonApiException {
super.run();
XdmNode docA = source.read();
XdmNode docB = alternate.read();
XdmNode dxpdoc = dxp.read();
try {
DXPConfiguration dxpconfig = new DXPConfiguration(S9apiUtils.xdmToInputSource(runtime, dxpdoc), null, false);
PipelinedComparator comparator = dxpconfig.generate();
// FIXME: Grotesque hackery!
StringWriter sw = new StringWriter();
Serializer serializer = new Serializer();
serializer.setOutputWriter(sw);
S9apiUtils.serialize(runtime, docA, serializer);
String docAxml = sw.toString();
sw = new StringWriter();
serializer = new Serializer();
serializer.setOutputWriter(sw);
S9apiUtils.serialize(runtime, docB, serializer);
String docBxml = sw.toString();
StringBuffer buf = new StringBuffer();
comparator.compare(docAxml, docBxml, buf);
StringReader sr = new StringReader(buf.toString());
XdmNode doc = runtime.parse(new InputSource(sr));
result.write(doc);
} catch (Exception e) {
throw new XProcException(e);
}
}
}