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package org.madore.damlengine;

import java.io.OutputStreamWriter;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import org.xml.sax.EntityResolver;
import org.apache.xerces.jaxp.DocumentBuilderFactoryImpl;

public final class DamlEngine {

    public static final String XML_NS = "http://www.w3.org/XML/1998/namespace";
    public static final String XHTML_NS = "http://www.w3.org/1999/xhtml";
    public static final String DAML_NS = "http://www.madore.org/~david/NS/daml/";

    private DamlEngine() { }  // Forbid instantiation

    public static class RootOptions extends TodoItem.Options {
    }

    public static void processDocument(Document doc) {
	TodoDeque todoDeque = new TodoDeque();
	Context ctx = new Context(doc);
	TodoItem.Options options = new RootOptions();
	todoDeque.
	    registerAtEnd(TodoElement.getTodoElement(doc.getDocumentElement(),
						     ctx, options));
	todoDeque.dispatchLoop();
    }

    public static void main(String[] args)
	throws Exception {

	final Resolver resolver = new Resolver();
        final DocumentBuilderFactory dbf = new DocumentBuilderFactoryImpl();
        dbf.setNamespaceAware(true);
        dbf.setValidating(false);
	final DocumentBuilder db = dbf.newDocumentBuilder();
	db.setEntityResolver((EntityResolver)resolver);

	if ( args.length == 0 ) {
	    System.err.println("expecting filename as argument");
	}

	for (String fname : args) {
	    Document doc = db.parse(fname);
	    processDocument(doc);
	    doc.normalizeDocument();
	    Unparser unparser
		= new Unparser(doc, new OutputStreamWriter(System.out));
	    unparser.unparse();
	}

    }

}