package org.madore.damlengine;

import java.util.LinkedList;
import java.util.HashMap;
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 DAML_NS = "http://www.madore.org/~david/NS/daml/";

    static Document doc;

    private DamlEngine() { }  // Forbid instantiation

    public static void processDocument() {
	TodoDeque todoDeque = new TodoDeque();
	HashMap<String,Object> options = new HashMap<String,Object>();
	options.put("isRoot", true);
	todoDeque.registerAtEnd(TodoElement.getTodoElement(doc.getDocumentElement(),
							   new HashMap<String,Object>(),
							   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) {
	    doc = db.parse(fname);
	    processDocument();
	    doc.normalizeDocument();
	    Unparser unparser
		= new Unparser(doc, new OutputStreamWriter(System.out));
	    unparser.unparse();
	}

    }

}