/*
 * OrderGxl.java
 *
 * Copyright (C) 2003 Miika Nurminen
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */
import java.io.*;
import org.w3c.dom.*;

/**
 * Reorders contents of GXL file such that nodes are before edges.
 * (potential use case: importing gxl file to jgraph)
 * @author Miika Nurminen
 */
class GxlOrderer extends XmlTransformFramework {

  public GxlOrderer(InputStream in, PrintStream out) {
    super(in,out);
  }
  
  protected void doTransform() {
  
   /* ks. gxl2touchgraph: luo uusi dokumentti (/lataa pohja) ja kopioi siihen
      toisen dokumentin solmut */
   try {
   Document outDoc = this.newDocument(null);
   Element e = doc.getDocumentElement();
   e.setAttribute("xmlns:xlink","http://www.w3.org/1999/xlink");
   DomLib.copyNodes(e, outDoc, outDoc, 1);
   
   Node n = (outDoc.getElementsByTagName("graph")).item(0);
   
   
   DomLib.copyNodeList(doc.getElementsByTagName("node"), n, outDoc, true);
   DomLib.copyNodeList(doc.getElementsByTagName("edge"), n, outDoc, true);
  
   doc = outDoc;
   }
   catch (Exception e) { // on exceptions no changes are done to the document
     ErrorLib.errorReport(e);
   }
   this.setDoctype("http://www.gupro.de/GXL/gxl-1.0.dtd",null);
 }

}

/**
 *
 * @author  Miika Nurminen
 */
public class OrderGxl {
  
  /** Creates a new instance of OrderGxl */
  public OrderGxl() {
  }
  
  /**
   * @param args the command line arguments
   */
  public static void main(String[] args) {
    FileArgumentScheme m = new FileArgumentScheme(args);
    try {
      m.openStreams();
      
      GxlOrderer o = new GxlOrderer(m.getInput(),m.getOutput());
      o.performTransform();
    }
    catch (FileNotFoundException e) {
      ErrorLib.errorReport(e);
    }
    try {
      m.getInput().close();
      m.getOutput().close();
    }
    catch (IOException e) {
      ErrorLib.errorReport(e);
    }
  }
  
}