import java.lang.*;
import java.io.*;
import java.util.*;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;
import org.jdom.*;
public class Speed
{
	public static Document getDoc(String fin)throws Exception
	{
		SAXBuilder builder = new SAXBuilder(false);
		Document jd = builder.build(new File(fin));
		return jd;
	}
 	
 	public static Document saveDoc(Document doc,String fout)throws Exception
 	{
 		XMLOutputter outputter = new XMLOutputter();
 		FileOutputStream fous = new FileOutputStream(fout);
 		outputter.output(doc,fous);
 		fous.close();
 		return doc;
 	}
	public static void test()
 	{
 		try{
	 		Document xml = getDoc("poem_gen.xml");
	 		Element root = xml.getRootElement();
	 		Date dt = new Date();
	 		System.out.println(dt.getHours()+":"+dt.getMinutes()+":"+dt.getSeconds());
	 		recursive(root);
	 		Date dt1 = new Date();
	 		System.out.println(dt1.getHours()+":"+dt1.getMinutes()+":"+dt1.getSeconds());
	 		saveDoc(xml,"x.xml");
	 	}catch(Exception e){e.printStackTrace();}
	 		
 	}
 	public static void recursive(Element elem)
 	{
 		if(elem == null)
 		{
 			return;
 		}
// 		if(elem.getChild("par")!= null)
// 		{
// 			System.out.println("find par");
// 			del(elem);
// 		}
		del(elem);
 		//System.out.println(elem.getName());
		List childList = elem.getChildren();
		Iterator ii = childList.iterator();
		while(ii.hasNext())
		{
			Element e = (Element)ii.next();
			recursive(e);
		}
 		
 	}
 	public static void del(Element elem)
 	{
 		List parList = elem.getChildren();
 		Iterator i = parList.iterator();
 		while(i.hasNext())
 		{
 			//System.out.println("del");
 			Element d = (Element)i.next();
 			if(d.getName().equals("par"))
 			{
	 			i.remove();
	 			elem.removeContent(d);
	 		}
 			
 		}
	}
	public static void main(String[] arg)
	{
		test();
	} 
}