package output;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

/**
 * Class to handle writing files
 * 
 * @author Rukmal Fernando
 * @author Hardik Kotecha
 * @author Radhika Srinivasan
 */
public class XMLFileWriter 
{
	private static XMLFileWriter reference;
	
	/**
	 * default constructor
	 */
	private XMLFileWriter()
	{
		reference = null;
	}
	
	/**
	 * Initialize a new XMLFileWriter if one does not exist
	 * @return InputReader
	 */
	public static XMLFileWriter initialize()
	{
		if( reference == null )
			return new XMLFileWriter();
		
		else
			return reference;
	}
	
	/**
	 * did the write successfully write the text pText to the File at pPath
	 * 
	 * @param pPath
	 * @param pText
	 * @return boolean
	 */
	public boolean writeFile( String pPath, String pText )
	{
		try
		{
			boolean exists = ( new File( pPath ) ).exists();                   //find out if the File exists
			
			if ( exists )                                                      //if the File already exists
			{
				boolean deleted = ( new File( pPath ) ).delete();              //delete the File
				
				if ( !deleted )
				{
					throw new IOException( "deletion of xml failed" );
				}
			}
	    
			File xmlFile = new File( pPath );                                  //create a new File
			boolean success = xmlFile.createNewFile();                         //check that the File was created
			
			if ( !success )                                                    //if the create failed
			{
				throw new IOException( "creation of xml failed" );             //throw an exception
			}
	    
			FileWriter fw = new FileWriter( pPath );
			BufferedWriter out = new BufferedWriter( fw );//create a write to the File
			out.write( /*xmlConst +*/ pText );                                 //write to the File
			out.flush();
			out.close();                                                       //close writer
			fw.close();
			System.out.println("Closing file " + pPath);
		}
		catch( IOException e )
		{
			e.printStackTrace();
		}
		
		return true;                                                           //write completed successfully
	}
}