package edu.vt.marian.WebGate;

import java.net.*;
import java.util.*;
import java.io.*;

import edu.vt.marian.common.*;
import edu.vt.marian.uip.*;




/** Class name: query_data_for_one_server
	Class description: this class represent the query data corresponds to a server
		it's a component of the class query_data	
	Author: Jianxin Zhao
	Finished time: ????, 1998
	Known bugs: none
	Platform: jdk1.1.5 under UNIX
*/

public class query_data_for_one_server
{
	/** this is just for debugging
	*/
	Debug debug;

	/** this is the uip server this object is corresponds to
	*/
	private uip_server us;

	/** this is the query data of this object
	*/
	private general_query_data gqd;


	/** this constructor will create a query data for one server object, the object
		is empty upon creation
	*/
	public query_data_for_one_server(Debug debug)
	{
		// first initialize data members
		init();

		this.debug = debug;
		gqd = new general_query_data(debug);
	}


	/** this constructor will create a query data for one server object from the 
		specified directory
	*/
	public query_data_for_one_server(String dir, Debug debug)
	{
		// first initialize data members
		init();

		this.debug = debug;
		gqd = new general_query_data(debug);
		
		// read out uip server
		set_server(new uip_server(dir + System.getProperty("file.separator")
						+ "uip_server", debug));

		// read out query data
		gqd = new general_query_data(dir + System.getProperty("file.separator")
						+ "query_data", debug);
	}


	/** this constructor will create a query data for one server object from the 
		specified directory
	*/
	public query_data_for_one_server(BufferedReader br, Debug debug)
	{
		// first initialize data members
		init();

		this.debug = debug;

		// read out uip server
		set_server(new uip_server(br, debug));

		// read out query data
		gqd = new general_query_data(br, debug);
	}

	
	/** this constructor will create a query data for one server object
		from a stream, this might be helpful for remote manage in the future
		(not implemented yet)
	*/
	public query_data_for_one_server(DataInputStream dis)
	{
	}


	/** this method will set the uip server of this object
	*/
	public String set_server(uip_server us)
	{
		if (us == null)
		{
			this.us = null;
			return null;
		}
		this.us = new uip_server(us.get_hostname(), us.get_port(), 
			us.get_short_description(), us.get_long_description(), debug);
		return "OK";
	}


	/** this method will return the server this object is corresponds to
	*/
	public uip_server get_server()
	{
		if (us == null)
		{
			return null;
		}
		uip_server server = new uip_server(us.get_hostname(), us.get_port(), 
			us.get_short_description(), us.get_long_description(), debug);
		return server;
	}


	/** this method will return all the field names of this object
	*/
	public Vector get_field_names()
	{
		return gqd.get_field_names();
	}


	/** this method will add the field with the specified value to this object
	*/
	public String add_field(String name, String value)
	{
		return gqd.add_field(name, value);
	}


	/** this method will set the specified field to the specified value
		for this object
	*/
	public String set_field(String name, String value)
	{
		return gqd.set_field(name, value);
	}


	/** this method will delete the specified field from this object
	*/
	public String delete_field(String name)
	{
		return gqd.delete_field(name);
	}


	/** this method will return the value of the specified field of this object
	*/
	public String get_value(String field_name)
	{
		return gqd.get_value(field_name);
	}


	/** this method will set the relation between the fields of this object
	*/
	public String set_relation(String relation)
	{
		return gqd.set_relation(relation);
	}


	/** this method will return the relationship between fields of this object
	*/
	public String get_relation()
	{
		return gqd.get_relation();
	}


	/** this method will return all the preference names of this object
	*/
	public Vector get_preference_names()
	{
		return gqd.get_preference_names();
	}


	/** this method will return the value of the specified preference 
		of this object
	*/
	public String get_preference_value(String name)
	{
		return gqd.get_preference_value(name);
	}


	/** this method will add the specified preference with the specified
		value to this object 
	*/
	public String add_preference(String name, String value)
	{
		return gqd.add_preference(name, value);
	}


	/** this method will set the specified preference with the specified value
	*/
	public String set_preference(String name, String value)
	{
		return gqd.set_preference(name, value);
	}
	

	/** this method will delete the specified preference from this object
	*/
	public String delete_preference(String name)
	{
		return gqd.delete_preference(name);
	}


	/** this method will print the content of this object to a stream, this might
		be helpful for remote management in the future
	*/
	public String to_stream(DataOutputStream dos)
	{
		return null;  // not implemented yet
	}


	/** this method will save the content of this object to the specified directory
		or file
	*/
	public String save(String dir)
	{
		File file = new File(dir);
		try
		{
			file.mkdir();
		}
		catch (SecurityException e)
		{
			debug.dumpTrace("class qdfos: can not create directory");
		}

		// save the uip server
		us.save(dir + System.getProperty("file.separator") + "uip_server");

		// save the query data
		gqd.save(dir + System.getProperty("file.separator") + "query_data");

		return "OK";
	}


	/** this method will save the content of this object to the specified directory
		or file
	*/
	public String save(PrintWriter pw)
	{
		// save the uip server
		us.to_stream(pw);

		// save the query data
		gqd.save(pw);

		return "OK";
	}

	
	/** this method will initialize the data members of this object
	*/
	private void init()
	{
		debug = null;
		us = null;
		gqd = null;
	}
}