/*
 * Copyright (C) 2005 Luca Veltri - University of Parma - Italy
 * 
 * This file is part of MjSip (http://www.mjsip.org)
 * 
 * MjSip is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * MjSip 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with MjSip; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * Author(s):
 * Luca Veltri (luca.veltri@unipr.it)
 * Nitin Khanna, Hughes Systique Corp. (Reason: Android specific change, optmization, bug fix) 
 */

package org.zoolu.sip.header;

import org.zoolu.sip.provider.SipParser;
import java.util.Vector;

/** SIP AuthenticationInfo header */
public class AuthenticationInfoHeader extends AuthenticationHeader {
	/** Creates a new AuthenticationInfoHeader */
	public AuthenticationInfoHeader() {
		super(SipHeaders.Authentication_Info, "");
	}

	/** Creates a new AuthenticationInfoHeader */
	public AuthenticationInfoHeader(String hvalue) {
		super(SipHeaders.Authentication_Info, hvalue);
	}

	/** Creates a new AuthenticationInfoHeader */
	public AuthenticationInfoHeader(Header hd) {
		super(hd);
	}

	/**
	 * Creates a new AuthenticationInfoHeader specifing the <i>auth_scheme</i>
	 * and the vector of authentication parameters.
	 * <p>
	 * <i>auth_param</i> is a vector of String of the form <i>parm_name</i>
	 * "=" <i>parm_value</i>
	 */
	/* HSC CHANGES START */
	public AuthenticationInfoHeader(Vector<String> auth_params) {
		/* HSC CHANGES END */
		super(SipHeaders.Authentication_Info, "", auth_params);
	}

	/** Whether has parameter <i>param_name</i> */
	public boolean hasParameter(String param_name) {
		char[] name_separators = { '=', ' ', '\t', '\r', '\n' };
		SipParser par = new SipParser(value);
		// par.skipString(); // skip the auth_scheme
		par.skipWSPCRLF();
		while (par.hasMore()) {
			String name = par.getWord(name_separators);
			if (name.equals(param_name))
				return true;
			par.goToCommaHeaderSeparator().skipChar().skipWSPCRLF();
		}
		return false;
	}

	/** Returns the parameter <i>param_name</i>, in case removing quotes. */
	public String getParameter(String param_name) {
		char[] name_separators = { '=', ' ', '\t' };
		SipParser par = new SipParser(value);
		// par.skipString(); // skip the auth_scheme
		par.skipWSPCRLF();
		while (par.hasMore()) {
			String name = par.getWord(name_separators);
			if (name.equals(param_name)) {
				par.goTo('=').skipChar().skipWSP();
				int comma = par.indexOfCommaHeaderSeparator();
				if (comma >= 0)
					par = new SipParser(par.getString(comma - par.getPos()));
				return par.getStringUnquoted();
			} else
				par.goToCommaHeaderSeparator().skipChar().skipWSPCRLF();
		}
		return null;
	}

	/**
	 * Gets a String Vector of parameter names.
	 * 
	 * @returns a Vector of String.
	 */
	/* HSC CHANGES BEGIN */
	public Vector<String> getParameters() {
		char[] name_separators = { '=', ' ', '\t' };
		SipParser par = new SipParser(value);
		// par.skipString(); // skip the auth_scheme
		par.skipWSPCRLF();
		Vector<String> names = new Vector<String>();
		while (par.hasMore()) {
			String name = par.getWord(name_separators);
			names.addElement(name);
			par.goToCommaHeaderSeparator().skipChar().skipWSPCRLF();
		}
		return names;
	}

	/* HSC CHANGES END */

	/**
	 * Gets the athentication scheme. Note that for AuthenticationInfoHeader it
	 * always return null.
	 */
	public String getAuthScheme() {
		return null;
	}
}
