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/*
* Conditions Of Use
*
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain. As a result, a formal
* license is not needed to use the software.
*
* This software is provided by NIST as a service and is expressly
* provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY. NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
*
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*
* .
*
*/
package android.gov.nist.javax.sip.parser;
import android.gov.nist.javax.sip.header.*;
import java.util.*;
import java.text.ParseException;
/**
* Generic header parser class. The parsers for various headers extend this
* class. To create a parser for a new header, extend this class and change
* the createParser class.
*
* @version 1.2 $Revision: 1.9 $ $Date: 2009-07-17 18:58:00 $
*
* @author M. Ranganathan
*
*
*/
public class HeaderParser extends Parser {
/**
* Parse the weekday field
* @return an integer with the calendar content for wkday.
*/
protected int wkday() throws ParseException {
dbg_enter("wkday");
try {
String tok = lexer.ttoken();
String id = tok.toLowerCase();
if (TokenNames.MON.equalsIgnoreCase(id))
return Calendar.MONDAY;
else if (TokenNames.TUE.equalsIgnoreCase(id))
return Calendar.TUESDAY;
else if (TokenNames.WED.equalsIgnoreCase(id))
return Calendar.WEDNESDAY;
else if (TokenNames.THU.equalsIgnoreCase(id))
return Calendar.THURSDAY;
else if (TokenNames.FRI.equalsIgnoreCase(id))
return Calendar.FRIDAY;
else if (TokenNames.SAT.equalsIgnoreCase(id))
return Calendar.SATURDAY;
else if (TokenNames.SUN.equalsIgnoreCase(id))
return Calendar.SUNDAY;
else
throw createParseException("bad wkday");
} finally {
dbg_leave("wkday");
}
}
/**
* parse and return a date field.
* @return a date structure with the parsed value.
*/
protected Calendar date() throws ParseException {
try {
Calendar retval = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
String s1 = lexer.number();
int day = Integer.parseInt(s1);
if (day <= 0 || day > 31)
throw createParseException("Bad day ");
retval.set(Calendar.DAY_OF_MONTH, day);
lexer.match(' ');
String month = lexer.ttoken().toLowerCase();
if (month.equals("jan")) {
retval.set(Calendar.MONTH, Calendar.JANUARY);
} else if (month.equals("feb")) {
retval.set(Calendar.MONTH, Calendar.FEBRUARY);
} else if (month.equals("mar")) {
retval.set(Calendar.MONTH, Calendar.MARCH);
} else if (month.equals("apr")) {
retval.set(Calendar.MONTH, Calendar.APRIL);
} else if (month.equals("may")) {
retval.set(Calendar.MONTH, Calendar.MAY);
} else if (month.equals("jun")) {
retval.set(Calendar.MONTH, Calendar.JUNE);
} else if (month.equals("jul")) {
retval.set(Calendar.MONTH, Calendar.JULY);
} else if (month.equals("aug")) {
retval.set(Calendar.MONTH, Calendar.AUGUST);
} else if (month.equals("sep")) {
retval.set(Calendar.MONTH, Calendar.SEPTEMBER);
} else if (month.equals("oct")) {
retval.set(Calendar.MONTH, Calendar.OCTOBER);
} else if (month.equals("nov")) {
retval.set(Calendar.MONTH, Calendar.NOVEMBER);
} else if (month.equals("dec")) {
retval.set(Calendar.MONTH, Calendar.DECEMBER);
}
lexer.match(' ');
String s2 = lexer.number();
int yr = Integer.parseInt(s2);
retval.set(Calendar.YEAR, yr);
return retval;
} catch (Exception ex) {
throw createParseException("bad date field");
}
}
/**
* Set the time field. This has the format hour:minute:second
*/
protected void time(Calendar calendar) throws ParseException {
try {
String s = lexer.number();
int hour = Integer.parseInt(s);
calendar.set(Calendar.HOUR_OF_DAY, hour);
lexer.match(':');
s = lexer.number();
int min = Integer.parseInt(s);
calendar.set(Calendar.MINUTE, min);
lexer.match(':');
s = lexer.number();
int sec = Integer.parseInt(s);
calendar.set(Calendar.SECOND, sec);
} catch (Exception ex) {
throw createParseException("error processing time ");
}
}
/**
* Creates new HeaderParser
* @param String to parse.
*/
protected HeaderParser(String header) {
this.lexer = new Lexer("command_keywordLexer", header);
}
protected HeaderParser(Lexer lexer) {
this.lexer = lexer;
this.lexer.selectLexer("command_keywordLexer");
}
/**
* Parse the SIP header from the buffer and return a parsed
* structure.
* @throws ParseException if there was an error parsing.
*/
public SIPHeader parse() throws ParseException {
String name = lexer.getNextToken(':');
lexer.consume(1);
String body = lexer.getLine().trim();
// we dont set any fields because the header is
// ok
ExtensionHeaderImpl retval = new ExtensionHeaderImpl(name);
retval.setValue(body);
return retval;
}
/**
* Parse the header name until the colon and chew WS after that.
*/
protected void headerName(int tok) throws ParseException {
this.lexer.match(tok);
this.lexer.SPorHT();
this.lexer.match(':');
this.lexer.SPorHT();
}
}
