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RequireParser.go
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RequireParser.go
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package parser
import (
"github.com/tutuvss/sip/core"
"github.com/tutuvss/sip/header"
)
/** SIPParser for Require header.
*/
type RequireParser struct {
HeaderParser
}
/** Creates a new instance of RequireParser
* @param require the header to parse
*/
func NewRequireParser(require string) *RequireParser {
this := &RequireParser{}
this.HeaderParser.super(require)
return this
}
/** Constructor
* @param lexer the lexer to use to parse the header
*/
func NewRequireParserFromLexer(lexer core.Lexer) *RequireParser {
this := &RequireParser{}
this.HeaderParser.superFromLexer(lexer)
return this
}
/** parse the String message
* @return SIPHeader (RequireList object)
* @throws SIPParseException if the message does not respect the spec.
*/
func (this *RequireParser) Parse() (sh header.Header, ParseException error) {
requireList := header.NewRequireList()
var ch byte
lexer := this.GetLexer()
this.HeaderName(TokenTypes_REQUIRE)
for ch, _ = lexer.LookAheadK(0); ch != '\n'; ch, _ = lexer.LookAheadK(0) {
r := header.NewRequire()
r.SetHeaderName(core.SIPHeaderNames_REQUIRE)
// Parsing the option tag
lexer.Match(TokenTypes_ID)
token := lexer.GetNextToken()
r.SetOptionTag(token.GetTokenValue())
lexer.SPorHT()
requireList.PushBack(r)
for ch, _ = lexer.LookAheadK(0); ch == ','; ch, _ = lexer.LookAheadK(0) {
lexer.Match(',')
lexer.SPorHT()
r = header.NewRequire()
// Parsing the option tag
lexer.Match(TokenTypes_ID)
token = lexer.GetNextToken()
r.SetOptionTag(token.GetTokenValue())
lexer.SPorHT()
requireList.PushBack(r)
}
}
return requireList, nil
}