问ANTLR 3解析问题

EN

grammar Bookings;
 
options {
    backtrack=true;
    memoize=true;
}

@header { 
package at.silverstrike.pcc.impl.tj3bookingsparser.grammar; 
}

@lexer::header {
package at.silverstrike.pcc.impl.tj3bookingsparser.grammar;
}


bookingsFile returns [DefaultBookingsFile bookingsFile]
    :
        {
            bookingsFile = new DefaultBookingsFile();
        }
        projectHeader
        projectIds
        (resourceDeclaration)*
        (task)*
        (
            suppStmt=supplementStatement {bookingsFile.addSupplementStatement( $suppStmt.suppStmt ); }
        )*
    ;
    
projectHeader
    :
        'project prj "' ANY_TEXT '" "1.0"' TJ3_BOOKING_TIME '-' TJ3_BOOKING_TIME '{' 
        '}' 
    ;
projectIds
    :
        'projectids prj'
    ;

resourceDeclaration
    :
        'resource' TJ3_IDENTIFIER TJ3_STRING
    ;

task
    :
        'task' TJ3_IDENTIFIER TJ3_STRING '{' ANY_TEXT '}'
    ;

supplementStatement returns [DefaultSupplementStatement suppStmt]
    :
        {
            suppStmt = new DefaultSupplementStatement();
        }
        'supplement task' taskId=TJ3_DOTTED_TASK_IDENTIFIER { suppStmt.setTaskId($taskId.text); } 
        '{' 
        (
            bStmt=bookingStatement {suppStmt.addBookingStatement( $bStmt.stmt ); }
        )*
        ANY_TEXT
        '}'
    ;

bookingStatement returns [DefaultBookingStatement stmt]
    :
    {
        stmt = new DefaultBookingStatement();
    }
        TJ3_IDENTIFIER ':' 
        'booking' 
        resource=TJ3_IDENTIFIER { stmt.setResource($resource.text); } 
        ib1=indBooking { stmt.addIndBooking($ib1.indBooking); } 
        (
            ',' 
            ib2=indBooking { stmt.addIndBooking($ib2.indBooking); }
        )* 
        overTimeEtc
    ;

indBooking returns [DefaultIndBooking indBooking]
    :
        startTime=TJ3_BOOKING_START_TIME '+' duration=TJ3_DURATION 'h' 
            {
                $indBooking = new DefaultIndBooking($startTime.text, $duration.text);
            }
    ;

overTimeEtc
    :
        '{' ANY_TEXT '}'
    ;

TJ3_IDENTIFIER
    : ('a'..'Z'|'A'..'Z') ('a'..'Z'|'A'..'Z'|'0'..'9'|'_')*
    ;

DIGIT
    : '0'..'9'
    ;

TJ3_STRING
    : '"' ('a'..'z'|'A'..'Z'|'0'..'9'|' '|'_')* '"'
    ;

ANY_TEXT
    : ('a'..'z'|'A'..'Z'|'0'..'9'|' '|'_')*
    ;
    
TJ3_DOTTED_TASK_IDENTIFIER
    : TJ3_IDENTIFIER ('.' TJ3_IDENTIFIER)*
    ;

TJ3_BOOKING_TIME
    : DIGIT DIGIT DIGIT DIGIT '-' DIGIT DIGIT '-' DIGIT DIGIT '-' DIGIT DIGIT ':' DIGIT DIGIT '-' TIMEZONE 
    ;

TJ3_BOOKING_START_TIME
    : DIGIT DIGIT DIGIT DIGIT '-' DIGIT DIGIT '-' DIGIT DIGIT ('-' DIGIT DIGIT ':' DIGIT DIGIT)? (TIMEZONE)?;

TIMEZONE
    : ('+'|'-')DIGIT DIGIT DIGIT DIGIT
    ;

TJ3_DURATION
    : FP_VALUE ('min' | 'h' | 'd' | 'w' | 'm' | 'y')
    ;

FP_VALUE
    : DIGIT+
    | DIGIT* '.' DIGIT*
    ;