Class Scanner

  • All Implemented Interfaces:

    public class Scanner
    extends Object
    implements java_cup.runtime.Scanner
    A scanner for date expressions.
    FracPete (fracpete at waikato dot ac dot nz)
    • Field Summary

      Modifier and Type Field Description
      protected static DateFormat m_Format  
      protected java_cup.runtime.SymbolFactory sf  
      static int YYEOF
      This character denotes the end of file
      static int YYINITIAL
      lexical states
    • Constructor Summary

      Constructor Description
      Scanner​(InputStream in)
      Creates a new scanner.
      Scanner​(InputStream r, java_cup.runtime.SymbolFactory sf)  
      Scanner​(Reader in)
      Creates a new scanner There is also a version of this constructor.
    • Field Detail

      • YYEOF

        public static final int YYEOF
        This character denotes the end of file
        See Also:
        Constant Field Values
      • sf

        protected java_cup.runtime.SymbolFactory sf
    • Constructor Detail

      • Scanner

        public Scanner​(InputStream r,
                       java_cup.runtime.SymbolFactory sf)
      • Scanner

        public Scanner​(Reader in)
        Creates a new scanner There is also a version of this constructor.
        in - the to read input from.
      • Scanner

        public Scanner​(InputStream in)
        Creates a new scanner. There is also version of this constructor.
        in - the to read input from.
    • Method Detail

      • getFormat

        protected static DateFormat getFormat()
        Returns the formatter for parsing.
        the formatter
      • yyreset

        public final void yyreset​(Reader reader)
        Resets the scanner to read from a new input stream. Does not close the old reader. All internal variables are reset, the old input stream cannot be reused (internal buffer is discarded and lost). Lexical state is set to ZZ_INITIAL.
        reader - the new input stream
      • yystate

        public final int yystate()
        Returns the current lexical state.
      • yybegin

        public final void yybegin​(int newState)
        Enters a new lexical state
        newState - the new lexical state
      • yytext

        public final String yytext()
        Returns the text matched by the current regular expression.
      • yycharat

        public final char yycharat​(int pos)
        Returns the character at position pos from the matched text. It is equivalent to yytext().charAt(pos), but faster
        pos - the position of the character to fetch. A value from 0 to yylength()-1.
        the character at position pos
      • yylength

        public final int yylength()
        Returns the length of the matched text region.
      • yypushback

        public void yypushback​(int number)
        Pushes the specified amount of characters back into the input stream. They will be read again by then next call of the scanning method
        number - the number of characters to be read again. This number must not be greater than yylength()!
      • next_token

        public java_cup.runtime.Symbol next_token()
                                           throws IOException
        Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.
        Specified by:
        next_token in interface java_cup.runtime.Scanner
        the next token
        IOException - if any I/O-Error occurs