Package adams.parser.spreadsheetquery

Class Scanner

  • All Implemented Interfaces:
    java_cup.runtime.Scanner
    public class Scanner
extends Object
implements java_cup.runtime.Scanner
    A scanner for spreadsheet queries.
    Author:
    FracPete (fracpete at waikato dot ac dot nz)

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected java_cup.runtime.SymbolFactory sf  
      static int STRING
      lexical states
      static int YYEOF
      This character denotes the end of file
      static int YYINITIAL  

    • Constructor Summary

      Constructors 
      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 java.io.InputStream version of this constructor.

    • 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 java.io.InputStream version of this constructor.
        Parameters:
        in - the java.io.Reader to read input from.

      • Scanner

        public Scanner​(InputStream in)
        Creates a new scanner. There is also java.io.Reader version of this constructor.
        Parameters:
        in - the java.io.Inputstream to read input from.

    • Method Detail

      • 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.
        Parameters:
        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
        Parameters:
        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
        Parameters:
        pos - the position of the character to fetch. A value from 0 to yylength()-1.
        Returns:
        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
        Parameters:
        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
        Returns:
        the next token
        Throws:
        IOException - if any I/O-Error occurs