Package edu.isi.pegasus.planner.parser

Class SiteCatalogTextScanner

  • class SiteCatalogTextScanner
extends java.lang.Object
    Implements the scanner for reserved words and other tokens that are generated from the input stream. This class is module-local on purpose.
    Author:
    Jens Vöckler

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private java.io.LineNumberReader m_in
      Stores the stream from which we are currently scanning.
      private int m_lookAhead
      Captures the look-ahead character.

    • Constructor Summary

      Constructors 
      Constructor Description
      SiteCatalogTextScanner​(java.io.Reader reader)
      Starts to scan the given stream.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int getLineNumber()
      Obtains the current line number in the input stream from the outside.
      boolean hasMoreTokens()
      Checks for the availability of more input.
      Token nextToken()
      Obtains the next token from the input stream.
      private void skipWhitespace()
      Skips any white space and comments in the input.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • m_in

        private java.io.LineNumberReader m_in
        Stores the stream from which we are currently scanning.

      • m_lookAhead

        private int m_lookAhead
        Captures the look-ahead character.

    • Constructor Detail

      • SiteCatalogTextScanner

        public SiteCatalogTextScanner​(java.io.Reader reader)
                       throws java.io.IOException
        Starts to scan the given stream.
        Parameters:
        reader - the reader stream from which we are reading the site catalog.
        Throws:
        java.io.IOException

    • Method Detail

      • getLineNumber

        public int getLineNumber()
        Obtains the current line number in the input stream from the outside.
        Returns:
        the current line number.

      • skipWhitespace

        private void skipWhitespace()
                     throws java.io.IOException
        Skips any white space and comments in the input. This method stops either at the end of file, or at any non-whitespace input character.
        Throws:
        java.io.IOException

      • hasMoreTokens

        public boolean hasMoreTokens()
                      throws java.io.IOException
        Checks for the availability of more input.
        Returns:
        true, if there is more to read, false for EOF.
        Throws:
        java.io.IOException

      • nextToken

        public Token nextToken()
                throws java.io.IOException,
                       ScannerException
        Obtains the next token from the input stream.
        Returns:
        an instance conforming to the token interface, or null for eof.
        Throws:
        java.io.IOException - if something went wrong while reading
        java.lang.Exception - if a lexical error was encountered.
        ScannerException