package simpledb.cs422;

import java.io.IOException;
import java.io.StreamTokenizer;
import java.io.StringReader;

public class StreamTokenizerTest {

    public static void main( String args[] ) throws IOException
    {
        String s = "SELECT * from t1, t2 where t1.a = t2.b and c >= 10 or d < 'hello'";

        StreamTokenizer tokenizer = new StreamTokenizer( new StringReader( s ) );
        tokenizer.lowerCaseMode( true );
        do
        {
            tokenizer.nextToken();
            switch( tokenizer.ttype )
            {
                case StreamTokenizer.TT_NUMBER:
                    System.out.println( "Number:\t\t\t" + tokenizer.nval );
                    break;

                case StreamTokenizer.TT_WORD:
                    System.out.println( "Word:\t\t\t" + tokenizer.sval );
                    break;

                case StreamTokenizer.TT_EOL:
                    System.out.println( "Eod of Line" );
                    break;

                case StreamTokenizer.TT_EOF:
                    System.out.println( "End of Stream" );
                    break;

                /* single quote string */
                case '\'':
                    System.out.println( "Single-quote String:\t" + tokenizer.sval );
                    break;

                /* double quote string */
                case '\"':
                    System.out.println( "Double-quote String:\t" + tokenizer.sval );
                    break;

                /* single-character token */
                default:
                    System.out.println( "Single-character token:\t"
                        + (char) tokenizer.ttype );
            }
        } while( tokenizer.ttype != StreamTokenizer.TT_EOF );
    }

}