test.java

JAVA在编译原理上的应用。

package lolo.test;

import lolo.Input;
import lolo.Scan;
import lolo.Scanner;

import lolo.scans.CComment;
import lolo.scans.Char;
import lolo.scans.Flt;
import lolo.scans.HashComment;
import lolo.scans.Int;
import lolo.scans.JavaIdentifier;
import lolo.scans.JavaWhitespace;
import lolo.scans.JavadocComment;
import lolo.scans.QuotedChar;
import lolo.scans.QuotedText;
import lolo.scans.Set;
import lolo.scans.SetMN;
import lolo.scans.SimpleIdentifier;
import lolo.scans.SimpleWhitespace;
import lolo.scans.SlashSlashComment;
import lolo.scans.Word;
import lolo.scans.XMLStartOfElement;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.StringReader;
import java.io.Serializable;

/** An example to test all features (Serialization, removing symbols, Unicode scanners,
 * Action objects, non serializable Action objects, ...) and classes.
 *
 * @author <a href="http://www.inf.uos.de/bernd" target="_blank">Bernd K&uuml;hl</a>
           (<a href="mailto:[e-mail]">[e-mail]</a>)
 */
public class Test {
    // make Actions serializable...
	protected static interface Action extends lolo.Scan.Action, Serializable {
	}
    public static void main(String args[]) throws Exception {
        Action wordAction = new Action () {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found word -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        };
        lolo.Scan.Action numberAction = new lolo.Scan.Action () {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found number -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        };
        Action commentAction = new Action () {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found comment -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        };

        Scanner scanner = new Scanner();
        scanner.debug = true; 
        boolean changed = scanner.add(new Scan[] {
            new Word("<=").setAction(wordAction),
            new Word(">=").setAction(wordAction),
            new Word("==").setAction(wordAction),
            new Word("&&").setAction(wordAction),
            new Word("||").setAction(wordAction)
        });
        System.err.println("add(Scan[]) result: "+changed);
        changed = scanner.add(new Scan[] {
            new Word("<=").setAction(wordAction),
            new Word(">=").setAction(wordAction),
            new Word("==").setAction(wordAction),
            new Word("&&").setAction(wordAction),
            new Word("||").setAction(wordAction)
        });
        System.err.println("add(Scan[]) result: "+changed);
        changed = scanner.add(new SlashSlashComment().setAction(commentAction).setIgnore(false));
        System.err.println("add(new SlashSlashComment) result: "+changed);
        changed = scanner.add(new SlashSlashComment().setAction(commentAction).setIgnore(false));
        System.err.println("add(new SlashSlashComment) result: "+changed);
        scanner.add(new Int().setAction(numberAction));
        scanner.add(new Flt(true).setAction(numberAction));
        scanner.add(new SimpleWhitespace().setIgnore(false).setAction(new Action() {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found whitespace -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        }));
        scanner.add(new HashComment().setAction(commentAction).setIgnore(false));
        scanner.add(new JavadocComment().setAction(commentAction).setIgnore(false));
        scanner.add(new CComment(true).setAction(commentAction).setIgnore(false));
        scanner.add(new SetMN("abc", true, 2, 5).setAction(new Action() {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found setmn -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        }));
        scanner.add(new SetMN("@", true, 1, 1).setAction(new Action() {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found @ -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        }));
        scanner.add(new XMLStartOfElement("elem").setAction(new Action() {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found start of element -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        }));
        scanner.add(new Set("+-=/*!<>?:;|[]{}().,%&").setAction(new Action() {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found single java character -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        }));
        scanner.add(new Word("bjk").setAction(new Action() {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found word -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        }));
        scanner.add(new SimpleIdentifier().setAction(new Action() {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found identifier -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        }));
        scanner.add(new QuotedText().setAction(new Action() {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found quoted text -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        }));
        scanner.add(new QuotedChar().setAction(new Action() {
            public void action(Scan sender, char [] buffer, int off, int len) {
                System.err.println("found char constant -"+new String(buffer, off, len)+"-\tsender is "+sender);
            }
        }));
        scanner.pack();

        ObjectOutputStream out;
        ObjectInputStream in;

// number actions are not serializable..

System.err.println("serialzing scanner...");
        out = new ObjectOutputStream(new FileOutputStream("x.ser"));
        out.writeObject(scanner);
        out.flush(); out.close();
        
        scanner = null;
        
System.err.println("deserialzing scanner...");
        in = new ObjectInputStream(new FileInputStream("x.ser"));
        scanner = (Scanner) in.readObject();
        in.close();

System.err.println("go...");
        Input input = new Input(new InputStreamReader(System.in), 2);
        Scan winner;
        while ((winner = scanner.scan(input)) != null)
            ;

                
System.err.println("make unicode scanner...");
        scanner.setUnicode(true);  // forces repack of table
        scanner.pack();

System.err.println("serialzing scanner...");
        out = new ObjectOutputStream(new FileOutputStream("x.ser"));
        out.writeObject(scanner);
        out.flush(); out.close();
        
        scanner = null;
        
System.err.println("deserialzing scanner...");
long old = System.currentTimeMillis();
System.err.println("start time deserialzing\t"+old+"...");
        in = new ObjectInputStream(new FileInputStream("x.ser"));
        scanner = (Scanner) in.readObject();
long current = System.currentTimeMillis();
System.err.println("end time deserialzing\t"+current+"...");
TimeUtil.printMilliSecons("time: ",current-old, System.err);
        in.close();

System.err.println("go...");
        input = new Input(new InputStreamReader(System.in), 2);
        while ((winner = scanner.scan(input)) != null)
            ;

System.err.println("scanner.contains(new Word(\"&&\"))..."+scanner.contains(new Word("&&")));
System.err.println("scanner.remove(new Word(\"&&\"))..."+scanner.remove(new Word("&&")));
System.err.println("go...");
        input = new Input(new InputStreamReader(System.in), 2);
        while ((winner = scanner.scan(input)) != null)
            ;

System.err.println("scanner.contains(new Word(\"&&\"))..."+scanner.contains(new Word("&&")));
System.err.println("scanner.remove(new Word(\"&&\"))..."+scanner.remove(new Word("&&")));
System.err.println("go...");
        input = new Input(new InputStreamReader(System.in), 2);
        while ((winner = scanner.scan(input)) != null)
            ;

System.err.println("scanner.contains(new JavadocComment())..."+scanner.contains(new JavadocComment()));
System.err.println("scanner.remove(new JavadocComment())..."+scanner.remove(new JavadocComment()));
System.err.println("go...");
        input = new Input(new InputStreamReader(System.in), 2);
        while ((winner = scanner.scan(input)) != null)
            ;

System.err.println("scanner.contains(new Flt())..."+scanner.contains(new Flt(false)));
System.err.println("scanner.remove(new Flt())..."+scanner.remove(new Flt(false)));
System.err.println("scanner.contains(new Flt())..."+scanner.contains(new Flt(true)));
System.err.println("scanner.remove(new Flt())..."+scanner.remove(new Flt(true)));
System.err.println("go...");
        input = new Input(new InputStreamReader(System.in), 2);
        while ((winner = scanner.scan(input)) != null)
            ;

System.err.println("scanner.contains(new Flt())..."+scanner.contains(new Flt(true)));
System.err.println("scanner.remove(new Flt())..."+scanner.remove(new Flt(true)));
System.err.println("go...");
        input = new Input(new InputStreamReader(System.in), 2);
        while ((winner = scanner.scan(input)) != null)
            ;

System.err.println("scanner.contains(new XMLStartOfElement(\"elem\"))..."+scanner.contains(new XMLStartOfElement("elem")));
System.err.println("scanner.remove(new XMLStartOfElement(\"elem\"))..."+scanner.remove(new XMLStartOfElement("elem")));
System.err.println("scanner.contains(new XMLStartOfElement(\"elem\"))..."+scanner.contains(new XMLStartOfElement("elem")));
System.err.println("go...");
        input = new Input(new InputStreamReader(System.in), 2);
        while ((winner = scanner.scan(input)) != null)
            ;
    }

}