AcceptorFactory.java

/*
 *                 Sun Public License Notice
 * 
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 * 
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2000 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.editor;

/** Mostly used acceptors
*
* @author Miloslav Metelka
* @version 1.00
*/


public class AcceptorFactory {

    public static final Acceptor TRUE = new Fixed(true);

    public static final Acceptor FALSE = new Fixed(false);

    public static final Acceptor NL = new Char('\n');

    public static final Acceptor SPACE_NL = new TwoChar(' ', '\n');

    public static final Acceptor WHITESPACE
    = new Acceptor() {
          public final boolean accept(char ch) {
              return Character.isWhitespace(ch);
          }
      };

    public static final Acceptor LETTER_DIGIT
    = new Acceptor() {
          public final boolean accept(char ch) {
              return Character.isLetterOrDigit(ch);
          }
      };

    public static final Acceptor JAVA_IDENTIFIER
    = new Acceptor() {
          public final boolean accept(char ch) {
              return Character.isJavaIdentifierPart(ch);
          }
      };

    public static final Acceptor NON_JAVA_IDENTIFIER
    = new Acceptor() {
          public final boolean accept(char ch) {
              return !Character.isJavaIdentifierPart(ch);
          }
      };

    private static final class Fixed implements Acceptor {
	private boolean state;
	
	public Fixed(boolean state) {
	    this.state = state;
	}
        
	public final boolean accept(char ch) {
              return state;
	}
    }

    private static final class Char implements Acceptor {
	private char hit;
	
	public Char(char hit) {
	    this.hit = hit;
	}
        
	public final boolean accept(char ch) {
              return ch == hit;
	}
    }

    private static final class TwoChar implements Acceptor {
	private char hit1, hit2;
	
	public TwoChar(char hit1, char hit2) {
	    this.hit1 = hit1;
	    this.hit2 = hit2;
	}
        
	public final boolean accept(char ch) {
              return ch == hit1 || ch == hit2;
	}
    }


}