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Java > Open Source Codes > antlr > collections > Enumerator


1 package antlr.collections;
2
3 /* ANTLR Translator Generator
4  * Project led by Terence Parr at http://www.jGuru.com
5  * Software rights: http://www.antlr.org/RIGHTS.html
6  *
7  * $Id: //depot/code/org.antlr/main/main/antlr/collections/Enumerator.java#4 $
8  */
9
10 public interface Enumerator {
11     /**Return the element under the cursor; return null if !valid() or
12      * if called before first next() call.
13      */
14     public Object JavaDoc cursor();
15
16     /**Return the next element in the enumeration; first call to next()
17      * returns the first element.
18      */
19     public Object JavaDoc next();
20
21     /**Any more elements in the enumeration? */
22     public boolean valid();
23 }
24
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