/* // $Id: //guest/julian_hyde/saffron/src/main/saffron/runtime/CompoundIterator.java#1 $ // Saffron preprocessor and data engine // Copyright (C) 2002 Julian Hyde <julian.hyde@mail.com> // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Library General Public // License as published by the Free Software Foundation; either // version 2 of the License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Library General Public License for more details. // // You should have received a copy of the GNU Library General Public // License along with this library; if not, write to the // Free Software Foundation, Inc., 59 Temple Place - Suite 330, // Boston, MA 02111-1307, USA. // // See the COPYING file located in the top-level-directory of // the archive of this library for complete text of license. // // jhyde, May 1, 2002 */ package saffron.runtime; import java.util.Iterator; import java.util.Collections; /** * <code>CompoundIterator</code> creates an iterator out of several. */ public class CompoundIterator implements Iterator { private Iterator[] iterators; private int i; private Iterator iterator; public CompoundIterator(Iterator[] iterators) { this.iterators = iterators; this.i = 0; nextIterator(); } private void nextIterator() { while (i < iterators.length) { iterator = iterators[i++]; if (iterator.hasNext()) { return; } } iterator = Collections.EMPTY_LIST.iterator(); } public boolean hasNext() { return iterator.hasNext(); } public Object next() { Object o = iterator.next(); if (!iterator.hasNext()) { nextIterator(); } return o; } public void remove() { iterator.remove(); } } // End CompoundIterator.java
# | Change | User | Description | Committed | |
---|---|---|---|---|---|
#1 | 1749 | Julian Hyde |
saffron: Oops, forgot some files. |