01: /*
02: * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun in the LICENSE file that accompanied this code.
10: *
11: * This code is distributed in the hope that it will be useful, but WITHOUT
12: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * version 2 for more details (a copy is included in the LICENSE file that
15: * accompanied this code).
16: *
17: * You should have received a copy of the GNU General Public License version
18: * 2 along with this work; if not, write to the Free Software Foundation,
19: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20: *
21: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25: package com.sun.xml.internal.xsom.impl.util;
26:
27: import java.util.Iterator;
28:
29: /**
30: *
31: *
32: * @author
33: * Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
34: */
35: public class ConcatIterator implements Iterator {
36:
37: private Iterator lhs, rhs;
38:
39: public ConcatIterator(Iterator _lhs, Iterator _rhs) {
40: this .lhs = _lhs;
41: this .rhs = _rhs;
42: }
43:
44: public boolean hasNext() {
45: if (lhs != null) {
46: if (lhs.hasNext())
47: return true;
48: lhs = null; // no more item in lhs
49: }
50: return rhs.hasNext();
51: }
52:
53: public Object next() {
54: if (lhs != null)
55: return lhs.next();
56: else
57: return rhs.next();
58: }
59:
60: public void remove() {
61: if (lhs != null)
62: lhs.remove();
63: else
64: rhs.remove();
65: }
66:
67: }
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