01: /*
02: * hgcommons 7
03: * Hammurapi Group Common Library
04: * Copyright (C) 2003 Hammurapi Group
05: *
06: * This program is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Lesser General Public
08: * License as published by the Free Software Foundation; either
09: * version 2 of the License, or (at your option) any later version.
10: *
11: * This program is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * Lesser General Public License for more details.
15: *
16: * You should have received a copy of the GNU Lesser General Public
17: * License along with this library; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19: *
20: * URL: http://www.hammurapi.biz/hammurapi-biz/ef/xmenu/hammurapi-group/products/products/hgcommons/index.html
21: * e-Mail: support@hammurapi.biz
22: */
23: package biz.hammurapi.util;
24:
25: import java.util.Collection;
26: import java.util.Iterator;
27:
28: /**
29: * Converts collection into visitable
30: * @author Pavel Vlasov
31: * @version $Revision: 1.5 $
32: */
33: public class CollectionVisitable implements Visitable {
34: private Collection collection;
35: private boolean visitCollection;
36:
37: public boolean accept(Visitor visitor) {
38: if (visitor == null || collection == null) {
39: return false;
40: }
41:
42: if (!visitCollection || visitor.visit(collection)) {
43: Iterator it = collection.iterator();
44: while (it.hasNext()) {
45: VisitableBase.object2visitor(it.next(), visitor);
46: }
47:
48: if (visitCollection && visitor instanceof PoliteVisitor) {
49: ((PoliteVisitor) visitor).leave(collection);
50: }
51: return true;
52: }
53:
54: return false;
55: }
56:
57: /**
58: * @param collection
59: * @param visitCollection true - visitor visits the collection and its elements; false - only elements
60: */
61: public CollectionVisitable(Collection collection,
62: boolean visitCollection) {
63: super();
64: this.collection = collection;
65: this.visitCollection = visitCollection;
66: }
67: }
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