01: /*
02: * Portions 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:
26: package com.sun.tools.internal.ws.wsdl.framework;
27:
28: import java.util.ArrayList;
29: import java.util.Iterator;
30: import java.util.List;
31: import java.util.NoSuchElementException;
32:
33: /**
34: * A helper class for extensible entities.
35: *
36: * @author WS Development Team
37: */
38: public class ExtensibilityHelper {
39:
40: public ExtensibilityHelper() {
41: }
42:
43: public void addExtension(Extension e) {
44: if (_extensions == null) {
45: _extensions = new ArrayList();
46: }
47: _extensions.add(e);
48: }
49:
50: public Iterator extensions() {
51: if (_extensions == null) {
52: return new Iterator() {
53: public boolean hasNext() {
54: return false;
55: }
56:
57: public Object next() {
58: throw new NoSuchElementException();
59: }
60:
61: public void remove() {
62: throw new UnsupportedOperationException();
63: }
64: };
65: } else {
66: return _extensions.iterator();
67: }
68: }
69:
70: public void withAllSubEntitiesDo(EntityAction action) {
71: if (_extensions != null) {
72: for (Iterator iter = _extensions.iterator(); iter.hasNext();) {
73: action.perform((Entity) iter.next());
74: }
75: }
76: }
77:
78: public void accept(ExtensionVisitor visitor) throws Exception {
79: if (_extensions != null) {
80: for (Iterator iter = _extensions.iterator(); iter.hasNext();) {
81: ((Extension) iter.next()).accept(visitor);
82: }
83: }
84: }
85:
86: private List _extensions;
87: }
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