01: /*
02: * Copyright (c) 1998-2007 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: *
23: * Free Software Foundation, Inc.
24: * 59 Temple Place, Suite 330
25: * Boston, MA 02111-1307 USA
26: *
27: * @author Sam
28: */
29:
30: package com.caucho.quercus.lib.spl;
31:
32: import com.caucho.quercus.env.TraversableDelegate;
33: import com.caucho.quercus.env.Env;
34: import com.caucho.quercus.env.ObjectValue;
35: import com.caucho.quercus.env.StringBuilderValue;
36: import com.caucho.quercus.env.Value;
37:
38: import java.util.Iterator;
39: import java.util.Map;
40:
41: /**
42: * A delegate that intercepts requests for iterator's and delegates
43: * them to the iteerator returned by {@link IteratorAggregate@getIterator()}
44: */
45: public class IteratorAggregateDelegate implements TraversableDelegate {
46: private static final StringBuilderValue GET_ITERATOR = new StringBuilderValue(
47: "getIterator");
48:
49: private final IteratorDelegate _iteratorDelegate = new IteratorDelegate();
50:
51: public Iterator<Map.Entry<Value, Value>> getIterator(Env env,
52: ObjectValue qThis) {
53: return _iteratorDelegate
54: .getIterator(env, getTarget(env, qThis));
55: }
56:
57: public Iterator<Value> getKeyIterator(Env env, ObjectValue qThis) {
58: return _iteratorDelegate.getKeyIterator(env, getTarget(env,
59: qThis));
60: }
61:
62: public Iterator<Value> getValueIterator(Env env, ObjectValue qThis) {
63: return _iteratorDelegate.getValueIterator(env, getTarget(env,
64: qThis));
65: }
66:
67: private ObjectValue getTarget(Env env, ObjectValue qThis) {
68: Value iter = qThis.callMethod(env, GET_ITERATOR);
69:
70: return (ObjectValue) iter;
71: }
72: }
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