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Java > Open Source Codes > com > caucho > es > PropertyEnumeration


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * 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  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.es;
30
31 import com.caucho.util.IntMap;
32
33 import java.util.Iterator JavaDoc;
34
35 class PropertyEnumeration implements Iterator JavaDoc {
36   IntMap completed = new IntMap();
37   ESObject object;
38   int index;
39
40   public Object JavaDoc next()
41   {
42     if (object == null)
43       return null;
44
45     if (object.propNames != null) {
46       for (; index < object.propNames.length; index++) {
47     if (object.propValues[index] != null &&
48         (object.propFlags[index] & ESObject.DONT_ENUM) == 0 &&
49         completed.get(object.propNames[index]) != 1) {
50       index++;
51       completed.put(object.propNames[index - 1], 1);
52
53       return object.propNames[index - 1];
54     }
55       }
56     }
57
58     if (object.prototype instanceof ESObject) {
59       object = (ESObject) object.prototype;
60       index = 0;
61
62       return next();
63     }
64
65     object = null;
66
67     return null;
68   }
69
70   public boolean hasNext()
71   {
72     if (object == null)
73       return false;
74
75     if (object.propNames != null) {
76       for (; index < object.propNames.length; index++) {
77     if (object.propValues[index] != null &&
78         (object.propFlags[index] & ESObject.DONT_ENUM) == 0 &&
79         completed.get(object.propNames[index]) != 1) {
80       break;
81     }
82       }
83
84       if (index < object.propNames.length)
85     return true;
86     }
87
88     if (object.prototype instanceof ESObject) {
89       object = (ESObject) object.prototype;
90       index = 0;
91
92       return hasNext();
93     }
94
95     object = null;
96
97     return false;
98   }
99
100   public void remove()
101   {
102     throw new RuntimeException JavaDoc();
103   }
104
105   PropertyEnumeration(ESObject object)
106   {
107     this.object = object;
108     index = 0;
109   }
110 }
111
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