Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
VariableTool |
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| 1.8333333333333333;1.833 |
1 | /* | |
2 | * Copyright (C) 1998-2000 Semiotek Inc. All Rights Reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted under the terms of either of the following | |
6 | * Open Source licenses: | |
7 | * | |
8 | * The GNU General Public License, version 2, or any later version, as | |
9 | * published by the Free Software Foundation | |
10 | * (http://www.fsf.org/copyleft/gpl.html); | |
11 | * | |
12 | * or | |
13 | * | |
14 | * The Semiotek Public License (http://webmacro.org/LICENSE.) | |
15 | * | |
16 | * This software is provided "as is", with NO WARRANTY, not even the | |
17 | * implied warranties of fitness to purpose, or merchantability. You | |
18 | * assume all risks and liabilities associated with its use. | |
19 | * | |
20 | * See www.webmacro.org for more information on the WebMacro project. | |
21 | */ | |
22 | ||
23 | package org.webmacro.servlet; | |
24 | ||
25 | import org.slf4j.Logger; | |
26 | import org.slf4j.LoggerFactory; | |
27 | import org.webmacro.Context; | |
28 | import org.webmacro.ContextTool; | |
29 | import org.webmacro.PropertyException; | |
30 | ||
31 | /** | |
32 | * A ContextTool which allows one to snoop information about an object | |
33 | * in the active Context. | |
34 | * | |
35 | * @author Zeljko Trogrlic | |
36 | * @author Eric B. Ridge (mailto: ebr@tcdi.com) | |
37 | */ | |
38 | ||
39 | public class VariableTool extends ContextTool | |
40 | { | |
41 | ||
42 | 2 | static Logger _log = LoggerFactory.getLogger(VariableTool.class); |
43 | Context context; | |
44 | ||
45 | public VariableTool () | |
46 | 6 | { |
47 | 6 | } |
48 | ||
49 | public VariableTool (Context newContext) | |
50 | 0 | { |
51 | 0 | context = newContext; |
52 | 0 | } |
53 | ||
54 | public Object init (Context c) throws PropertyException | |
55 | { | |
56 | 0 | return new VariableTool(c); |
57 | } | |
58 | ||
59 | /** | |
60 | * Is the specified object <code>name</code> defined in the active | |
61 | * Context? | |
62 | */ | |
63 | public boolean isDefined (Object name) | |
64 | { | |
65 | 0 | return context.containsKey(name); |
66 | } | |
67 | ||
68 | /** | |
69 | * Get the specified object <code>name</code> defined from the active | |
70 | * Context. | |
71 | */ | |
72 | public Object get (Object name) | |
73 | { | |
74 | 0 | return context.get(name); |
75 | } | |
76 | ||
77 | /** | |
78 | * Is the specified object, <code>obj</code>, an instance of the | |
79 | * specified <code>className</code>?<p> | |
80 | * | |
81 | * If either parameter is <code>null</code> this method returns false.<br> | |
82 | * If <code>className</code> cannot be found, this method returns false.<br> | |
83 | * | |
84 | * @param obj an Object from your template Context | |
85 | * @param className the <b>fully-qualified</b> class name to check | |
86 | */ | |
87 | public boolean isInstanceOf (Object obj, String className) | |
88 | { | |
89 | try | |
90 | { | |
91 | 0 | return (obj != null && className != null) |
92 | && (context.getBroker().classForName(className).isAssignableFrom( | |
93 | obj.getClass())); | |
94 | } | |
95 | 0 | catch (ClassNotFoundException cnfe) |
96 | { | |
97 | 0 | _log.error("VariableTool could not locate the class: /" |
98 | + className + "/"); | |
99 | } | |
100 | 0 | catch (Exception e) |
101 | { | |
102 | 0 | _log.error("An unexpected exception occured", e); |
103 | 0 | } |
104 | 0 | return false; |
105 | } | |
106 | } |