Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
PropertyMethod |
|
| 2.6;2.6 |
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 | ||
24 | package org.webmacro.util; | |
25 | ||
26 | import org.webmacro.Context; | |
27 | import org.webmacro.Macro; | |
28 | import org.webmacro.PropertyException; | |
29 | ||
30 | /** | |
31 | * A property method can function as part of a name in a | |
32 | * property, and represents a method call that should be used | |
33 | * to resolve that portion of the name. | |
34 | * <p> | |
35 | * For example: a.b.get("C").d is equivalent to a.b.hi.d, you can | |
36 | * also use this to access methods which are not normally available | |
37 | * through the regular introspection algorithms, for example: | |
38 | * #set $thing = a.get("thing") | |
39 | * <p> | |
40 | * The arguments supplied to a PropertyMethod can be a list | |
41 | * including Macro objects which need to be resolved | |
42 | * against a context. The introspection process will supply the | |
43 | * context and resolve these references at execution time. | |
44 | */ | |
45 | public class PropertyMethod implements Named | |
46 | { | |
47 | ||
48 | private Object _args; | |
49 | private String _name; | |
50 | private boolean _reference; | |
51 | ||
52 | /** | |
53 | * Create a new PropertyMethod | |
54 | * @param name the name of the method to call | |
55 | * @param args the arguments, including Macro objects | |
56 | */ | |
57 | public PropertyMethod (String name, Object[] args) | |
58 | 540 | { |
59 | 540 | _name = name; |
60 | 540 | _args = args; |
61 | 540 | _reference = false; |
62 | 540 | } |
63 | ||
64 | /** | |
65 | * Create a new PropertyMethod | |
66 | * @param name the name of the method to call | |
67 | * @param args the arguments, including Macro objects | |
68 | */ | |
69 | public PropertyMethod (String name, Macro args) | |
70 | 1588 | { |
71 | 1588 | _name = name; |
72 | 1588 | _args = args; |
73 | 1588 | _reference = true; |
74 | 1588 | } |
75 | ||
76 | /** | |
77 | * Return the name of this PropertyMethod | |
78 | */ | |
79 | final public String getName () | |
80 | { | |
81 | 80790 | return _name; |
82 | } | |
83 | ||
84 | /** | |
85 | * Return a signature of this method | |
86 | */ | |
87 | final public String toString () | |
88 | { | |
89 | 6 | if (_reference) |
90 | { | |
91 | 2 | return _name + _args.toString(); |
92 | } | |
93 | 4 | Object[] argList = (Object[]) _args; |
94 | 4 | StringBuffer vname = new StringBuffer(); |
95 | 4 | vname.append(_name); |
96 | 4 | vname.append("("); |
97 | 4 | for (int i = 0; i < argList.length; i++) |
98 | { | |
99 | 0 | if (i != 0) |
100 | { | |
101 | 0 | vname.append(","); |
102 | } | |
103 | 0 | vname.append(argList[i]); |
104 | } | |
105 | 4 | vname.append(")"); |
106 | 4 | return vname.toString(); |
107 | } | |
108 | ||
109 | ||
110 | /** | |
111 | * Return the arguments for this method, after resolving them | |
112 | * against the supplied context. Any arguments which are of | |
113 | * type Macro will be resolved into a regular | |
114 | * object via the Macro.evaluate method. | |
115 | * @exception PropertyException a Macro in the arguments failed to resolve against the supplied context | |
116 | */ | |
117 | final public Object[] getArguments (Context context) | |
118 | throws PropertyException | |
119 | { | |
120 | Object[] argList; | |
121 | 80790 | if (_reference) |
122 | { | |
123 | 42696 | argList = (Object[]) ((Macro) _args).evaluate(context); |
124 | } | |
125 | else | |
126 | { | |
127 | 38094 | argList = (Object[]) _args; |
128 | } | |
129 | ||
130 | 80770 | Object ret[] = new Object[argList.length]; |
131 | 80770 | System.arraycopy(argList, 0, ret, 0, argList.length); |
132 | 142918 | for (int i = 0; i < ret.length; i++) |
133 | { | |
134 | 62148 | while (ret[i] instanceof Macro) |
135 | { | |
136 | 0 | Object repl = ((Macro) ret[i]).evaluate(context); |
137 | 0 | if (repl == ret[i]) |
138 | { | |
139 | 0 | break; // avoid infinite loop |
140 | } | |
141 | 0 | ret[i] = repl; |
142 | 0 | } |
143 | } | |
144 | 80770 | return ret; |
145 | } | |
146 | ||
147 | } |