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1
9 package org.jboss.portal.core.util;
10
11 import java.lang.reflect.Method  ;
12 import java.text.MessageFormat ;
13 import java.util.ArrayList ;
14 import java.util.HashSet ;
15 import java.util.List ;
16 import java.util.Set ;
17
18
22 public class ProxyValidator
23 {
24
25 private static final Set acceptedClasses = new HashSet ();
26 static
27 {
28 acceptedClasses.add(String .class);
29 acceptedClasses.add(int.class);
30 acceptedClasses.add(boolean.class);
31 acceptedClasses.add(String [].class);
32 acceptedClasses.add(int[].class);
33 acceptedClasses.add(boolean[].class);
34 }
35
36 public static final int METHOD_NOT_ACCESSOR = 0;
37
38 public static final int GETTER_INVALID_NAME = 1;
39 public static final int GETTER_DUPLICATE_NAME = 2;
40 public static final int GETTER_INVALID_RETURN_TYPE = 3;
41 public static final int GETTER_NO_ARGUMENT = 4;
42 public static final int GETTER_TOO_MANY_ARGUMENTS = 5;
43 public static final int GETTER_RETURN_TYPE_DOES_NOT_MATCH_ARGUMENT_TYPE = 6;
44
45 public static final int SETTER_DUPLICATE_NAME = 7;
46 public static final int SETTER_INVALID_NAME = 8;
47 public static final int SETTER_NO_ARGUMENT = 9;
48 public static final int SETTER_TOO_MANY_ARGUMENTS = 10;
49 public static final int SETTER_RETURN_TYPE_IS_NOT_VOID =11;
50 public static final int SETTER_INVALID_ARGUMENT_TYPE = 12;
51
52 private static final String [] DESCRIPTIONS =
55 {
56 "Method {0} is not an accessor",
57 "Name {1} is not valid",
58 "Name {1} is duplicated",
59 "Method {0} has an invalid return type",
60 "Method {0} has no argument",
61 "Method {0} has too many arguments",
62 "Method {0} does not have a return type matching the argument type",
63 "Name {1} is duplicated",
64 "Name {1} is not valid",
65 "Method {0} has no argument",
66 "Method {0} has too many arguments",
67 "Method {0} has return type which is not void",
68 "Method {0} has an invalid argument type",
69 };
70
71 public static class Error
72 {
73 private int code;
74 private Method method;
75 private String desc;
76 public Error(int code, Method method)
77 {
78 this.code = code;
79 this.method = method;
80 desc = MessageFormat.format(DESCRIPTIONS[code], new Object []{method, method.getName()});
81 }
82 public int getCode()
83 {
84 return code;
85 }
86 public Method getMethod()
87 {
88 return method;
89 }
90 public String getDescription()
91 {
92 return desc;
93 }
94
95 public String toString()
96 {
97 return desc;
98 }
99 }
100
101 public static Error [] validate(Class itf)
102 {
103 List errors = new ArrayList ();
104 Method [] methods = itf.getMethods();
105 Set getters = new HashSet ();
106 Set setters = new HashSet ();
107 for (int i = 0;i < methods.length;i++)
108 {
109 Method method = methods[i];
110 String methodName = method.getName();
111 if (methodName.startsWith("get"))
112 {
113 if (methodName.substring(3).length() == 0)
115 {
116 errors.add(new Error (GETTER_INVALID_NAME, method));
117 }
118 if (getters.contains(methodName.substring(3)))
119 {
120 errors.add(new Error (GETTER_DUPLICATE_NAME, method));
121 }
122 if (!acceptedClasses.contains(method.getReturnType()))
123 {
124 errors.add(new Error (GETTER_INVALID_RETURN_TYPE, method));
125 }
126 if (method.getParameterTypes().length == 0)
127 {
128 errors.add(new Error (GETTER_NO_ARGUMENT, method));
129 }
130 else if (method.getParameterTypes().length > 1)
131 {
132 errors.add(new Error (GETTER_TOO_MANY_ARGUMENTS, method));
133 }
134 else if (!method.getReturnType().equals(method.getParameterTypes()[0]))
135 {
136 errors.add(new Error (GETTER_RETURN_TYPE_DOES_NOT_MATCH_ARGUMENT_TYPE, method));
137 }
138 getters.add(methodName.substring(3));
139 }
140 else if (methodName.startsWith("set"))
141 {
142 if (method.getParameterTypes().length == 0)
143 {
144 errors.add(new Error (SETTER_NO_ARGUMENT, method));
145 }
146 else if (method.getParameterTypes().length > 1)
147 {
148 errors.add(new Error (SETTER_TOO_MANY_ARGUMENTS, method));
149 }
150 else if (!acceptedClasses.contains(method.getParameterTypes()[0]))
151 {
152 errors.add(new Error (SETTER_INVALID_ARGUMENT_TYPE, method));
153 }
154 if (methodName.substring(3).length() == 0)
155 {
156 errors.add(new Error (SETTER_INVALID_NAME, method));
157 }
158 if (setters.contains(methodName.substring(3)))
159 {
160 errors.add(new Error (SETTER_DUPLICATE_NAME, method));
161 }
162 if (!method.getReturnType().equals(void.class))
163 {
164 errors.add(new Error (SETTER_RETURN_TYPE_IS_NOT_VOID, method));
165 }
166 setters.add(methodName.substring(3));
167 }
168 else
169 {
170 errors.add(new Error (METHOD_NOT_ACCESSOR, method));
172 }
173 }
174
175 return (Error [])errors.toArray(new Error [errors.size()]);
176 }
177 }
178 |
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