1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.qpid.server.model;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import org.apache.log4j.Logger;
public class ConfiguredAutomatedAttribute<C extends ConfiguredObject, T> extends ConfiguredObjectAttribute<C,T>
{
private static final Logger LOGGER = Logger.getLogger(ConfiguredAutomatedAttribute.class);
private final ManagedAttribute _annotation;
private final Method _validValuesMethod;
ConfiguredAutomatedAttribute(final Class<C> clazz,
final Method getter,
final ManagedAttribute annotation)
{
super(clazz, getter);
_annotation = annotation;
Method validValuesMethod = null;
if(_annotation.validValues().length == 1)
{
String validValue = _annotation.validValues()[0];
validValuesMethod = getValidValuesMethod(validValue, clazz);
}
_validValuesMethod = validValuesMethod;
}
private Method getValidValuesMethod(final String validValue, final Class<C> clazz)
{
if(validValue.matches("([\\w][\\w\\d_]+\\.)+[\\w][\\w\\d_\\$]*#[\\w\\d_]+\\s*\\(\\s*\\)"))
{
String function = validValue;
try
{
String className = function.split("#")[0].trim();
String methodName = function.split("#")[1].split("\\(")[0].trim();
Class<?> validValueCalculatingClass = Class.forName(className);
Method method = validValueCalculatingClass.getMethod(methodName);
if (Modifier.isStatic(method.getModifiers()) && Modifier.isPublic(method.getModifiers()))
{
if (Collection.class.isAssignableFrom(method.getReturnType()))
{
if (method.getGenericReturnType() instanceof ParameterizedType)
{
Type parameterizedType =
((ParameterizedType) method.getGenericReturnType()).getActualTypeArguments()[0];
if (parameterizedType == String.class)
{
return method;
}
}
}
}
}
catch (ClassNotFoundException | NoSuchMethodException e)
{
LOGGER.warn("The validValues of the " + getName() + " attribute in class " + clazz.getSimpleName()
+ " has value '" + validValue + "' which looks like it should be a method,"
+ " but no such method could be used.", e );
}
}
return null;
}
public boolean isAutomated()
{
return true;
}
public boolean isDerived()
{
return false;
}
public String defaultValue()
{
return _annotation.defaultValue();
}
public boolean isSecure()
{
return _annotation.secure();
}
public boolean isMandatory()
{
return _annotation.mandatory();
}
public boolean isPersisted()
{
return _annotation.persist();
}
public String getDescription()
{
return _annotation.description();
}
public Collection<String> validValues()
{
if(_validValuesMethod != null)
{
try
{
return (Collection<String>) _validValuesMethod.invoke(null);
}
catch (InvocationTargetException | IllegalAccessException e)
{
LOGGER.warn("Could not execute the validValues generation method " + _validValuesMethod.getName(), e);
return Collections.emptySet();
}
}
return Arrays.asList(_annotation.validValues());
}
}
|
