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
149
150
151
152
153
|
/**
* Copyright (C) 2009 Google Inc.
*
* Licensed 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 com.google.inject.internal;
import com.google.inject.Key;
import com.google.inject.MembersInjector;
import com.google.inject.TypeLiteral;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.inject.spi.InjectionListener;
import com.google.inject.spi.InjectionPoint;
/**
* Injects members of instances of a given type.
*
* @author jessewilson@google.com (Jesse Wilson)
*/
final class MembersInjectorImpl<T> implements MembersInjector<T> {
private final TypeLiteral<T> typeLiteral;
private final InjectorImpl injector;
private final ImmutableList<SingleMemberInjector> memberInjectors;
private final ImmutableList<MembersInjector<? super T>> userMembersInjectors;
private final ImmutableList<InjectionListener<? super T>> injectionListeners;
/*if[AOP]*/
private final ImmutableList<MethodAspect> addedAspects;
/*end[AOP]*/
MembersInjectorImpl(InjectorImpl injector, TypeLiteral<T> typeLiteral,
EncounterImpl<T> encounter, ImmutableList<SingleMemberInjector> memberInjectors) {
this.injector = injector;
this.typeLiteral = typeLiteral;
this.memberInjectors = memberInjectors;
this.userMembersInjectors = encounter.getMembersInjectors();
this.injectionListeners = encounter.getInjectionListeners();
/*if[AOP]*/
this.addedAspects = encounter.getAspects();
/*end[AOP]*/
}
public ImmutableList<SingleMemberInjector> getMemberInjectors() {
return memberInjectors;
}
public void injectMembers(T instance) {
Errors errors = new Errors(typeLiteral);
try {
injectAndNotify(instance, errors, null, typeLiteral, false);
} catch (ErrorsException e) {
errors.merge(e.getErrors());
}
errors.throwProvisionExceptionIfErrorsExist();
}
void injectAndNotify(final T instance, final Errors errors,
final Key<T> key, final Object source, final boolean toolableOnly)
throws ErrorsException {
if (instance == null) {
return;
}
injector.callInContext(new ContextualCallable<Void>() {
public Void call(InternalContext context) throws ErrorsException {
context.pushState(key, source);
try {
injectMembers(instance, errors, context, toolableOnly);
} finally {
context.popState();
}
return null;
}
});
// TODO: We *could* notify listeners too here,
// but it's not clear if we want to. There's no way to know
// if a MembersInjector from the usersMemberInjector list wants
// toolable injections, so do we really want to notify
// about injection? (We could take a strategy of only notifying
// if atleast one InjectionPoint was toolable, in which case
// the above callInContext could return 'true' if it injected
// anything.)
if(!toolableOnly) {
notifyListeners(instance, errors);
}
}
void notifyListeners(T instance, Errors errors) throws ErrorsException {
int numErrorsBefore = errors.size();
for (InjectionListener<? super T> injectionListener : injectionListeners) {
try {
injectionListener.afterInjection(instance);
} catch (RuntimeException e) {
errors.errorNotifyingInjectionListener(injectionListener, typeLiteral, e);
}
}
errors.throwIfNewErrors(numErrorsBefore);
}
void injectMembers(T t, Errors errors, InternalContext context, boolean toolableOnly) {
// optimization: use manual for/each to save allocating an iterator here
for (int i = 0, size = memberInjectors.size(); i < size; i++) {
SingleMemberInjector injector = memberInjectors.get(i);
if(!toolableOnly || injector.getInjectionPoint().isToolable()) {
injector.inject(errors, context, t);
}
}
// TODO: There's no way to know if a user's MembersInjector wants toolable injections.
if(!toolableOnly) {
// optimization: use manual for/each to save allocating an iterator here
for (int i = 0, size = userMembersInjectors.size(); i < size; i++) {
MembersInjector<? super T> userMembersInjector = userMembersInjectors.get(i);
try {
userMembersInjector.injectMembers(t);
} catch (RuntimeException e) {
errors.errorInUserInjector(userMembersInjector, typeLiteral, e);
}
}
}
}
@Override public String toString() {
return "MembersInjector<" + typeLiteral + ">";
}
public ImmutableSet<InjectionPoint> getInjectionPoints() {
ImmutableSet.Builder<InjectionPoint> builder = ImmutableSet.builder();
for (SingleMemberInjector memberInjector : memberInjectors) {
builder.add(memberInjector.getInjectionPoint());
}
return builder.build();
}
/*if[AOP]*/
public ImmutableList<MethodAspect> getAddedAspects() {
return addedAspects;
}
/*end[AOP]*/
}
|
