Sauce-0.10.1 A C++ Dependency Injection Framework

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binding.h
1 #ifndef SAUCE_INTERNAL_BINDING_H_
2 #define SAUCE_INTERNAL_BINDING_H_
3
4 #include <cassert>
5 #include <string>
6
7 #include <sauce/injector.h>
8 #include <sauce/memory.h>
9 #include <sauce/named.h>
10 #include <sauce/internal/key.h>
11 #include <sauce/internal/opaque_binding.h>
12 #include <sauce/internal/resolved_binding.h>
13 #include <sauce/internal/type_id.h>
14
15 namespace sauce {
16 namespace internal {
17
21 template<typename Dependency_, typename Scope>
22 class Binding: public ResolvedBinding<Dependency_>, public InjectorFriend {
23 public:
24
25 typedef typename Key<Dependency_>::Normalized Dependency;
26 typedef typename Key<Dependency>::Ptr IfacePtr;
27 typedef typename ResolvedBinding<Dependency>::BindingPtr BindingPtr;
28
29 private:
30
31 std::string name;
32
36 TypeId getScopeKey() const {
37 return typeIdOf<Scope>();
38 }
39
45 virtual void inject(IfacePtr &, BindingPtr, InjectorPtr) const = 0;
46
58 void get(IfacePtr & injected, BindingPtr binding, InjectorPtr injector) const {
59 bool unscoped = (getScopeKey() == typeIdOf<NoScope>()) || this->isModifier();
60
61 if (unscoped || !probe<Dependency>(injector, injected, getScopeKey())) {
62 // injected is not null if and only if we are a modifier.
63 assert((injected.get() != NULL) == this->isModifier());
64
65 inject(injected, binding, injector);
66 if (!unscoped) {
67 cache<Dependency>(injector, injected, getScopeKey());
68 }
69 }
70 }
71
78 void eagerlyInject(OpaqueBindingPtr opaque, InjectorPtr injector) const {
79 if (getScopeKey() != typeIdOf<NoScope>()) {
80 BindingPtr binding = resolve<Dependency>(opaque);
81 TypeIds ids;
82 this->validateAcyclic(injector, ids);
83 IfacePtr injected;
84 get(injected, binding, injector);
85 }
86 }
87
91 virtual void setDynamicDependencyNames(std::vector<std::string> const &) {}
92
93 public:
94
95 Binding():
96 name(unnamed()) {}
97
98 virtual ~Binding() {}
99
103 std::string getName() const {
104 return name;
105 }
106
110 void setName(std::string const name) {
111 this->name = name;
112 }
113
114 };
115
116 }
117
118 namespace i = ::sauce::internal;
119
120 }
121
122 #endif // SAUCE_INTERNAL_BINDING_H_
sauce::internal::Binding::setName
void setName(std::string const name)
Set the dynamic name of this binding.
Definition: binding.h:110
sauce::internal::ResolvedBinding
A binding for an acknowledged interface.
Definition: resolved_binding.h:20
sauce::internal
Definition: binder.h:317
sauce::internal::InjectorFriend
Definition: injector.h:196
sauce::Named
Wrap dependency requests with Named to choose one of several (statically) named alternatives.
Definition: named.h:12
sauce::internal::Binding::getName
std::string getName() const
The dynamic name of this binding.
Definition: binding.h:103
sauce::internal::ResolvedBinding< Dependency_ >::validateAcyclic
virtual void validateAcyclic(sauce::shared_ptr< Injector >, TypeIds &) const =0
Establish that further dependencies do not introduce cycles with ones already accumulated.
sauce::internal::TypeId
A TypeSignature equipped with specific helper methods dealing in the hidden type. ...
Definition: type_id.h:34
sauce::internal::Binding
The base class of all actual binding implementations.
Definition: binding.h:22
sauce
Definition: binder.h:21
sauce::internal::Key
A complete specification of a dependency request.
Definition: key.h:15
sauce::internal::OpaqueBinding::isModifier
virtual bool isModifier() const
Does this binding modify an existing value?
Definition: opaque_binding.h:58