Sauce-0.10.1
A C++ Dependency Injection Framework
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
15namespace sauce {
16namespace internal {
17
21template<typename Dependency_, typename Scope>
22class Binding: public ResolvedBinding<Dependency_>, public InjectorFriend {
23public:
24
26 typedef typename Key<Dependency>::Ptr IfacePtr;
27 typedef typename ResolvedBinding<Dependency>::BindingPtr BindingPtr;
28
29private:
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
93public:
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
118namespace i = ::sauce::internal;
119
120}
121
122#endif // SAUCE_INTERNAL_BINDING_H_
Wrap dependency requests with Named to choose one of several (statically) named alternatives.
Definition: named.h:12
The base class of all actual binding implementations.
Definition: binding.h:22
void setName(std::string const name)
Set the dynamic name of this binding.
Definition: binding.h:110
std::string getName() const
The dynamic name of this binding.
Definition: binding.h:103
Definition: injector.h:196
A complete specification of a dependency request.
Definition: key.h:15
virtual bool isModifier() const
Does this binding modify an existing value?
Definition: opaque_binding.h:58
A binding for an acknowledged interface.
Definition: resolved_binding.h:20
virtual void validateAcyclic(sauce::shared_ptr< Injector >, TypeIds &) const=0
Establish that further dependencies do not introduce cycles with ones already accumulated.
A TypeSignature equipped with specific helper methods dealing in the hidden type.
Definition: type_id.h:34