schema.h
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24 
25 #ifndef PXR_IMAGING_HD_SCHEMA_H
26 #define PXR_IMAGING_HD_SCHEMA_H
27 
28 #include "pxr/imaging/hd/api.h"
29 
30 #include "pxr/imaging/hd/dataSourceTypeDefs.h"
31 
32 PXR_NAMESPACE_OPEN_SCOPE
33 
34 // ----------------------------------------------------------------------------
35 
42 class HdSchema
43 {
44 public:
45  HdSchema(HdContainerDataSourceHandle container)
46  : _container(container) {}
47 
48 
50  HD_API
51  HdContainerDataSourceHandle GetContainer();
52  HD_API
53  bool IsDefined() const;
54 
57  explicit operator bool() const { return IsDefined(); }
58 
59 
60 protected:
61  HdContainerDataSourceHandle _container;
62 
67  template <typename T>
68  typename T::Handle _GetTypedDataSource(TfToken name) {
69  return _container ? T::Cast(
70  _container->Get(name)) : nullptr;
71  }
72 };
73 
74 PXR_NAMESPACE_CLOSE_SCOPE
75 
76 #endif
T::Handle _GetTypedDataSource(TfToken name)
Returns a datasource of the requested type for the given name: schema implementations can use this to...
Definition: schema.h:68
Token for efficient comparison, assignment, and hashing of known strings.
Definition: token.h:87
HD_API HdContainerDataSourceHandle GetContainer()
Returns the container data source that this schema is interpreting.
Schema classes represent a structured view of the inherently unstructured container data source passe...
Definition: schema.h:42