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spec.h
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1//
2// Copyright 2016 Pixar
3//
4// Licensed under the terms set forth in the LICENSE.txt file available at
5// https://openusd.org/license.
6//
7#ifndef PXR_USD_SDF_SPEC_H
8#define PXR_USD_SDF_SPEC_H
9
11
12#include "pxr/pxr.h"
13#include "pxr/usd/sdf/api.h"
14#include "pxr/usd/sdf/abstractData.h"
15#include "pxr/usd/sdf/identity.h"
16#include "pxr/usd/sdf/declareSpec.h"
17#include "pxr/usd/sdf/schema.h"
18#include "pxr/usd/sdf/types.h"
19#include "pxr/base/vt/value.h"
20#include "pxr/base/tf/hash.h"
21#include "pxr/base/tf/token.h"
22#include "pxr/base/tf/type.h"
23
24#include <iosfwd>
25
26PXR_NAMESPACE_OPEN_SCOPE
27
32class SdfSpec
33{
34 SDF_DECLARE_BASE_SPEC(SdfSpec);
35
36public:
37 SDF_API
38 SdfSpec &operator=(const SdfSpec &other);
39
40 SDF_API
41 ~SdfSpec();
42
46
48 SDF_API
49 const SdfSchemaBase& GetSchema() const;
50
53 SDF_API
55
57 SDF_API
58 bool IsDormant() const;
59
61 SDF_API
62 SdfLayerHandle GetLayer() const;
63
65 SDF_API
67
69 SDF_API
70 bool PermissionToEdit() const;
71
74 SDF_API
75 std::vector<TfToken> ListInfoKeys() const;
76
85 SDF_API
86 std::vector<TfToken> GetMetaDataInfoKeys() const;
87
90 SDF_API
92
97 SDF_API
98 VtValue GetInfo(const TfToken &key) const;
99
107 SDF_API
108 void SetInfo(const TfToken &key, const VtValue &value);
109
112 SDF_API
113 void SetInfoDictionaryValue(const TfToken &dictionaryKey,
114 const TfToken &entryKey, const VtValue &value);
115
132 SDF_API
133 bool HasInfo(const TfToken &key) const;
134
143 SDF_API
144 void ClearInfo(const TfToken &key);
145
147 SDF_API
148 TfType GetTypeForInfo(const TfToken &key) const;
149
151 SDF_API
152 const VtValue& GetFallbackForInfo(const TfToken &key) const;
153
155 SDF_API
156 bool WriteToStream(std::ostream&, size_t indent = 0) const;
157
166 SDF_API
167 bool IsInert(bool ignoreChildren = false) const;
168
170
173
175 SDF_API
176 std::vector<TfToken> ListFields() const;
177
180 SDF_API
181 bool HasField(const TfToken &name) const;
182
186 template <class T>
187 bool HasField(const TfToken &name, T* value) const
188 {
189 if (!value) {
190 return HasField(name);
191 }
192
193 SdfAbstractDataTypedValue<T> outValue(value);
194 return _HasField(name, &outValue);
195 }
196
198 SDF_API
199 VtValue GetField(const TfToken &name) const;
200
204 template <typename T>
205 T GetFieldAs(const TfToken & name, const T& defaultValue = T()) const
206 {
207 VtValue v = GetField(name);
208 if (v.IsEmpty() || !v.IsHolding<T>())
209 return defaultValue;
210 return v.UncheckedGet<T>();
211 }
212
214 SDF_API
215 bool SetField(const TfToken & name, const VtValue& value);
216
218 template <typename T>
219 bool SetField(const TfToken & name, const T& value)
220 {
221 return SetField(name, VtValue(value));
222 }
223
225 SDF_API
226 bool ClearField(const TfToken & name);
227
229
232
233 SDF_API bool operator==(const SdfSpec& rhs) const;
234 SDF_API bool operator<(const SdfSpec& rhs) const;
235
237
239 template <class HashState>
240 friend void TfHashAppend(HashState &h, const SdfSpec& x);
241
242private:
243 SDF_API
244 bool _HasField(const TfToken& name, SdfAbstractDataValue* value) const;
245
246protected:
247 bool _MoveSpec(const SdfPath &oldPath, const SdfPath &newPath) const;
248 bool _DeleteSpec(const SdfPath &path);
249
250private:
252};
253
254template <class HashState>
255void TfHashAppend(HashState &h, const SdfSpec& x) {
256 h.Append(x._id.get());
257}
258
259inline size_t hash_value(const SdfSpec &x) {
260 return TfHash()(x);
261}
262
263PXR_NAMESPACE_CLOSE_SCOPE
264
265#endif // PXR_USD_SDF_SPEC_H
The fully-typed container for a field value in an SdfAbstractData.
Definition: abstractData.h:458
A type-erased container for a field value in an SdfAbstractData.
Definition: abstractData.h:399
A path value used to locate objects in layers or scenegraphs.
Definition: path.h:274
Generic class that provides information about scene description fields but doesn't actually provide a...
Definition: schema.h:45
Base class for all Sdf spec classes.
Definition: spec.h:33
T GetFieldAs(const TfToken &name, const T &defaultValue=T()) const
Returns a field value by name.
Definition: spec.h:205
SDF_API bool HasField(const TfToken &name) const
Returns true if the spec has a non-empty value with field name name.
SDF_API bool IsDormant() const
Returns true if this object is invalid or expired.
friend void TfHashAppend(HashState &h, const SdfSpec &x)
Hash.
Definition: spec.h:255
SDF_API bool IsInert(bool ignoreChildren=false) const
Returns whether this object has no significant data.
SDF_API const VtValue & GetFallbackForInfo(const TfToken &key) const
Returns the fallback for the info with the given key.
SDF_API VtValue GetField(const TfToken &name) const
Returns a field value by name.
SDF_API const SdfSchemaBase & GetSchema() const
Returns the SdfSchemaBase for the layer that owns this spec.
SDF_API std::vector< TfToken > ListFields() const
Returns all fields with values.
SDF_API bool WriteToStream(std::ostream &, size_t indent=0) const
Writes this spec to the given stream.
bool SetField(const TfToken &name, const T &value)
Sets a field value of type T.
Definition: spec.h:219
SDF_API SdfLayerHandle GetLayer() const
Returns the layer that this object belongs to.
bool HasField(const TfToken &name, T *value) const
Returns true if the object has a non-empty value with name name and type T.
Definition: spec.h:187
SDF_API bool ClearField(const TfToken &name)
Clears a field.
SDF_API TfToken GetMetaDataDisplayGroup(TfToken const &key) const
Returns this metadata key's displayGroup.
SDF_API std::vector< TfToken > GetMetaDataInfoKeys() const
Returns the list of metadata info keys for this object.
SDF_API SdfPath GetPath() const
Returns the scene path of this object.
SDF_API bool SetField(const TfToken &name, const VtValue &value)
Sets a field value as a boxed VtValue.
SDF_API SdfSpecType GetSpecType() const
Returns the SdfSpecType specifying the spec type this object represents.
SDF_API VtValue GetInfo(const TfToken &key) const
Gets the value for the given metadata key.
SDF_API TfType GetTypeForInfo(const TfToken &key) const
Returns the data type for the info with the given key.
SDF_API bool PermissionToEdit() const
Returns whether this object's layer can be edited.
SDF_API void SetInfoDictionaryValue(const TfToken &dictionaryKey, const TfToken &entryKey, const VtValue &value)
Sets the value for entryKey to value within the dictionary with the given metadata key dictionaryKey.
SDF_API std::vector< TfToken > ListInfoKeys() const
Returns the full list of info keys currently set on this object.
SDF_API void SetInfo(const TfToken &key, const VtValue &value)
Sets the value for the given metadata key.
SDF_API void ClearInfo(const TfToken &key)
Clears the value for scene spec info with the given key.
SDF_API bool HasInfo(const TfToken &key) const
Returns whether there is a setting for the scene spec info with the given key.
A user-extensible hashing mechanism for use with runtime hash tables.
Definition: hash.h:460
Token for efficient comparison, assignment, and hashing of known strings.
Definition: token.h:71
TfType represents a dynamic runtime type.
Definition: type.h:48
Provides a container which may hold any type, and provides introspection and iteration over array typ...
Definition: value.h:147
bool IsEmpty() const
Returns true iff this value is empty.
Definition: value.h:1285
bool IsHolding() const
Return true if this value is holding an object of type T, false otherwise.
Definition: value.h:1064
T const & UncheckedGet() const &
Returns a const reference to the held object if the held object is of type T.
Definition: value.h:1104
TfToken class for efficient string referencing and hashing, plus conversions to and from stl string c...
Basic Sdf data types.
SdfSpecType
An enum that specifies the type of an object.
Definition: types.h:68