references.h

//
// Copyright 2016 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
//    names, trademarks, service marks, or product names of the Licensor
//    and its affiliates, except as required to comply with Section 4(c) of
//    the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#ifndef PXR_USD_USD_REFERENCES_H
#define PXR_USD_USD_REFERENCES_H

#include "pxr/pxr.h"
#include "pxr/usd/usd/api.h"
#include "pxr/usd/usd/common.h"
#include "pxr/usd/usd/prim.h"

#include "pxr/usd/sdf/declareHandles.h"
#include "pxr/usd/sdf/path.h"
#include "pxr/usd/sdf/reference.h"

PXR_NAMESPACE_OPEN_SCOPE

class UsdReferences {
    friend class UsdPrim;

    explicit UsdReferences(const UsdPrim& prim) : _prim(prim) {}

public:
    USD_API
    bool AddReference(const SdfReference& ref,
                  UsdListPosition position=UsdListPositionBackOfPrependList);

    USD_API
    bool AddReference(const std::string &identifier,
                  const SdfPath &primPath,
                  const SdfLayerOffset &layerOffset = SdfLayerOffset(),
                  UsdListPosition position=UsdListPositionBackOfPrependList);

    USD_API
    bool AddReference(const std::string &identifier,
                  const SdfLayerOffset &layerOffset = SdfLayerOffset(),
                  UsdListPosition position=UsdListPositionBackOfPrependList);

    USD_API
    bool AddInternalReference(const SdfPath &primPath,
                  const SdfLayerOffset &layerOffset = SdfLayerOffset(),
                  UsdListPosition position=UsdListPositionBackOfPrependList);

    USD_API
    bool RemoveReference(const SdfReference& ref);

    USD_API
    bool ClearReferences();

    USD_API
    bool SetReferences(const SdfReferenceVector& items);

    const UsdPrim &GetPrim() const { return _prim; }

    UsdPrim GetPrim() { return _prim; }

    explicit operator bool() { return bool(_prim); }

private:
    UsdPrim _prim;
};

PXR_NAMESPACE_CLOSE_SCOPE

#endif // PXR_USD_USD_REFERENCES_H