parserPlugin.h

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//
// Copyright 2018 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
 
#ifndef PXR_USD_NDR_PARSER_PLUGIN_H
#define PXR_USD_NDR_PARSER_PLUGIN_H
 
 
#include "pxr/pxr.h"
#include "pxr/usd/ndr/api.h"
#include "pxr/base/tf/type.h"
#include "pxr/base/tf/weakBase.h"
#include "pxr/base/tf/weakPtr.h"
#include "pxr/usd/ndr/declare.h"
 
PXR_NAMESPACE_OPEN_SCOPE
 
// Forward declarations
struct NdrNodeDiscoveryResult;
 
#define NDR_REGISTER_PARSER_PLUGIN(ParserPluginClass)                   \
TF_REGISTRY_FUNCTION(TfType)                                            \
{                                                                       \
    TfType::Define<ParserPluginClass, TfType::Bases<NdrParserPlugin>>() \
        .SetFactory<NdrParserPluginFactory<ParserPluginClass>>();       \
}
 
class NdrParserPlugin : public TfWeakBase
{
public:
    NDR_API
    NdrParserPlugin();
    NDR_API
    virtual ~NdrParserPlugin();
 
    NDR_API
    virtual NdrNodeUniquePtr Parse(
        const NdrNodeDiscoveryResult& discoveryResult) = 0;
 
    NDR_API
    virtual const NdrTokenVec& GetDiscoveryTypes() const = 0;
 
    NDR_API
    virtual const TfToken& GetSourceType() const = 0;
 
    NDR_API
    static NdrNodeUniquePtr GetInvalidNode(const NdrNodeDiscoveryResult& dr);
};
 
 
class NdrParserPluginFactoryBase : public TfType::FactoryBase
{
public:
    virtual NdrParserPlugin* New() const = 0;
};
 
template <class T>
class NdrParserPluginFactory : public NdrParserPluginFactoryBase
{
public:
    virtual NdrParserPlugin* New() const
    {
        return new T;
    }
};
 
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif // PXR_USD_NDR_PARSER_PLUGIN_H