~popey/+junk/usd

//

// 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.

//

#include "usdMaya/primWriterRegistry.h"

#include "usdMaya/debugCodes.h"

#include "usdMaya/registryHelper.h"

#include "pxr/base/tf/staticTokens.h"

#include "pxr/base/tf/stl.h"

#include <boost/assign.hpp>

TF_DEFINE_PRIVATE_TOKENS(_tokens,

    (UsdMaya)

        (PrimWriter)

);

typedef std::map<std::string, PxrUsdMayaPrimWriterRegistry::WriterFn> _Registry;

static _Registry _reg;

/* static */

void 

PxrUsdMayaPrimWriterRegistry::Register(

        const std::string& mayaTypeName,

        PxrUsdMayaPrimWriterRegistry::WriterFn fn)

{

    TF_DEBUG(PXRUSDMAYA_REGISTRY).Msg(

            "Registering UsdMayaPrimWriter for maya type %s.\n", mayaTypeName.c_str());

    std::pair< _Registry::iterator, bool> insertStatus = 

        _reg.insert(std::make_pair(mayaTypeName, fn));

    if (not insertStatus.second) {

        TF_CODING_ERROR("Multiple writer for type %s", mayaTypeName.c_str());

        insertStatus.first->second = fn;

    }

}

/* static */

PxrUsdMayaPrimWriterRegistry::WriterFn

PxrUsdMayaPrimWriterRegistry::Find(

        const std::string& mayaTypeName)

{

    TfRegistryManager::GetInstance().SubscribeTo<PxrUsdMayaPrimWriterRegistry>();

    // unfortunately, usdTypeName is diff from the tfTypeName which we use to

    // register.  do the conversion here.

    WriterFn ret = NULL;

    if (TfMapLookup(_reg, mayaTypeName, &ret)) {

        return ret;

    }

    static std::vector<TfToken> SCOPE = boost::assign::list_of

        (_tokens->UsdMaya)(_tokens->PrimWriter);

    PxrUsdMaya_RegistryHelper::FindAndLoadMayaPlug(SCOPE, mayaTypeName);

    // ideally something just registered itself.  if not, we at least put it in

    // the registry in case we encounter it again.

    if (not TfMapLookup(_reg, mayaTypeName, &ret)) {

        TF_DEBUG(PXRUSDMAYA_REGISTRY).Msg(

                "No usdMaya writer plugin for maya type %s.  No maya plugin found.\n", 

                mayaTypeName.c_str());

        _reg[mayaTypeName] = NULL;

    }

    return ret;

}