static std::vector<std::pair<std::string, std::string>> resolvePorts(
const Poco::JSON::Object::Ptr &topObj,
const std::string &blockId,
const std::string &portName,
const bool resolveSrc
)
{
assert(topObj);
std::vector<std::pair<std::string, std::string>> results;
const auto blocksObj = topObj->getObject("blocks");
assert(blocksObj);
if (not blocksObj->has(blockId)) return results;
const auto blockObj = blocksObj->getObject(blockId);
assert(blockObj);
if (not blockIsHier(blockObj))
{
results.push_back(std::make_pair(blockId, portName));
return results;
}
const auto connsArray = blockObj->getArray("connections");
for (size_t c_i = 0; c_i < connsArray->size(); c_i++)
{
const auto subConnObj = connsArray->getObject(c_i);
assert(subConnObj);
std::string subId, subName;
if (resolveSrc)
{
if (subConnObj->getValue<std::string>("dstId") != blockId) continue;
if (subConnObj->getValue<std::string>("dstName") != portName) continue;
subId = subConnObj->getValue<std::string>("srcId");
subName = subConnObj->getValue<std::string>("srcName");
}
else
{
if (subConnObj->getValue<std::string>("srcId") != blockId) continue;
if (subConnObj->getValue<std::string>("srcName") != portName) continue;
subId = subConnObj->getValue<std::string>("dstId");
subName = subConnObj->getValue<std::string>("dstName");
}
//ignore pass-through connections in this loop
if (subId != blockId) results.push_back(std::make_pair(subId, subName));
}
return results;
}
static Poco::JSON::Array::Ptr getConnectedPortInfos(
const Poco::JSON::Object::Ptr &topObj,
const std::string &blockId,
const bool enbFilter,
const bool isInput)
{
const auto connsArray = topObj->getArray("connections");
const auto blocksObj = topObj->getObject("blocks");
const auto blockObj = blocksObj->getObject(blockId);
//grab the raw ports info
Poco::JSON::Array::Ptr portsInfo(new Poco::JSON::Array());
if (isInput and blockObj->has("inputs")) portsInfo = blockObj->getArray("inputs");
if (not isInput and blockObj->has("outputs")) portsInfo = blockObj->getArray("outputs");
//no filtering? return ASAP
if (not enbFilter) return portsInfo;
Poco::JSON::Array::Ptr filteredPortsInfo(new Poco::JSON::Array());
for (size_t i = 0; i < portsInfo->size(); i++)
{
const auto portInfo = portsInfo->getObject(i);
for (size_t c_i = 0; c_i < connsArray->size(); c_i++)
{
const auto conn = connsArray->getObject(c_i);
if (
(not isInput and blockId == conn->getValue<std::string>("srcId") and portInfo->getValue<std::string>("name") == conn->getValue<std::string>("srcName")) or
(isInput and blockId == conn->getValue<std::string>("dstId") and portInfo->getValue<std::string>("name") == conn->getValue<std::string>("dstName"))
)
{
filteredPortsInfo->add(portInfo);
break;
}
}
}
return filteredPortsInfo;
}
static bool flattenDump(Poco::JSON::Object::Ptr &topObj)
{
assert(topObj);
bool hierFound = false;
//create new blocks object that flattens any hierarchy to 1 depth
//if this block is a hierarchy -- bring its blocks to the top level
const auto blocksObj = topObj->getObject("blocks");
assert(blocksObj);
Poco::JSON::Object::Ptr flatBlocksObj(new Poco::JSON::Object());
std::vector<std::string> blockUids; blocksObj->getNames(blockUids);
for (const auto &uid : blockUids)
{
const auto blockObj = blocksObj->getObject(uid);
assert(blockObj);
if (blockIsHier(blockObj))
{
hierFound = true;
const auto subBlocksObj = blockObj->getObject("blocks");
assert(subBlocksObj);
const auto thisName = blockObj->getValue<std::string>("name");
std::vector<std::string> subBlockUids; subBlocksObj->getNames(subBlockUids);
for (const auto &subUid : subBlockUids)
{
auto subBlockObj = subBlocksObj->getObject(subUid);
assert(subBlockObj);
const auto subName = subBlockObj->getValue<std::string>("name");
subBlockObj->set("name", thisName+"/"+subName); //heritage name
flatBlocksObj->set(subUid, subBlockObj);
}
}
else flatBlocksObj->set(uid, blockObj);
}
//create new connections array folding out depth 1 hierarchies
const auto connsArray = topObj->getArray("connections");
assert(connsArray);
Poco::JSON::Array::Ptr flatConnsArray(new Poco::JSON::Array());
for (size_t c_i = 0; c_i < connsArray->size(); c_i++)
{
const auto connObj = connsArray->getObject(c_i);
assert(connObj);
for (const auto & resolvedSrc : resolvePorts(topObj, connObj->getValue<std::string>("srcId"), connObj->getValue<std::string>("srcName"), true))
{
for (const auto & resolvedDst : resolvePorts(topObj, connObj->getValue<std::string>("dstId"), connObj->getValue<std::string>("dstName"), false))
{
Poco::JSON::Object::Ptr flatConnObj(new Poco::JSON::Object());
flatConnsArray->add(flatConnObj);
flatConnObj->set("srcId", resolvedSrc.first);
flatConnObj->set("srcName", resolvedSrc.second);
flatConnObj->set("dstId", resolvedDst.first);
flatConnObj->set("dstName", resolvedDst.second);
}
}
}
//resolve pass-through connections and totally internal connections
for (const auto &uid : blockUids)
{
const auto blockObj = blocksObj->getObject(uid);
assert(blockObj);
if (not blockIsHier(blockObj)) continue;
const auto subConnsArray = blockObj->getArray("connections");
for (size_t c_i = 0; c_i < subConnsArray->size(); c_i++)
{
const auto subConnObj = subConnsArray->getObject(c_i);
assert(subConnObj);
const bool srcIsThis = subConnObj->getValue<std::string>("srcId") == uid;
const bool dstIsThis = subConnObj->getValue<std::string>("dstId") == uid;
//totally internal connection
if (not srcIsThis and not dstIsThis) flatConnsArray->add(subConnObj);
//otherwise not a pass-through
if (not srcIsThis or not dstIsThis) continue;
//find sources where the destination is this pass-through
for (size_t c_s = 0; c_s < connsArray->size(); c_s++)
{
const auto connObj_s = connsArray->getObject(c_s);
assert(connObj_s);
if (connObj_s->getValue<std::string>("dstId") != uid) continue;
if (connObj_s->getValue<std::string>("dstName") != subConnObj->getValue<std::string>("srcName")) continue;
//find sources where the destination is this pass-through
for (size_t c_d = 0; c_d < connsArray->size(); c_d++)
{
const auto connObj_d = connsArray->getObject(c_d);
assert(connObj_d);
if (connObj_d->getValue<std::string>("srcId") != uid) continue;
if (connObj_d->getValue<std::string>("srcName") != subConnObj->getValue<std::string>("dstName")) continue;
Poco::JSON::Object::Ptr flatConnObj(new Poco::JSON::Object());
flatConnsArray->add(flatConnObj);
flatConnObj->set("srcId", connObj_s->get("srcId"));
flatConnObj->set("srcName", connObj_s->get("srcName"));
flatConnObj->set("dstId", connObj_d->get("dstId"));
flatConnObj->set("dstName", connObj_d->get("dstName"));
}
}
}
}
//set new flat data into the top object
topObj = new Poco::JSON::Object();
topObj->set("blocks", flatBlocksObj);
topObj->set("connections", flatConnsArray);
return hierFound;
}
std::string Pothos::Topology::dumpJSON(const std::string &request)
{
//extract input request
Poco::JSON::Parser p; p.parse(request.empty()?"{}":request);
auto configObj = p.getHandler()->asVar().extract<Poco::JSON::Object::Ptr>();
assert(configObj);
const auto modeConfig = configObj->optValue<std::string>("mode", "flat");
//parse request into traversal arguments
const bool flatten = (modeConfig == "flat");
const bool traverse = (modeConfig != "rendered");
const auto &flows = (modeConfig == "rendered")?_impl->activeFlatFlows:_impl->flows;
//replace rendered names with names from flattened hierarchy
Poco::JSON::Object::Ptr flatBlocks;
if (modeConfig == "rendered")
{
Poco::JSON::Parser pFlat; pFlat.parse(this->dumpJSON("{\"mode\":\"flat\"}"));
auto flatObj = pFlat.getHandler()->asVar().extract<Poco::JSON::Object::Ptr>();
assert(flatObj);
flatBlocks = flatObj->getObject("blocks");
assert(flatBlocks);
}
//output object
Poco::JSON::Object::Ptr topObj(new Poco::JSON::Object());
//create blocks map
Poco::JSON::Object::Ptr blocksObj(new Poco::JSON::Object());
topObj->set("blocks", blocksObj);
for (const auto &block : getObjSetFromFlowList(flows))
{
//gather block info
Poco::JSON::Object::Ptr blockObj(new Poco::JSON::Object());
const auto blockId = block.call<std::string>("uid");
blocksObj->set(blockId, blockObj);
//replace rendered names with names from flattened hierarchy
blockObj->set("name", block.call<std::string>("getName"));
if (flatBlocks and flatBlocks->has(blockId))
{
blockObj->set("name", flatBlocks->getObject(blockId)->getValue<std::string>("name"));
}
//input port info
Poco::JSON::Array::Ptr inputsArray(new Poco::JSON::Array());
for (const auto &portInfo : block.call<std::vector<PortInfo>>("inputPortInfo"))
{
inputsArray->add(portInfoToObj(portInfo));
}
if (inputsArray->size() > 0) blockObj->set("inputs", inputsArray);
//output port info
Poco::JSON::Array::Ptr outputsArray(new Poco::JSON::Array());
for (const auto &portInfo : block.call<std::vector<PortInfo>>("outputPortInfo"))
{
outputsArray->add(portInfoToObj(portInfo));
}
if (outputsArray->size() > 0) blockObj->set("outputs", outputsArray);
//sub-topology info
if (traverse and this->uid() != blockId) try
{
auto subDump = block.call<std::string>("dumpJSON", "{\"mode\":\"top\"}");
Poco::JSON::Parser psub; psub.parse(subDump);
auto subObj = psub.getHandler()->asVar().extract<Poco::JSON::Object::Ptr>();
assert(subObj);
std::vector<std::string> names; subObj->getNames(names);
for (const auto &name : names) blockObj->set(name, subObj->get(name));
}
catch (const Pothos::Exception &){}
}
//create connections list
Poco::JSON::Array::Ptr connsArray(new Poco::JSON::Array());
topObj->set("connections", connsArray);
for (const auto &flow : flows)
{
Poco::JSON::Object::Ptr connObj(new Poco::JSON::Object());
connsArray->add(connObj);
connObj->set("srcId", flow.src.uid);
connObj->set("srcName", flow.src.name);
connObj->set("dstId", flow.dst.uid);
connObj->set("dstName", flow.dst.name);
}
//recursive flatten when instructed
while (flatten and flattenDump(topObj));
//return the string-formatted result
std::stringstream ss; topObj->stringify(ss, 4);
return ss.str();
}
/***********************************************************************
* make topology from JSON string - implementation
**********************************************************************/
std::shared_ptr<Pothos::Topology> Pothos::Topology::make(const std::string &json)
{
//parse the json string/file to a JSON object
const auto topObj = parseJSONStr(json);
//create the proxy environment (local) and the registry
auto env = Pothos::ProxyEnvironment::make("managed");
auto registry = env->findProxy("Pothos/BlockRegistry");
auto evaluator = env->findProxy("Pothos/Util/EvalEnvironment").callProxy("make");
//create thread pools
std::map<std::string, Pothos::Proxy> threadPools;
Poco::JSON::Object::Ptr threadPoolObj;
if (topObj->isObject("threadPools")) threadPoolObj = topObj->getObject("threadPools");
std::vector<std::string> threadPoolNames;
if (threadPoolObj) threadPoolObj->getNames(threadPoolNames);
for (const auto &name : threadPoolNames)
{
std::stringstream ss;
threadPoolObj->getObject(name)->stringify(ss);
Pothos::ThreadPoolArgs args(ss.str());
threadPools[name] = env->findProxy("Pothos/ThreadPool").callProxy("new", args);
}
//create the topology and add it to the blocks
//the IDs 'self', 'this', and '' can be used
std::map<std::string, Pothos::Proxy> blocks;
auto topology = Pothos::Topology::make();
blocks["self"] = env->makeProxy(topology);
blocks["this"] = env->makeProxy(topology);
blocks[""] = env->makeProxy(topology);
//create the blocks
Poco::JSON::Array::Ptr blockArray;
if (topObj->isArray("blocks")) blockArray = topObj->getArray("blocks");
if (blockArray) for (size_t i = 0; i < blockArray->size(); i++)
{
if (not blockArray->isObject(i)) throw Pothos::DataFormatException(
"Pothos::Topology::make()", "blocks["+std::to_string(i)+"] must be an object");
const auto &blockObj = blockArray->getObject(i);
if (not blockObj->has("id")) throw Pothos::DataFormatException(
"Pothos::Topology::make()", "blocks["+std::to_string(i)+"] missing 'id' field");
const auto id = blockObj->getValue<std::string>("id");
blocks[id] = makeBlock(registry, evaluator, blockObj);
//set the thread pool
const auto threadPoolName = blockObj->optValue<std::string>("threadPool", "default");
auto threadPoolIt = threadPools.find(threadPoolName);
if (threadPoolIt != threadPools.end()) blocks[id].callVoid("setThreadPool", threadPoolIt->second);
else if (threadPoolName != "default") throw Pothos::DataFormatException(
"Pothos::Topology::make()", "blocks["+id+"] unknown threadPool = " + threadPoolName);
}
//create the topology and connect the blocks
Poco::JSON::Array::Ptr connArray;
if (topObj->isArray("connections")) connArray = topObj->getArray("connections");
if (connArray) for (size_t i = 0; i < connArray->size(); i++)
{
if (not connArray->isArray(i)) throw Pothos::DataFormatException(
"Pothos::Topology::make()", "connections["+std::to_string(i)+"] must be an array");
const auto &connArgs = connArray->getArray(i);
if (connArgs->size() != 4) throw Pothos::DataFormatException(
"Pothos::Topology::make()", "connections["+std::to_string(i)+"] must be size 4");
//extract connection arg fields
const auto srcId = connArgs->getElement<std::string>(0);
const auto srcPort = connArgs->get(1).toString();
const auto dstId = connArgs->getElement<std::string>(2);
const auto dstPort = connArgs->get(3).toString();
//check that the block IDs exist
if (blocks.count(srcId) == 0) throw Pothos::DataFormatException(
"Pothos::Topology::make()", "connections["+std::to_string(i)+"] no such ID: " + srcId);
if (blocks.count(dstId) == 0) throw Pothos::DataFormatException(
"Pothos::Topology::make()", "connections["+std::to_string(i)+"] no such ID: " + dstId);
//make the connection
topology->connect(blocks.at(srcId), srcPort, blocks.at(dstId), dstPort);
}
return topology;
}
