a parsed URI. More...

Public Member Functions
	URI (const TString &uri)
	Construct URI by parsing given string.

Static Public Member Functions
static TString	getURI (const TObject *obj)
	get URI string to given object.

Public Attributes
const TObject *	object = nullptr
	object referenced (or NULL).

TString	scheme = ""
	scheme name (part before first colon).

TString	entryName = ""
	name of DataStore entry.

int	arrayIndex = -1
	index in array, only valid if arrayName and object are filled.

Detailed Description

a parsed URI.

allowed URI formats are

durability:[entryName[/arrayIndex]] (durability: event/persistent) raw:addressOfTObject (for objects not in DataStore) main: (the main page)

Definition at line 63 of file InfoWidget.h.

Constructor & Destructor Documentation

◆ URI() [1/2]

URI ( )

inline

Definition at line 64 of file InfoWidget.h.

64{}

◆ URI() [2/2]

URI ( const TString & uri )

explicit

Construct URI by parsing given string.

Definition at line 340 of file InfoWidget.cc.

{
  //split uri into schema:path (no double slash: only path after scheme)
  Ssiz_t protStart = uri.First(":");
  Ssiz_t protEnd = protStart + 1;
  if (protStart >= uri.Length())
    B2FATAL("URI has invalid format: " << uri);
  scheme = uri(0, protStart);
  TString path = uri(protEnd, uri.Length() - 1);
 
  if (scheme == "raw") {
    //interpret path as pointer
    object = reinterpret_cast<TObject*>(path.Atoll());
  } else if (path.Length() > 0 and path != "/") {
    //event/persistent
    DataStore::EDurability durability = getDurability(scheme);
 
    Ssiz_t delim = path.Last('/');
    Ssiz_t idxFieldLength = path.Length() - delim - 1;
    if (delim >= path.Length())
      B2FATAL("URI has invalid format: " << path);
    //ok, set entryName
    entryName = path(0, delim);
    if (idxFieldLength > 0) {
      //array index found
      arrayIndex = TString(path(delim + 1, idxFieldLength)).Atoi();
      const StoreArray<TObject> arr(entryName.Data(), durability);
      if (arrayIndex < arr.getEntries())
        object = arr[arrayIndex];
    }
    const auto& entries = DataStore::Instance().getStoreEntryMap(durability);
    const auto& it = entries.find(entryName.Data());
    if (it == entries.end()) {
      B2ERROR("Given entry '" << entryName << "' not found in DataStore, invalid URI?");
    } else if (!it->second.isArray) {
      //also set object for StoreObjPtr
      object = it->second.object;
    }
  }
}

Member Function Documentation

◆ getURI()

TString getURI ( const TObject * obj )

static

get URI string to given object.

Definition at line 272 of file InfoWidget.cc.

{
  auto pos = ObjectInfo::getDataStorePosition(obj);
  if (pos.first.empty()) {
    B2DEBUG(100, "No DataStore entry found for " << obj->GetName() << ", using raw pointer.");
    return TString::Format("raw:%lu", (long)obj);
  }
  return TString::Format("event:%s/%d", pos.first.c_str(), pos.second);
}

Member Data Documentation

◆ arrayIndex

int arrayIndex = -1

index in array, only valid if arrayName and object are filled.

Definition at line 74 of file InfoWidget.h.

◆ entryName

TString entryName = ""

name of DataStore entry.

Definition at line 73 of file InfoWidget.h.

◆ object

const TObject* object = nullptr

object referenced (or NULL).

Definition at line 71 of file InfoWidget.h.

◆ scheme

TString scheme = ""

scheme name (part before first colon).

Definition at line 72 of file InfoWidget.h.

The documentation for this struct was generated from the following files:

display/include/InfoWidget.h
display/src/InfoWidget.cc

Public Member Functions

Static Public Member Functions

Public Attributes