有可能会访问到重复的元件，如果是已经访问过的就不添加了。

Signed-off-by: dmy@lab <dmy@lab.lab>

testHasttable/topologyrecorder.cpp

@@ -83,7 +83,6 @@ bool TopologyRecorder::startWithNode(const QString& node)
     {
         TopologyRecorder::Type::EleType typ;
         BasicElementInfo *foundEle=NULL;
-//        bool foundCate=false;
         anotherTerminal=anotherTerminalVector.at(atI);
         if(this->reachedTerminal.contains(anotherTerminal))
         {
@@ -109,10 +108,6 @@ bool TopologyRecorder::startWithNode(const QString& node)
             }
             terminalA=AC->getTerminalA();
             terminalB=AC->getTerminalB();
-//            std::cout<<"find"<<AC->getID().toStdString()<<std::endl;
-//            std::cout<<AC->getNamingDescription().toStdString()<<std::endl;
-            //把线路长度也输出来看一下
-//            std::cout<<AC->getLength()<<std::endl;
             foundEle=AC;
             typ=TopologyRecorder::Type::AC;
         }
@@ -244,6 +239,12 @@ bool TopologyRecorder::startWithNode(const QString& node)
             Branch *branch=NULL;
             switch(typ)
             {
+                //有可能会访问到重复的元件，所以这里判断一下，如果是已经访问过的就不添加了。
+                if(this->hasAdded.contains(foundEle->getID()))
+                {
+                    continue;
+                }
+                this->hasAdded[foundEle->getID()]=0;
                 case TopologyRecorder::Type::AC:
                 branch=new Line(fromTo,static_cast<ACLineSegment *>(foundEle),this);
                 this->cimExporter.add(fromTo,static_cast<Line *>(branch));