Program: 91829
Project: 91829
Buggy source:
@Override protected void initializeDataSource(){
  super.initializeDataSource();
  ITmfTrace trace=this.getTrace();
  if (trace == null) {
    return;
  }
  Element viewElement=fViewInfo.getViewElement(TmfXmlUiStrings.XY_VIEW);
  if (viewElement == null) {
    return;
  }
  Iterable<String> analysisIds=fViewInfo.getViewAnalysisIds(viewElement);
  List<ITmfAnalysisModuleWithStateSystems> stateSystemModules=new LinkedList<>();
  if (!analysisIds.iterator().hasNext()) {
    for (    ITmfAnalysisModuleWithStateSystems module : trace.getAnalysisModulesOfClass(ITmfAnalysisModuleWithStateSystems.class)) {
      stateSystemModules.add(module);
    }
  }
 else {
    for (    String moduleId : analysisIds) {
      @SuppressWarnings("String_Node_Str") ITmfAnalysisModuleWithStateSystems module=trace.getAnalysisModuleOfClass(ITmfAnalysisModuleWithStateSystems.class,moduleId);
      if (module != null) {
        stateSystemModules.add(module);
      }
    }
  }
  fDisplay=null;
  fSeriesName=null;
  ITmfStateSystem ss=null;
  fEntry=null;
  for (  ITmfAnalysisModuleWithStateSystems module : stateSystemModules) {
    module.schedule();
    if (module instanceof TmfStateSystemAnalysisModule) {
      ((TmfStateSystemAnalysisModule)module).waitForInitialization();
    }
    for (    ITmfStateSystem ssq : module.getStateSystems()) {
      if (ssq != null) {
        ss=ssq;
        break;
      }
    }
  }
  if (ss == null) {
    return;
  }
  List<Element> entries=XmlUtils.getChildElements(viewElement,TmfXmlUiStrings.ENTRY_ELEMENT);
  Element entryElement=entries.get(0);
  String path=entryElement.getAttribute(TmfXmlUiStrings.PATH);
  if (path.isEmpty()) {
    path=TmfXmlStrings.WILDCARD;
  }
  XmlXYEntry entry=new XmlXYEntry(ss,path,entryElement);
  fEntry=entry;
  List<Element> displayElements=XmlUtils.getChildElements(entryElement,TmfXmlUiStrings.DISPLAY_ELEMENT);
  if (displayElements.isEmpty()) {
    Activator.logWarning(String.format("String_Node_Str",path));
    return;
  }
  Element displayElement=displayElements.get(0);
  fDisplay=fFactory.createStateAttribute(displayElement,entry);
  List<Element> seriesNameElements=XmlUtils.getChildElements(entryElement,TmfXmlUiStrings.NAME_ELEMENT);
  if (!seriesNameElements.isEmpty()) {
    Element seriesNameElement=seriesNameElements.get(0);
    fSeriesName=fFactory.createStateAttribute(seriesNameElement,entry);
  }
}

Fixed version (ground truth):
@Override protected void initializeDataSource(){
  super.initializeDataSource();
  ITmfTrace trace=this.getTrace();
  if (trace == null) {
    return;
  }
  Element viewElement=fViewInfo.getViewElement(TmfXmlUiStrings.XY_VIEW);
  if (viewElement == null) {
    return;
  }
  Iterable<String> analysisIds=fViewInfo.getViewAnalysisIds(viewElement);
  List<ITmfAnalysisModuleWithStateSystems> stateSystemModules=new LinkedList<>();
  if (!analysisIds.iterator().hasNext()) {
    for (    ITmfAnalysisModuleWithStateSystems module : trace.getAnalysisModulesOfClass(ITmfAnalysisModuleWithStateSystems.class)) {
      stateSystemModules.add(module);
    }
  }
 else {
    for (    String moduleId : analysisIds) {
      @SuppressWarnings("String_Node_Str") ITmfAnalysisModuleWithStateSystems module=trace.getAnalysisModuleOfClass(ITmfAnalysisModuleWithStateSystems.class,moduleId);
      if (module != null) {
        stateSystemModules.add(module);
      }
    }
  }
  fDisplay=null;
  fSeriesName=null;
  ITmfStateSystem ss=null;
  fEntry=null;
  for (  ITmfAnalysisModuleWithStateSystems module : stateSystemModules) {
    IStatus status=module.schedule();
    if (status.isOK()) {
      if (module instanceof TmfStateSystemAnalysisModule) {
        ((TmfStateSystemAnalysisModule)module).waitForInitialization();
      }
      for (      ITmfStateSystem ssq : module.getStateSystems()) {
        if (ssq != null) {
          ss=ssq;
          break;
        }
      }
    }
 else {
      return;
    }
  }
  if (ss == null) {
    return;
  }
  List<Element> entries=XmlUtils.getChildElements(viewElement,TmfXmlUiStrings.ENTRY_ELEMENT);
  Element entryElement=entries.get(0);
  String path=entryElement.getAttribute(TmfXmlUiStrings.PATH);
  if (path.isEmpty()) {
    path=TmfXmlStrings.WILDCARD;
  }
  XmlXYEntry entry=new XmlXYEntry(ss,path,entryElement);
  fEntry=entry;
  List<Element> displayElements=XmlUtils.getChildElements(entryElement,TmfXmlUiStrings.DISPLAY_ELEMENT);
  if (displayElements.isEmpty()) {
    Activator.logWarning(String.format("String_Node_Str",path));
    return;
  }
  Element displayElement=displayElements.get(0);
  fDisplay=fFactory.createStateAttribute(displayElement,entry);
  List<Element> seriesNameElements=XmlUtils.getChildElements(entryElement,TmfXmlUiStrings.NAME_ELEMENT);
  if (!seriesNameElements.isEmpty()) {
    Element seriesNameElement=seriesNameElements.get(0);
    fSeriesName=fFactory.createStateAttribute(seriesNameElement,entry);
  }
}