Program: 138846
Project: 138846
Buggy source:
public Object[] getElements(Object inputElement){
  if (!(inputElement instanceof ColumnSet || inputElement instanceof TdXmlSchema || (inputElement instanceof TdXmlElementType && !XmlElementHelper.isLeafNode((TdXmlElementType)inputElement)))) {
    return new Object[0];
  }
  EObject eObj=(EObject)inputElement;
  ColumnSet columnSet=SwitchHelpers.COLUMN_SET_SWITCH.doSwitch(eObj);
  if (columnSet != null) {
    TdColumn[] columns=EObjectHelper.getColumns(columnSet);
    if (columns.length <= 0) {
      Package parentCatalogOrSchema=ColumnSetHelper.getParentCatalogOrSchema(columnSet);
      if (parentCatalogOrSchema == null) {
        return null;
      }
      Connection conn=DataProviderHelper.getTdDataProvider(parentCatalogOrSchema);
      if (conn == null) {
        return null;
      }
      try {
        List<TdColumn> columnList=DqRepositoryViewService.getColumns(conn,columnSet,null,true);
        columns=columnList.toArray(new TdColumn[columnList.size()]);
      }
 catch (      TalendException e) {
        MessageBoxExceptionHandler.process(e);
      }
      ProxyRepositoryViewObject.save(conn);
    }
    return sort(columns,ComparatorsFactory.MODELELEMENT_COMPARATOR_ID);
  }
 else {
    TdXmlSchema xmlDocument=SwitchHelpers.XMLSCHEMA_SWITCH.doSwitch(eObj);
    if (xmlDocument != null) {
      List<ModelElement> xmlElements=DqRepositoryViewService.getXMLElements(xmlDocument);
      List<TdXmlElementType> leafNodes=XmlElementHelper.getLeafNode(xmlElements);
      return sort(leafNodes.toArray(),ComparatorsFactory.MODELELEMENT_COMPARATOR_ID);
    }
 else {
      TdXmlElementType xmlElement=SwitchHelpers.XMLELEMENTTYPE_SWITCH.doSwitch(eObj);
      if (xmlElement != null) {
        List<TdXmlElementType> xmlElements=DqRepositoryViewService.getXMLElements(xmlElement);
        List<TdXmlElementType> leafNodes=XmlElementHelper.getLeafNode(xmlElements);
        return sort(leafNodes.toArray(),ComparatorsFactory.MODELELEMENT_COMPARATOR_ID);
      }
    }
  }
  return null;
}

Fixed version (ground truth):
public Object[] getElements(Object inputElement){
  if (!(inputElement instanceof ColumnSet || inputElement instanceof TdXmlSchema || (inputElement instanceof TdXmlElementType && !XmlElementHelper.isLeafNode((TdXmlElementType)inputElement)))) {
    return new Object[0];
  }
  EObject eObj=(EObject)inputElement;
  ColumnSet columnSet=SwitchHelpers.COLUMN_SET_SWITCH.doSwitch(eObj);
  if (columnSet != null) {
    TdColumn[] columns=EObjectHelper.getColumns(columnSet);
    if (columns.length <= 0) {
      Package parentCatalogOrSchema=ColumnSetHelper.getParentCatalogOrSchema(columnSet);
      if (parentCatalogOrSchema == null) {
        return null;
      }
      Connection conn=DataProviderHelper.getTdDataProvider(parentCatalogOrSchema);
      if (conn == null) {
        return null;
      }
      try {
        List<TdColumn> columnList=DqRepositoryViewService.getColumns(conn,columnSet,null,true);
        columns=columnList.toArray(new TdColumn[columnList.size()]);
      }
 catch (      TalendException e) {
        MessageBoxExceptionHandler.process(e);
      }
      ProxyRepositoryViewObject.fetchAllDBRepositoryViewObjects(Boolean.TRUE);
      ProxyRepositoryViewObject.save(conn);
    }
    return sort(columns,ComparatorsFactory.MODELELEMENT_COMPARATOR_ID);
  }
 else {
    TdXmlSchema xmlDocument=SwitchHelpers.XMLSCHEMA_SWITCH.doSwitch(eObj);
    if (xmlDocument != null) {
      List<ModelElement> xmlElements=DqRepositoryViewService.getXMLElements(xmlDocument);
      List<TdXmlElementType> leafNodes=XmlElementHelper.getLeafNode(xmlElements);
      return sort(leafNodes.toArray(),ComparatorsFactory.MODELELEMENT_COMPARATOR_ID);
    }
 else {
      TdXmlElementType xmlElement=SwitchHelpers.XMLELEMENTTYPE_SWITCH.doSwitch(eObj);
      if (xmlElement != null) {
        List<TdXmlElementType> xmlElements=DqRepositoryViewService.getXMLElements(xmlElement);
        List<TdXmlElementType> leafNodes=XmlElementHelper.getLeafNode(xmlElements);
        return sort(leafNodes.toArray(),ComparatorsFactory.MODELELEMENT_COMPARATOR_ID);
      }
    }
  }
  return null;
}