Program: 129906
Project: 129906
Buggy source:
/** 
 * Ensures that fields are set. Update checkEnable / use to checkConnection().
 * @return
 */
@Override protected boolean checkFieldsValue(){
  previewInformationLabel.setText("String_Node_Str" + Messages.getString("String_Node_Str"));
  updateStatus(IStatus.OK,null);
  previewButton.setEnabled(false);
  String msg=fieldsTableEditorView.checkColumnNames();
  if (!StringUtils.isEmpty(msg)) {
    updateStatus(IStatus.ERROR,msg);
    return false;
  }
  ArrayList<LabelledCheckboxCombo> labelledCheckboxCombo2Control=new ArrayList<LabelledCheckboxCombo>();
  Iterator<LabelledCheckboxCombo> iCheckboxCombo;
  LabelledCheckboxCombo labelledCheckboxCombo;
  for (iCheckboxCombo=labelledCheckboxCombo2Control.iterator(); iCheckboxCombo.hasNext(); ) {
    labelledCheckboxCombo=iCheckboxCombo.next();
    if (labelledCheckboxCombo.getCheckbox().getSelection()) {
      if (labelledCheckboxCombo.getText() == "String_Node_Str") {
        updateStatus(IStatus.ERROR,labelledCheckboxCombo.getLabelText() + Messages.getString("String_Node_Str"));
        return false;
      }
    }
  }
  previewInformationLabel.setText("String_Node_Str");
  if (isContextMode()) {
    ContextType contextType=ConnectionContextHelper.getContextTypeForContextMode(connectionItem.getConnection(),true);
  }
  if (xsdFilePath != null && XmlUtil.isXSDFile(xsdFilePath)) {
    previewButton.setEnabled(false);
  }
 else {
    previewButton.setEnabled(true);
  }
  if (concept == null || concept.getConceptTargets().isEmpty()) {
    updateStatus(IStatus.ERROR,null);
    return false;
  }
  updateStatus(IStatus.OK,null);
  return true;
}

Fixed version (ground truth):
/** 
 * Ensures that fields are set. Update checkEnable / use to checkConnection().
 * @return
 */
@Override protected boolean checkFieldsValue(){
  previewInformationLabel.setText("String_Node_Str" + Messages.getString("String_Node_Str"));
  updateStatus(IStatus.OK,null);
  previewButton.setEnabled(false);
  String msg=fieldsTableEditorView.checkColumnNames();
  if (!StringUtils.isEmpty(msg)) {
    updateStatus(IStatus.ERROR,msg);
    return false;
  }
  ArrayList<LabelledCheckboxCombo> labelledCheckboxCombo2Control=new ArrayList<LabelledCheckboxCombo>();
  Iterator<LabelledCheckboxCombo> iCheckboxCombo;
  LabelledCheckboxCombo labelledCheckboxCombo;
  for (iCheckboxCombo=labelledCheckboxCombo2Control.iterator(); iCheckboxCombo.hasNext(); ) {
    labelledCheckboxCombo=iCheckboxCombo.next();
    if (labelledCheckboxCombo.getCheckbox().getSelection()) {
      if (labelledCheckboxCombo.getText() == "String_Node_Str") {
        updateStatus(IStatus.ERROR,labelledCheckboxCombo.getLabelText() + Messages.getString("String_Node_Str"));
        return false;
      }
    }
  }
  previewInformationLabel.setText("String_Node_Str");
  if (isContextMode()) {
    ContextType contextType=ConnectionContextHelper.getContextTypeForContextMode(connectionItem.getConnection(),true);
  }
  if (xsdFilePath != null && XmlUtil.isXSDFile(xsdFilePath)) {
    previewButton.setEnabled(false);
  }
 else {
    previewButton.setEnabled(true);
  }
  if (concept == null || concept.getConceptTargets().isEmpty()) {
    updateStatus(IStatus.ERROR,null);
    return false;
  }
  if ("String_Node_Str".equals(prefixCombo.getText())) {
    updateStatus(IStatus.ERROR,"String_Node_Str");
    return false;
  }
  updateStatus(IStatus.OK,null);
  return true;
}