如何删除此java代码中的代码重复

Question

Using the same for-each loop inside 2 different method, is there any way to reduce code duplication here?

1st code

for (AjaxControlBean controlBean : requestData.getControls()) {
    if (StringUtils.isAnyBlank(controlBean.getId(), controlBean.getName()) || "repeat".equalsIgnoreCase(controlBean.getType())) 
    {
        continue;
    }
    FormInstanceControl control = formInstance.getControl(controlBean.getId());
    if (control == null) {
       control = new FormInstanceControl();
       control.setFormInstance(formInstance);
       control.setControlId(controlBean.getId());
       formInstance.putControl(control);
    }
    if (controlBean.getValues() != null) {
       if (control.getData() != null)
          control.getData().clear();
       else
          control.setData(new ArrayList<FormInstanceData>());

       for (String value : controlBean.getValues()) {
           FormInstanceData data = new FormInstanceData();
           data.setControl(control);
           data.setType(FormInstanceData.TYPE_TEXT);
           data.setText(value);
           control.getData().add(data);
       }
    }
}

2nd code

for (AjaxControlBean controlBean : requestData.getControls()) {
     if (StringUtils.isAnyBlank(controlBean.getId(), controlBean.getName()) || "repeat".equalsIgnoreCase(controlBean.getType())) {
         continue;
     }
     FormInstanceControl control = formInstance.getControl(controlBean.getId());
     if (control == null) {
        control = new FormInstanceControl();
        control.setFormInstance(formInstance);
        control.setControlId(controlBean.getId());
        formInstance.putControl(control);
     }
     if (controlBean.getValues() != null) {
        if (control.getData() != null) {
            control.getData().clear();
        } 
        else 
        {
            control.setData(new ArrayList<FormInstanceData>());
        }
        int i = 0;
        for (String value : controlBean.getValues()) {
            FormInstanceData data = new FormInstanceData();
            data.setControl(control);
            data.setType(FormInstanceData.TYPE_TEXT);
            data.setText(value);
            data.setIdx(i++);
            control.getData().add(data);
        }
    }
}

the only difference it has is the data.setIdx(i++); Please let me know if there is anything i can do to reduce number of lines

Answer 1

You could factor out a method that takes a FormInstanceControl and a AjaxControlBean as arguments. Then you've got all you need:

private void addBeanData( FormInstanceControl control, AjaxControlBean controlBean) {
    int i = 0;
    for (String value : controlBean.getValues()) {
        FormInstanceData data = new FormInstanceData();
        data.setControl(control);
        data.setType(FormInstanceData.TYPE_TEXT);
        data.setText(value);
        data.setIdx(i++);
        control.getData().add(data);
     }
}

This assumes, the first snippet doesn't break if the Idx is set, even if it's not done there in the original code.

Usage: Where before you had the for-loops, you just do addBeanData( control, controlBean );