JSF skip Required-Validation without immediate=true

Question

I have multiple forms, where I have mandatory fields and optional fields.

To submit such a form I require the validation on the required-attribute to be exe

Answer 1

if you want to skip validation when click on button then easly add parameter to button where you want to skip it. Example:

Then in validator you can read this parameter and if it is true then skip it:

@FacesValidator("com.validators.MyValidator")
public class MyValidator implements Validator{

  public void validate(FacesContext ct, UIComponent co, Object obj) throws ValidatorException { 
    if(!continueValidation()){
      return;
    }
    // validation process
  }

protected boolean continueValidation() {
    String skipValidator= FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("skipValidator");
    if (skipValidator != null && skipValidator.equalsIgnoreCase("true")) {
      return false;
    }
    return true;
  } 
}