Regular Expression validation in ADF

We can use regular expressions for validations in ADF.

• For UI input components we can use regex as below:

<af:inputText label="Label 1" autoSubmit="true">
 <af:validateRegExp pattern="[0-9]{1,10}"
                               noMatchMessageDetail="Only Numbers are allowed"/>
</af:inputText>
<af:commandButton text="commandButton 1"/>

In above example, the moment we tab out of input text, we get an error message with the text we provided.

• We can also write our custom validator in managed bean:

    public void inputTextValidator(FacesContext facesContext,
                                   UIComponent uIComponent, Object object) {
        // Add event code here...
    }

 <af:inputText label="Label 1" id="it3"
                            validator="#{pageFlowScope.UIBean.inputTextValidator}">              
              </af:inputText>

• Also we can use regex in the model layer with an attribute level validator - this will eliminate getting wrong data if someone uses the same business service in another UI.

Some common regex examples are:

Validation for decimal places

 String REGEX_CHECK_DECIMAL =
            "^-?\\d{1," + (length - decimal) + "}(?>\\.\\d{1," + decimal+ "})?$";

where length is total length of the String and decimal is no of decimal digits.

Validation for String uppercase

String REGEX_CHECK_UPPERCASE ="[A-Z]+";

more to come....