Portlet Factory, Version 6.1.2

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A Validate Method Implementation

The validate method follows the process of analyzing an expression and calling the appropriate method to perform the actual operation; in this case validating that the user used only numeric characters for the phone number input.

public boolean validate(String value, String expression) { boolean result = false; if(expression.equals(VALIDATEPHONE)) { result = validatePhoneNumber(value); return result;
}

The validatePhoneNumber method checks to see if the value argument is only made up of numeric characters:

boolean validatePhoneNumber(String value) { boolean result = true; char ch; for(int index = 0; index < value.length(); index++) { ch = value.charAt(index); if (ch<48 || ch>57) { result=false; setErrorMessage("Phone numbers cannot include letters."); return result;
}

 

An Error Message for Failed Validation

In the code example above, notice that if a character was found to be outside of the ASCII range of numeric characters, the code calls the setErrorMessage method, setting the message string with an appropriate error message.

Parent topic: About creating a formatter class

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