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/*
@ITMillApache2LicenseForJavaFiles@
*/
package com.itmill.toolkit.tests.book;
import com.itmill.toolkit.data.Property;
import com.itmill.toolkit.data.Validator;
import com.itmill.toolkit.data.Property.ValueChangeEvent;
import com.itmill.toolkit.ui.CustomComponent;
import com.itmill.toolkit.ui.FormLayout;
import com.itmill.toolkit.ui.Label;
import com.itmill.toolkit.ui.OrderedLayout;
import com.itmill.toolkit.ui.TextField;
/* Finnish Social Security Number input field that validates the value. */
public class SSNField extends CustomComponent implements
Property.ValueChangeListener {
OrderedLayout layout = new FormLayout();
// new OrderedLayout(OrderedLayout.ORIENTATION_HORIZONTAL); //;new
// FormLayout();
TextField myfield;
Label myerror;
/** Validator for Finnish Social Security Number. */
class SSNValidator implements Validator {
/** The isValid() is simply a wrapper for the validate() method. */
public boolean isValid(Object value) {
try {
validate(value);
} catch (final InvalidValueException e) {
return false;
}
return true;
}
/** Validate the given SSN. */
public void validate(Object value) throws InvalidValueException {
final String ssn = (String) value;
if (ssn.length() == 0) {
return;
}
if (ssn.length() != 11) {
throw new InvalidValueException("Invalid SSN length");
}
final String numbers = ssn.substring(0, 6) + ssn.substring(7, 10);
final int checksum = new Integer(numbers).intValue() % 31;
if (!ssn.substring(10).equals(
"0123456789ABCDEFHJKLMNPRSTUVWXY".substring(checksum,
checksum + 1))) {
throw new InvalidValueException("Invalid SSN checksum");
}
}
}
SSNField() {
setCompositionRoot(layout);
layout.setOrientation(FormLayout.ORIENTATION_VERTICAL);
/* Create the text field for the SSN. */
myfield = new TextField("Social Security Number");
myfield.setColumns(11);
/* Create and set the validator object for the field. */
myfield.addValidator(new SSNValidator());
/*
* ValueChageEvent will be generated immediately when the component
* loses focus.
*/
myfield.setImmediate(true);
/* Listen for ValueChangeEvent events. */
myfield.addListener(this);
layout.addComponent(myfield);
/* The field will have an error label, normally invisible. */
myerror = new Label();
layout.addComponent(myerror);
}
public void valueChange(ValueChangeEvent event) {
try {
/* Validate the field value. */
myfield.validate();
/* The value was correct. */
myerror.setValue("Ok");
} catch (final Validator.InvalidValueException e) {
/* Report the error message to the user. */
myerror.setValue(e.getMessage());
}
}
}
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