=== JAVA CODE ===
TextBox emailLookup = new TextBox();
emailLookup.addValidator(new Validator() {
@Override
public int getPriority() {
return 0;
}
@Override
public List<EditorError> validate(Editor editor, Object value) {
List<EditorError> result = new ArrayList<EditorError>();
String valueStr = value == null ? "" : value.toString();
if (!valueStr.matches(EMAIL_REGEXP)) {
result.add(new BasicEditorError(emailLookup, value, "Not a valid email address"));
} else if (isEmailReapeated(valueStr)) {
result.add(new BasicEditorError(emailLookup, value, "Email address is repeated"));
}
return result;
}
});
=== UI BINDER ===
<b:Row addStyleNames="{style.padding}">
<b:Column size="XS_12">
<b:Row>
<b:Column size="XS_2">
<b:FormGroup>
<b:TextBox ui:field="emailLookup" placeholder="Enter email" allowBlank="false"/>
<b:InlineHelpBlock iconType="EXCLAMATION"/>
</b:FormGroup>
</b:Column>
<b:Column size="XS_1">
<b:Button ui:field="addContact" text="Add"/>
</b:Column>
</b:Row>
</b:Column>
</b:Row>
