src/com/googlecode/lanterna/gui2/dialogs/TextInputDialogResultValidator.java

   1 package com.googlecode.lanterna.gui2.dialogs;
   2
   3 /**
   4  * Interface to implement for custom validation of text input in a {@code TextInputDialog}
   5  * @author Martin
   6  */
   7 public interface TextInputDialogResultValidator {
   8     /**
   9      * Tests the content in the text box if it is valid or not
  10      * @param content Current content of the text box
  11      * @return {@code null} if the content is valid, or an error message explaining what's wrong with the content
  12      * otherwise
  13      */
  14     String validate(String content);
  15 }