net.sf.staccatocommons.lang.thunk.internal.UndefinedThunk Maven / Gradle / Ivy

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/*
 Copyright (c) 2011, The Staccato-Commons Team

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; version 3 of the License.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Lesser General Public License for more details.
 */
package net.sf.staccatocommons.lang.thunk.internal;

import java.util.NoSuchElementException;

import net.sf.staccatocommons.defs.Thunk;
import net.sf.staccatocommons.restrictions.Constant;

/**
 * @author flbulgarelli
 * 
 */
public class UndefinedThunk implements Thunk {

  public A value() {
    throw new NoSuchElementException("Undefined");
  }

  public String toString() {
    return "Undefined";
  }

  /**
   * @return a {@link Constant} {@link UndefinedThunk}
   */
  @Constant
  public static  Thunk undefined() {
    return new UndefinedThunk();
  }

}