content: /*
   * Created on Nov 10, 2008
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
   * the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
   * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
   * specific language governing permissions and limitations under the License.
   *
   * Copyright @2008-2013 the original author or authors.
   */
  package org.fest.swing.driver;
  
  import static java.lang.String.valueOf;
  import static org.fest.util.Strings.concat;
  
  import javax.annotation.Nonnull;
  import javax.swing.JComboBox;
  
  import org.fest.swing.annotation.RunsInCurrentThread;
  
  /**
   * <p>
   * Validates that a given number is a valid index of an item in a {@code JComboBox}.
   * </p>
   *
   * <p>
   * <b>Note:</b> Methods in this class are accessed in the current executing thread. Such thread may or may not be the
   * event dispatch thread (EDT.) Client code must call methods in this class from the EDT.
   * </p>
   *
   * @author Alex Ruiz
   */
  final class JComboBoxItemIndexPreconditions {
    @RunsInCurrentThread
    static void checkItemIndexInBounds(@Nonnull JComboBox comboBox, int index) {
      if (index < 0) {
        String msg = String.format("%s should not be less than zero", itemIndex(index));
        throw new IndexOutOfBoundsException(msg);
      }
      int itemCount = comboBox.getItemCount();
      if (itemCount == 0) {
        throw new IndexOutOfBoundsException("JComboBox is empty");
      }
      if (index >= 0 && index < itemCount) {
        return;
      }
      String msg = String.format("%s should be between [0] and [%d] (inclusive)", itemIndex(index), itemCount - 1);
      throw new IndexOutOfBoundsException(msg);
    }
  
    private static String itemIndex(int index) {
      return concat("Item index (", valueOf(index), ")");
    }
  
    private JComboBoxItemIndexPreconditions() {}
  }
  