content: /*
   * Copyright (C) 2012 The Android Open Source Project
   *
   * 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.
   */
  
  package com.amnesica.kryptey.inputmethod.latin.common;
  
  import java.util.ArrayList;
  
  /**
   * Utility methods for working with collections.
   */
  public final class CollectionUtils {
    private CollectionUtils() {
      // This utility class is not publicly instantiable.
    }
  
    /**
     * Converts a sub-range of the given array to an ArrayList of the appropriate type.
     *
     * @param array Array to be converted.
     * @param start First index inclusive to be converted.
     * @param end   Last index exclusive to be converted.
     * @throws IllegalArgumentException if start or end are out of range or start &gt; end.
     */
    public static <E> ArrayList<E> arrayAsList(final E[] array, final int start,
                                               final int end) {
      if (start < 0 || start > end || end > array.length) {
        throw new IllegalArgumentException("Invalid start: " + start + " end: " + end
            + " with array.length: " + array.length);
      }
  
      final ArrayList<E> list = new ArrayList<>(end - start);
      for (int i = start; i < end; i++) {
        list.add(array[i]);
      }
      return list;
    }
  }
  