content: /**
   * Copyright 2016 Bartosz Schiller
   * <p>
   * 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.github.barteksc.pdfviewer.util;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class ArrayUtils {
  
      private ArrayUtils() {
          // Prevents instantiation
      }
  
      /** Transforms (0,1,2,2,3) to (0,1,2,3) */
      public static int[] deleteDuplicatedPages(int[] pages) {
          List<Integer> result = new ArrayList<>();
          int lastInt = -1;
          for (Integer currentInt : pages) {
              if (lastInt != currentInt) {
                  result.add(currentInt);
              }
              lastInt = currentInt;
          }
          int[] arrayResult = new int[result.size()];
          for (int i = 0; i < result.size(); i++) {
              arrayResult[i] = result.get(i);
          }
          return arrayResult;
      }
  
      /** Transforms (0, 4, 4, 6, 6, 6, 3) into (0, 1, 1, 2, 2, 2, 3) */
      public static int[] calculateIndexesInDuplicateArray(int[] originalUserPages) {
          int[] result = new int[originalUserPages.length];
          if (originalUserPages.length == 0) {
              return result;
          }
  
          int index = 0;
          result[0] = index;
          for (int i = 1; i < originalUserPages.length; i++) {
              if (originalUserPages[i] != originalUserPages[i - 1]) {
                  index++;
              }
              result[i] = index;
          }
  
          return result;
      }
  
      public static String arrayToString(int[] array) {
          StringBuilder builder = new StringBuilder("[");
          for (int i = 0; i < array.length; i++) {
              builder.append(array[i]);
              if (i != array.length - 1) {
                  builder.append(",");
              }
          }
          builder.append("]");
          return builder.toString();
      }
  }
  