content: /*
   * Copyright 2002-2019 Drew Noakes and contributors
   *
   *    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
   *
   *        https://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.
   *
   * More information about this project is available at:
   *
   *    https://drewnoakes.com/code/exif/
   *    https://github.com/drewnoakes/metadata-extractor
   */
  
  package com.drew.lang;
  
  import com.drew.lang.annotations.NotNull;
  import com.drew.lang.annotations.Nullable;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.util.Iterator;
  
  /**
   * @author Drew Noakes https://drewnoakes.com
   */
  public final class StringUtil
  {
      @NotNull
      public static String join(@NotNull Iterable<? extends CharSequence> strings, @NotNull String delimiter)
      {
          int capacity = 0;
          int delimLength = delimiter.length();
  
          Iterator<? extends CharSequence> iter = strings.iterator();
          if (iter.hasNext())
              capacity += iter.next().length() + delimLength;
  
          StringBuilder buffer = new StringBuilder(capacity);
          iter = strings.iterator();
          if (iter.hasNext()) {
              buffer.append(iter.next());
              while (iter.hasNext()) {
                  buffer.append(delimiter);
                  buffer.append(iter.next());
              }
          }
          return buffer.toString();
      }
  
      @NotNull
      public static <T extends CharSequence> String join(@NotNull T[] strings, @NotNull String delimiter)
      {
          int capacity = 0;
          int delimLength = delimiter.length();
          for (T value : strings)
              capacity += value.length() + delimLength;
  
          StringBuilder buffer = new StringBuilder(capacity);
          boolean first = true;
          for (T value : strings) {
              if (!first) {
                  buffer.append(delimiter);
              } else {
                  first = false;
              }
              buffer.append(value);
          }
          return buffer.toString();
      }
  
      @NotNull
      public static String fromStream(@NotNull InputStream stream) throws IOException
      {
          BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
          StringBuilder sb = new StringBuilder();
          String line;
          while ((line = reader.readLine()) != null) {
              sb.append(line);
          }
          return sb.toString();
      }
  
      public static int compare(@Nullable String s1, @Nullable String s2)
      {
          boolean null1 = s1 == null;
          boolean null2 = s2 == null;
  
          if (null1 && null2) {
              return 0;
          } else if (null1) {
              return -1;
          } else if (null2) {
              return 1;
          } else {
              return s1.compareTo(s2);
          }
      }
  
      @NotNull
      public static String urlEncode(@NotNull String name)
      {
          // Sufficient for now, it seems
          return name.replace(" ", "%20");
      }
  }
  