content: package net.sf.expectit;
  
  /*
   * #%L
   * ExpectIt
   * %%
   * Copyright (C) 2014 Alexey Gavrilov 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
   * 
   *      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.
   * #L%
   */
  
  import java.io.Flushable;
  import java.io.IOException;
  import java.nio.charset.Charset;
  
  /**
   * A class to hold static utility methods.
   */
  final class Utils {
  
      static final int MAX_STRING_LENGTH = 200;
  
      private Utils() {
      }
  
      static String toDebugString(final byte[] bytes, final int len, final Charset charset) {
          if (charset == null) {
              return toDebugString(new String(bytes, 0, len, Charset.defaultCharset()));
          }
          return toDebugString(new String(bytes, 0, len, charset));
      }
  
      static String toDebugString(final String string) {
          if (string == null) {
              return "null";
          }
          final StringBuilder builder = new StringBuilder(string.length());
          for (int i = 0; i < string.length(); i++) {
              final char c = string.charAt(i);
              switch (c) {
                  case '\n': builder.append("\\n"); break;
                  case '\r': builder.append("\\r"); break;
                  default:
                      builder.append(c);
              }
              if (i > MAX_STRING_LENGTH) {
                  builder.append(" ... (");
                  builder.append(string.length() - i);
                  builder.append(" char more)");
                  break;
              }
          }
          return builder.toString();
      }
  
      static String toDebugString(final Object object) {
          return toDebugString(String.valueOf(object));
      }
  
      static void flushAppendable(final Appendable appendable) throws IOException {
          if (appendable instanceof Flushable) {
              ((Flushable) appendable).flush();
          }
      }
  }
  