content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.util.webui;
  
  import alluxio.wire.WorkerInfo;
  
  import java.util.Arrays;
  import java.util.Collection;
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * The type Web utils.
   */
  @ThreadSafe
  public final class WebUtils {
    /**
     * Converts a byte array to string.
     *
     * @param data byte array
     * @param offset offset
     * @param length number of bytes to encode
     * @return string representation of the encoded byte sub-array
     */
    public static String convertByteArrayToStringWithoutEscape(byte[] data, int offset, int length) {
      StringBuilder sb = new StringBuilder(length);
      for (int i = offset; i < length && i < data.length; i++) {
        sb.append((char) data[i]);
      }
      return sb.toString();
    }
  
    /**
     * Order the nodes by hostName and generate {@link NodeInfo} list for UI display.
     *
     * @param workerInfos the list of {@link WorkerInfo} objects
     * @return the list of {@link NodeInfo} objects
     */
    public static NodeInfo[] generateOrderedNodeInfos(Collection<WorkerInfo> workerInfos) {
      NodeInfo[] ret = new NodeInfo[workerInfos.size()];
      int index = 0;
      for (WorkerInfo workerInfo : workerInfos) {
        ret[index++] = new NodeInfo(workerInfo);
      }
      Arrays.sort(ret);
  
      return ret;
    }
  
    private WebUtils() {} // prevent instantiation
  }
  