content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.ambari.server.utils;
  
  import java.util.stream.Stream;
  
  /**
   * Utilities for Streams
   */
  public class StreamUtils {
  
    /**
     * Filters a stream for instances of a class and returns a typed stream
     * @param stream the stream to filter
     * @param clazz stream will be filtered to instances of this class
     * @param <T> the type of the class
     * @return A stream of containing only instances of {@link T}
     */
    public static <T> Stream<T> instancesOf(Stream<?> stream, Class<? extends T> clazz) {
      return stream.filter(clazz::isInstance).map(clazz::cast);
    }
  
  }
  