/*
 * 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.samoa.streams;

import org.apache.samoa.instances.Instance;
import org.apache.samoa.moa.core.Example;

/**
 * The Class StreamSource.
 */
public class StreamSource implements java.io.Serializable {

  /**
	 * 
	 */
  private static final long serialVersionUID = 3974668694861231236L;

  /**
   * Instantiates a new stream source.
   * 
   * @param stream
   *          the stream
   */
  public StreamSource(InstanceStream stream) {
    super();
    this.stream = stream;
  }

  /** The stream. */
  protected InstanceStream stream;

  /**
   * Gets the stream.
   * 
   * @return the stream
   */
  public InstanceStream getStream() {
    return stream;
  }

  /**
   * Next instance.
   * 
   * @return the instance
   */
  public Example<Instance> nextInstance() {
    return stream.nextInstance();
  }

  /**
   * Sets the stream.
   * 
   * @param stream
   *          the new stream
   */
  public void setStream(InstanceStream stream) {
    this.stream = stream;
  }

  /**
   * Checks for more instances.
   * 
   * @return true, if successful
   */
  public boolean hasMoreInstances() {
    return this.stream.hasMoreInstances();
  }

}