package org.apache.samoa.learners;

/*
 * #%L
 * SAMOA
 * %%
 * Copyright (C) 2014 - 2015 Apache Software Foundation
 * %%
 * 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.Serializable;
import java.util.Set;

import org.apache.samoa.core.Processor;
import org.apache.samoa.instances.Instances;
import org.apache.samoa.topology.Stream;
import org.apache.samoa.topology.TopologyBuilder;

/**
 * The Interface Classifier. Initializing Classifier should initalize PI to connect the Classifier with the input stream
 * and initialize result stream so that other PI can connect to the classification result of this classifier
 */

public interface Learner extends Serializable {

  /**
   * Inits the Learner object.
   * 
   * @param topologyBuilder
   *          the topology builder
   * @param dataset
   *          the dataset
   * @param parallelism
   *          the parallelism
   */
  public void init(TopologyBuilder topologyBuilder, Instances dataset, int parallelism);

  /**
   * Gets the input processing item.
   * 
   * @return the input processing item
   */
  public Processor getInputProcessor();

  /**
   * Gets the result streams
   * 
   * @return the set of result streams
   */
  public Set<Stream> getResultStreams();
}