package org.apache.samoa.instances;

/*
 * #%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%
 */

public interface Prediction {

  /**
   * Number of output attributes.
   *
   * @return the number of output attributes
   */
  public int numOutputAttributes();

  /**
   * Different output attributes may have different number of classes.
   * Regressors have one class per output attribute.
   *
   * @return the number of classes for attribute attributeIndex
   */
  public int numClasses(int outputAttributeIndex);

  /*
   * The predictions for each output attribute.
   *
   * @return the classes for each output attribute
   *//*
	public double [] getPrediction();
    */

  /**
   * The votes for a given output attribute
   *
   * @return the votes for a given output attribute outputAttributeIndex.
   */
  public double [] getVotes(int outputAttributeIndex);

  /**
   * The vote assigned to a class of an output attribute
   *
   * @return the vote for an output attribute outputAttributeIndex and a class classIndex.
   */
  public double getVote(int outputAttributeIndex, int classIndex);

  /**
   * Sets the votes for a given output attribute
   *
   */
  public void setVotes(int outputAttributeIndex, double [] votes);

  /**
   * Sets the votes for the first output attribute
   *
   */
  public void setVotes(double[] votes);

  /**
   * Sets the vote for class of a given output attribute
   *
   */
  public void setVote(int outputAttributeIndex, int classIndex, double vote);

  /**
   * The votes for the first output attribute
   *
   * @return the votes for the first output attribute outputAttributeIndex.
   */
  double[] getVotes();

  /**
   * Checks if there are votes for a given output attribute
   *
   * @return the votes for the first output attribute outputAttributeIndex.
   */
  boolean hasVotesForAttribute(int outputAttributeIndex);


  /**
   * The size of the prediction, that is the number of output attributes
   *
   * @return the votes for the first output attribute outputAttributeIndex.
   */
  public int size();

  /**
   * The text of the prediction, that is the description of the values of the prediction
   *
   * @return the text
   */
  public String toString();


}