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 *  * This program and the accompanying materials are made available under the
 *  * terms of the Apache License, Version 2.0 which is available at
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 *  *  information regarding copyright ownership.
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package org.deeplearning4j.earlystopping.termination;


import org.nd4j.shade.jackson.annotation.JsonInclude;
import org.nd4j.shade.jackson.annotation.JsonSubTypes;
import org.nd4j.shade.jackson.annotation.JsonTypeInfo;

import java.io.Serializable;

@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY, property = "@class")
@JsonInclude(JsonInclude.Include.NON_NULL)
public interface EpochTerminationCondition extends Serializable {

    /** Initialize the epoch termination condition (often a no-op)*/
    void initialize();

    /**Should the early stopping training terminate at this epoch, based on the calculated score and the epoch number?
     * Returns true if training should terminated, or false otherwise
     * @param epochNum Number of the last completed epoch (starting at 0)
     * @param score Score calculate for this epoch
     * @return Whether training should be terminated at this epoch
     */
    boolean terminate(int epochNum, double score, boolean minimize);

}
