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package org.nd4j.linalg.compression;

import org.nd4j.linalg.api.ndarray.INDArray;

/**
 * This interface describes basic Key-Value storage, where Key is any object, and Value is INDArray located "somewhere else"
 *
 *
 * @author [email protected]
 */
public interface AbstractStorage {

    /**
     * Store object into storage
     *
     * @param key
     * @param object
     */
    void store(T key, INDArray object);

    /**
     * Store object into storage
     *
     * @param key
     * @param array
     */
    void store(T key, float[] array);

    /**
     * Store object into storage
     *
     * @param key
     * @param array
     */
    void store(T key, double[] array);

    /**
     * Store object into storage, if it doesn't exist
     *  @param key
     * @param object
     */
    boolean storeIfAbsent(T key, INDArray object);

    /**
     * Get object from the storage, by key
     *
     * @param key
     */
    INDArray get(T key);

    /**
     * This method checks, if storage contains specified key
     *
     * @param key
     * @return
     */
    boolean containsKey(T key);

    /**
     * This method purges everything from storage
     */
    void clear();


    /**
     * This method removes value by specified key
     */
    void drop(T key);

    /**
     * This method returns number of entries available in storage
     */
    long size();
}




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