com.facebook.presto.jdbc.internal.jol.datamodel.DataModel Maven / Gradle / Ivy

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package com.facebook.presto.jdbc.internal.jol.datamodel;

/**
 * Describes the data model, notably,
 * the basic types sizes.
 *
 * @author Aleksey Shipilev
 */
public interface DataModel {

    /**
     * Return the object header size.
     *
     * @return object header size in bytes.
     */
    int headerSize();

    /**
     * Return the size of the type.
     *
     * @param klass string representation of the type.
     * @return size in bytes.
     */
    int sizeOf(String klass);
}