cayenne-server/src/main/java/org/apache/cayenne/map/EntitySorter.java

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package org.apache.cayenne.map;

import java.util.Comparator;
import java.util.List;

/**
 * Defines API for sorting of Cayenne entities based on their mutual dependencies.
 * 
 * @since 1.1
 */
public interface EntitySorter {

    /**
     * Sets EntityResolver for this sorter. All entities present in the resolver will be
     * used to determine sort ordering.
     * 
     * @since 3.1
     */
    void setEntityResolver(EntityResolver resolver);

    /**
     * Sorts a list of DbEntities.
     */
    void sortDbEntities(List<DbEntity> dbEntities, boolean deleteOrder);

    /**
     * Sorts a list of ObjEntities.
     */
    void sortObjEntities(List<ObjEntity> objEntities, boolean deleteOrder);

    /**
     * Sorts a list of objects belonging to the ObjEntity.
     */
    void sortObjectsForEntity(ObjEntity entity, List<?> objects, boolean deleteOrder);

    /**
     * @return comparator for {@link DbEntity}
     * @since 4.2
     */
    Comparator<DbEntity> getDbEntityComparator();

    /**
     * @return comparator for {@link ObjEntity}
     * @since 4.2
     */
    Comparator<ObjEntity> getObjEntityComparator();

    /**
     * @param entity to check
     * @return is entity has reflexive relationships
     *
     * @since 4.2
     */
    boolean isReflexive(DbEntity entity);
}