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package org.aksw.commons.util.slot;

/**
 * Interface where a whole is created from parts, whereas these parts
 * are requested from different contributors.
 *
 * Contributors request slots into which they can place a supplier for the part they wish to contribute.
 * Slots should be released via {@link Slot#close()}.
 *
 * The whole can be repeatedly assembled using {@link #build()} thereby reflecting the latest state of the parts.
 * During assembly null values on supplies and contributions are ignored.
 *
 * Thread safety depends on the implementation.
 *
 * @author raven
 *
 * @param  The type of the whole to be created
 * @param  The type of the parts that are contributed
 */
public interface SlottedBuilder
    extends SlotSource
{
    W build();
}