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A very fast POJO codec for MongoDB (used in conjunction with the Mongo Java Driver) that handles generic types as well as polymorphic class hierarchies

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package de.bild.codec;

/**
 * IdGenerator that has no need to generate ids based on instance internals
 */
public interface IdGenerator extends InstanceAwareIdGenerator {

    @Override
    default T generate(Object instance) {
        return generate();
    }

    /**
     * Generate id without knowledge of the instance
     * @return a new id
     */
    T generate();
}