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Chefling is a very minimal dependency injection container written in pure Java.

There is a newer version: 7.1.1

package com.cookingfox.chefling.impl.helper;

import com.cookingfox.chefling.impl.command.CommandContainer;

/**
 * Interface for matching a collection of {@link CommandContainer} instances. Can be used to find
 * one element in a composite tree of containers.
 */
public interface CommandContainerMatcher {

    /**
     * Specify a condition to match the container instance.
     *
     * @param container Current container instance.
     * @return Result to indicate whether the container matches the condition.
     */
    boolean matches(CommandContainer container);

}