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DataKernel has an extremely lightweight DI with ground-breaking design principles. It supports nested scopes, singletons, object factories, modules and plugins which allow to transform graph of dependencies at startup time without any reflection.

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package io.datakernel.di.util;

import io.datakernel.di.core.Binding;
import io.datakernel.di.core.BindingType;

import static io.datakernel.di.core.BindingType.EAGER;
import static io.datakernel.di.core.BindingType.TRANSIENT;

/**
 * A container that groups together a bindings and its type, only for internal use
 */
public final class MarkedBinding {
	private final Binding binding;
	private final BindingType type;

	public MarkedBinding(Binding binding, BindingType type) {
		this.binding = binding;
		this.type = type;
	}

	public Binding getBinding() {
		return binding;
	}

	public BindingType getType() {
		return type;
	}

	@Override
	public String toString() {
		return (type == TRANSIENT ? "*" : type == EAGER ? "!" : "") + binding.toString();
	}
}