subprojects/store-query/src/main/java/tools/refinery/store/query/substitution/RenewingSubstitution.java


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package tools.refinery.store.query.substitution;

import tools.refinery.store.query.Variable;

import java.util.HashMap;
import java.util.Map;

public class RenewingSubstitution implements Substitution {
	private final Map<Variable, Variable> alreadyRenewed = new HashMap<>();

	@Override
	public Variable getSubstitute(Variable variable) {
		return alreadyRenewed.computeIfAbsent(variable, RenewingSubstitution::renew);
	}

	private static Variable renew(Variable variable) {
		return variable.isExplicitlyNamed() ? new Variable(variable.getName()) : new Variable();
	}
}