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package org.junit.rules;

import org.junit.runner.Description;
import org.junit.runners.model.Statement;

/**
 * Runs a collection of rules on a statement.
 *
 * @since 4.9
 */
public class RunRules extends Statement {
    private final Statement statement;

    public RunRules(Statement base, Iterable rules, Description description) {
        statement = applyAll(base, rules, description);
    }

    @Override
    public void evaluate() throws Throwable {
        statement.evaluate();
    }

    private static Statement applyAll(Statement result, Iterable rules,
            Description description) {
        for (TestRule each : rules) {
            result = each.apply(result, description);
        }
        return result;
    }
}