/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.facebook.presto.sql.planner.iterative.rule;

import com.facebook.presto.matching.Captures;
import com.facebook.presto.matching.Pattern;
import com.facebook.presto.sql.planner.iterative.Rule;
import com.facebook.presto.sql.planner.plan.ExchangeNode;
import com.facebook.presto.sql.planner.plan.PlanNode;

import static com.facebook.presto.sql.planner.plan.Patterns.exchange;
import static java.util.Objects.requireNonNull;

public final class PreconditionRules
{
    private PreconditionRules() {}

    public static Rule<ExchangeNode> checkRulesAreFiredBeforeAddExchangesRule()
    {
        return checkPlanDoNotMatch(exchange(), "Expected rules to be fired before 'AddExchanges' optimizer");
    }

    public static <T extends PlanNode> Rule<T> checkPlanDoNotMatch(Pattern<T> pattern, String message)
    {
        requireNonNull(pattern, "pattern is null");
        requireNonNull(message, "message is null");

        return new Rule<T>() {
            @Override
            public Pattern<T> getPattern()
            {
                return pattern;
            }

            @Override
            public Result apply(T node, Captures captures, Context context)
            {
                throw new IllegalStateException(message);
            }
        };
    }
}
