/*
 * Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
 *
 * 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.hazelcast.jet.sql.impl.opt.logical;

import com.hazelcast.jet.sql.impl.opt.OptUtils;
import org.apache.calcite.plan.Convention;
import org.apache.calcite.plan.RelOptRule;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.convert.ConverterRule;
import org.apache.calcite.rel.core.Filter;
import org.apache.calcite.rel.logical.LogicalFilter;

import static com.hazelcast.jet.sql.impl.opt.JetConventions.LOGICAL;

final class FilterLogicalRule extends ConverterRule {

    static final RelOptRule INSTANCE = new FilterLogicalRule();

    private FilterLogicalRule() {
        super(
                LogicalFilter.class, Convention.NONE, LOGICAL,
                FilterLogicalRule.class.getSimpleName()
        );
    }

    @Override
    public RelNode convert(RelNode rel) {
        Filter filter = (LogicalFilter) rel;

        return new FilterLogicalRel(
                filter.getCluster(),
                OptUtils.toLogicalConvention(filter.getTraitSet()),
                OptUtils.toLogicalInput(filter.getInput()),
                filter.getCondition()
        );
    }
}
