/*
 *
 *  * Copyright (c) 2011-2015 EPFL DATA Laboratory
 *  * Copyright (c) 2014-2015 The Squall Collaboration (see NOTICE)
 *  *
 *  * 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 ch.epfl.data.squall.examples.imperative.shj;

import ch.epfl.data.squall.components.Component;
import ch.epfl.data.squall.components.DataSourceComponent;
import ch.epfl.data.squall.components.EquiJoinComponent;
import ch.epfl.data.squall.expressions.ColumnReference;
import ch.epfl.data.squall.operators.AggregateCountOperator;
import ch.epfl.data.squall.operators.ProjectOperator;
import ch.epfl.data.squall.predicates.ComparisonPredicate;
import ch.epfl.data.squall.query_plans.QueryPlan;
import ch.epfl.data.squall.types.IntegerType;

import java.util.Map;

public class HyracksPredicatePlan extends QueryPlan {

    public HyracksPredicatePlan(String dataPath, String extension, Map conf) {
        super(dataPath, extension, conf);
    }

    private static final IntegerType _ic = new IntegerType();

    @Override
    public Component createQueryPlan(String dataPath, String extension, Map conf) {
        // -------------------------------------------------------------------------------------
        Component customer = new DataSourceComponent("customer", conf)
                .add(new ProjectOperator(0, 6)).setOutputPartKey(0);

        // -------------------------------------------------------------------------------------
        Component orders = new DataSourceComponent("orders", conf)
                .add(new ProjectOperator(1)).setOutputPartKey(0);

        final ColumnReference colCustomer = new ColumnReference(_ic, 0);
        final ColumnReference colOrders = new ColumnReference(_ic, 0);
        final ComparisonPredicate comp = new ComparisonPredicate(
                ComparisonPredicate.EQUAL_OP, colCustomer, colOrders);
        // -------------------------------------------------------------------------------------
        Component custOrders = new EquiJoinComponent(customer, orders).setJoinPredicate(comp)
                .add(new AggregateCountOperator(conf).setGroupByColumns(1));

        return custOrders;
        // -------------------------------------------------------------------------------------
    }
}