/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.phoenix.execute.visitor;

import org.apache.phoenix.compile.ListJarsQueryPlan;
import org.apache.phoenix.compile.QueryPlan;
import org.apache.phoenix.compile.TraceQueryPlan;
import org.apache.phoenix.execute.*;

/**
 *
 * Visitor for a QueryPlan (which may contain other nested query-plans)
 *
 */
public interface QueryPlanVisitor<E> {
    E defaultReturn(QueryPlan plan);
    E visit(AggregatePlan plan);
    E visit(ScanPlan plan);
    E visit(ClientAggregatePlan plan);
    E visit(ClientScanPlan plan);
    E visit(LiteralResultIterationPlan plan);
    E visit(TupleProjectionPlan plan);
    E visit(HashJoinPlan plan);
    E visit(SortMergeJoinPlan plan);
    E visit(UnionPlan plan);
    E visit(UnnestArrayPlan plan);
    E visit(CursorFetchPlan plan);
    E visit(ListJarsQueryPlan plan);
    E visit(TraceQueryPlan plan);
}
