/*
 * Copyright 2019-2021 The Polypheny Project
 *
 * 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.
 *
 * This file incorporates code covered by the following terms:
 *
 * 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,
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package org.polypheny.db.tools;


import org.polypheny.db.algebra.core.AlgFactories;
import org.polypheny.db.plan.AlgOptCluster;
import org.polypheny.db.plan.AlgOptRule;
import org.polypheny.db.plan.AlgOptSchema;


/**
 * A partially-created AlgBuilder.
 * <p>
 * Add a cluster, and optionally a schema, when you want to create a builder.
 * <p>
 * A {@code ProtoAlgBuilder} can be shared among queries, and thus can be inside a {@link AlgOptRule}. It is a nice way to
 * encapsulate the policy that this particular rule instance should create {@code DrillFilter} and {@code DrillProject}
 * versus {@code HiveFilter} and {@code HiveProject}.
 *
 * @see AlgFactories#LOGICAL_BUILDER
 */
public interface AlgBuilderFactory {

    /**
     * Creates a AlgBuilder.
     */
    AlgBuilder create( AlgOptCluster cluster, AlgOptSchema schema );

}

