com.facebook.presto.sql.planner.SubPlanBuilder.java Source code

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Here is the source code for com.facebook.presto.sql.planner.SubPlanBuilder.java

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/*
 * 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;

import com.facebook.presto.sql.planner.plan.PlanFragmentId;
import com.facebook.presto.sql.planner.plan.PlanNode;
import com.facebook.presto.sql.planner.plan.PlanNodeId;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import static com.google.common.base.Predicates.in;

public class SubPlanBuilder {
    private final PlanFragmentId id;
    private PlanNode root;
    private PlanNodeId partitionedSource;
    private List<SubPlan> children = new ArrayList<>();

    private final SymbolAllocator allocator;

    public SubPlanBuilder(PlanFragmentId id, SymbolAllocator allocator, PlanNode root) {
        Preconditions.checkNotNull(id, "id is null");
        Preconditions.checkNotNull(allocator, "allocator is null");
        Preconditions.checkNotNull(root, "root is null");

        this.allocator = allocator;
        this.id = id;
        this.root = root;
    }

    public PlanFragmentId getId() {
        return id;
    }

    public PlanNode getRoot() {
        return root;
    }

    public SubPlanBuilder setRoot(PlanNode root) {
        Preconditions.checkNotNull(root, "root is null");
        this.root = root;
        return this;
    }

    public boolean isPartitioned() {
        return partitionedSource != null;
    }

    public PlanNodeId getPartitionedSource() {
        return partitionedSource;
    }

    public SubPlanBuilder setPartitionedSource(PlanNodeId partitionedSource) {
        this.partitionedSource = partitionedSource;
        return this;
    }

    public SubPlanBuilder setUnpartitionedSource() {
        this.partitionedSource = null;
        return this;
    }

    public List<SubPlan> getChildren() {
        return children;
    }

    public SubPlanBuilder setChildren(Iterable<SubPlan> children) {
        this.children = Lists.newArrayList(children);
        return this;
    }

    public SubPlanBuilder addChild(SubPlan child) {
        this.children.add(child);
        return this;
    }

    public SubPlan build() {
        Set<Symbol> dependencies = SymbolExtractor.extract(root);

        PlanFragment fragment = new PlanFragment(id, partitionedSource,
                Maps.filterKeys(allocator.getTypes(), in(dependencies)), root);

        return new SubPlan(fragment, children);
    }
}