com.facebook.presto.jdbc.internal.spi.plan.CteReferenceNode Maven / Gradle / Ivy

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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.jdbc.internal.spi.plan;

import com.facebook.presto.jdbc.internal.spi.SourceLocation;
import com.facebook.presto.jdbc.internal.spi.relation.VariableReferenceExpression;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonCreator;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonProperty;

import com.facebook.presto.jdbc.internal.javax.annotation.concurrent.Immutable;

import java.util.List;
import java.util.Optional;

import static java.util.Collections.singletonList;
import static java.util.Objects.requireNonNull;

@Immutable
public final class CteReferenceNode
        extends PlanNode
{
    private final PlanNode source;
    private final String cteId;

    @JsonCreator
    public CteReferenceNode(
            Optional sourceLocation,
            @JsonProperty("id") PlanNodeId id,
            @JsonProperty("source") PlanNode source,
            @JsonProperty("cteName") String cteId)
    {
        this(sourceLocation, id, Optional.empty(), source, cteId);
    }

    public CteReferenceNode(
            Optional sourceLocation,
            PlanNodeId id,
            Optional statsEquivalentPlanNode,
            PlanNode source,
            String cteId)
    {
        super(sourceLocation, id, statsEquivalentPlanNode);
        this.cteId = requireNonNull(cteId, "cteName must not be null");
        this.source = requireNonNull(source, "source must not be null");
    }

    @Override
    public List getSources()
    {
        return singletonList(source);
    }

    @JsonProperty
    public PlanNode getSource()
    {
        return source;
    }

    @Override
    public List getOutputVariables()
    {
        return source.getOutputVariables();
    }

    @Override
    public PlanNode replaceChildren(List newChildren)
    {
        requireNonNull(newChildren, "newChildren is null");
        checkArgument(newChildren.size() == 1, "expected newChildren to contain 1 node");
        return new CteReferenceNode(newChildren.get(0).getSourceLocation(), getId(), getStatsEquivalentPlanNode(), newChildren.get(0), cteId);
    }

    @Override
    public PlanNode assignStatsEquivalentPlanNode(Optional statsEquivalentPlanNode)
    {
        return new CteReferenceNode(getSourceLocation(), getId(), statsEquivalentPlanNode, source, cteId);
    }

    @Override
    public  R accept(PlanVisitor visitor, C context)
    {
        return visitor.visitCteReference(this, context);
    }

    public String getCteId()
    {
        return cteId;
    }

    private static void checkArgument(boolean condition, String message)
    {
        if (!condition) {
            throw new IllegalArgumentException(message);
        }
    }
}