org.apache.calcite.rel.mutable.MutableMultiRel.java Source code

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Here is the source code for org.apache.calcite.rel.mutable.MutableMultiRel.java

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/*
 * 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.calcite.rel.mutable;

import org.apache.calcite.linq4j.Ord;
import org.apache.calcite.plan.RelOptCluster;
import org.apache.calcite.rel.type.RelDataType;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;

import java.util.List;

/** Base Class for relations with three or more inputs */
abstract class MutableMultiRel extends MutableRel {
    protected final List<MutableRel> inputs;

    protected MutableMultiRel(RelOptCluster cluster, RelDataType rowType, MutableRelType type,
            List<MutableRel> inputs) {
        super(cluster, rowType, type);
        this.inputs = ImmutableList.copyOf(inputs);
        for (Ord<MutableRel> input : Ord.zip(inputs)) {
            input.e.parent = this;
            input.e.ordinalInParent = input.i;
        }
    }

    @Override
    public void setInput(int ordinalInParent, MutableRel input) {
        inputs.set(ordinalInParent, input);
        if (input != null) {
            input.parent = this;
            input.ordinalInParent = ordinalInParent;
        }
    }

    @Override
    public List<MutableRel> getInputs() {
        return inputs;
    }

    @Override
    public void childrenAccept(MutableRelVisitor visitor) {
        for (MutableRel input : inputs) {
            visitor.visit(input);
        }
    }

    protected List<MutableRel> cloneChildren() {
        return Lists.transform(inputs, new Function<MutableRel, MutableRel>() {
            public MutableRel apply(MutableRel mutableRel) {
                return mutableRel.clone();
            }
        });
    }
}

// End MutableMultiRel.java