com.facebook.presto.jdbc.internal.spi.relation.RowExpressionNodeInliner 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.relation;

import java.util.Map;

public class RowExpressionNodeInliner
        extends RowExpressionRewriter
{
    private final Map mappings;

    public static RowExpression replaceExpression(RowExpression expression, Map mappings)
    {
        return RowExpressionTreeRewriter.rewriteWith(new RowExpressionNodeInliner(mappings), expression);
    }

    public RowExpressionNodeInliner(Map mappings)
    {
        this.mappings = mappings;
    }

    @Override
    public RowExpression rewriteRowExpression(RowExpression node, Void context, RowExpressionTreeRewriter treeRewriter)
    {
        return mappings.get(node);
    }
}