io.trino.sql.planner.ReferenceAwareExpressionNodeInliner Maven / Gradle / Ivy
/*
* 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 io.trino.sql.planner;
import com.google.common.collect.ImmutableMap;
import io.trino.sql.tree.Expression;
import io.trino.sql.tree.ExpressionRewriter;
import io.trino.sql.tree.ExpressionTreeRewriter;
import io.trino.sql.tree.NodeRef;
import java.util.Map;
import static java.util.Objects.requireNonNull;
public class ReferenceAwareExpressionNodeInliner
extends ExpressionRewriter
{
public static Expression replaceExpression(Expression expression, Map, Expression> mappings)
{
return ExpressionTreeRewriter.rewriteWith(new ReferenceAwareExpressionNodeInliner(mappings), expression);
}
private final Map, Expression> mappings;
private ReferenceAwareExpressionNodeInliner(Map, Expression> mappings)
{
this.mappings = ImmutableMap.copyOf(requireNonNull(mappings, "mappings is null"));
}
@Override
protected Expression rewriteExpression(Expression node, Void context, ExpressionTreeRewriter treeRewriter)
{
return mappings.get(NodeRef.of(node));
}
}