org.apache.hudi.expression.Expression Maven / Gradle / Ivy
/*
* 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.hudi.expression;
import org.apache.hudi.internal.schema.Type;
import java.io.Serializable;
import java.util.List;
public interface Expression extends Serializable {
enum Operator {
TRUE("TRUE", "TRUE"),
FALSE("FALSE", "FALSE"),
AND("AND", "&&"),
OR("OR", "||"),
GT(">", ">"),
LT("<", "<"),
EQ("=", "="),
GT_EQ(">=", ">="),
LT_EQ("<=", "<="),
STARTS_WITH(null, null),
CONTAINS(null, null),
IS_NULL(null, null),
IS_NOT_NULL(null, null),
IN("IN", "IN"),
NOT("NOT", "NOT");
public final String sqlOperator;
public final String symbol;
Operator(String sqlOperator, String symbol) {
this.sqlOperator = sqlOperator;
this.symbol = symbol;
}
}
List getChildren();
Type getDataType();
default Object eval(StructLike data) {
throw new UnsupportedOperationException("Cannot evaluate expression " + this);
}
/**
* Traverses the expression with the provided {@link ExpressionVisitor}
*/
T accept(ExpressionVisitor exprVisitor);
@Override
String toString();
}