com.blazebit.persistence.impl.transform.SizeSelectInfoTransformer Maven / Gradle / Ivy
/*
* Copyright 2014 - 2020 Blazebit.
*
* 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.blazebit.persistence.impl.transform;
import com.blazebit.persistence.impl.ClauseType;
import com.blazebit.persistence.impl.OrderByManager;
import com.blazebit.persistence.impl.SelectInfo;
import com.blazebit.persistence.parser.util.ExpressionUtils;
/**
*
* @author Christian Beikov
* @author Moritz Becker
* @since 1.2.0
*/
public class SizeSelectInfoTransformer implements ExpressionModifierVisitor {
private final OrderByManager orderByManager;
private final SizeTransformationVisitor sizeTransformationVisitor;
public SizeSelectInfoTransformer(SizeTransformationVisitor sizeTransformationVisitor, OrderByManager orderByManager) {
this.sizeTransformationVisitor = sizeTransformationVisitor;
this.orderByManager = orderByManager;
}
@Override
public void visit(SelectInfo info, ClauseType clauseType) {
sizeTransformationVisitor.setClause(clauseType);
sizeTransformationVisitor.setOrderBySelectClause(orderByManager.containsOrderBySelectAlias(info.getAlias()));
if (ExpressionUtils.isSizeFunction(info.getExpression())) {
sizeTransformationVisitor.visit(info);
} else {
info.getExpression().accept(sizeTransformationVisitor);
}
}
}