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/*
* 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;
import com.blazebit.persistence.BaseDeleteCriteriaBuilder;
import com.blazebit.persistence.parser.expression.ExpressionCopyContext;
import com.blazebit.persistence.spi.DbmsStatementType;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
*
* @param The query result type
* @author Christian Beikov
* @since 1.1.0
*/
public abstract class BaseDeleteCriteriaBuilderImpl, Y> extends AbstractModificationCriteriaBuilder implements BaseDeleteCriteriaBuilder {
public BaseDeleteCriteriaBuilderImpl(MainQuery mainQuery, QueryContext queryContext, boolean isMainQuery, Class clazz, String alias, CTEManager.CTEKey cteKey, Class cteClass, Y result, CTEBuilderListener listener) {
super(mainQuery, queryContext, isMainQuery, DbmsStatementType.DELETE, clazz, alias, cteKey, cteClass, result, listener);
}
public BaseDeleteCriteriaBuilderImpl(AbstractModificationCriteriaBuilder builder, MainQuery mainQuery, QueryContext queryContext, Map joinManagerMapping, ExpressionCopyContext copyContext) {
super(builder, mainQuery, queryContext, joinManagerMapping, copyContext);
}
@Override
protected void buildBaseQueryString(StringBuilder sbSelectFrom, boolean externalRepresentation, JoinNode lateralJoinNode) {
sbSelectFrom.append("DELETE FROM ");
sbSelectFrom.append(entityType.getName()).append(' ');
sbSelectFrom.append(entityAlias);
JoinNode rootNode = joinManager.getRoots().get(0);
if (joinManager.getRoots().size() > 1 || rootNode.hasChildNodes()) {
sbSelectFrom.append(" WHERE EXISTS (SELECT 1");
List whereClauseConjuncts = new ArrayList<>();
List optionalWhereClauseConjuncts = new ArrayList<>();
joinManager.buildClause(sbSelectFrom, Collections.emptySet(), null, false, externalRepresentation, false, false, optionalWhereClauseConjuncts, whereClauseConjuncts, explicitVersionEntities, nodesToFetch, Collections.emptySet(), rootNode);
appendWhereClause(sbSelectFrom, externalRepresentation);
sbSelectFrom.append(')');
} else {
appendWhereClause(sbSelectFrom, externalRepresentation);
}
}
}