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com.blazebit.persistence.impl.builder.expression.CaseWhenOrThenBuilderImpl 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.builder.expression;
import com.blazebit.persistence.CaseWhenAndBuilder;
import com.blazebit.persistence.CaseWhenBuilder;
import com.blazebit.persistence.CaseWhenOrThenBuilder;
import com.blazebit.persistence.FullQueryBuilder;
import com.blazebit.persistence.MultipleSubqueryInitiator;
import com.blazebit.persistence.RestrictionBuilder;
import com.blazebit.persistence.SubqueryBuilder;
import com.blazebit.persistence.SubqueryInitiator;
import com.blazebit.persistence.impl.ClauseType;
import com.blazebit.persistence.impl.MultipleSubqueryInitiatorImpl;
import com.blazebit.persistence.impl.ParameterManager;
import com.blazebit.persistence.impl.SubqueryBuilderListenerImpl;
import com.blazebit.persistence.impl.SubqueryInitiatorFactory;
import com.blazebit.persistence.impl.builder.predicate.LeftHandsideSubqueryPredicateBuilderListener;
import com.blazebit.persistence.impl.builder.predicate.PredicateBuilderEndedListenerImpl;
import com.blazebit.persistence.impl.builder.predicate.RestrictionBuilderImpl;
import com.blazebit.persistence.impl.builder.predicate.RightHandsideSubqueryPredicateBuilder;
import com.blazebit.persistence.impl.builder.predicate.SuperExpressionLeftHandsideSubqueryPredicateBuilder;
import com.blazebit.persistence.parser.expression.Expression;
import com.blazebit.persistence.parser.expression.ExpressionFactory;
import com.blazebit.persistence.parser.expression.WhenClauseExpression;
import com.blazebit.persistence.parser.predicate.CompoundPredicate;
import com.blazebit.persistence.parser.predicate.ExistsPredicate;
import com.blazebit.persistence.parser.predicate.PredicateBuilder;
import com.blazebit.persistence.parser.util.TypeUtils;
/**
*
* @author Christian Beikov
* @author Moritz Becker
* @since 1.0.0
*/
public class CaseWhenOrThenBuilderImpl> extends PredicateBuilderEndedListenerImpl implements CaseWhenOrThenBuilder, ExpressionBuilder {
private final T result;
private final SubqueryInitiatorFactory subqueryInitFactory;
private final ExpressionFactory expressionFactory;
private final ParameterManager parameterManager;
private final ClauseType clauseType;
private final CompoundPredicate predicate = new CompoundPredicate(CompoundPredicate.BooleanOperator.OR);
private final ExpressionBuilderEndedListener listener;
@SuppressWarnings({ "unchecked", "rawtypes" })
private final SubqueryBuilderListenerImpl>> leftSubqueryPredicateBuilderListener = new LeftHandsideSubqueryPredicateBuilderListener();
private WhenClauseExpression whenClause;
public CaseWhenOrThenBuilderImpl(T result, ExpressionBuilderEndedListener listener, SubqueryInitiatorFactory subqueryInitFactory, ExpressionFactory expressionFactory, ParameterManager parameterManager, ClauseType clauseType) {
this.result = result;
this.subqueryInitFactory = subqueryInitFactory;
this.expressionFactory = expressionFactory;
this.parameterManager = parameterManager;
this.listener = listener;
this.clauseType = clauseType;
}
@Override
public RestrictionBuilder> or(String expression) {
Expression expr = expressionFactory.createSimpleExpression(expression, false);
return startBuilder(new RestrictionBuilderImpl>(this, this, expr, subqueryInitFactory, expressionFactory, parameterManager, clauseType));
}
@Override
public SubqueryInitiator>> orSubquery() {
RestrictionBuilder> restrictionBuilder = startBuilder(new RestrictionBuilderImpl>(this, this, subqueryInitFactory, expressionFactory, parameterManager, clauseType));
return subqueryInitFactory.createSubqueryInitiator(restrictionBuilder, leftSubqueryPredicateBuilderListener, false, clauseType);
}
@Override
public SubqueryInitiator>> orSubquery(String subqueryAlias, String expression) {
@SuppressWarnings({ "rawtypes", "unchecked" })
SubqueryBuilderListenerImpl>> superExprLeftSubqueryPredicateBuilderListener = new SuperExpressionLeftHandsideSubqueryPredicateBuilder(subqueryAlias, expressionFactory.createSimpleExpression(expression, true));
RestrictionBuilder> restrictionBuilder = startBuilder(new RestrictionBuilderImpl>(this, this, subqueryInitFactory, expressionFactory, parameterManager, clauseType));
return subqueryInitFactory.createSubqueryInitiator(restrictionBuilder, superExprLeftSubqueryPredicateBuilderListener, false, clauseType);
}
@Override
public SubqueryBuilder>> orSubquery(FullQueryBuilder criteriaBuilder) {
RestrictionBuilder> restrictionBuilder = startBuilder(new RestrictionBuilderImpl>(this, this, subqueryInitFactory, expressionFactory, parameterManager, clauseType));
return subqueryInitFactory.createSubqueryBuilder(restrictionBuilder, leftSubqueryPredicateBuilderListener, false, criteriaBuilder, clauseType);
}
@Override
public SubqueryBuilder>> orSubquery(String subqueryAlias, String expression, FullQueryBuilder criteriaBuilder) {
@SuppressWarnings({ "rawtypes", "unchecked" })
SubqueryBuilderListenerImpl>> superExprLeftSubqueryPredicateBuilderListener = new SuperExpressionLeftHandsideSubqueryPredicateBuilder(subqueryAlias, expressionFactory.createSimpleExpression(expression, true));
RestrictionBuilder> restrictionBuilder = startBuilder(new RestrictionBuilderImpl>(this, this, subqueryInitFactory, expressionFactory, parameterManager, clauseType));
return subqueryInitFactory.createSubqueryBuilder(restrictionBuilder, superExprLeftSubqueryPredicateBuilderListener, false, criteriaBuilder, clauseType);
}
@Override
public MultipleSubqueryInitiator>> orSubqueries(String expression) {
return startMultipleSubqueryInitiator(expressionFactory.createSimpleExpression(expression));
}
private MultipleSubqueryInitiator>> startMultipleSubqueryInitiator(Expression expression) {
verifyBuilderEnded();
RestrictionBuilder> restrictionBuilder = startBuilder(new RestrictionBuilderImpl>(this, this, subqueryInitFactory, expressionFactory, parameterManager, clauseType));
// We don't need a listener or marker here, because the resulting restriction builder can only be ended, when the initiator is ended
MultipleSubqueryInitiator>> initiator = new MultipleSubqueryInitiatorImpl>>(restrictionBuilder, expression, null, subqueryInitFactory, clauseType);
return initiator;
}
@Override
public SubqueryInitiator> orExists() {
SubqueryBuilderListenerImpl> rightSubqueryPredicateBuilderListener = startBuilder(new RightHandsideSubqueryPredicateBuilder>(this, new ExistsPredicate()));
return subqueryInitFactory.createSubqueryInitiator((CaseWhenOrThenBuilder) this, rightSubqueryPredicateBuilderListener, true, clauseType);
}
@Override
public SubqueryInitiator> orNotExists() {
SubqueryBuilderListenerImpl> rightSubqueryPredicateBuilderListener = startBuilder(new RightHandsideSubqueryPredicateBuilder>(this, new ExistsPredicate(true)));
return subqueryInitFactory.createSubqueryInitiator((CaseWhenOrThenBuilder) this, rightSubqueryPredicateBuilderListener, true, clauseType);
}
@Override
public SubqueryBuilder> orExists(FullQueryBuilder criteriaBuilder) {
SubqueryBuilderListenerImpl> rightSubqueryPredicateBuilderListener = startBuilder(new RightHandsideSubqueryPredicateBuilder>(this, new ExistsPredicate()));
return subqueryInitFactory.createSubqueryBuilder((CaseWhenOrThenBuilder) this, rightSubqueryPredicateBuilderListener, true, criteriaBuilder, clauseType);
}
@Override
public SubqueryBuilder> orNotExists(FullQueryBuilder criteriaBuilder) {
SubqueryBuilderListenerImpl> rightSubqueryPredicateBuilderListener = startBuilder(new RightHandsideSubqueryPredicateBuilder>(this, new ExistsPredicate(true)));
return subqueryInitFactory.createSubqueryBuilder((CaseWhenOrThenBuilder) this, rightSubqueryPredicateBuilderListener, true, criteriaBuilder, clauseType);
}
@Override
public CaseWhenAndBuilder> and() {
return startBuilder(new CaseWhenAndBuilderImpl>(this, this, subqueryInitFactory, expressionFactory, parameterManager, clauseType));
}
@Override
public T thenExpression(String expression) {
verifyBuilderEnded();
if (predicate.getChildren().isEmpty()) {
throw new IllegalStateException("No or clauses specified!");
}
if (whenClause != null) {
throw new IllegalStateException("Method then/thenExpression called multiple times");
}
whenClause = new WhenClauseExpression(predicate, expressionFactory.createSimpleExpression(expression, false));
listener.onBuilderEnded(this);
return result;
}
@Override
public T thenLiteral(Object value) {
verifyBuilderEnded();
if (predicate.getChildren().isEmpty()) {
throw new IllegalStateException("No and clauses specified!");
}
if (whenClause != null) {
throw new IllegalStateException("Method then/thenExpression called multiple times");
}
String literal = TypeUtils.asLiteral(value, subqueryInitFactory.getQueryBuilder().getMetamodel().getEnumTypes().keySet());
if (literal == null) {
return then(value);
}
whenClause = new WhenClauseExpression(predicate, expressionFactory.createInItemExpression(literal));
listener.onBuilderEnded(this);
return result;
}
@Override
public T then(Object value) {
verifyBuilderEnded();
if (predicate.getChildren().isEmpty()) {
throw new IllegalStateException("No or clauses specified!");
}
if (whenClause != null) {
throw new IllegalStateException("Method then/thenExpression called multiple times");
}
whenClause = new WhenClauseExpression(predicate, parameterManager.addParameterExpression(value, clauseType, subqueryInitFactory.getQueryBuilder()));
listener.onBuilderEnded(this);
return result;
}
@Override
public void onBuilderEnded(PredicateBuilder builder) {
super.onBuilderEnded(builder);
predicate.getChildren().add(builder.getPredicate());
}
@Override
public Expression getExpression() {
return whenClause;
}
}