spring-data-jpa HibernateJpaParametersParameterAccessor 源码
spring-data-jpa HibernateJpaParametersParameterAccessor 代码
文件路径：/spring-data-jpa/src/main/java/org/springframework/data/jpa/provider/HibernateJpaParametersParameterAccessor.java
/*
* Copyright 2022 the original author or authors.
*
* 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
*
* https://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.springframework.data.jpa.provider;
import jakarta.persistence.EntityManager;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.query.TypedParameterValue;
import org.hibernate.type.BasicTypeRegistry;
import org.springframework.data.jpa.repository.query.JpaParametersParameterAccessor;
import org.springframework.data.repository.query.Parameter;
import org.springframework.data.repository.query.Parameters;
import org.springframework.data.repository.query.ParametersParameterAccessor;
import org.springframework.lang.Nullable;
/**
* {@link org.springframework.data.repository.query.ParameterAccessor} based on an {@link Parameters} instance. In
* addition to the {@link JpaParametersParameterAccessor} functions, the bindable value is provided by fetching the
* method type when there is null.
*
* @author Wonchul Heo
* @author Jens Schauder
* @author Cedomir Igaly
* @author Robert Wilson
* @author Oliver Drotbohm
* @since 2.7
*/
class HibernateJpaParametersParameterAccessor extends JpaParametersParameterAccessor {
private final BasicTypeRegistry typeHelper;
/**
* Creates a new {@link ParametersParameterAccessor}.
*
* @param parameters must not be {@literal null}.
* @param values must not be {@literal null}.
* @param em must not be {@literal null}.
*/
HibernateJpaParametersParameterAccessor(Parameters<?, ?> parameters, Object[] values, EntityManager em) {
super(parameters, values);
this.typeHelper = em.getEntityManagerFactory()
.unwrap(SessionFactoryImplementor.class)
.getTypeConfiguration()
.getBasicTypeRegistry();
}
@Override
@Nullable
@SuppressWarnings("unchecked")
public Object getValue(Parameter parameter) {
var value = super.getValue(parameter.getIndex());
if (value != null) {
return value;
}
var type = typeHelper.getRegisteredType(parameter.getType());
if (type == null) {
return null;
}
return new TypedParameterValue<>(type, null);
}
}
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