org.springframework.data.jpa.repository.support.MutableQueryHints Maven / Gradle / Ivy
/*
* Copyright 2020-2021 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.repository.support;
import java.util.List;
import java.util.Map;
import java.util.function.BiConsumer;
import javax.persistence.EntityManager;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
/**
* Mutable implementation of {@link QueryHints}, without the Option to switch between
* {@link #forCounts()}/{@link #withFetchGraphs(EntityManager)} hints.
*
* @author Jens Schauder
* @author Mark Paluch
* @since 2.4
* @see QueryHints
*/
public class MutableQueryHints implements QueryHints {
private final MultiValueMap values = new LinkedMultiValueMap<>();
/*
* (non-Javadoc)
* @see org.springframework.data.jpa.repository.support.QueryHints#withFetchGraphs(javax.persistence.EntityManager)
*/
@Override
public QueryHints withFetchGraphs(EntityManager em) {
return this;
}
/*
* (non-Javadoc)
* @see org.springframework.data.jpa.repository.support.QueryHints#forCounts()
*/
@Override
public QueryHints forCounts() {
return this;
}
/*
* (non-Javadoc)
* @see org.springframework.data.jpa.repository.support.QueryHints#forEach(java.util.function.BiConsumer)
*/
@Override
public void forEach(BiConsumer action) {
for (Map.Entry> entry : values.entrySet()) {
for (Object value : entry.getValue()) {
action.accept(entry.getKey(), value);
}
}
}
/**
* Add a new key-value pair for a hint.
*
* @param name
* @param value
*/
public void add(String name, Object value) {
values.add(name, value);
}
MultiValueMap getValues() {
return values;
}
}