spring-data-jpa DefaultQueryEnhancer 源码

2022-08-16
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spring-data-jpa DefaultQueryEnhancer 代码

文件路径：/spring-data-jpa/src/main/java/org/springframework/data/jpa/repository/query/DefaultQueryEnhancer.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.repository.query;

import java.util.Set;

import org.springframework.data.domain.Sort;
import org.springframework.lang.Nullable;

/**
 * The implementation of {@link QueryEnhancer} using {@link QueryUtils}.
 *
 * @author Diego Krupitza
 * @since 2.7.0
 */
public class DefaultQueryEnhancer implements QueryEnhancer {

	private final DeclaredQuery query;

	public DefaultQueryEnhancer(DeclaredQuery query) {
		this.query = query;
	}

	@Override
	public String applySorting(Sort sort, @Nullable String alias) {
		return QueryUtils.applySorting(this.query.getQueryString(), sort, alias);
	}

	@Override
	public String detectAlias() {
		return QueryUtils.detectAlias(this.query.getQueryString());
	}

	@Override
	public String createCountQueryFor(@Nullable String countProjection) {
		return QueryUtils.createCountQueryFor(this.query.getQueryString(), countProjection);
	}

	@Override
	public String getProjection() {
		return QueryUtils.getProjection(this.query.getQueryString());
	}

	@Override
	public Set<String> getJoinAliases() {
		return QueryUtils.getOuterJoinAliases(this.query.getQueryString());
	}

	@Override
	public DeclaredQuery getQuery() {
		return this.query;
	}
}

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本文标签： Java Spring
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