spring-data-elasticsearch ValueConverter 源码
spring-data-elasticsearch ValueConverter 代码
文件路径：/src/main/java/org/springframework/data/elasticsearch/annotations/ValueConverter.java
/*
* Copyright 2021-2022 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.elasticsearch.annotations;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.data.elasticsearch.core.mapping.PropertyValueConverter;
/**
* Annotation to put on a property of an entity to define a value converter which can convert the property to a type
* that Elasticsearch understands and back.
*
* @author Peter-Josef Meisch
* @since 4.3
*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.FIELD, ElementType.ANNOTATION_TYPE })
@Documented
@Inherited
public @interface ValueConverter {
/**
* Defines the class implementing the {@link PropertyValueConverter} interface. If this is a normal class, it must
* provide a default constructor with no arguments. If this is an enum and thus implementing a singleton by enum it
* must only have one enum value.
*
* @return the class to use for conversion
*/
Class<? extends PropertyValueConverter> value();
}
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