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Cassandra support for Spring Data
/*
* Copyright 2018 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
*
* 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 org.springframework.data.cassandra.repository;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.core.annotation.AliasFor;
/**
* Annotation to declare exists queries directly on repository methods. Both attributes allow using a placeholder
* notation of {@code ?0}, {@code ?1} and so on.
*
* @author Mark Paluch
* @since 2.1
*/
@Target({ ElementType.METHOD, ElementType.ANNOTATION_TYPE })
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Query(exists = true)
public @interface ExistsQuery {
/**
* A Cassandra CQL3 string to define the actual query to be executed. Placeholders {@code ?0}, {@code ?1}, etc are
* supported.
*/
@AliasFor(annotation = Query.class)
String value() default "";
}