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Data Repository Support for Micronaut
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/*
 * Copyright 2017-2020 original 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 io.micronaut.data.annotation;

import io.micronaut.context.annotation.AliasFor;
import io.micronaut.core.annotation.Introspected;
import io.micronaut.data.model.naming.NamingStrategies;
import io.micronaut.data.model.naming.NamingStrategy;
import java.lang.annotation.*;

/**
 * Designates a class as being persisted. This is a generic annotation to identify a persistent type
 * and is typically not used directly but rather mapped to.
 *
 * @author graemerocher
 * @since 1.0
 */
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.ANNOTATION_TYPE, ElementType.TYPE, ElementType.FIELD, ElementType.METHOD})
@Documented
@Introspected(
    indexed = {
        @Introspected.IndexedAnnotation(annotation = Id.class),
        @Introspected.IndexedAnnotation(annotation = Version.class),
        @Introspected.IndexedAnnotation(annotation = DateCreated.class),
        @Introspected.IndexedAnnotation(annotation = DateUpdated.class),
        @Introspected.IndexedAnnotation(annotation = MappedProperty.class, member = "value"),
        @Introspected.IndexedAnnotation(annotation = Index.class, member = "value")
    }
)
public @interface MappedEntity {

    /**
     * The destination the type is persisted to. This could be the table name, document name,
     * column name etc. or some external form.
     *
     * @return The destination
     */
    String value() default "";

    /**
     * @return The naming strategy to use.
     */
    @AliasFor(annotation = io.micronaut.data.annotation.NamingStrategy.class, member = "value")
    Class namingStrategy() default NamingStrategies.UnderScoreSeparatedLowerCase.class;

    /**
     * @return Whether to escape identifiers in generated queries. Defaults to true.
     */
    boolean escape() default true;

    /**
     * @return The alias to use for the query
     */
    String alias() default "";

    /**
     * Only applies to supported databases.
     * @since 3.9
     * @return the schema to use for this query
     */
    String schema() default "";
}