/*
 * Copyright 2020 io.xream.sqli
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 io.xream.sqli.annotation;


import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * @author Sim
 */
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD, ElementType.METHOD, ElementType.TYPE})
public @interface X {

    /**
     * only effect on getter<br>
     */
    int length() default 20;


    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.FIELD, ElementType.TYPE})
    @interface Mapping {
        String value() default "";
    }


    /**
     * not cached two
     */
    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.TYPE})
    @interface NoCache {
    }

    /**
     * only effect on property<br>
     * will not save the property in relation DB, like MySql<br>
     * but will save the property int cache, or K-V DB,like mc or redis<br>
     * instead of "transient", while transport the stream of object
     */
    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.FIELD})
    @interface Ignore {
    }


    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.FIELD})
    @interface Key {
    }

    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.FIELD})
    @interface Tag {
    }

    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.FIELD})
    @interface TagTarget {
    }

}
