org.jooq.Require Maven / Gradle / Ivy
/*
* Copyright (c) 2009-2016, Data Geekery GmbH (http://www.datageekery.com)
* All rights reserved.
*
* 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
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.jooq;
import static java.lang.annotation.ElementType.CONSTRUCTOR;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PACKAGE;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
/**
* Require a set of {@link SQLDialect} to be supported by any jOOQ statement in
* the scope of this annotation.
*
* This annotation can be used at the use-site of jOOQ API at any given scope
* {@link ElementType#PACKAGE}, {@link ElementType#TYPE},
* {@link ElementType#METHOD} in order to specify that the given scope requires
* ALL of the supplied {@link SQLDialect} to be supported by all usage of jOOQ
* API within the scope. For example:
*
*
* // Allow only MYSQL or ORACLE dialect support to be used within the class scope
* @Allow(MYSQL, ORACLE)
* public class MySQLAndOracleDAO {
*
* // Allow rule from class applies to this method
* public void mysqlAndOracleMethod() {
* DSL.using(configuration)
* .insertInto(TABLE, TABLE.COLUMN)
* .values(1)
* // This type checks as it works on both MySQL and Oracle
* .onDuplicateKeyUpdate()
* .set(TABLE.COLUMN, 2)
* .execute();
* }
*
* // Refine class Allow rule with additional requirement
* @Require(ORACLE)
* public void oracleOnlyMethod() {
* DSL.using(configuration)
* .mergeInto(TABLE)
* .using(selectOne())
* .on(TABLE.COLUMN.eq(1))
* .whenMatchedThenUpdate()
* .set(TABLE.COLUMN, 2)
* .whenNotMatchedThenInsert(TABLE.COLUMN)
* .values(1)
* .execute();
* }
* }
*
* Type checking for these annotations can be supplied by
* org.jooq.checker.SQLDialectChecker from the jOOQ-checker module.
*
* Type checking for these annotations can be supplied by
* org.jooq.checker.SQLDialectChecker from the jOOQ-checker module.
*
Rules:
*
* - In the absence of any {@link Allow} annotation, no jOOQ API usage is
* allowed.
* - The combination of all {@link Allow} annotations and of the inner-most
* {@link Require} annotation is applied for any given scope.
* - Nested packages are not creating nested scopes.
* - If a versioned {@link SQLDialect} is required (rather than a
* {@link SQLDialect#family()}), then the required version, any of its
* {@link SQLDialect#predecessor()}, or its {@link SQLDialect#family()} are
* required.
*
*
* @author Lukas Eder
* @see Allow
*/
@Target({ METHOD, CONSTRUCTOR, TYPE, PACKAGE })
@Retention(RUNTIME)
@Documented
@Inherited
public @interface Require {
/**
* A list of jOOQ {@link SQLDialect} which are required on any jOOQ API
* method that is annotated with {@link Support}.
*/
SQLDialect[] value() default {};
}