/*
* Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
*
* 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 com.querydsl.core.annotations;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
/**
* Annotation for APT based query type generation. Annotate constructors with this annotation.
*
* <p>Example</p>
*
* <pre>
* class UserInfo {
*
* private String firstName, lastName;
*
* {@code @QueryProjection}
* public UserInfo(String firstName, String lastName) {
* this.firstName = firstName;
* this.lastName = lastName;
* }
*
* // getters and setters
* }
* </pre>
*
* <p>The projection can then be used like this</p>
*
* <pre>
* {@code
* QUser user = QUser.user;
* List <UserInfo> result = querydsl.from(user)
* .where(user.valid.eq(true))
* .select(new QUserInfo(user.firstName, user.lastName))
* .fetch();
* }
* </pre>
*/
@Documented
@Target(ElementType.CONSTRUCTOR)
@Retention(RUNTIME)
public @interface QueryProjection {
}