com.mysema.query.annotations.QueryDelegate Maven / Gradle / Ivy
/*
* Copyright 2011, Mysema Ltd
*
* 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.mysema.query.annotations;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
/**
* Declaration of a static delegate method
*
* Example :
*
*
* {@code @QueryDelegate(User.class)}
* public static Predicate like(QUser entity, User user) {
* BooleanBuilder builder = new BooleanBuilder();
* if (user.getFirstName() != null) {
* builder.and(entity.firstName.eq(user.getFirstName()));
* }
* if (user.getLastName() != null) {
* builder.and(entity.lastName.eq(user.getLastName()));
* }
* return builder.getValue();
* }
*
*
* This will be then available in the QUser type as an instance method without the first
* argument:
*
*
* User user = new User();
* user.setFirstName("John");
* user.setLastName("Doe");
* Predicate predicate = QUser.user.like(user);
*
*
* @author tiwe
*
*/
@Documented
@Target({METHOD})
@Retention(RUNTIME)
public @interface QueryDelegate {
/**
* @return
*/
Class value();
}