/* * Copyright 2015 Realm Inc. * * 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 io.realm.annotations; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; /** * This annotation will mark the field as not nullable. When the field is {@link Required}, * it cannot be set to {@code null}. * <p> * Only {@code Boolean, Byte, Short, Integer, Long, Float, Double, String, byte[], Date} can be annotated * with {@link Required}. Compiling will fail when fields with other types have {@link Required} annotation. * Fields with primitive types and the {@link io.realm.RealmList} type are required implicitly. * Fields with {@link io.realm.RealmObject} type are always nullable. */ @Retention(RetentionPolicy.CLASS) @Target(ElementType.FIELD) public @interface Required { }