| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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 android.arch.persistence.room; |
| |
| import java.lang.annotation.ElementType; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.annotation.Target; |
| |
| /** |
| * Marks a method as a type converter. A class can have as many @Converter methods as it needs. |
| * <p> |
| * Each converter method should receive 1 parameter and have non-void return type. |
| * |
| * <pre> |
| * // example converter for java.util.Date |
| * public static class Converters { |
| * {@literal @}TypeConverter |
| * public Date fromTimestamp(Long value) { |
| * return value == null ? null : new Date(value); |
| * } |
| * |
| * {@literal @}TypeConverter |
| * public Long dateToTimestamp(Date date) { |
| * if (date == null) { |
| * return null; |
| * } else { |
| * return date.getTime(); |
| * } |
| * } |
| *} |
| * </pre> |
| * @see TypeConverters |
| */ |
| @Target({ElementType.METHOD}) |
| @Retention(RetentionPolicy.CLASS) |
| public @interface TypeConverter { |
| } |