| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.directmemory.lightning.metadata; |
| |
| import java.lang.annotation.Documented; |
| import java.lang.annotation.ElementType; |
| import java.lang.annotation.Inherited; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.annotation.Target; |
| |
| /** |
| * Defines a property (annotated field or method) as an attribute to be serialized by Lightning.<br> |
| * |
| * <pre> |
| * |
| * public class MyEntity |
| * { |
| * |
| * private long id; |
| * |
| * @Attribute |
| * private String name; |
| * |
| * @Attribute |
| * public long getId() |
| * { |
| * return id; |
| * } |
| * |
| * public void setId( long id ) |
| * { |
| * this.id = id; |
| * } |
| * |
| * public String getName() |
| * { |
| * return name; |
| * } |
| * |
| * public void setName( String name ) |
| * { |
| * this.name = name; |
| * } |
| * } |
| * </pre> |
| */ |
| @Documented |
| @Inherited |
| @Retention( RetentionPolicy.RUNTIME ) |
| @Target( { ElementType.FIELD, ElementType.METHOD } ) |
| public @interface Attribute |
| { |
| |
| public static final String NULL = "~~NULL~~"; |
| |
| /** |
| * If a method is annotated this value defines a property name differs from property name extracted from methodname.<br> |
| * Means if method is "getFoo" property name defaults to "foo", but if the method is annotated by @Attribute("bar") |
| * the property name will be explicitly "bar". |
| * |
| * @return the defined property name |
| */ |
| String property() default NULL; |
| |
| boolean nullable() default false; |
| |
| } |