| /* |
| * 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.camel; |
| |
| import java.lang.annotation.Documented; |
| import java.lang.annotation.ElementType; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.annotation.Target; |
| |
| /** |
| * An annotation used to mark methods to indicate code capable of being a |
| * fallback converter which are then auto-discovered using |
| * the <a href="http://camel.apache.org/type-converter.html">Type |
| * Conversion Support</a>. |
| * <p/> |
| * The difference between a regular <tt>@Converter</tt> and a <tt>@FallbackConverter</tt> |
| * is that the fallback is resolved at last if no regular converter could be found. |
| * Also the method signature is scoped to be generic to allow handling a broader range |
| * of types trying to be converted. The fallback converter can just return <tt>null</tt> |
| * if it can not handle the types to convert from/to. |
| * |
| * @see org.apache.camel.component.file.GenericFileConverter GenericFileConverter for an example. |
| * @deprecated use @Converter(fallback = true) instead |
| */ |
| @Retention(RetentionPolicy.RUNTIME) |
| @Documented |
| @Target({ElementType.TYPE, ElementType.METHOD }) |
| @Deprecated |
| public @interface FallbackConverter { |
| |
| /** |
| * Whether or not returning <tt>null</tt> is a valid response. |
| */ |
| boolean allowNull() default false; |
| |
| /** |
| * Whether or not this fallback converter can be promoted to a first class type converter. |
| */ |
| boolean canPromote() default false; |
| |
| } |