| /* |
| * 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. |
| */ |
| |
| /* $Id$ */ |
| |
| package org.apache.fop.fo.extensions; |
| |
| /** |
| * This interface is implemented by objects that are returned by special extension element |
| * through the FONode.getExtensionAttachment() method. Such objects are carried in the FO tree |
| * and made available to the layout managers that support processing extension attachments or |
| * support passing them on to the area tree where they can be picked up by renderers. |
| * <p> |
| * NOTE: Classes which implement this interface need to be Serializable! |
| */ |
| public interface ExtensionAttachment { |
| |
| /** |
| * This method returns a category URI that allows a processor (layout manager or renderer) |
| * to determine if it supports this object. |
| * @return the category URI |
| */ |
| String getCategory(); |
| |
| } |