ExtensionAttachment


1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  /* $Id: ExtensionAttachment.java 426576 2006-07-28 15:44:37Z jeremias $ */
19  
20  package org.apache.fop.fo.extensions;
21  
22  /**
23   * This interface is implemented by objects that are returned by special extension element
24   * through the FONode.getExtensionAttachment() method. Such objects are carried in the FO tree
25   * and made available to the layout managers that support processing extension attachments or
26   * support passing them on to the area tree where they can be picked up by renderers.
27   * <p>
28   * NOTE: Classes which implement this interface need to be Serializable!
29   */
30  public interface ExtensionAttachment {
31  
32      /**
33       * This method returns a category URI that allows a processor (layout manager or renderer)
34       * to determine if it supports this object.
35       * @return the category URI
36       */
37      String   getCategory();
38      
39  }
40

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