| /* |
| * 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.render.pdf.extensions; |
| |
| import org.apache.fop.fo.FONode; |
| import org.apache.fop.fo.extensions.ExtensionAttachment; |
| |
| /** |
| * Base class for the PDF-specific extension elements. |
| */ |
| public abstract class AbstractPDFExtensionElement extends FONode { |
| |
| /**Extension attachment. */ |
| protected PDFExtensionAttachment attachment; |
| |
| /** |
| * Default constructor |
| * |
| * @param parent parent of this node |
| * @see org.apache.fop.fo.FONode#FONode(FONode) |
| */ |
| public AbstractPDFExtensionElement(FONode parent) { |
| super(parent); |
| } |
| |
| /** {@inheritDoc} */ |
| public String getNamespaceURI() { |
| return PDFElementMapping.NAMESPACE; |
| } |
| |
| /** {@inheritDoc} */ |
| public String getNormalNamespacePrefix() { |
| return "pdf"; |
| } |
| |
| /** |
| * Returns the extension attachment. |
| * @return the extension attachment if one is created by the extension element, null otherwise. |
| * @see org.apache.fop.fo.FONode#getExtensionAttachment() |
| */ |
| public ExtensionAttachment getExtensionAttachment() { |
| if (attachment == null) { |
| this.attachment = (PDFExtensionAttachment)instantiateExtensionAttachment(); |
| } |
| return this.attachment; |
| } |
| |
| /** |
| * Instantiates extension attachment object. |
| * @return extension attachment |
| */ |
| protected ExtensionAttachment instantiateExtensionAttachment() { |
| return null; |
| } |
| |
| } |
| |