org.apache.fop.render.pdf.extensions.AbstractPDFExtensionElement Maven / Gradle / Ivy
/*
* 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: AbstractPDFExtensionElement.java 1610822 2014-07-15 19:27:58Z vhennebert $ */
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;
}
}