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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
package org.openoffice.xmerge.merger.diff;
import org.w3c.dom.Node;
import org.openoffice.xmerge.ConverterCapabilities;
import org.openoffice.xmerge.converter.xml.OfficeConstants;
/**
* This is an implementation of the {@code Iterator} interface.
*
* <p>It will traverse the tree and find the Paragraph/Heading {@code Node}
* sequences.</p>
*
* <p>Note: Once the XML Tree is parsed, then the {@code Iterator} will be a
* snapshot of that tree. That means even the tree is modified later, then the
* cached paragraph {@code Node} list will not be updated accordingly. For this
* reason and for performance reasons this {@code Iterator} does not support any
* operation methods such as insert, remove or replace. The main purpose of this
* {@code Iterator} is to be used with difference, not with merge.</p>
*/
public final class ParaNodeIterator extends NodeIterator {
/**
* Standard constructor.
*
* @param cc The {@code ConverterCapabilities}.
* @param node The initial root {@code Node}.
*/
public ParaNodeIterator(ConverterCapabilities cc, Node node) {
// not using convertercapabilities unless it's needed in future.
super(cc, node);
}
/**
* Overwrite the parent <code>nodeSupported</code> method.
*
* @param node {@code Node} to check.
*
* @return {@code true} if the {@code Node} is supported, {@code false}
* otherwise.
*/
@Override
protected boolean nodeSupported(Node node) {
// can use an array later to check all possible tags for
// future expansion
String nodeName = node.getNodeName();
return node.getNodeType() == Node.ELEMENT_NODE &&
(nodeName.equals(OfficeConstants.TAG_PARAGRAPH) ||
nodeName.equals(OfficeConstants.TAG_HEADING));
}
}
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