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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.w3c.dom.Element;
import org.openoffice.xmerge.ConverterCapabilities;
import org.openoffice.xmerge.converter.xml.OfficeConstants;
/**
* <p>This is an implementations of the <code>Iterator</code> interface.
* It will traverse the tree and find cell <code>Node</code> sequences.</p>
*
* <p>Note: Once the XML Tree is parsed, then the <code>Iterator</code>
* will be a snap shot of that tree. That means even the tree is
* modified later, than the cached paragraph <code>Node</code> list will
* not be updated accordingly. For this reason and for performance reasons
* this <code>Iterator</code> does not support any operation methods such
* as insert, remove or replace. The main purpose of this
* <code>Iterator</code> is to be used with difference, not with merge.</p>
*
* @author smak
*/
public final class CellNodeIterator extends NodeIterator {
// can be expanded to an array in the future, not necessary right now
private static final String SUPPORTED_TAG1 = OfficeConstants.TAG_TABLE_CELL;
/**
* The standard constructor.
*
* @param cc The <code>ConverterCapabilities</code>.
* @param node The initial root <code>Node</code>.
*/
public CellNodeIterator(ConverterCapabilities cc, Node node) {
super(cc, node);
}
/**
* Overwrite the parent <code>nodeSupported</code> method. Only cell
* <code>Node</code> objects are supported.
*
* @param node The <code>Node</code> to check.
*
* @return true if the <code>Node</code> is supported, false otherwise.
*/
protected boolean nodeSupported(Node node) {
// can use an array later to check all possible tags for
// future expansion
if (node.getNodeType() == Node.ELEMENT_NODE &&
node.getNodeName().equals(SUPPORTED_TAG1)) {
return true;
} else {
return false;
}
}
protected boolean childrenEqual(Node node1, Node node2) {
boolean equal = false;
if (node1.hasChildNodes() && node2.hasChildNodes()) {
Element cell1 = (Element)node1;
Element cell2 = (Element)node2;
// only need compare the first <text:p> children node, don't want
// to compare any non-supported features
// TODO: need to confirm whether all the text string is the
// first <text:p>, though I checked with the openoffice 619 build
Node paraNode1 = cell1.getElementsByTagName(
OfficeConstants.TAG_PARAGRAPH).item(0);
Node paraNode2 = cell2.getElementsByTagName(
OfficeConstants.TAG_PARAGRAPH).item(0);
equal = super.compareNode(paraNode1, paraNode2);
}
return equal;
}
}
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