1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
package de.lmu.ifi.dbs.elki.utilities.xml;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2012
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import org.w3c.dom.Attr;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
/**
* Class for cloning XML document, with filter capabilites
*
* @author Erich Schubert
*/
public class DOMCloner {
/**
* Deep-clone a document.
*
* @param domImpl DOM implementation to use
* @param document Original document
* @return Cloned document
*/
public Document cloneDocument(DOMImplementation domImpl, Document document) {
Element root = document.getDocumentElement();
// New document
Document result = domImpl.createDocument(root.getNamespaceURI(), root.getNodeName(), null);
Element rroot = result.getDocumentElement();
// Cloning the document element is a bit tricky.
// This is adopted from DomUtilities#deepCloneDocument
boolean before = true;
for(Node n = document.getFirstChild(); n != null; n = n.getNextSibling()) {
if(n == root) {
before = false;
copyAttributes(result, root, rroot);
for(Node c = root.getFirstChild(); c != null; c = c.getNextSibling()) {
final Node cl = cloneNode(result, c);
if(cl != null) {
rroot.appendChild(cl);
}
}
}
else {
if(n.getNodeType() != Node.DOCUMENT_TYPE_NODE) {
final Node cl = cloneNode(result, n);
if(cl != null) {
if(before) {
result.insertBefore(cl, rroot);
}
else {
result.appendChild(cl);
}
}
}
}
}
return result;
}
/**
* Clone an existing node.
*
* @param doc Document
* @param eold Existing node
* @return Cloned node
*/
public Node cloneNode(Document doc, Node eold) {
return doc.importNode(eold, true);
}
/**
* Copy the attributes from an existing node to a new node.
*
* @param doc Target document
* @param eold Existing node
* @param enew Target node
*/
public void copyAttributes(Document doc, Element eold, Element enew) {
if(eold.hasAttributes()) {
NamedNodeMap attr = eold.getAttributes();
int len = attr.getLength();
for(int i = 0; i < len; i++) {
enew.setAttributeNode((Attr) doc.importNode(attr.item(i), true));
}
}
}
}
|
