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21 
22 
23 
24 package org.openoffice.xmerge.converter.xml.xslt;
25 
26 import org.w3c.dom.Document;
27 
28 import org.openoffice.xmerge.DocumentMerger;
29 import org.openoffice.xmerge.MergeException;
30 import org.openoffice.xmerge.ConverterCapabilities;
31 import org.openoffice.xmerge.converter.xml.xslt.GenericOfficeDocument;
32 import org.openoffice.xmerge.merger.DiffAlgorithm;
33 import org.openoffice.xmerge.merger.Difference;
34 import org.openoffice.xmerge.merger.NodeMergeAlgorithm;
35 import org.openoffice.xmerge.merger.Iterator;
36 import org.openoffice.xmerge.merger.diff.ParaNodeIterator;
37 import org.openoffice.xmerge.merger.diff.IteratorLCSAlgorithm;
38 import org.openoffice.xmerge.merger.merge.DocumentMerge;
39 import org.openoffice.xmerge.merger.merge.CharacterBaseParagraphMerge;
40 import org.openoffice.xmerge.util.Debug;
41 
42 
43 /**
44  *  Xslt implementation of <code>DocumentMerger</code>
45  *  for the {@link
46  *  org.openoffice.xmerge.converter.xml.xslt.PluginFactoryImpl
47  *  PluginFactoryImpl}.
48  */
49 public class DocumentMergerImpl implements DocumentMerger {
50 
51     private ConverterCapabilities cc_;
52     private org.openoffice.xmerge.Document orig = null;
53 
DocumentMergerImpl(org.openoffice.xmerge.Document doc, ConverterCapabilities cc)54     public DocumentMergerImpl(org.openoffice.xmerge.Document doc, ConverterCapabilities cc) {
55         cc_ = cc;
56         this.orig = doc;
57     }
58 
merge(org.openoffice.xmerge.Document modifiedDoc)59     public void merge(org.openoffice.xmerge.Document modifiedDoc) throws MergeException {
60 
61         GenericOfficeDocument wdoc1 = (GenericOfficeDocument) orig;
62         GenericOfficeDocument wdoc2 = (GenericOfficeDocument) modifiedDoc;
63 
64         Document doc1 = wdoc1.getContentDOM();
65         Document doc2 = wdoc2.getContentDOM();
66 
67         Iterator i1 = new ParaNodeIterator(cc_, doc1.getDocumentElement());
68         Iterator i2 = new ParaNodeIterator(cc_, doc2.getDocumentElement());
69 
70         DiffAlgorithm diffAlgo = new IteratorLCSAlgorithm();
71 
72         // find out the paragrah level diffs
73         Difference[] diffTable = diffAlgo.computeDiffs(i1, i2);
74 
75         if (Debug.isFlagSet(Debug.INFO)) {
76             Debug.log(Debug.INFO, "Diff Result: ");
77 
78             for (int i = 0; i < diffTable.length; i++) {
79                 Debug.log(Debug.INFO, diffTable[i].debug());
80             }
81         }
82 
83         // merge the paragraphs
84         NodeMergeAlgorithm charMerge = new CharacterBaseParagraphMerge();
85         DocumentMerge docMerge = new DocumentMerge(cc_, charMerge);
86 
87         Iterator result = null;
88 
89         docMerge.applyDifference(i1, i2, diffTable);
90     }
91 }
92 
93 
94