com.aspose.words

Example:

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

// Normal editing of the document does not count as a revision.
builder.write("This does not count as a revision. ");

Assert.assertFalse(doc.hasRevisions());

// To register our edits as revisions, we need to declare an author, and then start tracking them.
doc.startTrackRevisions("John Doe", new Date());

builder.write("This is revision #1. ");

Assert.assertTrue(doc.hasRevisions());
Assert.assertEquals(1, doc.getRevisions().getCount());

// This flag corresponds to the "Review" -> "Tracking" -> "Track Changes" option in Microsoft Word.
// The "StartTrackRevisions" method does not affect its value,
// and the document is tracking revisions programmatically despite it having a value of "false".
// If we open this document using Microsoft Word, it will not be tracking revisions.
Assert.assertFalse(doc.getTrackRevisions());

// We have added text using the document builder, so the first revision is an insertion-type revision.
Revision revision = doc.getRevisions().get(0);
Assert.assertEquals("John Doe", revision.getAuthor());
Assert.assertEquals("This is revision #1. ", revision.getParentNode().getText());
Assert.assertEquals(RevisionType.INSERTION, revision.getRevisionType());
Assert.assertEquals(revision.getDateTime().getDate(), new Date().getDate());
Assert.assertEquals(doc.getRevisions().getGroups().get(0), revision.getGroup());

// Remove a run to create a deletion-type revision.
doc.getFirstSection().getBody().getFirstParagraph().getRuns().get(0).remove();

// Adding a new revision places it at the beginning of the revision collection.
Assert.assertEquals(RevisionType.DELETION, doc.getRevisions().get(0).getRevisionType());
Assert.assertEquals(2, doc.getRevisions().getCount());

// Insert revisions show up in the document body even before we accept/reject the revision.
// Rejecting the revision will remove its nodes from the body. Conversely, nodes that make up delete revisions
// also linger in the document until we accept the revision.
Assert.assertEquals("This does not count as a revision. This is revision #1.", doc.getText().trim());

// Accepting the delete revision will remove its parent node from the paragraph text
// and then remove the collection's revision itself.
doc.getRevisions().get(0).accept();

Assert.assertEquals(1, doc.getRevisions().getCount());
Assert.assertEquals("This is revision #1.", doc.getText().trim());

builder.writeln("");
builder.write("This is revision #2.");

// Now move the node to create a moving revision type.
Node node = doc.getFirstSection().getBody().getParagraphs().get(1);
Node endNode = doc.getFirstSection().getBody().getParagraphs().get(1).getNextSibling();
Node referenceNode = doc.getFirstSection().getBody().getParagraphs().get(0);

while (node != endNode)
{
    Node nextNode = node.getNextSibling();
    doc.getFirstSection().getBody().insertBefore(node, referenceNode);
    node = nextNode;
}

Assert.assertEquals(RevisionType.MOVING, doc.getRevisions().get(0).getRevisionType());
Assert.assertEquals(8, doc.getRevisions().getCount());
Assert.assertEquals("This is revision #2.\rThis is revision #1. \rThis is revision #2.", doc.getText().trim());

// The moving revision is now at index 1. Reject the revision to discard its contents.
doc.getRevisions().get(1).reject();

Assert.assertEquals(6, doc.getRevisions().getCount());
Assert.assertEquals("This is revision #1. \rThis is revision #2.", doc.getText().trim());