Accept or Reject detected changes

GroupDocs.Comparison provides an ability to apply or discard specific changes between source and target files and save resultant document with (or without) selected changes.

The following are the steps to apply/reject changes to resultant file.

Instantiate Comparer objectwith source document path or stream;
Call add method and specify path target document path or stream;
Call compare method;
Call getChanges method and obtain detected changes list;
Set ComparisonAction of needed change object to ComparisonAction.ACCEPT or ComparisonAction.REJECT value;
Call applyChanges method and pass collection of changes to it;

ApplyChangeOptions class:

getChanges() - Array of changes that must be applied (or not) to the resulting document;
setSaveOriginalState - Keep the original state of the compared result after applying changes.

The following code sample shows how to accept/reject detected changes.

Accept or Reject changes for documents stored at local disk

try (Comparer comparer = new Comparer("C:\\source.docx")) {
    comparer.add("C:\\target.docx");
    final Path resultPath = comparer.compare();
    ChangeInfo[] changes = comparer.getChanges();
    changes[0].setComparisonAction(ComparisonAction.REJECT);
    comparer.applyChanges("result.docx", new SaveOptions(), new ApplyChangeOptions(changes));
}

Accept or Reject changes for documents provided as a stream

try (OutputStream outputStream = new FileOutputStream("C:\\result.docx");
        Comparer comparer = new Comparer("C:\\source.docx")) {
    comparer.add("C:\\target.docx");
    final Path resultPath = comparer.compare(new SaveOptions(), new CompareOptions());
    ChangeInfo[] changes = comparer.getChanges();
    changes[0].setComparisonAction(ComparisonAction.REJECT);
    comparer.applyChanges(outputStream, new ApplyChangeOptions(changes));
}

The following code sample shows how to accept/reject detected changes using SaveOriginalState option

try (Comparer comparer = new Comparer("source.docx")) {
	comparer.add("target.docx");
    final Path resultPath = comparer.compare();
    ChangeInfo[] changes = comparer.getChanges();
    changes[0].setComparisonAction(ComparisonAction.REJECT);
    ApplyChangeOptions changeOptions = new ApplyChangeOptions();
    changeOptions.setChanges(changes);
    changeOptions.setSaveOriginalState(true);
    comparer.applyChanges("resultWithRejectedChange.docx", changeOptions);
    changes = comparer.getChanges();
    changes[0].setComparisonAction(ComparisonAction.ACCEPT);
    comparer.applyChanges("resultWithAcceptedChange.docx", new ApplyChangeOptions(changes));
}

More resources

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App

Along with full-featured Java library we provide simple, but powerful free Apps. You are welcome to compare your DOC or DOCX, XLS or XLSX, PPT or PPTX, PDF, EML, EMLX, MSGand other documents with free to use online GroupDocs Comparison App.

Comparison Adjusting comparison sensitivity