Load document of specific format

The constructors Watermarker(String) and Watermarker(InputStream) can load a document of any supported format. When you’re loading a document, GroupDocs.Watermark automatically detects its type and creates an instance of the appropriate class. If document format is not supported, constructor throws¬†UnsupportedFileTypeException. If you need specify the format of a document to load, you can use constructors with LoadOptions parameter.

The following examle demonstrates how to create a watermarker for the Spreadsheet document:

advanced_usage.loading_documents.LoadingDocumentOfSpecificFormat

// Specify an absolute or relative path to your document. Ex: "C:\\Docs\\spreadsheet.xlsx"
String filePath = "spreadsheet.xlsx";                                                                    
SpreadsheetLoadOptions loadOptions = new SpreadsheetLoadOptions();                                                
Watermarker watermarker = new Watermarker(filePath, loadOptions);                                                 
                                                                                                                  
// use watermarker methods to manage watermarks in the Spreadsheet document                                       
TextWatermark watermark = new TextWatermark("Test watermark", new Font("Arial", 12));                             
                                                                                                                  
watermarker.add(watermark);                                                                                       
                                                                                                                  
watermarker.save("spreadsheet.xlsx");                                                                   
                                                                                                                  
watermarker.close();                                                                                            

Any supported format family has the specific LoadOptions descendant: