// For complete examples and data files, please go to https://github.com/groupdocs-assembly/GroupDocs.Assembly-for-Java
String srcDocument = "/Presentation Templates/Multiple DS.pptx";
String docReport = "/Presentation Reports/Multiple DS_report.pptx";
try {
//Create an array of data source objects
Object[] dataSourceObj = new Object[] { new DataStorage(), DataStorage.excelData() };
//Create an array of data source string
String[] dataSourceString = new String[] { null, "contracts" };
DocumentAssembler assembler = new DocumentAssembler();
assembler.assembleDocument(CommonUtilities.getTestDataPath(srcDocument),
CommonUtilities.getTestOutPath(docReport), dataSourceObj, dataSourceString);
} catch (Exception exp) {
System.out.println("Exception: " + exp.getMessage());
}