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// For complete examples and data files, please go to https://github.com/groupdocs-assembly/GroupDocs.Assembly-for-Java
public DataStorage() {
	mManagers = createManagers();
}

private static List<Manager> createManagers() {
	return Arrays.asList(
			createManager("John Smith", 37, new String[] { "A Company", "B Ltd.", "C & D" },
					new float[] { 1200000, 750000, 350000 },
					new Date[] { getDate(2015, 1, 1), getDate(2015, 4, 1), getDate(2015, 7, 1) }),
			createManager("Tony Anderson", 37, new String[] { "E Corp.", "F & Partners" },
					new float[] { 650000, 550000 }, new Date[] { getDate(2015, 2, 1), getDate(2015, 8, 1) }),
			createManager("July James", 37, new String[] { "G & Co.", "H Group", "I & Sons", "J Ent." },
					new float[] { 350000, 250000, 100000, 100000 }, new Date[] { getDate(2015, 2, 1),
							getDate(2015, 5, 1), getDate(2015, 7, 1), getDate(2015, 8, 1) }));
}

private static Manager createManager(String name, int age, String[] clientNames, float[] contractPrices,
		Date[] contractDates) {
	List<Contract> contracts = new ArrayList();
	Manager manager = new Manager(name, age, contracts);

	for (int i = 0; i < clientNames.length; i++)
		contracts.add(new Contract(manager, new Client(clientNames[i]), contractPrices[i], contractDates[i]));

	return manager;
}

private static Date getDate(int year, int month, int day) {
	return new Date(year - 1900, month - 1, day);
}

public Iterable<Manager> getManagers() {
	return mManagers;
}

public List<Client> getClients() {
	List<Client> clients = new ArrayList();

	for (Manager manager : mManagers) {
		for (Contract contract : manager.getContracts())
			clients.add(contract.getClient());
	}

	return clients;
}

public List<Contract> getContracts() {
	List<Contract> contracts = new ArrayList();

	for (Manager manager : mManagers) {
		for (Contract contract : manager.getContracts())
			contracts.add(contract);
	}

	return contracts;
}

private final List<Manager> mManagers;
	
public static DocumentTable excelData() throws Throwable{
	String dataFilePath = CommonUtilities.excelDataFile+"/Contracts Data.xlsx";
	// Set extracting of column names from the first row.
	DocumentTableOptions options = new DocumentTableOptions();
	options.setFirstRowContainsColumnNames(true);
	 
	// Use data of the _first_ worksheet.
	DocumentTable table = new DocumentTable(dataFilePath, 0, options);
	 
	// Check column count, names, and types.
	assert table.getColumns().getCount() == 3;
	 
	assert table.getColumns().get(0).getName().equals("Client");
	assert table.getColumns().get(0).getType() == String.class;
	 
	assert table.getColumns().get(1).getName().equals("Manager");
	assert table.getColumns().get(1).getType() == String.class;
	 
	// NOTE: A space is replaced with an underscore, because spaces are not allowed in column names.
	assert table.getColumns().get(2).getName().equals("Contract_Price");
	 
	// NOTE: The type of the column is double, because all cells in the column contain numeric values.
	assert table.getColumns().get(2).getType() == double.class;
	return table;
}
//Importing word processing table into presentation
public static DocumentTable importingWordProcessingTableIntoPresentation() throws Throwable{
	String dataFilePath = CommonUtilities.wordDataFile+"/Managers Data.docx";
	 
	// Do not extract column names from the first row, so that the first row to be treated as a data row.
	// Limit the largest row index, so that only the first four data rows to be loaded.
	DocumentTableOptions options = new DocumentTableOptions();
	options.setMaxRowIndex(3);
	 
	// Use data of the _second_ table in the document.
	DocumentTable table = new DocumentTable(dataFilePath, 1, options);
	 
	// Check column count and names.
	assert table.getColumns().getCount() == 2;
	 
	// NOTE: Default column names are used, because we do not extract the names from the first row.
	assert table.getColumns().get(0).getName().equals("Column1");
	assert table.getColumns().get(1).getName().equals("Column2");
	 return table;
}
//Generate report from presentation data source
public static DocumentTable presentationData() throws Throwable{
	String dataFilePath = CommonUtilities.presentationDataFile+"/Managers Data.pptx";
	 
	// Do not extract column names from the first row, so that the first row to be treated as a data row.
	// Limit the largest row index, so that only the first four data rows to be loaded.
	DocumentTableOptions options = new DocumentTableOptions();
	options.setMaxRowIndex(3);
	 
	// Use data of the _second_ table in the document.
	DocumentTable table = new DocumentTable(dataFilePath, 1, options);
	 
	// Check column count and names.
	assert table.getColumns().getCount() == 2;
	 
	// NOTE: Default column names are used, because we do not extract the names from the first row.
	assert table.getColumns().get(0).getName().equals("Column1");
	assert table.getColumns().get(1).getName().equals("Column2");
	 return table;
}
	
public static Object[] emailDataSourceObject(String srcDocument, String documentFormat){
	Object[] dataSources;
	if (documentFormat == ".eml" || documentFormat == ".msg") {
		ArrayList<String> recipients = new ArrayList();
		recipients.add("Named Recipient <named@example.com>");
		recipients.add("unnamed@example.com");
		
		final int extensionLength = 4;
		String subject = srcDocument.substring(0, srcDocument.length() - extensionLength);
		Manager manager = new DataStorage().getManagers().iterator().next();
		dataSources = new Object[] { new DataStorage(), "Example Sender <sender@example.com>", recipients,
				"cc@example.com", subject, manager };

	
		return dataSources;
	} else {
		dataSources = new Object[] { new DataStorage() }; 
		return dataSources;
	}
}
public static String[] emailDataSourceName(String documentFormat){ 
	String[] dataSourceNames;
	if (documentFormat == ".eml" || documentFormat == ".msg") {
		dataSourceNames = new String[] { null, "sender", "recipients", "cc", "subject", "manager" };
		return dataSourceNames;
	}else { 
		dataSourceNames = new String[] { null };
		return dataSourceNames;
	}
}