Writing an Apex Class

To use an Apex Class for the advanced DataSource setup, you must implement the SBLS.DataSourceService.Fetchable interface. This interface requires the implementation of the execute method, where you define the logic for processing data. The processed data, along with mapping information to the List, must be returned as an instance of the SBLS.DataSourceService.Result object.

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🔸 Example Code

This example demonstrates retrieving inventory quantities from an external API based on product codes and mapping them to a virtual column (SBLS_Virtual1) in the List.

Since the SBLS.DataSourceService.Fetchable interface is provided by the package, both the Apex Class and its methods must be declared as global to ensure external access.

DataSourceInventory.cls

global class DataSourceInventory implements SBLS.DataSourceService.Fetchable {
    global SBLS.DataSourceService.Result execute(SBLS.DataSourceService.Parameter params) {
        // Retrieve records from the List
        List<SObject> records = params.gets();
    
        // Fetch DataSource values (e.g., inventory data) from an external API
        Map<String, Integer> inventoryData = new Map<String, Integer>(); 
        inventoryData.put('Product001', 10);
        inventoryData.put('Product002', 20);

        // Create the Result object
        SBLS.DataSourceService.Result result = new SBLS.DataSourceService.Result();

        // Map DataSource values to List records
        for (String productCode : inventoryData.keySet()) {
            SBLS.DataSourceService.Action action = new SBLS.DataSourceService.Action();
            action.setKeyValue(productCode); // Set the Key value for mapping
            action.putSourceToTargetField(
                inventoryData.get(productCode), // DataSource value: inventory
                'SBLS_Virtual1'                // Virtual column API name
            );
            result.addAction(action); // Add Action to the Result
        }
        
        return result; // Return the final Result
    }
}

1

Retrieve Records from the List

Use params.gets() to access the records retrieved by the List.

2

Prepare DataSource Values

• Simulate fetching data from an external API to retrieve inventory information.

• In the example, inventory data is mapped using ProductCode as the key.

<String, Integer> inventoryData = new Map<String, Integer>(); 
inventoryData.put('Product001', 10);
inventoryData.put('Product002', 20);

3

Generate the Result Object

• Create an instance of SBLS.DataSourceService.Action for each mapping.
• Set the DataSource value to the corresponding List field or virtual column using putSourceToTargetField.

• Add each action to the SBLS.DataSourceService.Result.

// Create the Result object
SBLS.DataSourceService.Result result = new SBLS.DataSourceService.Result();

// Map DataSource values to List records
for (String productCode : inventoryData.keySet()) {
    SBLS.DataSourceService.Action action = new SBLS.DataSourceService.Action();
    action.setKeyValue(productCode); // Set the Key value for mapping
    action.putSourceToTargetField(
        inventoryData.get(productCode), // DataSource value: inventory
        'SBLS_Virtual1'                // Virtual column API name
    );
    result.addAction(action); // Add Action to the Result
}

4

Return the Result Object

Return the Result object containing the mapping information for integration with the List.

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🔸 SBLS.DataSourceService.Parameter

This class provides access to the List’s records and fields selected during the builder configuration.

Example Code

global SBLS.DataSourceService.Result execute(SBLS.DataSourceService.Parameter params) {
    List<SObject> records = params.gets();
    ...
}

Method

List<SObject> gets()

Returns the records retrieved from the List. If no parameters are added during the builder setup, this will return an empty value.

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🔸 SBLS.DataSourceService.Result

The Result class holds all mapping information between the DataSource and the List. Actions added to this object define how the data is integrated.

Example Code

DataSourceInventory.cls

...
SBLS.DataSourceService.Result result = new SBLS.DataSourceService.Result();
for (String productCode : inventoryData.keySet()) {
    // Create an Action object to store mapping information
    SBLS.DataSourceService.Action action = new SBLS.DataSourceService.Action();
    action.setKeyValue(productCode); // Set the Key value for mapping
    action.putSourceToTargetField(
        inventoryData.get(productCode),  // DataSource value: inventory quantity
        'SBLS_Virtual1'                  // Target field: virtual column in the List
    );
    result.addAction(action); // Add Action to the Result
}
return result;

Method

addAction(SBLS.DataSourceService.Action action)

Adds an Action object containing mapping details to the Result.

Parameter	Type	Value
action	SBLS.DataSourceService.Action	An instance of the SBLS.DataSourceService.Action class that contains the mapping information between the List and the DataSource values.

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🔸 SBLS.DataSourceService.Action

The Action class stores mapping information between the DataSource and the List.

Example Code

DataSourceInventory.cls

SBLS.DataSourceService.Result result = new SBLS.DataSourceService.Result();
// Process each product code and inventory information from the DataSource
for (String productCode : inventoryData.keySet()) {
    SBLS.DataSourceService.Action action = new SBLS.DataSourceService.Action();
    // Set the product code as the Key value to map with the List/Line Item
    action.setKeyValue(productCode);
    
    // Map inventory information to the Inventory__c field in the List/Line Item
    action.putSourceToTargetField(
        inventoryData.get(productCode),    // DataSource value: inventory
        'SBLS_Virtual1'                    // Virtual column API name
    );
    result.addAction(action); // Add mapping information
}
return result; // Return the final result

Method

setKeyValue(Object keyValue)

Sets the Key value from the DataSource that corresponds to the List’s Key.

Parameter	Type	Value
keyValue	Object	The Key value from the DataSource for mapping.

putSourceToTargetField(Object sourceValue, String targetFieldApiName)

Maps the DataSource value to a field or virtual column in the List.

Parameter	Type	Value
sourceValue	Object	The value retrieved from the DataSource.
targetFieldApiName	String	The API name of the List’s field or virtual column.