Custom Settings Code Examples

Examples

Example 1: Hierarchical Custom Settings Usage

Pattern: User-specific configuration with hierarchy Use Case: User-level settings with profile/org defaults Complexity: Basic

Solution:

/**
 * Utility class for accessing Hierarchical Custom Settings
 */
public class NotificationSettings {
    
    /**
     * Get user's email notification preference
     * Falls back to profile default, then org default
     * @return Boolean indicating if emails are enabled
     */
    public static Boolean isEmailEnabled() {
        Notification_Config__c userSetting = Notification_Config__c.getInstance();
        
        // Returns user setting, or profile default, or org default
        return userSetting.Enable_Emails__c != null ? userSetting.Enable_Emails__c : false;
    }
    
    /**
     * Get org-wide default
     * @return Boolean indicating if emails are enabled org-wide
     */
    public static Boolean isEmailEnabledOrgWide() {
        Notification_Config__c orgSetting = Notification_Config__c.getOrgDefaults();
        return orgSetting.Enable_Emails__c != null ? orgSetting.Enable_Emails__c : false;
    }
}

Explanation:

Example 2: List Custom Settings Usage

Pattern: Simple key-value lookups Use Case: Configuration tables or lookup data Complexity: Basic

Solution:

/**
 * Utility class for accessing List Custom Settings
 */
public class CountryCodeLookup {
    
    private static Map<String, Country_Code__c> countryMap;
    
    /**
     * Get country name by country code
     * @param code Country code
     * @return Country name
     */
    public static String getCountryName(String code) {
        if (countryMap == null) {
            loadCountryMap();
        }
        
        Country_Code__c country = countryMap.get(code);
        return country != null ? country.Country_Name__c : null;
    }
    
    /**
     * Load all country codes into map
     */
    private static void loadCountryMap() {
        countryMap = Country_Code__c.getAll();
    }
}

Explanation: