How can I use the “list” keyword in Apex for storing and processing w collection of records with the “pending” status?
I am currently engaged in a particular task that is related to developing a Salesforce apex class for handling bulk operations on a custom Object. In this particular task, I need to store a collection of records that would meet specific criteria for further processing. How can I use the “List” keyword effectively in this particular scenario?
In the context of Salesforce, the “list” keyword is commonly used for storing the collection of records of data. Here is how you can effectively use the “list” keyword for storing and processing a collection of records with the “pending” status:-
Public class CustomObjectProcessor {
// Method to process bulk updates for custom objects with ‘Pending’ status
Public static void processPendingRecords() {
// Define a list to store custom object records with ‘Pending’ status
List pendingRecords = new List();
// Query for custom object records with ‘Pending’ status
pendingRecords = [SELECT Id, Name, Status__c FROM CustomObject__c WHERE Status__c = ‘Pending’];
// Check if there are any ‘Pending’ records to process
If (!pendingRecords.isEmpty()) {
// Iterate through each record for further processing
For (CustomObject__c record : pendingRecords) {
// Perform the required processing on each record
// For example, update the ‘Status__c’ field to ‘Processed’
Record.Status__c = ‘Processed’;
}
// Update the processed records using DML (Data Manipulation Language)
Try {
Update pendingRecords;
System.debug(‘Pending records processed successfully’);
} catch (Exception e) {
System.debug(‘Error processing pending records: ‘ + e.getMessage());
}
} else {
System.debug(‘No pending records found’);
}
}
// Example usage in a test method or elsewhere
Public static void main(String[] args) {
// Call the processPendingRecords method to process pending records
processPendingRecords();
}
}
Here is the example given in java programming language:-
Import java.util.ArrayList;
Import java.util.List;
Public class CustomObjectProcessor {
// Define a custom object class representing records
Static class CustomObject {
String id;
String name;
String status;
CustomObject(String id, String name, String status) {
This.id = id;
This.name = name;
This.status = status;
}
}
// Method to process pending records
Public static void processPendingRecords() {
// Create a list to store custom object records
List records = new ArrayList<>();
// Simulate adding custom object records with ‘Pending’ status
Records.add(new CustomObject(“001”, “Record1”, “Pending”));
Records.add(new CustomObject(“002”, “Record2”, “Pending”));
Records.add(new CustomObject(“003”, “Record3”, “Processed”)); // Simulating a processed record
// Iterate through the list and process pending records
For (CustomObject record : records) {
If (record.status.equals(“Pending”)) {
// Perform processing on pending records
Record.status = “Processed”;
System.out.println(“Record ID: “ + record.id + “ processed successfully.”);
}
}
}
Public static void main(String[] args) {
// Call the method to process pending records
processPendingRecords();
}
}