---
title: "SublineChangeLineSublineUpdater"
slug: "sublinechangelinesublineupdater"
updated: 2023-11-04T11:39:56Z
published: 2023-11-04T11:39:56Z
canonical: "docs.zilliant.com/sublinechangelinesublineupdater"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zilliant.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Subline Change Line Subline Updater Class

After a user updates a field on a parameter subline, this Apex hook can update fields on the parent line fields, and one or more fields on one or more sublines of that parent line.

          Note

          

This hook is similar to the [Line Change Subline Updater](/v1/docs/line-change-subline-updater) hook. The primary difference is that the **Subline Change Line Subline Updater** hook is triggered by a change to a subline.

## Apex hook class

- It must implement the **SublineChangeLineSublineUpdater** interface.
- It must have a global access modifier.
- You must specify the Apex hook class name in the **Subline Change Updater Class Name** field of the **Product Selector Configuration**.

## Interface definition

```
global interface SublineChangeLineSublineUpdater
{
    LinesAndSublinesResponse updateLineSublinesOnSublineChange(LinesAndSublinesInputData data);
}
```

```
global class LinesAndSublinesInputData {
    @AuraEnabled global SObject changedSObject { get; private set; }
    @AuraEnabled global SObject line { get; private set; }
    @AuraEnabled global String changedFieldName { get; private set; }
    @AuraEnabled global List<SObject> parameterSublines { get; private set; }
    @AuraEnabled global List<SObject> tieredSublines { get; private set; }
 
    global LinesAndSublinesInputData(SObject changedSObject, String changedFieldName, SObject line, List<SObject> parameterSublines, List<SObject> tieredSublines) {
        this.changedSObject = changedSObject;
        this.line = line;
        this.changedFieldName = changedFieldName;
        this.parameterSublines = parameterSublines;
        this.tieredSublines = tieredSublines;
    }
}
```

As an input parameter, this method has **LinesAndSublinesInputData** which contains **changedSObject** (the object that was updated by user), a line, a **changedFieldName** (the field that was changed by the user on **changedSObject**), **parameterSublines** and **tieredSublines**.

As a return value, the method has **LinesAndSublinesResponse** which contains an updated line, **parameterSublines** and **tieredSublines**.

#### Example of the LinesAndSublinesResponse

```
global class LinesAndSublinesResponse {
    @AuraEnabled global SObject line;
    @AuraEnabled global List<SObject> parameterSublines;
    @AuraEnabled global List<SObject> tieredSublines;
 
    global LinesAndSublinesResponse(SObject line, List<SObject> parameterSublines, List<SObject> tieredSublines)
    {
        this.line = line;
        this.parameterSublines = parameterSublines;
        this.tieredSublines = tieredSublines;
    }
}
```

## Example of the class implementation

```
public with sharing class TestLineSublinesUpdaterOnSublineChange implements SublineChangeLineSublineUpdater{
    public LinesAndSublinesResponse updateLineSublinesOnSublineChange(LinesAndSublinesInputData data) {
        if ((String) data.changedSObject.get('zpl__ups_UOM__c') == 'test' && data.changedFieldName == 'zpl__ups_UOM__c') {
            data.line.put('zpl__ContractPrice__c', 100);
 
            for (SObject tieredSublines : data.tieredSublines) {
                tieredSublines.put('zpl__ups_UOM__c', 'update');
                tieredSublines.put('zpl__ups_Offer__c', 123);
                tieredSublines.put('zpl__ups_Guidance__c', 1111);
                tieredSublines.put('tbesh__Currency__c', 100);
            }
 
            for (SObject parameterSubline : data.parameterSublines) {
                parameterSubline.put('zpl__ups_Guidance__c', 1111);
            }
        }
 
        return new LinesAndSublinesResponse(data.line, data.parameterSublines, data.tieredSublines);
    }
}
```