Examples of DataWeave in Apex (Developer Preview)

These are instructions to use DataWeave in Apex, with an associated example.

• Create a scratch org that has the DataWeaveInApex feature included in its definition file. See Build Your Own Scratch Org Definition File.
• Create a DataWeave script source file.
  For example: csvToContacts.dwl.

  1%dw 2.0
  2input records application/csv
  3output application/apex
  4---
  5records map(record) -> {
  6 FirstName: record.first_name,
  7 LastName: record.last_name,
  8 Email: record.email
  9} as Object {class: "Contact"}
  10

• Create the associated metadata file.

  For example: csvToContacts.dwl-meta.xml.

  1<?xml version="1.0" encoding="UTF-8"?>
  2<DataWeaveResource xmlns="http://soap.sforce.com/2006/04/metadata">
  3    <apiVersion>56.0</apiVersion>
  4</DataWeaveResource>
  5

• Push the source to the scratch org using Salesforce CLI version v7.151.9 or higher. See Salesforce CLI Release Notes.
• Invoke the DataWeave script from Apex and check the results from anonymous Apex.
  This example invokes the csvToContacts.dwl script.

  1// CSV data for Contacts
  2String inputCsv = 'first_name,last_name,email\nCodey,"The Bear",codey@salesforce.com'; 
  3DataWeave.Script dwscript = DataWeave.Script.createScript('csvToContacts');
  4DataWeave.Result dwresult = dwscript.execute(new Map<String, Object>{'records' => inputCsv});
  5List<Contact> results = (List<Contact>)dwresult.getValue();
  6
  7Assert.areEqual(1, results.size());
  8Contact codeyContact = results[0];
  9Assert.areEqual('Codey',codeyContact.FirstName);
  10Assert.areEqual('The Bear',codeyContact.LastName);