MIRTH: Get Base64 compressed ZIP with password from String

gistfile1.js

function generateBase64ZipFromString(filenameInZip, fileContents, password, tmpDir) {

	importPackage(Packages.net.lingala.zip4j);

	var uuid = UUIDGenerator.getUUID();

	var filenameZip = tmpDir + uuid + ".zip";
	var filenameCsv = tmpDir + uuid + ".csv";

	var zipFile = new Packages.net.lingala.zip4j.core.ZipFile( filenameZip );
	var filesToAdd = new java.util.ArrayList();

	FileUtil.write( filenameCsv, false, fileContents );
	 
	filesToAdd.add( new java.io.File( filenameCsv ) );

	var parameters = new Packages.net.lingala.zip4j.model.ZipParameters();
	//parameters.setCompressionMethod(Packages.net.lingala.zip4j.util.Zip4jConstants.COMP_STORE); // set compression method to store compression
	parameters.setEncryptFiles(true);
	 
	// Set the encryption method to AES Zip Encryption
	parameters.setEncryptionMethod(Packages.net.lingala.zip4j.util.Zip4jConstants.ENC_METHOD_AES);
	parameters.setAesKeyStrength(Packages.net.lingala.zip4j.util.Zip4jConstants.AES_STRENGTH_256);
	// Standard zip Encryption
	//parameters.setEncryptionMethod(Zip4jConstants.ENC_METHOD_STANDARD);
	parameters.setFileNameInZip( filenameInZip );
	parameters.setSourceExternalStream(true);

	parameters.setPassword(password);
	 
	zipFile.addFiles(filesToAdd, parameters);

	var zipBase64 = FileUtil.encode( FileUtil.readBytes( filenameZip ) );

	// Delete tmp files
	var file = Packages.java.io.File( filenameZip );
	file["delete"]();
	file = Packages.java.io.File( filenameCsv );
	file["delete"]();

	return zipBase64;
}