Generating PAdES-LT signature(CMSSignedData) using bouncy castle without DSS

Question

I have code which generates PAdES-B CMSSignedData.

After this I am including timestamp in usigned attributes which is making CMSSignedData PAdES-T.

How can I make it PAdES-LT? Where should we include revocation information?

Thanks in advance.

Code to generate PAdES-B CMSSignedData

private CMSSignedDataGenerator getCmsSignedDataGenerator(ElectronicSignatureModel signatureModel) {
        CMSSignedDataGenerator signGenerator = new CMSSignedDataGenerator();
        signGenerator.addCertificates(new JcaCertStore(signatureModel.getChain()));
        ContentSigner nonSigner = new ContentSigner() {

            @Override
            public byte[] getSignature() {
                return signatureModel.getSignature();
            }

            @Override
            public OutputStream getOutputStream() {
                return new ByteArrayOutputStream();
            }

            @Override
            public AlgorithmIdentifier getAlgorithmIdentifier() {
                return new DefaultSignatureAlgorithmIdentifierFinder()
                        .find(signatureModel.getSigningAlgorithm().getAlgoName());
            }
        };

        JcaSignerInfoGeneratorBuilder signerBuilder = new JcaSignerInfoGeneratorBuilder(
                new JcaDigestCalculatorProviderBuilder().build());
        signerBuilder.setDirectSignature(true);
       
        //user certificate
        Certificate userCertHolder = Certificate.getInstance(ASN1Primitive.fromByteArray(
                signatureModel.getChain().get(0).getEncoded()));
        signGenerator.addSignerInfoGenerator(signerBuilder.build(nonSigner, new X509CertificateHolder(userCertHolder)));
        return signGenerator;
    }
CMSSignedDataGenerator signGenerator = getCmsSignedDataGenerator(signatureModel, false);
CMSSignedData cmsSignedData = signGenerator.generate(new CMSProcessableByteArray(signatureModel.getSignature()), false);