PGP Encryption Utilities

Getting this error while decrypting a file:

class org.bouncycastle.openpgp.PGPLiteralData cannot be cast to class org.bouncycastle.openpgp.PGPCompressedData (org.bouncycastle.openpgp.PGPLiteralData and org.bouncycastle.openpgp.PGPCompressedData are in unnamed module of loader org.apache.felix.framework.BundleWiringImpl$BundleClassLoader @47279598)

I see a similar issue was found 3 years ago but there was no response. Assistance would be appreciated.

@Vuram

In Class decryptFileWithExtension & Class decryptFile
PGPCompressedData cData = (PGPCompressedData)plainFact.nextObject();
I believe this is the error because in this case PGPLiteralData is casted to PGPCompressedData. Checking instanceof plainFact.nextObject() before any casts would prevent the error. 

@Vuram

In Class decryptFileWithExtension & Class decryptFile
PGPCompressedData cData = (PGPCompressedData)plainFact.nextObject();
I believe this is the error because in this case PGPLiteralData is casted to PGPCompressedData. Checking instanceof plainFact.nextObject() before any casts would prevent the error.