package org.bouncycastle.cert.path; import java.util.HashSet; import java.util.Set; import org.bouncycastle.cert.X509CertificateHolder; class CertPathUtils { static Set getCriticalExtensionsOIDs(X509CertificateHolder[] certificates) { Set criticalExtensions = new HashSet(); for (int i = 0; i != certificates.length; i++) { criticalExtensions.addAll(certificates[i].getCriticalExtensionOIDs()); } return criticalExtensions; } }