http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5. 
public class org.bouncycastle.asn1.crmf.OptionalValidity extends org.bouncycastle.asn1.ASN1Encodable
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.asn1.crmf.OptionalValidity
  super_class: org.bouncycastle.asn1.ASN1Encodable
{
  private org.bouncycastle.asn1.x509.Time notBefore;
    descriptor: Lorg/bouncycastle/asn1/x509/Time;
    flags: (0x0002) ACC_PRIVATE

  private org.bouncycastle.asn1.x509.Time notAfter;
    descriptor: Lorg/bouncycastle/asn1/x509/Time;
    flags: (0x0002) ACC_PRIVATE

  private void <init>(org.bouncycastle.asn1.ASN1Sequence);
    descriptor: (Lorg/bouncycastle/asn1/ASN1Sequence;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=4, args_size=2
        start local 0 // org.bouncycastle.asn1.crmf.OptionalValidity this
        start local 1 // org.bouncycastle.asn1.ASN1Sequence seq
         0: .line 20
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 22
            aload 1 /* seq */
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.getObjects:()Ljava/util/Enumeration;
            astore 2 /* en */
        start local 2 // java.util.Enumeration en
         2: .line 23
            goto 8
         3: .line 25
      StackMap locals: org.bouncycastle.asn1.crmf.OptionalValidity org.bouncycastle.asn1.ASN1Sequence java.util.Enumeration
      StackMap stack:
            aload 2 /* en */
            invokeinterface java.util.Enumeration.nextElement:()Ljava/lang/Object;
            checkcast org.bouncycastle.asn1.ASN1TaggedObject
            astore 3 /* tObj */
        start local 3 // org.bouncycastle.asn1.ASN1TaggedObject tObj
         4: .line 27
            aload 3 /* tObj */
            invokevirtual org.bouncycastle.asn1.ASN1TaggedObject.getTagNo:()I
            ifne 7
         5: .line 29
            aload 0 /* this */
            aload 3 /* tObj */
            iconst_1
            invokestatic org.bouncycastle.asn1.x509.Time.getInstance:(Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/x509/Time;
            putfield org.bouncycastle.asn1.crmf.OptionalValidity.notBefore:Lorg/bouncycastle/asn1/x509/Time;
         6: .line 30
            goto 8
         7: .line 33
      StackMap locals: org.bouncycastle.asn1.ASN1TaggedObject
      StackMap stack:
            aload 0 /* this */
            aload 3 /* tObj */
            iconst_1
            invokestatic org.bouncycastle.asn1.x509.Time.getInstance:(Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/x509/Time;
            putfield org.bouncycastle.asn1.crmf.OptionalValidity.notAfter:Lorg/bouncycastle/asn1/x509/Time;
        end local 3 // org.bouncycastle.asn1.ASN1TaggedObject tObj
         8: .line 23
      StackMap locals:
      StackMap stack:
            aload 2 /* en */
            invokeinterface java.util.Enumeration.hasMoreElements:()Z
            ifne 3
         9: .line 36
            return
        end local 2 // java.util.Enumeration en
        end local 1 // org.bouncycastle.asn1.ASN1Sequence seq
        end local 0 // org.bouncycastle.asn1.crmf.OptionalValidity this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   10     0  this  Lorg/bouncycastle/asn1/crmf/OptionalValidity;
            0   10     1   seq  Lorg/bouncycastle/asn1/ASN1Sequence;
            2   10     2    en  Ljava/util/Enumeration;
            4    8     3  tObj  Lorg/bouncycastle/asn1/ASN1TaggedObject;
    MethodParameters:
      Name  Flags
      seq   

  public static org.bouncycastle.asn1.crmf.OptionalValidity getInstance(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Lorg/bouncycastle/asn1/crmf/OptionalValidity;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // java.lang.Object o
         0: .line 40
            aload 0 /* o */
            instanceof org.bouncycastle.asn1.crmf.OptionalValidity
            ifeq 2
         1: .line 42
            aload 0 /* o */
            checkcast org.bouncycastle.asn1.crmf.OptionalValidity
            areturn
         2: .line 45
      StackMap locals:
      StackMap stack:
            aload 0 /* o */
            instanceof org.bouncycastle.asn1.ASN1Sequence
            ifeq 4
         3: .line 47
            new org.bouncycastle.asn1.crmf.OptionalValidity
            dup
            aload 0 /* o */
            checkcast org.bouncycastle.asn1.ASN1Sequence
            invokespecial org.bouncycastle.asn1.crmf.OptionalValidity.<init>:(Lorg/bouncycastle/asn1/ASN1Sequence;)V
            areturn
         4: .line 50
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Invalid object: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* o */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // java.lang.Object o
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0     o  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      o     

  public org.bouncycastle.asn1.DERObject toASN1Object();
    descriptor: ()Lorg/bouncycastle/asn1/DERObject;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=2, args_size=1
        start local 0 // org.bouncycastle.asn1.crmf.OptionalValidity this
         0: .line 63
            new org.bouncycastle.asn1.ASN1EncodableVector
            dup
            invokespecial org.bouncycastle.asn1.ASN1EncodableVector.<init>:()V
            astore 1 /* v */
        start local 1 // org.bouncycastle.asn1.ASN1EncodableVector v
         1: .line 65
            aload 0 /* this */
            getfield org.bouncycastle.asn1.crmf.OptionalValidity.notBefore:Lorg/bouncycastle/asn1/x509/Time;
            ifnull 3
         2: .line 67
            aload 1 /* v */
            new org.bouncycastle.asn1.DERTaggedObject
            dup
            iconst_1
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.asn1.crmf.OptionalValidity.notBefore:Lorg/bouncycastle/asn1/x509/Time;
            invokespecial org.bouncycastle.asn1.DERTaggedObject.<init>:(ZILorg/bouncycastle/asn1/DEREncodable;)V
            invokevirtual org.bouncycastle.asn1.ASN1EncodableVector.add:(Lorg/bouncycastle/asn1/DEREncodable;)V
         3: .line 70
      StackMap locals: org.bouncycastle.asn1.ASN1EncodableVector
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.asn1.crmf.OptionalValidity.notAfter:Lorg/bouncycastle/asn1/x509/Time;
            ifnull 5
         4: .line 72
            aload 1 /* v */
            new org.bouncycastle.asn1.DERTaggedObject
            dup
            iconst_1
            iconst_1
            aload 0 /* this */
            getfield org.bouncycastle.asn1.crmf.OptionalValidity.notAfter:Lorg/bouncycastle/asn1/x509/Time;
            invokespecial org.bouncycastle.asn1.DERTaggedObject.<init>:(ZILorg/bouncycastle/asn1/DEREncodable;)V
            invokevirtual org.bouncycastle.asn1.ASN1EncodableVector.add:(Lorg/bouncycastle/asn1/DEREncodable;)V
         5: .line 75
      StackMap locals:
      StackMap stack:
            new org.bouncycastle.asn1.DERSequence
            dup
            aload 1 /* v */
            invokespecial org.bouncycastle.asn1.DERSequence.<init>:(Lorg/bouncycastle/asn1/ASN1EncodableVector;)V
            areturn
        end local 1 // org.bouncycastle.asn1.ASN1EncodableVector v
        end local 0 // org.bouncycastle.asn1.crmf.OptionalValidity this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lorg/bouncycastle/asn1/crmf/OptionalValidity;
            1    6     1     v  Lorg/bouncycastle/asn1/ASN1EncodableVector;
}
SourceFile: "OptionalValidity.java"