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.ASN1OutputStream extends org.bouncycastle.asn1.DEROutputStream
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.asn1.ASN1OutputStream
  super_class: org.bouncycastle.asn1.DEROutputStream
{
  public void <init>(java.io.OutputStream);
    descriptor: (Ljava/io/OutputStream;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.ASN1OutputStream this
        start local 1 // java.io.OutputStream os
         0: .line 12
            aload 0 /* this */
            aload 1 /* os */
            invokespecial org.bouncycastle.asn1.DEROutputStream.<init>:(Ljava/io/OutputStream;)V
         1: .line 13
            return
        end local 1 // java.io.OutputStream os
        end local 0 // org.bouncycastle.asn1.ASN1OutputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/bouncycastle/asn1/ASN1OutputStream;
            0    2     1    os  Ljava/io/OutputStream;
    MethodParameters:
      Name  Flags
      os    

  public void writeObject(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.ASN1OutputStream this
        start local 1 // java.lang.Object obj
         0: .line 19
            aload 1 /* obj */
            ifnonnull 3
         1: .line 21
            aload 0 /* this */
            invokevirtual org.bouncycastle.asn1.ASN1OutputStream.writeNull:()V
         2: .line 22
            goto 10
         3: .line 23
      StackMap locals:
      StackMap stack:
            aload 1 /* obj */
            instanceof org.bouncycastle.asn1.DERObject
            ifeq 6
         4: .line 25
            aload 1 /* obj */
            checkcast org.bouncycastle.asn1.DERObject
            aload 0 /* this */
            invokevirtual org.bouncycastle.asn1.DERObject.encode:(Lorg/bouncycastle/asn1/DEROutputStream;)V
         5: .line 26
            goto 10
         6: .line 27
      StackMap locals:
      StackMap stack:
            aload 1 /* obj */
            instanceof org.bouncycastle.asn1.DEREncodable
            ifeq 9
         7: .line 29
            aload 1 /* obj */
            checkcast org.bouncycastle.asn1.DEREncodable
            invokeinterface org.bouncycastle.asn1.DEREncodable.getDERObject:()Lorg/bouncycastle/asn1/DERObject;
            aload 0 /* this */
            invokevirtual org.bouncycastle.asn1.DERObject.encode:(Lorg/bouncycastle/asn1/DEROutputStream;)V
         8: .line 30
            goto 10
         9: .line 33
      StackMap locals:
      StackMap stack:
            new java.io.IOException
            dup
            ldc "object not ASN1Encodable"
            invokespecial java.io.IOException.<init>:(Ljava/lang/String;)V
            athrow
        10: .line 35
      StackMap locals:
      StackMap stack:
            return
        end local 1 // java.lang.Object obj
        end local 0 // org.bouncycastle.asn1.ASN1OutputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   11     0  this  Lorg/bouncycastle/asn1/ASN1OutputStream;
            0   11     1   obj  Ljava/lang/Object;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      obj   
}
SourceFile: "ASN1OutputStream.java"