http://www.bouncycastle.org/java.html: The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.
  • The Legion of the Bouncy Castle Inc. 
public class org.bouncycastle.cms.jcajce.ZlibCompressor implements org.bouncycastle.operator.OutputCompressor
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.cms.jcajce.ZlibCompressor
  super_class: java.lang.Object
{
  private static final java.lang.String ZLIB;
    descriptor: Ljava/lang/String;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: "1.2.840.113549.1.9.16.3.8"

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.cms.jcajce.ZlibCompressor this
         0: .line 10
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.bouncycastle.cms.jcajce.ZlibCompressor this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cms/jcajce/ZlibCompressor;

  public org.bouncycastle.asn1.x509.AlgorithmIdentifier getAlgorithmIdentifier();
    descriptor: ()Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // org.bouncycastle.cms.jcajce.ZlibCompressor this
         0: .line 17
            new org.bouncycastle.asn1.x509.AlgorithmIdentifier
            dup
            new org.bouncycastle.asn1.ASN1ObjectIdentifier
            dup
            ldc "1.2.840.113549.1.9.16.3.8"
            invokespecial org.bouncycastle.asn1.ASN1ObjectIdentifier.<init>:(Ljava/lang/String;)V
            invokespecial org.bouncycastle.asn1.x509.AlgorithmIdentifier.<init>:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;)V
            areturn
        end local 0 // org.bouncycastle.cms.jcajce.ZlibCompressor this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cms/jcajce/ZlibCompressor;

  public java.io.OutputStream getOutputStream(java.io.OutputStream);
    descriptor: (Ljava/io/OutputStream;)Ljava/io/OutputStream;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.bouncycastle.cms.jcajce.ZlibCompressor this
        start local 1 // java.io.OutputStream comOut
         0: .line 22
            new java.util.zip.DeflaterOutputStream
            dup
            aload 1 /* comOut */
            invokespecial java.util.zip.DeflaterOutputStream.<init>:(Ljava/io/OutputStream;)V
            areturn
        end local 1 // java.io.OutputStream comOut
        end local 0 // org.bouncycastle.cms.jcajce.ZlibCompressor this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    1     0    this  Lorg/bouncycastle/cms/jcajce/ZlibCompressor;
            0    1     1  comOut  Ljava/io/OutputStream;
    MethodParameters:
        Name  Flags
      comOut  
}
SourceFile: "ZlibCompressor.java"