http://github.com/google/tink: Tink is a small cryptographic library that provides a safe, simple, agile and fast way to accomplish some common cryptographic tasks. 
public abstract class com.google.crypto.tink.KeyTypeManager$PrimitiveFactory<PrimitiveT, KeyT>
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: com.google.crypto.tink.KeyTypeManager$PrimitiveFactory
  super_class: java.lang.Object
{
  private final java.lang.Class<PrimitiveT> clazz;
    descriptor: Ljava/lang/Class;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/lang/Class<TPrimitiveT;>;

  public void <init>(java.lang.Class<PrimitiveT>);
    descriptor: (Ljava/lang/Class;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.crypto.tink.KeyTypeManager$PrimitiveFactory this
        start local 1 // java.lang.Class clazz
         0: .line 58
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 59
            aload 0 /* this */
            aload 1 /* clazz */
            putfield com.google.crypto.tink.KeyTypeManager$PrimitiveFactory.clazz:Ljava/lang/Class;
         2: .line 60
            return
        end local 1 // java.lang.Class clazz
        end local 0 // com.google.crypto.tink.KeyTypeManager$PrimitiveFactory this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lcom/google/crypto/tink/KeyTypeManager$PrimitiveFactory<TPrimitiveT;TKeyT;>;
            0    3     1  clazz  Ljava/lang/Class<TPrimitiveT;>;
    Signature: (Ljava/lang/Class<TPrimitiveT;>;)V
    MethodParameters:
       Name  Flags
      clazz  

  final java.lang.Class<PrimitiveT> getPrimitiveClass();
    descriptor: ()Ljava/lang/Class;
    flags: (0x0010) ACC_FINAL
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.crypto.tink.KeyTypeManager$PrimitiveFactory this
         0: .line 66
            aload 0 /* this */
            getfield com.google.crypto.tink.KeyTypeManager$PrimitiveFactory.clazz:Ljava/lang/Class;
            areturn
        end local 0 // com.google.crypto.tink.KeyTypeManager$PrimitiveFactory this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/crypto/tink/KeyTypeManager$PrimitiveFactory<TPrimitiveT;TKeyT;>;
    Signature: ()Ljava/lang/Class<TPrimitiveT;>;

  public abstract PrimitiveT getPrimitive();
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.security.GeneralSecurityException
    Signature: (TKeyT;)TPrimitiveT;
    MethodParameters:
      Name  Flags
      key   
}
Signature: <PrimitiveT:Ljava/lang/Object;KeyT:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "KeyTypeManager.java"
NestHost: com.google.crypto.tink.KeyTypeManager
InnerClasses:
  protected abstract PrimitiveFactory = com.google.crypto.tink.KeyTypeManager$PrimitiveFactory of com.google.crypto.tink.KeyTypeManager