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$KeyFactory<KeyFormatProtoT extends com.google.protobuf.MessageLite, KeyT>
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: com.google.crypto.tink.KeyTypeManager$KeyFactory
  super_class: java.lang.Object
{
  private final java.lang.Class<KeyFormatProtoT> clazz;
    descriptor: Ljava/lang/Class;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/lang/Class<TKeyFormatProtoT;>;

  public void <init>(java.lang.Class<KeyFormatProtoT>);
    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$KeyFactory this
        start local 1 // java.lang.Class clazz
         0: .line 179
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 180
            aload 0 /* this */
            aload 1 /* clazz */
            putfield com.google.crypto.tink.KeyTypeManager$KeyFactory.clazz:Ljava/lang/Class;
         2: .line 181
            return
        end local 1 // java.lang.Class clazz
        end local 0 // com.google.crypto.tink.KeyTypeManager$KeyFactory this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lcom/google/crypto/tink/KeyTypeManager$KeyFactory<TKeyFormatProtoT;TKeyT;>;
            0    3     1  clazz  Ljava/lang/Class<TKeyFormatProtoT;>;
    Signature: (Ljava/lang/Class<TKeyFormatProtoT;>;)V
    MethodParameters:
       Name  Flags
      clazz  

  public final java.lang.Class<KeyFormatProtoT> getKeyFormatClass();
    descriptor: ()Ljava/lang/Class;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.crypto.tink.KeyTypeManager$KeyFactory this
         0: .line 187
            aload 0 /* this */
            getfield com.google.crypto.tink.KeyTypeManager$KeyFactory.clazz:Ljava/lang/Class;
            areturn
        end local 0 // com.google.crypto.tink.KeyTypeManager$KeyFactory this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/crypto/tink/KeyTypeManager$KeyFactory<TKeyFormatProtoT;TKeyT;>;
    Signature: ()Ljava/lang/Class<TKeyFormatProtoT;>;

  public abstract void validateKeyFormat();
    descriptor: (Lcom/google/protobuf/MessageLite;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.security.GeneralSecurityException
    Signature: (TKeyFormatProtoT;)V
    MethodParameters:
                Name  Flags
      keyFormatProto  

  public abstract KeyFormatProtoT parseKeyFormat(com.google.protobuf.ByteString);
    descriptor: (Lcom/google/protobuf/ByteString;)Lcom/google/protobuf/MessageLite;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws com.google.protobuf.InvalidProtocolBufferException
    Signature: (Lcom/google/protobuf/ByteString;)TKeyFormatProtoT;
    MethodParameters:
            Name  Flags
      byteString  

  public abstract KeyT createKey();
    descriptor: (Lcom/google/protobuf/MessageLite;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.security.GeneralSecurityException
    Signature: (TKeyFormatProtoT;)TKeyT;
    MethodParameters:
           Name  Flags
      keyFormat  

  public KeyT deriveKey(KeyFormatProtoT, java.io.InputStream);
    descriptor: (Lcom/google/protobuf/MessageLite;Ljava/io/InputStream;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // com.google.crypto.tink.KeyTypeManager$KeyFactory this
        start local 1 // com.google.protobuf.MessageLite keyFormat
        start local 2 // java.io.InputStream pseudoRandomness
         0: .line 226
            new java.security.GeneralSecurityException
            dup
         1: .line 227
            new java.lang.StringBuilder
            dup
            ldc "deriveKey not implemented for key of type "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield com.google.crypto.tink.KeyTypeManager$KeyFactory.clazz:Ljava/lang/Class;
            invokevirtual java.lang.Class.toString:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         2: .line 226
            invokespecial java.security.GeneralSecurityException.<init>:(Ljava/lang/String;)V
            athrow
        end local 2 // java.io.InputStream pseudoRandomness
        end local 1 // com.google.protobuf.MessageLite keyFormat
        end local 0 // com.google.crypto.tink.KeyTypeManager$KeyFactory this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    3     0              this  Lcom/google/crypto/tink/KeyTypeManager$KeyFactory<TKeyFormatProtoT;TKeyT;>;
            0    3     1         keyFormat  TKeyFormatProtoT;
            0    3     2  pseudoRandomness  Ljava/io/InputStream;
    Exceptions:
      throws java.security.GeneralSecurityException
    Signature: (TKeyFormatProtoT;Ljava/io/InputStream;)TKeyT;
    MethodParameters:
                  Name  Flags
      keyFormat         
      pseudoRandomness  
}
Signature: <KeyFormatProtoT::Lcom/google/protobuf/MessageLite;KeyT:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "KeyTypeManager.java"
NestHost: com.google.crypto.tink.KeyTypeManager
InnerClasses:
  public abstract KeyFactory = com.google.crypto.tink.KeyTypeManager$KeyFactory of com.google.crypto.tink.KeyTypeManager