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. 
// Copyright 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////

package com.google.crypto.tink;

import com.google.crypto.tink.proto.EncryptedKeyset;
import com.google.crypto.tink.proto.Keyset;
import java.io.IOException;


A KeysetReader knows how to read a Keyset or an EncryptedKeyset from some source. 
Since:1.0.0
/**
 * A KeysetReader knows how to read a {@link Keyset} or an {@link EncryptedKeyset} from some source.
 *
 * @since 1.0.0
 */
public interface KeysetReader {
  
Tries to read and return a cleartext Keyset. 
Returns:the Keyset
/**
   * Tries to read and return a cleartext {@link Keyset}.
   *
   * @return the Keyset
   */
  Keyset read() throws IOException;

  
Tries to read and return an EncryptedKeyset. 
Returns:the EncryptedKeyset
/**
   * Tries to read and return an {@link EncryptedKeyset}.
   *
   * @return the EncryptedKeyset
   */
  EncryptedKeyset readEncrypted() throws IOException;
}