// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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package com.google.protobuf;

final class ExtensionSchemas {
  private static final ExtensionSchema<?> LITE_SCHEMA = new ExtensionSchemaLite();
  private static final ExtensionSchema<?> FULL_SCHEMA = loadSchemaForFullRuntime();

  private static ExtensionSchema<?> loadSchemaForFullRuntime() {
    try {
      Class<?> clazz = Class.forName("com.google.protobuf.ExtensionSchemaFull");
      return (ExtensionSchema) clazz.getDeclaredConstructor().newInstance();
    } catch (Exception e) {
      return null;
    }
  }

  static ExtensionSchema<?> lite() {
    return LITE_SCHEMA;
  }

  static ExtensionSchema<?> full() {
    if (FULL_SCHEMA == null) {
      throw new IllegalStateException("Protobuf runtime is not correctly loaded.");
    }
    return FULL_SCHEMA;
  }
}