java/core/src/main/java/com/google/protobuf/MapFieldSchemas.java

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
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package com.google.protobuf;

final class MapFieldSchemas {
  private static final MapFieldSchema FULL_SCHEMA = loadSchemaForFullRuntime();
  private static final MapFieldSchema LITE_SCHEMA = new MapFieldSchemaLite();

  static MapFieldSchema full() {
    return FULL_SCHEMA;
  }

  static MapFieldSchema lite() {
    return LITE_SCHEMA;
  }

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