code: /*
   * Copyright (C) 2008 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 tools.com.google.gson.internal;
  
  /**
   * A simple utility class used to check method Preconditions.
   *
   * <pre>
   * public long divideBy(long value) {
   *   Preconditions.checkArgument(value != 0);
   *   return this.value / value;
   * }
   * </pre>
   *
   * @author Inderjeet Singh
   * @author Joel Leitch
   */
  public final class $Gson$Preconditions {
    private $Gson$Preconditions() {
      throw new UnsupportedOperationException();
    }
  
    public static <T> T checkNotNull(T obj) {
      if (obj == null) {
        throw new NullPointerException();
      }
      return obj;
    }
  
    public static void checkArgument(boolean condition) {
      if (!condition) {
        throw new IllegalArgumentException();
      }
    }
  }
  