leakcanary-watcher/src/main/java/com/squareup/leakcanary/Preconditions.java

/*
 * Copyright (C) 2015 Square, 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.squareup.leakcanary;

final class Preconditions {

  /**
   * Returns instance unless it's null.
   *
   * @throws NullPointerException if instance is null
   */
  static <T> T checkNotNull(T instance, String name) {
    if (instance == null) {
      throw new NullPointerException(name + " must not be null");
    }
    return instance;
  }

  private Preconditions() {
    throw new AssertionError();
  }
}