content: /*
   * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package openjdk.tools.javac.util;
  
  import java.util.function.Supplier;
  
  /**
   * Simple facility for unconditional assertions.
   * The methods in this class are described in terms of equivalent assert
   * statements, assuming that assertions have been enabled.
   *
   *  <p><b>This is NOT part of any supported API.
   *  If you write code that depends on this, you do so at your own risk.
   *  This code and its internal interfaces are subject to change or
   *  deletion without notice.</b>
   */
  public class Assert {
      /** Equivalent to
       *   assert cond;
       */
      public static void check(boolean cond) {
          if (!cond)
              error();
      }
  
      /** Equivalent to
       *   assert (o == null);
       */
      public static void checkNull(Object o) {
          if (o != null)
              error();
      }
  
      /** Equivalent to
       *   assert (t != null); return t;
       */
      public static <T> T checkNonNull(T t) {
          if (t == null)
              error();
          return t;
      }
  
      /** Equivalent to
       *   assert cond : value;
       */
      public static void check(boolean cond, int value) {
          if (!cond)
              error(String.valueOf(value));
      }
  
      /** Equivalent to
       *   assert cond : value;
       */
      public static void check(boolean cond, long value) {
          if (!cond)
              error(String.valueOf(value));
      }
  
      /** Equivalent to
       *   assert cond : value;
       */
      public static void check(boolean cond, Object value) {
          if (!cond)
              error(String.valueOf(value));
      }
  
      /** Equivalent to
       *   assert cond : msg;
       */
      public static void check(boolean cond, String msg) {
          if (!cond)
              error(msg);
      }
  
      /** Equivalent to
       *   assert cond : msg.get();
       *  Note: message string is computed lazily.
       */
      public static void check(boolean cond, Supplier<String> msg) {
          if (!cond)
              error(msg.get());
      }
  
      /** Equivalent to
       *   assert (o == null) : value;
       */
      public static void checkNull(Object o, Object value) {
          if (o != null)
              error(String.valueOf(value));
      }
  
      /** Equivalent to
       *   assert (o == null) : msg;
       */
      public static void checkNull(Object o, String msg) {
          if (o != null)
              error(msg);
      }
  
      /** Equivalent to
       *   assert (o == null) : msg.get();
       *  Note: message string is computed lazily.
       */
      public static void checkNull(Object o, Supplier<String> msg) {
          if (o != null)
              error(msg.get());
      }
  
      /** Equivalent to
       *   assert (o != null) : msg;
       */
      public static <T> T checkNonNull(T t, String msg) {
          if (t == null)
              error(msg);
          return t;
      }
  
      /** Equivalent to
       *   assert (o != null) : msg.get();
       *  Note: message string is computed lazily.
       */
      public static <T> T checkNonNull(T t, Supplier<String> msg) {
          if (t == null)
              error(msg.get());
          return t;
      }
  
      /** Equivalent to
       *   assert false;
       */
      public static void error() {
          throw new AssertionError();
      }
  
      /** Equivalent to
       *   assert false : msg;
       */
      public static void error(String msg) {
          throw new AssertionError(msg);
      }
  
      /** Prevent instantiation. */
      private Assert() { }
  }
  