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A set of utilities for classes of the java.lang and the java.util packages.
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/*
 * Copyright (C) 2007 The Guava Authors
 *
 * 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.
 *
 * Modifications:
 *
 * Copyright (C) 2011-2021 Objectos Software LTDA.
 *
 * This file is part of the ObjectosComuns project.
 *
 * ObjectosComuns is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * ObjectosComuns 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with ObjectosComuns.  If not, see .
 */
package br.com.objectos.lang;

/**
 * A streamlined version of Google Guava's Preconditions.
 *
 * Contains only the methods that are currently being used at Objectos Software.
 *
 * @author Kevin Bourrillion (original Guava version)
 */
final class Preconditions {

  private Preconditions() {}

  public static void checkArgument(boolean expression) {
    if (!expression) {
      throw new IllegalArgumentException();
    }
  }

  public static void checkArgument(boolean expression, String message) {
    if (!expression) {
      throw new IllegalArgumentException(message);
    }
  }

  public static void checkArgument(boolean expression, String format, Object... args) {
    if (!expression) {
      throw new IllegalArgumentException(String.format(format, args));
    }
  }

  public static  T checkNotNull(T reference) {
    if (reference == null) {
      throw new NullPointerException();
    }
    return reference;
  }

  public static  T checkNotNull(T reference, String message) {
    if (reference == null) {
      throw new NullPointerException(message);
    }
    return reference;
  }

  public static  T checkNotNull(T reference, String format, Object... args) {
    if (reference == null) {
      String message = String.format(format, args);
      throw new NullPointerException(message);
    }
    return reference;
  }

  public static void checkState(boolean state) {
    if (!state) {
      throw new IllegalStateException();
    }
  }

  public static void checkState(boolean state, String message) {
    if (!state) {
      throw new IllegalStateException(message);
    }
  }

}