content: /**
   * Copyright (c) 2013, Andre Steingress
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
   * following conditions are met:
   *
   * 1.) Redistributions of source code must retain the above copyright notice, this list of conditions and the following
   * disclaimer.
   * 2.) Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
   * disclaimer in the documentation and/or other materials provided with the distribution.
   * 3.) Neither the name of Andre Steingress nor the names of its contributors may be used to endorse or
   * promote products derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
   * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package org.gcontracts.generation;
  
  import java.lang.management.ManagementFactory;
  import java.lang.management.RuntimeMXBean;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * <p>Handles {@code -ea} and {@code -da} runtime input arguments for enabling and
   * disabling contract elements.</p>
   *
   * @author ast
   */
  public final class Configurator {
  
      public static final String DISABLED_ASSERTIONS = "-da";
      public static final String ENABLED_ASSERTIONS = "-ea";
  
      public static final String PACKAGE_PREFIX = ":";
      public static final String ENABLE_PACKAGE_ASSERTIONS = ENABLED_ASSERTIONS + PACKAGE_PREFIX;
      public static final String DISABLE_PACKAGE_ASSERTIONS = DISABLED_ASSERTIONS + PACKAGE_PREFIX;
      public static final String PACKAGE_POSTFIX = "...";
      
      private static Map<String, Boolean> assertionConfiguration;
  
      static {
          initAssertionConfiguration();
      }
  
      private static void initAssertionConfiguration()  {
  
          assertionConfiguration = new HashMap<String, Boolean>();
          // per default assertion are enabled (Groovy like)
          assertionConfiguration.put(null, Boolean.TRUE);
  
          RuntimeMXBean runtimemxBean = ManagementFactory.getRuntimeMXBean();
          for (String arg : runtimemxBean.getInputArguments())  {
              if (DISABLED_ASSERTIONS.equals(arg))  {
                  assertionConfiguration.put(null, Boolean.FALSE);
  
              } else if (arg.startsWith(ENABLE_PACKAGE_ASSERTIONS) && arg.endsWith(PACKAGE_POSTFIX))  {
                  final String packageName = arg.substring(ENABLE_PACKAGE_ASSERTIONS.length(), arg.length() - PACKAGE_POSTFIX.length());
                  assertionConfiguration.put(packageName, Boolean.TRUE);
  
              } else if (arg.startsWith(DISABLE_PACKAGE_ASSERTIONS) && arg.endsWith(PACKAGE_POSTFIX))  {
                  final String packageName = arg.substring(DISABLE_PACKAGE_ASSERTIONS.length(), arg.length() - PACKAGE_POSTFIX.length());
  
                  assertionConfiguration.put(packageName, Boolean.FALSE);
              } else if (arg.startsWith(ENABLE_PACKAGE_ASSERTIONS))  {
                  final String className = arg.substring(ENABLE_PACKAGE_ASSERTIONS.length(), arg.length());
                  assertionConfiguration.put(className, Boolean.TRUE);
  
              } else if (arg.startsWith(DISABLE_PACKAGE_ASSERTIONS))  {
                  final String className = arg.substring(DISABLE_PACKAGE_ASSERTIONS.length(), arg.length());
  
                  assertionConfiguration.put(className, Boolean.FALSE);
              }
          }
      }
  
      /**
       * This static method is used within generated code to check whether assertions have been disabled for the current class or not.
       *
       * @param className the class name to look up in the assertion configuration
       * @return whether assertion checking is enabled or not
       */
      public static boolean checkAssertionsEnabled(final String className)  {
          return internalMethod(className);
      }
  
      private static boolean internalMethod(String className) {
          if (className == null || className.length() == 0) return false;
  
          if (assertionConfiguration.containsKey(className)) return assertionConfiguration.get(className);
          if (className.lastIndexOf('.') < 0) return assertionConfiguration.get(null);
  
          String packageName = className.substring(0, className.lastIndexOf('.'));
  
          while (!assertionConfiguration.containsKey(packageName))  {
              int dotIndex = packageName.lastIndexOf('.');
              if (dotIndex < 0) return assertionConfiguration.get(null);
  
              packageName = packageName.substring(0, dotIndex);
          }
  
          if (assertionConfiguration.containsKey(packageName)) return assertionConfiguration.get(packageName);
  
          return assertionConfiguration.get(null);
      }
  }
  