code: ///////////////////////////////////////////////////////////////////////////////////////////////
  // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
  // Copyright (C) 2001-2023 the original author or authors.
  //
  // This library is free software; you can redistribute it and/or
  // modify it under the terms of the GNU Lesser General Public
  // License as published by the Free Software Foundation; either
  // version 2.1 of the License, or (at your option) any later version.
  //
  // This library 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
  // Lesser General Public License for more details.
  //
  // You should have received a copy of the GNU Lesser General Public
  // License along with this library; if not, write to the Free Software
  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  ///////////////////////////////////////////////////////////////////////////////////////////////
  
  package com.sun.checkstyle.test.base;
  
  import java.io.IOException;
  import java.util.Set;
  
  import org.checkstyle.base.AbstractItModuleTestSupport;
  
  import com.puppycrawl.tools.checkstyle.ConfigurationLoader;
  import com.puppycrawl.tools.checkstyle.PropertiesExpander;
  import com.puppycrawl.tools.checkstyle.api.CheckstyleException;
  import com.puppycrawl.tools.checkstyle.api.Configuration;
  import com.puppycrawl.tools.checkstyle.internal.utils.CheckUtil;
  import com.puppycrawl.tools.checkstyle.utils.ModuleReflectionUtil;
  
  public abstract class AbstractSunModuleTestSupport extends AbstractItModuleTestSupport {
  
      private static final String XML_NAME = "/sun_checks.xml";
  
      private static final Configuration CONFIGURATION;
  
      private static final Set<Class<?>> CHECKSTYLE_MODULES;
  
      static {
          try {
              CONFIGURATION = ConfigurationLoader.loadConfiguration(XML_NAME,
                      new PropertiesExpander(System.getProperties()));
          }
          catch (CheckstyleException ex) {
              throw new IllegalStateException(ex);
          }
          try {
              CHECKSTYLE_MODULES = CheckUtil.getCheckstyleModules();
          }
          catch (IOException ex) {
              throw new IllegalStateException(ex);
          }
      }
  
      @Override
      protected ModuleCreationOption findModuleCreationOption(String moduleName) {
          ModuleCreationOption moduleCreationOption = ModuleCreationOption.IN_CHECKER;
  
          for (Class<?> moduleClass : CHECKSTYLE_MODULES) {
              if (moduleClass.getSimpleName().equals(moduleName)
                      || moduleClass.getSimpleName().equals(moduleName + "Check")) {
                  if (ModuleReflectionUtil.isCheckstyleTreeWalkerCheck(moduleClass)
                          || ModuleReflectionUtil.isTreeWalkerFilterModule(moduleClass)) {
                      moduleCreationOption = ModuleCreationOption.IN_TREEWALKER;
                  }
                  break;
              }
          }
  
          return moduleCreationOption;
      }
  
      /**
       * Returns {@link Configuration} instance for the given module name.
       * This implementation uses {@link #getModuleConfig(String, String)} method inside.
       *
       * @param moduleName module name.
       * @return {@link Configuration} instance for the given module name.
       */
      protected static Configuration getModuleConfig(String moduleName) {
          return getModuleConfig(moduleName, null);
      }
  
      /**
       * Returns {@link Configuration} instance for the given module name.
       * This implementation uses {@link #getModuleConfig(String)} method inside.
       *
       * @param moduleName module name.
       * @param moduleId module id.
       * @return {@link Configuration} instance for the given module name.
       * @throws IllegalStateException if there is a problem retrieving the module or config.
       */
      protected static Configuration getModuleConfig(String moduleName, String moduleId) {
          return getModuleConfig(CONFIGURATION, moduleName, moduleId);
      }
  
  }
  