text: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.netbeans.modules.web.common.cssprep;
  
  import org.netbeans.modules.web.common.api.CssPreprocessor;
  import org.netbeans.modules.web.common.spi.CssPreprocessorImplementation;
  
  public abstract class CssPreprocessorAccessor {
  
      private static volatile CssPreprocessorAccessor accessor;
  
  
      public static synchronized CssPreprocessorAccessor getDefault() {
          if (accessor != null) {
              return accessor;
          }
          Class<?> c = CssPreprocessor.class;
          try {
              Class.forName(c.getName(), true, c.getClassLoader());
          } catch (ClassNotFoundException ex) {
              assert false : ex;
          }
          assert accessor != null;
          return accessor;
      }
  
      public static void setDefault(CssPreprocessorAccessor accessor) {
          if (CssPreprocessorAccessor.accessor != null) {
              throw new IllegalStateException("Already initialized accessor");
          }
          CssPreprocessorAccessor.accessor = accessor;
      }
  
  
      public abstract CssPreprocessor create(CssPreprocessorImplementation cssPreprocessorImplementation);
  
  }
  