content: /*
   * Copyright 1999-2018 Alibaba Group.
   *
   * 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.
   */
  package com.alibaba.fastjson.serializer;
  
  import java.util.Arrays;
  
  /**
   * @author wenshao[szujobs@hotmail.com]
   */
  public class Labels {
  
      private static class DefaultLabelFilter implements LabelFilter {
  
          private String[] includes;
          private String[] excludes;
  
          public DefaultLabelFilter(String[] includes, String[] excludes){
              if (includes != null) {
                  this.includes = new String[includes.length];
                  System.arraycopy(includes, 0, this.includes, 0, includes.length);
                  Arrays.sort(this.includes);
              }
              if (excludes != null) {
                  this.excludes = new String[excludes.length];
                  System.arraycopy(excludes, 0, this.excludes, 0, excludes.length);
                  Arrays.sort(this.excludes);
              }
          }
  
          public boolean apply(String label) {
              if (excludes != null) {
                  return Arrays.binarySearch(excludes, label) < 0;
              }
  
              return includes != null // 
                      && Arrays.binarySearch(includes, label) >= 0;
          }
      }
  
      public static LabelFilter includes(String... views) {
          return new DefaultLabelFilter(views, null);
      }
  
      public static LabelFilter excludes(String... views) {
          return new DefaultLabelFilter(null, views);
      }
  }
  