content: package com.alibaba.fastjson.serializer;
  
  import java.util.HashSet;
  import java.util.Set;
  
  public class SimplePropertyPreFilter implements PropertyPreFilter {
  
      private final Class<?>    clazz;
      private final Set<String> includes = new HashSet<String>();
      private final Set<String> excludes = new HashSet<String>();
  
      public SimplePropertyPreFilter(String... properties){
          this(null, properties);
      }
  
      public SimplePropertyPreFilter(Class<?> clazz, String... properties){
          super();
          this.clazz = clazz;
          for (String item : properties) {
              if (item != null) {
                  this.includes.add(item);
              }
          }
      }
  
      public Class<?> getClazz() {
          return clazz;
      }
  
      public Set<String> getIncludes() {
          return includes;
      }
  
      public Set<String> getExcludes() {
          return excludes;
      }
  
      public boolean apply(JSONSerializer serializer, Object source, String name) {
          if (source == null) {
              return true;
          }
  
          if (clazz != null && !clazz.isInstance(source)) {
              return true;
          }
  
          if (this.excludes.contains(name)) {
              return false;
          }
  
          if (includes.size() == 0 || includes.contains(name)) {
              return true;
          }
  
          return false;
      }
  
  }
  