package us.codecraft.webmagic.model.fields;
   
   import java.lang.reflect.InvocationTargetException;
   
   import org.slf4j.Logger;
   
   import lombok.Getter;
   import us.codecraft.webmagic.model.FieldExtractor;
   
  public class SingleField extends PageField {
     @Getter
     private String fieldName; 
  
     public SingleField(String fieldName) {
        this.fieldName = fieldName;
     }
  
     public boolean operation(Object o, FieldExtractor fieldExtractor, Logger logger) throws IllegalAccessException, InvocationTargetException {
        if (fieldExtractor.getObjectFormatter() != null) {
           Object converted = this.convert(this.fieldName, fieldExtractor.getObjectFormatter(), logger);
           if (converted == null && fieldExtractor.isNotNull())
              return false;
           setField(o, fieldExtractor, converted);
        } else
           setField(o, fieldExtractor, this.fieldName);
        return true;
     }
  }