Record class property state (PropertyState)

By declaring the @PropertyState annotation on the class member variables and using the PropertyStateSupport tool class, you can easily monitor changes in class member attributes.

• @PropertyState annotation: declares to record changes in class member property values;

  propertyName: member property name, the default is empty and the current member name is used;

  aliasName: Custom alias, the default is empty;

  setterName: Member attribute SET method name, the default is empty;

• Sample code :

  public class PropertyStateTest {
  
      @PropertyState(propertyName = "user_name")
      private String username;
  
      @PropertyState(aliasName = "年龄")
      private int age;
  
      public String getUsername() {
          return username;
      }
  
      public void setUsername(String username) {
          this.username = username;
      }
  
      public int getAge() {
          return age;
      }
  
      public void setAge(int age) {
          this.age = age;
      }
  
      public static void main(String[] args) throws Exception {
          PropertyStateTest _original = new PropertyStateTest();
          _original.setUsername("123456");
          _original.setAge(20);
          //
          PropertyStateSupport<PropertyStateTest> _support = PropertyStateSupport.create(_original);
          PropertyStateTest _new = _support.bind();
          _new.setUsername("YMPer");
          _new.setAge(30);
          //
          System.out.println("发生变更的字段名集合: " + Arrays.asList(_support.getChangedPropertyNames()));
          for (PropertyStateSupport.PropertyStateMeta _meta : _support.getChangedProperties()) {
              System.out.println("已将" + StringUtils.defaultIfBlank(_meta.getAliasName(), _meta.getPropertyName()) + "由" + _meta.getOriginalValue() + "变更为" + _meta.getNewValue());
          }
      }
  }

• Execution result:

  发生变更的字段名集合: [user_name, age]
  已将user_name由123456变更为YMPer
  已将年龄由20变更为30