Examples of org.springframework.validation.DefaultMessageCodesResolver

org.springframework.validation.DefaultMessageCodesResolver
Default implementation of the {@link MessageCodesResolver} interface.
Will create two message codes for an object error, in the following order:
- 1.: code + "." + object name
- 2.: code
Will create four message codes for a field specification, in the following order:
- 1.: code + "." + object name + "." + field
- 2.: code + "." + field
- 3.: code + "." + field type
- 4.: code
For example, in case of code "typeMismatch", object name "user", field "age":
- 1. try "typeMismatch.user.age"
- 2. try "typeMismatch.age"
- 3. try "typeMismatch.int"
- 4. try "typeMismatch"
This resolution algorithm thus can be leveraged for example to show specific messages for binding errors like "required" and "typeMismatch":
- at the object + field level ("age" field, but only on "user");
- at the field level (all "age" fields, no matter which object name);
- or at the general level (all fields, on any object).
In case of array, {@link List} or {@link java.util.Map} properties,both codes for specific elements and for the whole collection are generated. Assuming a field "name" of an array "groups" in object "user":
- 1. try "typeMismatch.user.groups[0].name"
- 2. try "typeMismatch.user.groups.name"
- 3. try "typeMismatch.groups[0].name"
- 4. try "typeMismatch.groups.name"
- 5. try "typeMismatch.name"
- 6. try "typeMismatch.java.lang.String"
- 7. try "typeMismatch"
In order to group all codes into a specific category within your resource bundles, e.g. "validation.typeMismatch.name" instead of the default "typeMismatch.name", consider specifying a {@link #setPrefix prefix} to be applied. @author Juergen Hoeller @since 1.0.1


    /**
     * Constructs a new ModelAwareErrorCodeConverter with {@link DefaultMessageCodesResolver} as the internal resolver.
     */
    public ModelAwareMessageCodesResolver() {
        this(new DefaultMessageCodesResolver());
    }

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    /**
     * Constructs a new ModelAwareErrorCodeConverter with {@link DefaultMessageCodesResolver} as the internal resolver.
     */
    public ModelAwareMessageCodesResolver() {
        this(new DefaultMessageCodesResolver());
    }

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  protected void setUp() throws Exception {
    requestContext = new MockRequestControlContext();
    eventId = "userEvent";
    modelName = "model";
    codesResolver = new DefaultMessageCodesResolver();
  }

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    messageSource.addMessage("bar", Locale.getDefault(), "{0}");


    context = new DefaultMessageContext(messageSource);


    SpringELExpressionParser parser = new SpringELExpressionParser(new SpelExpressionParser());
    DefaultMessageCodesResolver resolver = new DefaultMessageCodesResolver();
    errors = new MessageContextErrors(context, "object", new Object(), parser, resolver, null);
  }

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    verify(webMvcConfigurer).getValidator();
  }


  @Test
  public void getCustomMessageCodesResolver() {
    given(webMvcConfigurer.getMessageCodesResolver()).willReturn(new DefaultMessageCodesResolver());


    delegatingConfig.setConfigurers(Arrays.asList(webMvcConfigurer));
    delegatingConfig.getMessageCodesResolver();


    verify(webMvcConfigurer).getMessageCodesResolver();

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    }


    @SuppressWarnings("serial")
    @Override
    public MessageCodesResolver getMessageCodesResolver() {
      return new DefaultMessageCodesResolver() {
        @Override
        public String[] resolveMessageCodes(String errorCode, String objectName) {
          return new String[] { "custom." + errorCode };
        }
      };

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    }


    @Override
    public MessageCodesResolver getMessageCodesResolver() {
      if (this.mvcProperties.getMessageCodesResolverFormat() != null) {
        DefaultMessageCodesResolver resolver = new DefaultMessageCodesResolver();
        resolver.setMessageCodeFormatter(this.mvcProperties
            .getMessageCodesResolverFormat());
        return resolver;
      }
      return null;
    }

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