程序包 org.springframework.web.servlet.support

类 BindStatus

  • public class BindStatus
extends Object
    Simple adapter to expose the bind status of a field or object. Set as a variable both by the JSP bind tag and Velocity/FreeMarker macros.

    Obviously, object status representations (i.e. errors at the object level rather than the field level) do not have an expression and a value but only error codes and messages. For simplicity's sake and to be able to use the same tags and macros, the same status class is used for both scenarios.

    作者:
    Rod Johnson, Juergen Hoeller, Darren Davison
    另请参阅:
    RequestContext.getBindStatus(java.lang.String), BindTag, AbstractTemplateView.setExposeSpringMacroHelpers(boolean)

    • 构造器详细资料

      • BindStatus

        public BindStatus​(RequestContext requestContext,
                  String path,
                  boolean htmlEscape)
           throws IllegalStateException
        Create a new BindStatus instance, representing a field or object status.
        参数:
        requestContext - the current RequestContext
        path - the bean and property path for which values and errors will be resolved (e.g. "customer.address.street")
        htmlEscape - whether to HTML-escape error messages and string values
        抛出:
        IllegalStateException - if no corresponding Errors object found

    • 方法详细资料

      • getPath

        public String getPath()
        Return the bean and property path for which values and errors will be resolved (e.g. "customer.address.street").

      • getExpression

        public String getExpression()
        Return a bind expression that can be used in HTML forms as input name for the respective field, or null if not field-specific.

        Returns a bind path appropriate for resubmission, e.g. "address.street". Note that the complete bind path as required by the bind tag is "customer.address.street", if bound to a "customer" bean.

      • getValue

        public Object getValue()
        Return the current value of the field, i.e. either the property value or a rejected update, or null if not field-specific.

        This value will be an HTML-escaped String if the original value already was a String.

      • getValueType

        public Class<?> getValueType()
        Get the 'Class' type of the field. Favor this instead of 'getValue().getClass()' since 'getValue()' may return 'null'.

      • getActualValue

        public Object getActualValue()
        Return the actual value of the field, i.e. the raw property value, or null if not available.

      • getDisplayValue

        public String getDisplayValue()
        Return a suitable display value for the field, i.e. the stringified value if not null, and an empty string in case of a null value.

        This value will be an HTML-escaped String if the original value was non-null: the toString result of the original value will get HTML-escaped.

      • isError

        public boolean isError()
        Return if this status represents a field or object error.

      • getErrorCodes

        public String[] getErrorCodes()
        Return the error codes for the field or object, if any. Returns an empty array instead of null if none.

      • getErrorCode

        public String getErrorCode()
        Return the first error codes for the field or object, if any.

      • getErrorMessages

        public String[] getErrorMessages()
        Return the resolved error messages for the field or object, if any. Returns an empty array instead of null if none.

      • getErrorMessage

        public String getErrorMessage()
        Return the first error message for the field or object, if any.

      • getErrorMessagesAsString

        public String getErrorMessagesAsString​(String delimiter)
        Return an error message string, concatenating all messages separated by the given delimiter.
        参数:
        delimiter - separator string, e.g. ", " or "
        "
        返回:
        the error message string

      • getErrors

        public Errors getErrors()
        Return the Errors instance (typically a BindingResult) that this bind status is currently associated with.
        返回:
        the current Errors instance, or null if none
        另请参阅:
        BindingResult

      • getEditor

        public PropertyEditor getEditor()
        Return the PropertyEditor for the property that this bind status is currently bound to.
        返回:
        the current PropertyEditor, or null if none

      • findEditor

        public PropertyEditor findEditor​(Class<?> valueClass)
        Find a PropertyEditor for the given value class, associated with the property that this bound status is currently bound to.
        参数:
        valueClass - the value class that an editor is needed for
        返回:
        the associated PropertyEditor, or null if none