org.springframework.web.servlet.support
Class BindStatus

java.lang.Object
  org.springframework.web.servlet.support.BindStatus

public class BindStatus
extends java.lang.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.

Author:

Rod Johnson, Juergen Hoeller, Darren Davison

See Also:

RequestContext.getBindStatus(java.lang.String), BindTag, AbstractTemplateView.setExposeSpringMacroHelpers(boolean)

Field Summary

private java.lang.Object	actualValue
private BindingResult	bindingResult
private java.beans.PropertyEditor	editor
private java.lang.String[]	errorCodes
private java.lang.String[]	errorMessages
private Errors	errors
private java.lang.String	expression
private boolean	htmlEscape
private java.util.List	objectErrors
private java.lang.String	path
private RequestContext	requestContext
private java.lang.Object	value
private java.lang.Class	valueType

Constructor Summary

BindStatus(RequestContext requestContext, java.lang.String path, boolean htmlEscape)
Create a new BindStatus instance, representing a field or object status.

Method Summary

java.beans.PropertyEditor	findEditor(java.lang.Class valueClass) Find a PropertyEditor for the given value class, associated with the property that this bound status is currently bound to.
java.lang.Object	getActualValue() Return the actual value of the field, i.e.
java.lang.String	getDisplayValue() Return a suitable display value for the field, i.e.
java.beans.PropertyEditor	getEditor() Return the PropertyEditor for the property that this bind status is currently bound to.
java.lang.String	getErrorCode() Return the first error codes for the field or object, if any.
java.lang.String[]	getErrorCodes() Return the error codes for the field or object, if any.
java.lang.String	getErrorMessage() Return the first error message for the field or object, if any.
java.lang.String[]	getErrorMessages() Return the resolved error messages for the field or object, if any.
java.lang.String	getErrorMessagesAsString(java.lang.String delimiter) Return an error message string, concatenating all messages separated by the given delimiter.
Errors	getErrors() Return the Errors instance (typically a BindingResult) that this bind status is currently associated with.
java.lang.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.
java.lang.String	getPath() Return the bean and property path for which values and errors will be resolved (e.g.
java.lang.Object	getValue() Return the current value of the field, i.e.
java.lang.Class	getValueType() Get the 'Class' type of the field.
private void	initErrorCodes() Extract the error codes from the ObjectError list.
private void	initErrorMessages() Extract the error messages from the ObjectError list.
boolean	isError() Return if this status represents a field or object error.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

requestContext

private final RequestContext requestContext

path

private final java.lang.String path

htmlEscape

private final boolean htmlEscape

expression

private final java.lang.String expression

errors

private final Errors errors

bindingResult

private BindingResult bindingResult

value

private java.lang.Object value

valueType

private java.lang.Class valueType

actualValue

private java.lang.Object actualValue

editor

private java.beans.PropertyEditor editor

objectErrors

private java.util.List objectErrors

errorCodes

private java.lang.String[] errorCodes

errorMessages

private java.lang.String[] errorMessages

Constructor Detail

BindStatus

public BindStatus(RequestContext requestContext,
                  java.lang.String path,
                  boolean htmlEscape)
           throws java.lang.IllegalStateException

Create a new BindStatus instance, representing a field or object status.

Parameters:

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

Throws:

java.lang.IllegalStateException - if no corresponding Errors object found

Method Detail

initErrorCodes

private void initErrorCodes()

Extract the error codes from the ObjectError list.

initErrorMessages

private void initErrorMessages()
                        throws NoSuchMessageException

Extract the error messages from the ObjectError list.

Throws:

NoSuchMessageException

getPath

public java.lang.String getPath()

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

getExpression

public java.lang.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 java.lang.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 java.lang.Class getValueType()

Get the 'Class' type of the field. Favor this instead of 'getValue().getClass()' since 'getValue()' may return 'null'.

getActualValue

public java.lang.Object getActualValue()

Return the actual value of the field, i.e. the raw property value, or null if not available.

getDisplayValue

public java.lang.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 java.lang.String[] getErrorCodes()

Return the error codes for the field or object, if any. Returns an empty array instead of null if none.

getErrorCode

public java.lang.String getErrorCode()

Return the first error codes for the field or object, if any.

getErrorMessages

public java.lang.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 java.lang.String getErrorMessage()

Return the first error message for the field or object, if any.

getErrorMessagesAsString

public java.lang.String getErrorMessagesAsString(java.lang.String delimiter)

Return an error message string, concatenating all messages separated by the given delimiter.

Parameters:

delimiter - separator string, e.g. ", " or "
"

Returns:

the error message string

getErrors

public Errors getErrors()

Return the Errors instance (typically a BindingResult) that this bind status is currently associated with.

Returns:

the current Errors instance, or null if none

See Also:

BindingResult

getEditor

public java.beans.PropertyEditor getEditor()

Return the PropertyEditor for the property that this bind status is currently bound to.

Returns:

the current PropertyEditor, or null if none

findEditor

public java.beans.PropertyEditor findEditor(java.lang.Class valueClass)

Find a PropertyEditor for the given value class, associated with the property that this bound status is currently bound to.

Parameters:

valueClass - the value class that an editor is needed for

Returns:

the associated PropertyEditor, or null if none

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object