play.data

Class Form<T>

java.lang.Object

play.data.Form<T>

Direct Known Subclasses:

DynamicForm

public class Form<T>
extends java.lang.Object

Helper to manage HTML form description, submission and validation.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Form.Display Defines a form element's display name.
static class	Form.Field A form field.

Constructor Summary

Constructors

Constructor and Description
Form(java.lang.Class<T> clazz, MessagesApi messagesApi, Formatters formatters, javax.validation.Validator validator) Creates a new Form.
Form(java.lang.String rootName, java.lang.Class<T> clazz, java.lang.Class<?>[] groups, MessagesApi messagesApi, Formatters formatters, javax.validation.Validator validator)
Form(java.lang.String rootName, java.lang.Class<T> clazz, java.lang.Class<?> group, MessagesApi messagesApi, Formatters formatters, javax.validation.Validator validator)
Form(java.lang.String rootName, java.lang.Class<T> clazz, java.util.Map<java.lang.String,java.lang.String> data, java.util.Map<java.lang.String,java.util.List<ValidationError>> errors, java.util.Optional<T> value, java.lang.Class<?>[] groups, MessagesApi messagesApi, Formatters formatters, javax.validation.Validator validator) Creates a new Form.
Form(java.lang.String rootName, java.lang.Class<T> clazz, java.util.Map<java.lang.String,java.lang.String> data, java.util.Map<java.lang.String,java.util.List<ValidationError>> errors, java.util.Optional<T> value, java.lang.Class<?> group, MessagesApi messagesApi, Formatters formatters, javax.validation.Validator validator)
Form(java.lang.String rootName, java.lang.Class<T> clazz, java.util.Map<java.lang.String,java.lang.String> data, java.util.Map<java.lang.String,java.util.List<ValidationError>> errors, java.util.Optional<T> value, MessagesApi messagesApi, Formatters formatters, javax.validation.Validator validator)
Form(java.lang.String rootName, java.lang.Class<T> clazz, MessagesApi messagesApi, Formatters formatters, javax.validation.Validator validator)

Method Summary

Modifier and Type	Method and Description
Form.Field	apply(java.lang.String key) Retrieve a field.
Form<T>	bind(com.fasterxml.jackson.databind.JsonNode data, java.lang.String... allowedFields) Binds Json data to this form - that is, handles form submission.
Form<T>	bind(java.util.Map<java.lang.String,java.lang.String> data, java.lang.String... allowedFields) Binds data to this form - that is, handles form submission.
Form<T>	bindFromRequest(Http.Request request, java.lang.String... allowedFields) Binds request data to this form - that is, handles form submission.
Form<T>	bindFromRequest(java.util.Map<java.lang.String,java.lang.String[]> requestData, java.lang.String... allowedFields) Binds request data to this form - that is, handles form submission.
Form<T>	bindFromRequest(java.lang.String... allowedFields) Binds request data to this form - that is, handles form submission.
protected T	blankInstance()
java.util.Map<java.lang.String,java.lang.String>	data() Retrieves the actual form data.
void	discardErrors() Discard errors of this form
ValidationError	error(java.lang.String key) Retrieve an error by key.
java.util.Map<java.lang.String,java.util.List<ValidationError>>	errors() Returns all errors.
com.fasterxml.jackson.databind.JsonNode	errorsAsJson() Returns the form errors serialized as Json.
com.fasterxml.jackson.databind.JsonNode	errorsAsJson(Lang lang) Returns the form errors serialized as Json using the given Lang.
Form.Field	field(java.lang.String key) Retrieve a field.
Form<T>	fill(T value) Populates this form with an existing value, used for edit forms.
static DynamicForm	form() Deprecated. inject a FormFactory instead, since 2.5.0
static <T> Form<T>	form(java.lang.Class<T> clazz) Deprecated. inject a FormFactory instead, since 2.5.0
static <T> Form<T>	form(java.lang.Class<T> clazz, java.lang.Class<?>... groups) Deprecated.
static <T> Form<T>	form(java.lang.Class<T> clazz, java.lang.Class<?> group) Deprecated. inject a FormFactory instead, since 2.5.0
static <T> Form<T>	form(java.lang.String name, java.lang.Class<T> clazz) Deprecated. inject a FormFactory instead, since 2.5.0
static <T> Form<T>	form(java.lang.String name, java.lang.Class<T> clazz, java.lang.Class<?>... groups) Deprecated.
static <T> Form<T>	form(java.lang.String name, java.lang.Class<T> clazz, java.lang.Class<?> group) Deprecated. inject a FormFactory instead, since 2.5.0
T	get() Gets the concrete value only if the submission was a success.
protected java.lang.Object[]	getArgumentsForConstraint(java.lang.String objectName, java.lang.String field, javax.validation.metadata.ConstraintDescriptor<?> descriptor)
java.lang.Class<T>	getBackedType()
protected java.lang.String	getMessageForConstraintViolation(javax.validation.ConstraintViolation<java.lang.Object> violation) When dealing with @ValidateWith annotations, and message parameter is not used in the annotation, extract the message from validator's getErrorMessageKey() method
ValidationError	globalError() Retrieves the first global error (an error without any key), if it exists.
java.util.List<ValidationError>	globalErrors() Retrieve all global errors - errors without a key.
boolean	hasErrors() Returns true if there are any errors related to this form.
boolean	hasGlobalErrors() Returns true if there any global errors related to this form.
java.lang.String	name()
void	reject(java.lang.String error) Add a global error to this form.
void	reject(java.lang.String error, java.util.List<java.lang.Object> args) Adds a global error to this form.
void	reject(java.lang.String key, java.lang.String error) Adds an error to this form.
void	reject(java.lang.String key, java.lang.String error, java.util.List<java.lang.Object> args) Adds an error to this form.
void	reject(ValidationError error) Adds an error to this form.
protected java.util.Map<java.lang.String,java.lang.String>	requestData(Http.Request request)
java.lang.String	toString()
java.util.Optional<T>	value() Retrieves the actual form value - even when the form contains validation errors.

Methods inherited from class java.lang.Object

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

Constructor Detail

Form

public Form(java.lang.Class<T> clazz,
            MessagesApi messagesApi,
            Formatters formatters,
            javax.validation.Validator validator)

Creates a new Form.

Parameters:

clazz - wrapped class

Form

public Form(java.lang.String rootName,
            java.lang.Class<T> clazz,
            MessagesApi messagesApi,
            Formatters formatters,
            javax.validation.Validator validator)

Form

public Form(java.lang.String rootName,
            java.lang.Class<T> clazz,
            java.lang.Class<?> group,
            MessagesApi messagesApi,
            Formatters formatters,
            javax.validation.Validator validator)

Form

public Form(java.lang.String rootName,
            java.lang.Class<T> clazz,
            java.lang.Class<?>[] groups,
            MessagesApi messagesApi,
            Formatters formatters,
            javax.validation.Validator validator)

Form

public Form(java.lang.String rootName,
            java.lang.Class<T> clazz,
            java.util.Map<java.lang.String,java.lang.String> data,
            java.util.Map<java.lang.String,java.util.List<ValidationError>> errors,
            java.util.Optional<T> value,
            MessagesApi messagesApi,
            Formatters formatters,
            javax.validation.Validator validator)

Form

public Form(java.lang.String rootName,
            java.lang.Class<T> clazz,
            java.util.Map<java.lang.String,java.lang.String> data,
            java.util.Map<java.lang.String,java.util.List<ValidationError>> errors,
            java.util.Optional<T> value,
            java.lang.Class<?> group,
            MessagesApi messagesApi,
            Formatters formatters,
            javax.validation.Validator validator)

Form

public Form(java.lang.String rootName,
            java.lang.Class<T> clazz,
            java.util.Map<java.lang.String,java.lang.String> data,
            java.util.Map<java.lang.String,java.util.List<ValidationError>> errors,
            java.util.Optional<T> value,
            java.lang.Class<?>[] groups,
            MessagesApi messagesApi,
            Formatters formatters,
            javax.validation.Validator validator)

Creates a new Form.

Parameters:

clazz - wrapped class

data - the current form data (used to display the form)

errors - the collection of errors associated with this form

value - optional concrete value of type T if the form submission was successful

messagesApi - needed to look up various messages

formatters - used for parsing and printing form fields

Method Detail

form

@Deprecated
public static DynamicForm form()

Deprecated. inject a FormFactory instead, since 2.5.0

Instantiates a dynamic form.

form

@Deprecated
public static <T> Form<T> form(java.lang.Class<T> clazz)

Deprecated. inject a FormFactory instead, since 2.5.0

Instantiates a new form that wraps the specified class.

form

@Deprecated
public static <T> Form<T> form(java.lang.String name,
                                           java.lang.Class<T> clazz)

Deprecated. inject a FormFactory instead, since 2.5.0

Instantiates a new form that wraps the specified class.

form

@Deprecated
public static <T> Form<T> form(java.lang.String name,
                                           java.lang.Class<T> clazz,
                                           java.lang.Class<?> group)

Deprecated. inject a FormFactory instead, since 2.5.0

Instantiates a new form that wraps the specified class.

form

@Deprecated
public static <T> Form<T> form(java.lang.String name,
                                           java.lang.Class<T> clazz,
                                           java.lang.Class<?>... groups)

Deprecated.

form

@Deprecated
public static <T> Form<T> form(java.lang.Class<T> clazz,
                                           java.lang.Class<?> group)

Deprecated. inject a FormFactory instead, since 2.5.0

Instantiates a new form that wraps the specified class.

form

@Deprecated
public static <T> Form<T> form(java.lang.Class<T> clazz,
                                           java.lang.Class<?>... groups)

Deprecated.

getBackedType

public java.lang.Class<T> getBackedType()

blankInstance

protected T blankInstance()

requestData

protected java.util.Map<java.lang.String,java.lang.String> requestData(Http.Request request)

bindFromRequest

public Form<T> bindFromRequest(java.lang.String... allowedFields)

Binds request data to this form - that is, handles form submission.

Returns:

a copy of this form filled with the new data

bindFromRequest

public Form<T> bindFromRequest(Http.Request request,
                               java.lang.String... allowedFields)

Binds request data to this form - that is, handles form submission.

Returns:

a copy of this form filled with the new data

bindFromRequest

public Form<T> bindFromRequest(java.util.Map<java.lang.String,java.lang.String[]> requestData,
                               java.lang.String... allowedFields)

Binds request data to this form - that is, handles form submission.

Returns:

a copy of this form filled with the new data

bind

public Form<T> bind(com.fasterxml.jackson.databind.JsonNode data,
                    java.lang.String... allowedFields)

Binds Json data to this form - that is, handles form submission.

Parameters:

data - data to submit

Returns:

a copy of this form filled with the new data

getArgumentsForConstraint

protected java.lang.Object[] getArgumentsForConstraint(java.lang.String objectName,
                                                       java.lang.String field,
                                                       javax.validation.metadata.ConstraintDescriptor<?> descriptor)

getMessageForConstraintViolation

protected java.lang.String getMessageForConstraintViolation(javax.validation.ConstraintViolation<java.lang.Object> violation)

When dealing with @ValidateWith annotations, and message parameter is not used in the annotation, extract the message from validator's getErrorMessageKey() method

bind

public Form<T> bind(java.util.Map<java.lang.String,java.lang.String> data,
                    java.lang.String... allowedFields)

Binds data to this form - that is, handles form submission.

Parameters:

data - data to submit

Returns:

a copy of this form filled with the new data

data

public java.util.Map<java.lang.String,java.lang.String> data()

Retrieves the actual form data.

name

public java.lang.String name()

value

public java.util.Optional<T> value()

Retrieves the actual form value - even when the form contains validation errors.

fill

public Form<T> fill(T value)

Populates this form with an existing value, used for edit forms.

Parameters:

value - existing value of type T used to fill this form

Returns:

a copy of this form filled with the new data

hasErrors

public boolean hasErrors()

Returns true if there are any errors related to this form.

hasGlobalErrors

public boolean hasGlobalErrors()

Returns true if there any global errors related to this form.

globalErrors

public java.util.List<ValidationError> globalErrors()

Retrieve all global errors - errors without a key.

Returns:

All global errors.

globalError

public ValidationError globalError()

Retrieves the first global error (an error without any key), if it exists.

Returns:

An error or null.

errors

public java.util.Map<java.lang.String,java.util.List<ValidationError>> errors()

Returns all errors.

Returns:

All errors associated with this form.

error

public ValidationError error(java.lang.String key)

Retrieve an error by key.

errorsAsJson

public com.fasterxml.jackson.databind.JsonNode errorsAsJson()

Returns the form errors serialized as Json.

errorsAsJson

public com.fasterxml.jackson.databind.JsonNode errorsAsJson(Lang lang)

Returns the form errors serialized as Json using the given Lang.

get

public T get()

Gets the concrete value only if the submission was a success. If the form is invalid because of validation errors this method will throw an exception. If you want to retrieve the value even when the form is invalid use value() instead.

Throws:

java.lang.IllegalStateException - if there are errors binding the form, including the errors as JSON in the message

reject

public void reject(ValidationError error)

Adds an error to this form.

Parameters:

error - the ValidationError to add.

reject

public void reject(java.lang.String key,
                   java.lang.String error,
                   java.util.List<java.lang.Object> args)

Adds an error to this form.

Parameters:

key - the error key

error - the error message

args - the error arguments

reject

public void reject(java.lang.String key,
                   java.lang.String error)

Adds an error to this form.

Parameters:

key - the error key

error - the error message

reject

public void reject(java.lang.String error,
                   java.util.List<java.lang.Object> args)

Adds a global error to this form.

Parameters:

error - the error message

args - the errot arguments

reject

public void reject(java.lang.String error)

Add a global error to this form.

Parameters:

error - the error message.

discardErrors

public void discardErrors()

Discard errors of this form

apply

public Form.Field apply(java.lang.String key)

Retrieve a field.

Parameters:

key - field name

Returns:

the field (even if the field does not exist you get a field)

field

public Form.Field field(java.lang.String key)

Retrieve a field.

Parameters:

key - field name

Returns:

the field (even if the field does not exist you get a field)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object