Form (Play 2.7.0-M1)

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.

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.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.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.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

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`java.util.List<ValidationError>`	`allErrors()` Deprecated. Deprecated as of 2.7.0. Method has been renamed to `errors()`.
`Form.Field`	`apply(java.lang.String key)` Retrieves 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()`
`Form<T>`	`discardingErrors()`
`java.util.Optional<ValidationError>`	`error(java.lang.String key)`
`java.util.List<ValidationError>`	`errors()` Returns all errors.
`java.util.List<ValidationError>`	`errors(java.lang.String key)`
`com.fasterxml.jackson.databind.JsonNode`	`errorsAsJson()`
`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)` Retrieves a field.
`Form<T>`	`fill(T value)` Populates this form with an existing value, used for edit forms.
`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()`
`java.util.Optional<ValidationError>`	`getError(java.lang.String key)` Deprecated. Deprecated as of 2.7.0. Method has been renamed to `error(String)`.
`java.util.Optional<ValidationError>`	`getGlobalError()` Deprecated. Deprecated as of 2.7.0. Method has been renamed to `globalError()`.
`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
`java.util.Optional<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()`
`boolean`	`hasGlobalErrors()`
`java.lang.String`	`name()`
`java.util.Map<java.lang.String,java.lang.String>`	`rawData()`
`protected java.util.Map<java.lang.String,java.lang.String>`	`requestData(Http.Request request)`
`java.lang.String`	`toString()`
`java.util.Optional<T>`	`value()`
`Form<T>`	`withError(java.lang.String key, java.lang.String error)`
`Form<T>`	`withError(java.lang.String key, java.lang.String error, java.util.List<java.lang.Object> args)`
`Form<T>`	`withError(ValidationError error)`
`Form<T>`	`withGlobalError(java.lang.String error)`
`Form<T>`	`withGlobalError(java.lang.String error, java.util.List<java.lang.Object> args)`

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. Consider using a FormFactory rather than this constructor.
    
    Parameters:
    
    clazz - wrapped class
    
    messagesApi - messagesApi component.
    
    formatters - formatters component.
    
    validator - validator component.
  - 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.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.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.List<ValidationError> errors,
            java.util.Optional<T> value,
            java.lang.Class<?>[] groups,
            MessagesApi messagesApi,
            Formatters formatters,
            javax.validation.Validator validator)
```
    Creates a new Form. Consider using a FormFactory rather than this constructor.
    
    Parameters:
    
    rootName - the root name.
    
    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
    
    groups - the array of classes with the groups.
    
    messagesApi - needed to look up various messages
    
    formatters - used for parsing and printing form fields
    
    validator - the validator component.
- Method Detail
  - 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.
    
    Parameters:
    
    allowedFields - the fields that should be bound to the form, all fields if not specified.
    
    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.
    
    Parameters:
    
    request - the request to bind data from.
    
    allowedFields - the fields that should be bound to the form, all fields if not specified.
    
    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.
    
    Parameters:
    
    requestData - the map of data to bind from
    
    allowedFields - the fields that should be bound to the form, all fields if not specified.
    
    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
    
    allowedFields - the fields that should be bound to the form, all fields if not specified.
    
    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
    
    Parameters:
    
    violation - the constraint violation.
    
    Returns:
    
    the message associated with the constraint violation.
  - 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
    
    allowedFields - the fields that should be bound to the form, all fields if not specified.
    
    Returns:
    
    a copy of this form filled with the new data
  - rawData
```
public java.util.Map<java.lang.String,java.lang.String> rawData()
```
    Returns:
    
    the actual form data as unmodifiable map.
  - name
```
public java.lang.String name()
```
  - value
```
public java.util.Optional<T> value()
```
    Returns:
    
    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.
  - getGlobalError
```
@Deprecated
public java.util.Optional<ValidationError> getGlobalError()
```
    Deprecated. Deprecated as of 2.7.0. Method has been renamed to globalError().
    
    Retrieves the first global error (an error without any key), if it exists.
    
    Returns:
    
    An error.
  - globalError
```
public java.util.Optional<ValidationError> globalError()
```
    Retrieves the first global error (an error without any key), if it exists.
    
    Returns:
    
    An error.
  - allErrors
```
@Deprecated
public java.util.List<ValidationError> allErrors()
```
    Deprecated. Deprecated as of 2.7.0. Method has been renamed to errors().
    
    Returns all errors.
    
    Returns:
    
    All errors associated with this form.
  - errors
```
public java.util.List<ValidationError> errors()
```
    Returns all errors.
    
    Returns:
    
    All errors associated with this form.
  - errors
```
public java.util.List<ValidationError> errors(java.lang.String key)
```
    Parameters:
    
    key - the field name associated with the error.
    
    Returns:
    
    All errors for this key.
  - getError
```
@Deprecated
public java.util.Optional<ValidationError> getError(java.lang.String key)
```
    Deprecated. Deprecated as of 2.7.0. Method has been renamed to error(String).
    
    Parameters:
    
    key - the field name associated with the error.
    
    Returns:
    
    an error by key
  - error
```
public java.util.Optional<ValidationError> error(java.lang.String key)
```
    Parameters:
    
    key - the field name associated with the error.
    
    Returns:
    
    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.
    
    Parameters:
    
    lang - the language to use.
    
    Returns:
    
    the JSON node containing the errors.
  - 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.
    
    Returns:
    
    the concrete value.
    
    Throws:
    
    java.lang.IllegalStateException - if there are errors binding the form, including the errors as JSON in the message
  - withError
```
public Form<T> withError(ValidationError error)
```
    Parameters:
    
    error - the ValidationError to add to the returned form.
    
    Returns:
    
    a copy of this form with the given error added.
  - withError
```
public Form<T> withError(java.lang.String key,
                         java.lang.String error,
                         java.util.List<java.lang.Object> args)
```
    Parameters:
    
    key - the error key
    
    error - the error message
    
    args - the error arguments
    
    Returns:
    
    a copy of this form with the given error added.
  - withError
```
public Form<T> withError(java.lang.String key,
                         java.lang.String error)
```
    Parameters:
    
    key - the error key
    
    error - the error message
    
    Returns:
    
    a copy of this form with the given error added.
  - withGlobalError
```
public Form<T> withGlobalError(java.lang.String error,
                               java.util.List<java.lang.Object> args)
```
    Parameters:
    
    error - the global error message
    
    args - the global error arguments
    
    Returns:
    
    a copy of this form with the given global error added.
  - withGlobalError
```
public Form<T> withGlobalError(java.lang.String error)
```
    Parameters:
    
    error - the global error message
    
    Returns:
    
    a copy of this form with the given global error added.
  - discardingErrors
```
public Form<T> discardingErrors()
```
    Returns:
    
    a copy of this form but with the errors discarded.
  - apply
```
public Form.Field apply(java.lang.String key)
```
    Retrieves 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)
```
    Retrieves 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

Class Form<T>

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Form

Form

Form

Form

Form

Form

Form

Method Detail

getBackedType

blankInstance

requestData

bindFromRequest

bindFromRequest

bindFromRequest

bind

getArgumentsForConstraint

getMessageForConstraintViolation

bind

rawData

name

value

fill

hasErrors

hasGlobalErrors

globalErrors

getGlobalError

globalError

allErrors

errors

errors

getError

error

errorsAsJson

errorsAsJson

get

withError

withError

withError

withGlobalError

withGlobalError

discardingErrors

apply

field

toString