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org.apache.cocoon.forms.formmodel
Class AggregateField

java.lang.Object
  org.apache.cocoon.forms.formmodel.AbstractWidget
      org.apache.cocoon.forms.formmodel.Field
          org.apache.cocoon.forms.formmodel.AggregateField

All Implemented Interfaces:

ValueChangedListenerEnabled, ContainerWidget, DataWidget, SelectableWidget, Widget, ValidationErrorAware, Locatable

public class AggregateField
extends Field
implements ContainerWidget

An aggregated field allows to represent one value as multiple input fields, or several values as one field. Hence this widget is a field and a container widget simultaneously.

Upon submit, it first attempts to read own value from the request, and splits over nested field widgets using a regular expression. If split fails, this will simply give a validation error. If own value was not submitted, it attempts to read values for nested field widgets, and combines theirs values using combine expression.

To validate this widget, both the validation rules of the nested widgets are checked, and those of the aggregated field themselves. The validation rules of the aggregated field can perform checks on the string as entered by the user (e.g. check its total length).

This field and nested fields can be of any supported type, as long as combine expression gives result of the correct type, and split regular expression can split string representation into parts which can be converted to the values of nested fields.

Version:

$Id: AggregateField.html 1304258 2012-03-23 10:09:27Z ilgrosso $

Field Summary

Fields inherited from class org.apache.cocoon.forms.formmodel.Field

enteredValue, required, selectionList, SUGGESTED_LABEL_ATTR, suggestionList, validationError, value, VALUE_DISPLAY_PARSE_ERROR, VALUE_DISPLAY_VALIDATION, VALUE_PARSE_ERROR, VALUE_PARSED, VALUE_UNPARSED, VALUE_VALIDATED, VALUE_VALIDATING, valueState

Fields inherited from class org.apache.cocoon.forms.formmodel.AbstractWidget

wasValid

Fields inherited from interface org.apache.cocoon.forms.formmodel.Widget

PATH_SEPARATOR

Constructor Summary

AggregateField(AggregateFieldDefinition definition)

Method Summary

void	addChild(Widget widget) Adds a child widget.
protected void	addField(Field field)
void	combineFields()
AggregateFieldDefinition	getAggregateFieldDefinition()
Widget	getChild(String id) Concrete widgets that contain actual child widgets should override to return the actual child-widget.
Iterator	getChildren()
String	getXMLElementName() The XML element name used in AbstractWidget.generateSaxFragment(ContentHandler, Locale) to produce the wrapping element for all the XML-instance-content of this Widget.
boolean	hasChild(String id) Checks if there is a child widget with the given id.
void	initialize() Called after widget's environment has been setup, to allow for any contextual initalization, such as looking up case widgets for union widgets.
void	readFromRequest(FormContext formContext) Lets this widget read its data from a request.
void	setValue(Object newValue) Sets the value of this widget.
boolean	validate() Validates this widget and returns the outcome.

Methods inherited from class org.apache.cocoon.forms.formmodel.Field

addValueChangedListener, applyWhitespaceTrim, broadcastEvent, generateItemSaxFragment, getDatatype, getDefinition, getFieldDefinition, getSuggestionLabel, getSuggestionList, getValidationError, getValue, getXMLElementAttributes, hasValueChangedListeners, isRequired, isSuggested, readFromRequest, removeValueChangedListener, setRequired, setSelectionList, setSelectionList, setSelectionList, setSuggestionLabel, setSuggestionList, setSuggestionList, setValidationError

Methods inherited from class org.apache.cocoon.forms.formmodel.AbstractWidget

addValidator, generateDisplayData, generateLabel, generateSaxFragment, getAttribute, getCombinedState, getForm, getFullName, getId, getLocation, getName, getParent, getRequestParameterName, getState, getWidget, isValid, lookupWidget, removeAttribute, removeValidator, setAttribute, setParent, setState, toString, widgetNameChanged

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cocoon.forms.formmodel.Widget

addValidator, broadcastEvent, generateLabel, generateSaxFragment, getAttribute, getCombinedState, getDefinition, getForm, getFullName, getId, getLocation, getName, getParent, getRequestParameterName, getState, getValue, getWidget, isRequired, isValid, lookupWidget, removeAttribute, removeValidator, setAttribute, setParent, setState

Constructor Detail

AggregateField

public AggregateField(AggregateFieldDefinition definition)

Method Detail

getAggregateFieldDefinition

public final AggregateFieldDefinition getAggregateFieldDefinition()

initialize

public void initialize()

Description copied from class: AbstractWidget

Called after widget's environment has been setup, to allow for any contextual initalization, such as looking up case widgets for union widgets.

Specified by:

initialize in interface Widget

Overrides:

initialize in class Field

addChild

public void addChild(Widget widget)

Description copied from interface: ContainerWidget

Adds a child widget.

Specified by:

addChild in interface ContainerWidget

addField

protected void addField(Field field)

hasChild

public boolean hasChild(String id)

Description copied from interface: ContainerWidget

Checks if there is a child widget with the given id.

Specified by:

hasChild in interface ContainerWidget

getChildren

public Iterator getChildren()

Specified by:

getChildren in interface ContainerWidget

Returns:

an iterator over the widgets this object contains

readFromRequest

public void readFromRequest(FormContext formContext)

Description copied from interface: Widget

Lets this widget read its data from a request. At this point the Widget may try to convert the request parameter to its native datatype (if it is not a string), but it should not yet generate any validation errors.

Specified by:

readFromRequest in interface Widget

Overrides:

readFromRequest in class Field

setValue

public void setValue(Object newValue)

Description copied from interface: Widget

Sets the value of this widget.

Not all widgets do have a value (notably ContainerWidgets, but this method is provided here as a convenience to ease writing and avoiding casts.

Specified by:

setValue in interface Widget

Overrides:

setValue in class Field

Parameters:

newValue - the new widget's value.

combineFields

public void combineFields()

validate

public boolean validate()

Description copied from interface: Widget

Validates this widget and returns the outcome. Possible error messages are remembered by the widget itself and will be part of the XML produced by this widget in its Widget.generateSaxFragment(ContentHandler, Locale) method.

Specified by:

validate in interface Widget

Overrides:

validate in class Field

Returns:

true to indicate all validations were ok, false otherwise

See Also:

Widget.validate()

getXMLElementName

public String getXMLElementName()

Description copied from class: AbstractWidget

The XML element name used in AbstractWidget.generateSaxFragment(ContentHandler, Locale) to produce the wrapping element for all the XML-instance-content of this Widget.

Overrides:

getXMLElementName in class Field

Returns:

"aggregatefield"

getChild

public Widget getChild(String id)

Description copied from class: AbstractWidget

Concrete widgets that contain actual child widgets should override to return the actual child-widget.

Specified by:

getChild in interface ContainerWidget

Overrides:

getChild in class AbstractWidget

Parameters:

id - of the child-widget

Returns:

null if not overriden.