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org.apache.cocoon.forms.formmodel
Class Output

java.lang.Object
  org.apache.cocoon.forms.formmodel.AbstractWidget
      org.apache.cocoon.forms.formmodel.Output

All Implemented Interfaces:

ValueChangedListenerEnabled, DataWidget, Widget, Locatable

public class Output
extends AbstractWidget
implements DataWidget, ValueChangedListenerEnabled

An Output widget can be used to show a non-editable value to the user. An Output widget is associated with a certain Datatype.

An Output widget is always valid and never required.

Version:

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

Field Summary

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

Output(OutputDefinition definition)

Method Summary

void	addValueChangedListener(ValueChangedListener listener)
void	broadcastEvent(WidgetEvent event) Broadcast an event previously queued by this widget to its event listeners.
protected void	generateItemSaxFragment(ContentHandler contentHandler, Locale locale) Generates nested additional content nested inside the main element for this widget which is generated by AbstractWidget.generateSaxFragment(ContentHandler, Locale) The implementation on the AbstractWidget level inserts no additional XML.
Datatype	getDatatype()
WidgetDefinition	getDefinition() Concrete subclasses should allow access to their underlaying Definition through this method.
OutputDefinition	getOutputDefinition()
Object	getValue() Get the value of a widget.
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	hasValueChangedListeners()
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.
boolean	isValid() Return the current validation state.
void	readFromRequest(FormContext formContext) Lets this widget read its data from a request.
void	removeValueChangedListener(ValueChangedListener listener)
void	setValue(Object object) Sets the value of this widget.
boolean	validate() Validates this widget and returns the outcome.

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

addValidator, generateDisplayData, generateLabel, generateSaxFragment, getAttribute, getChild, getCombinedState, getForm, getFullName, getId, getLocation, getName, getParent, getRequestParameterName, getState, getWidget, getXMLElementAttributes, isRequired, 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, generateLabel, generateSaxFragment, getAttribute, getCombinedState, getForm, getFullName, getId, getLocation, getName, getParent, getRequestParameterName, getState, getWidget, isRequired, lookupWidget, removeAttribute, removeValidator, setAttribute, setParent, setState

Constructor Detail

Output

public Output(OutputDefinition definition)

Method Detail

getDatatype

public Datatype getDatatype()

Specified by:

getDatatype in interface DataWidget

getDefinition

public WidgetDefinition getDefinition()

Description copied from class: AbstractWidget

Concrete subclasses should allow access to their underlaying Definition through this method. If subclasses decide to return null they should also organize own implementations of AbstractWidget.getId(), AbstractWidget.getLocation(), AbstractWidget.validate(), AbstractWidget.generateLabel(ContentHandler) and AbstractWidget.generateDisplayData(ContentHandler) to avoid NPE's.

Specified by:

getDefinition in interface Widget

Specified by:

getDefinition in class AbstractWidget

Returns:

the widgetDefinition from which this widget was instantiated. (See WidgetDefinition.createInstance())

getOutputDefinition

public OutputDefinition getOutputDefinition()

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 AbstractWidget

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

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 AbstractWidget

Returns:

true to indicate all validations were ok, false otherwise

See Also:

Widget.validate()

isValid

public boolean isValid()

Description copied from interface: Widget

Return the current validation state. This method delivers the same result as the last call to Widget.validate(). The validation process is not started again. If the value of this widget has changed since the latest call to Widget.validate(), the result of this method is out of date.

Specified by:

isValid in interface Widget

Overrides:

isValid in class AbstractWidget

Returns:

The result of the last call to Widget.validate().

See Also:

Widget.isValid()

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.

Specified by:

getXMLElementName in class AbstractWidget

Returns:

"output"

generateItemSaxFragment

protected void generateItemSaxFragment(ContentHandler contentHandler,
                                       Locale locale)
                                throws SAXException

Description copied from class: AbstractWidget

Generates nested additional content nested inside the main element for this widget which is generated by AbstractWidget.generateSaxFragment(ContentHandler, Locale) The implementation on the AbstractWidget level inserts no additional XML. Subclasses need to override to insert widget specific content.

Overrides:

generateItemSaxFragment in class AbstractWidget

Parameters:

contentHandler - to send the SAX events to

locale - in which context potential content needs to be put.

Throws:

SAXException

getValue

public Object getValue()

Description copied from interface: Widget

Get the value of a 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:

getValue in interface Widget

Overrides:

getValue in class AbstractWidget

Returns:

the value of the widget.

setValue

public void setValue(Object object)

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 AbstractWidget

Parameters:

object - the new widget's value.

addValueChangedListener

public void addValueChangedListener(ValueChangedListener listener)

Specified by:

addValueChangedListener in interface ValueChangedListenerEnabled

removeValueChangedListener

public void removeValueChangedListener(ValueChangedListener listener)

Specified by:

removeValueChangedListener in interface ValueChangedListenerEnabled

hasValueChangedListeners

public boolean hasValueChangedListeners()

Specified by:

hasValueChangedListeners in interface ValueChangedListenerEnabled

broadcastEvent

public void broadcastEvent(WidgetEvent event)

Description copied from class: AbstractWidget

Broadcast an event previously queued by this widget to its event listeners. Abstract implementation throws a UnsupportedOperationException. Concrete subclass widgets need to override when supporting event broadcasting.

Specified by:

broadcastEvent in interface Widget

Overrides:

broadcastEvent in class AbstractWidget