com.vaadin.ui
Class Grid.AbstractRenderer<T>

java.lang.Object
  com.vaadin.server.AbstractClientConnector
      com.vaadin.server.AbstractExtension
          com.vaadin.ui.Grid.AbstractGridExtension
              com.vaadin.ui.Grid.AbstractRenderer<T>

Type Parameters:

T - the type this renderer knows how to present

All Implemented Interfaces:

MethodEventSource, ClientConnector, Extension, com.vaadin.shared.Connector, Renderer<T>, java.io.Serializable

Direct Known Subclasses:

AbstractJavaScriptRenderer, ClickableRenderer, DateRenderer, HtmlRenderer, NumberRenderer, ProgressBarRenderer, TextRenderer

Enclosing class:

Grid

public abstract static class Grid.AbstractRenderer<T>
extends Grid.AbstractGridExtension
implements Renderer<T>

An abstract base class for server-side Grid renderers. This class currently extends the AbstractExtension superclass, but this fact should be regarded as an implementation detail and subject to change in a future major or minor Vaadin revision.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.vaadin.server.ClientConnector

ClientConnector.AttachEvent, ClientConnector.AttachListener, ClientConnector.ConnectorErrorEvent, ClientConnector.DetachEvent, ClientConnector.DetachListener

Constructor Summary

protected	Grid.AbstractRenderer(java.lang.Class<T> presentationType)
protected	Grid.AbstractRenderer(java.lang.Class<T> presentationType, java.lang.String nullRepresentation)

Method Summary

elemental.json.JsonValue	encode(T value) Encodes the given value into a JsonValue.
protected <U> elemental.json.JsonValue	encode(U value, java.lang.Class<U> type) Encodes the given value to JSON.
protected void	extend(AbstractClientConnector target) Deprecated.
protected java.lang.String	getNullRepresentation() Null representation for the renderer
java.lang.Class<T>	getPresentationType() Returns the class literal corresponding to the presentation type T.
protected java.lang.Class<Grid>	getSupportedParentType() Deprecated.

Methods inherited from class com.vaadin.ui.Grid.AbstractGridExtension

getColumn, getItemId, getParentGrid

Methods inherited from class com.vaadin.server.AbstractExtension

getParent, remove, setParent

Methods inherited from class com.vaadin.server.AbstractClientConnector

addAttachListener, addDetachListener, addExtension, addListener, addListener, addListener, addMethodInvocationToQueue, attach, beforeClientResponse, createState, detach, encodeState, equals, fireEvent, getAllChildrenIterable, getConnectorId, getErrorHandler, getExtensions, getListeners, getResource, getRpcManager, getRpcProxy, getSession, getState, getState, getStateType, getUI, handleConnectorRequest, hashCode, hasListeners, isAttached, isConnectorEnabled, isThis, markAsDirty, markAsDirtyRecursive, registerRpc, registerRpc, removeAttachListener, removeDetachListener, removeExtension, removeListener, removeListener, removeListener, removeListener, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setErrorHandler, setResource

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.vaadin.ui.renderers.Renderer

remove, setParent

Methods inherited from interface com.vaadin.server.ClientConnector

addAttachListener, addDetachListener, attach, beforeClientResponse, detach, encodeState, getErrorHandler, getExtensions, getParent, getRpcManager, getStateType, getUI, handleConnectorRequest, isAttached, isConnectorEnabled, markAsDirty, markAsDirtyRecursive, removeAttachListener, removeDetachListener, removeExtension, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setErrorHandler

Methods inherited from interface com.vaadin.shared.Connector

getConnectorId

Constructor Detail

Grid.AbstractRenderer

protected Grid.AbstractRenderer(java.lang.Class<T> presentationType,
                                java.lang.String nullRepresentation)

Grid.AbstractRenderer

protected Grid.AbstractRenderer(java.lang.Class<T> presentationType)

Method Detail

getSupportedParentType

@Deprecated
protected java.lang.Class<Grid> getSupportedParentType()

Deprecated.

This method is inherited from AbstractExtension but should never be called directly with an AbstractRenderer.

Overrides:

getSupportedParentType in class AbstractExtension

Returns:

a type that the parent must be an instance of

extend

@Deprecated
protected void extend(AbstractClientConnector target)

Deprecated.

This method is inherited from AbstractExtension but should never be called directly with an AbstractRenderer.

Overrides:

extend in class AbstractExtension

Parameters:

target - the connector to attach this extension to

getPresentationType

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

Description copied from interface: Renderer

Returns the class literal corresponding to the presentation type T.

Specified by:

getPresentationType in interface Renderer<T>

Returns:

the class literal of T

encode

public elemental.json.JsonValue encode(T value)

Description copied from interface: Renderer

Encodes the given value into a JsonValue.

Specified by:

encode in interface Renderer<T>

Parameters:

value - the value to encode

Returns:

a JSON representation of the given value

getNullRepresentation

protected java.lang.String getNullRepresentation()

Null representation for the renderer

Returns:

a textual representation of null

encode

protected <U> elemental.json.JsonValue encode(U value,
                                              java.lang.Class<U> type)

Encodes the given value to JSON.

This is a helper method that can be invoked by an encode(T) override if serializing a value of type other than the presentation type is desired. For instance, a Renderer<Date> could first turn a date value into a formatted string and return encode(dateString, String.class).

Parameters:

value - the value to be encoded

type - the type of the value

Returns:

a JSON representation of the given value