com.threerings.gwt.util

Class SimpleDataModel<T>

java.lang.Object

com.threerings.gwt.util.SimpleDataModel<T>

All Implemented Interfaces:

DataModel<T>

public class SimpleDataModel<T>
extends Object
implements DataModel<T>

A data model that is implements DataModel with a List of items.

Constructor Summary

Constructors

Constructor and Description
SimpleDataModel(List<T> items) Construct a new SimpleDataModel instance with the given items.

Method Summary

Methods

Modifier and Type	Method and Description
void	addItem(int index, T item) Adds an item to this model.
void	doFetchRows(int start, int count, AsyncCallback<List<T>> callback) Perform a paged data request for the given number of items at the given offset into the result set.
SimpleDataModel<T>	filter(Predicate<T> pred) Returns a data model that contains only items that match the supplied predicate.
T	findItem(Predicate<T> p) Returns the first item that matches the supplied predicate or null if no items in this model matches the predicate.
int	getItemCount() Returns the total number of items in this model.
static <T> SimpleDataModel<T>	newModel(List<T> items) Creates a new simple data model with the supplied list of items.
void	removeItem(T item) Called when we wish to remove an item from our locally cached data.
void	updateItem(T item) Updates the specified item if found in the model, prepends it otherwise.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SimpleDataModel

public SimpleDataModel(List<T> items)

Construct a new SimpleDataModel instance with the given items.

Method Detail

newModel

public static <T> SimpleDataModel<T> newModel(List<T> items)

Creates a new simple data model with the supplied list of items.

filter

public SimpleDataModel<T> filter(Predicate<T> pred)

Returns a data model that contains only items that match the supplied predicate.

addItem

public void addItem(int index,
           T item)

Adds an item to this model. Does not force the refresh of any display.

updateItem

public void updateItem(T item)

Updates the specified item if found in the model, prepends it otherwise.

findItem

public T findItem(Predicate<T> p)

Returns the first item that matches the supplied predicate or null if no items in this model matches the predicate.

getItemCount

public int getItemCount()

Description copied from interface: DataModel

Returns the total number of items in this model. It is OK if this returns zero until after the first call to DataModel.doFetchRows(int, int, com.google.gwt.user.client.rpc.AsyncCallback<java.util.List<T>>) is called back. You may also return -1 to indicate that this model does not supply a row count, and the pager should continue offering pages for as long as the underlying service is able to satisfy the requests.

Specified by:

getItemCount in interface DataModel<T>

doFetchRows

public void doFetchRows(int start,
               int count,
               AsyncCallback<List<T>> callback)

Description copied from interface: DataModel

Perform a paged data request for the given number of items at the given offset into the result set. The result is returned through the given callback.

Specified by:

doFetchRows in interface DataModel<T>

removeItem

public void removeItem(T item)

Description copied from interface: DataModel

Called when we wish to remove an item from our locally cached data.

Specified by:

removeItem in interface DataModel<T>