Package org.zkoss.zul

Class SimpleListModel<E>

java.lang.Object

org.zkoss.zul.AbstractListModel<E>

org.zkoss.zul.SimpleListModel<E>

All Implemented Interfaces:

java.io.Serializable, Pageable, Selectable<E>, Sortable<E>, ListModel<E>, ListSubModel<E>, PageableModel

public class SimpleListModel<E>
extends AbstractListModel<E>
implements Sortable<E>, ListSubModel<E>, java.io.Serializable

A simple implementation of ListModel.

Note: It assumes the content is immutable. If not, use ListModelList or ListModelArray instead. In additions, it stores the data in the array format, so if the original data is not an array. It is better not to use this class.

Also notice that SimpleListModel also implements ListSubModel. It means when it is used with Combobox, only the data that matches what the user typed will be shown.

Author:

tomyeh

See Also:

ListModelArray, ListModelSet, ListModelList, ListModelMap, (since 3.0.2), Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.zkoss.zul.AbstractListModel

AbstractListModel.DefaultSelectionControl<E>

Field Summary

Fields inherited from class org.zkoss.zul.AbstractListModel

_selection

Fields inherited from interface org.zkoss.zul.PageableModel

INTERNAL_EVENT

Constructor Summary

Constructors

Constructor	Description
SimpleListModel(E[] data)	Constructor.
SimpleListModel(E[] data, boolean live)	Constructor.
SimpleListModel(java.util.List<? extends E> data)	Constructor.

Method Summary

Modifier and Type	Method	Description
java.lang.Object	clone()
protected void	fireSelectionEvent(E e)	Selectable's implementor use only.
E	getElementAt(int j)	Returns the value at the specified index.
protected int	getMaxNumberInSubModel(int nRows)	Returns the maximal allowed number of matched items in the sub-model returned by getSubModel(java.lang.Object, int).
int	getSize()	Returns the length of the list.
java.lang.String	getSortDirection(java.util.Comparator<E> cmpr)	Returns the sort direction of this model for the given comparator.
ListModel<E>	getSubModel(java.lang.Object value, int nRows)	Returns the subset of the list model data that matches the specified value.
protected boolean	inSubModel(java.lang.Object key, java.lang.Object value)	Compares if the given value shall belong to the submodel represented by the key.
void	sort()	Sort the data model by default or assigned comparator.
void	sort(java.util.Comparator<E> cmpr, boolean ascending)	Sorts the data.

Methods inherited from class org.zkoss.zul.AbstractListModel

addListDataListener, addPagingEventListener, addToSelection, clearSelection, fireEvent, getActivePage, getListDataListeners, getPageCount, getPageSize, getSelection, getSelectionControl, getTotalSize, isMultiple, isSelected, isSelectionEmpty, newEmptySelection, readSelection, removeAllSelection, removeFromSelection, removeListDataListener, removePagingEventListener, retainAllSelection, setActivePage, setMultiple, setPageSize, setSelection, setSelectionControl, writeSelection

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleListModel

public SimpleListModel(E[] data,
                       boolean live)

Constructor.

Parameters:

data - the array to represent

live - whether to have a 'live' ListModel on top of the specified list. If false, the content of the specified list is copied. If true, this object is a 'facade' of the specified list, i.e., when you add or remove items from this ListModelList, the inner "live" list would be changed accordingly. However, it is not a good idea to modify data once it is passed to this method with live is true, since Listbox is not smart enough to handle it.

Since:

2.4.1

SimpleListModel

public SimpleListModel(E[] data)

Constructor. It made a copy of the specified array (data).

Notice that if the data is static or not shared, it is better to use SimpleListModelMap(data, true) instead, since making a copy is slower.

SimpleListModel

public SimpleListModel(java.util.List<? extends E> data)

Constructor. Notice the data will be converted to an array, so the performance is not good if the data is huge. Use ListModelList instead if the data is huge.

Since:

2.4.1

Method Detail

getSize

public int getSize()

Description copied from interface: ListModel

Returns the length of the list.

Specified by:

getSize in interface ListModel<E>

getElementAt

public E getElementAt(int j)

Description copied from interface: ListModel

Returns the value at the specified index.

Specified by:

getElementAt in interface ListModel<E>

sort

public void sort(java.util.Comparator<E> cmpr,
                 boolean ascending)

Sorts the data.

Specified by:

sort in interface Sortable<E>

Parameters:

cmpr - the comparator.

ascending - whether to sort in the ascending order. It is ignored since this implementation uses cmpr to compare.

sort

public void sort()

Description copied from interface: Sortable

Sort the data model by default or assigned comparator. Notice that the default implementation does nothing, the model which implements Sortable need to implement this method.

Specified by:

sort in interface Sortable<E>

See Also:

Sortable.sort(Comparator, boolean)

getSortDirection

public java.lang.String getSortDirection(java.util.Comparator<E> cmpr)

Description copied from interface: Sortable

Returns the sort direction of this model for the given comparator. It must be one of "ascending", "descending" and "natural".

Default: "natural".

Specified by:

getSortDirection in interface Sortable<E>

getSubModel

public ListModel<E> getSubModel(java.lang.Object value,
                                int nRows)

Returns the subset of the list model data that matches the specified value. It is usually used for implementation of auto-complete.

The implementation uses inSubModel(java.lang.Object, java.lang.Object) to check if the returned object of getElementAt(int) shall be in the sub model.

Notice the maximal allowed number of items is decided by getMaxNumberInSubModel(int), which, by default, returns 15 if nRows is negative.

Specified by:

getSubModel in interface ListSubModel<E>

Parameters:

value - the value to retrieve the subset of the list model. It is the key argument when invoking inSubModel(java.lang.Object, java.lang.Object). this string.

nRows - the maximal allowed number of matched items. If negative, it means the caller allows any number, but the implementation usually limits to a certain number (for better performance).

Since:

3.0.2

See Also:

inSubModel(java.lang.Object, java.lang.Object), getMaxNumberInSubModel(int)

getMaxNumberInSubModel

protected int getMaxNumberInSubModel(int nRows)

Returns the maximal allowed number of matched items in the sub-model returned by getSubModel(java.lang.Object, int).

Default: nRows < 0 ? 15: nRows.

Since:

5.0.4

inSubModel

protected boolean inSubModel(java.lang.Object key,
                             java.lang.Object value)

Compares if the given value shall belong to the submodel represented by the key.

Default: converts both key and value to String objects and then return true if the String object of value starts with the String object

Parameters:

key - the key representing the submodel. In autocomplete, it is the value entered by user.

value - the value in this model.

Since:

5.0.4

See Also:

getSubModel(java.lang.Object, int)

clone

public java.lang.Object clone()

Overrides:

clone in class AbstractListModel<E>

fireSelectionEvent

protected void fireSelectionEvent(E e)

Description copied from class: AbstractListModel

Selectable's implementor use only.

Fires a selection event for component to scroll into view. The override subclass must put the index0 of AbstractListModel.fireEvent(int, int, int) as the view index to scroll. By default, the value -1 is assumed which means no scroll into view.

The method is invoked when both methods are invoked. AbstractListModel.addToSelection(Object) and AbstractListModel.setSelection(Collection).

Overrides:

fireSelectionEvent in class AbstractListModel<E>

Parameters:

e - selected object.