Package org.wicketstuff.datatables.virtualscroll

Class AbstractVirtualScrollResourceReference<T>

java.lang.Object

org.apache.wicket.request.resource.ResourceReference

org.wicketstuff.datatables.virtualscroll.AbstractVirtualScrollResourceReference<T>

All Implemented Interfaces:

Serializable, IClusterable

public abstract class AbstractVirtualScrollResourceReference<T>
extends ResourceReference

An abstract resource reference that could be used as a base for custom implementations

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.wicket.request.resource.ResourceReference

ResourceReference.Key, ResourceReference.LambdaResourceReference, ResourceReference.UrlAttributes

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ASCENDING_DIRECTION
static final String	DATA_RESPONSE_FIELD
static final String	DESCENDING_DIRECTION
static final String	DRAW_PARAMETER
static final String	DRAW_RESPONSE_FIELD
static final String	LENGTH_PARAMETER
static final String	ORDER_0_COLUMN_PARAMETER
static final String	ORDER_0_DIRECTION_PARAMETER
static final String	RECORDS_FILTERED_RESPONSE_FIELD
static final String	RECORDS_TOTAL_RESPONSE_FIELD
static final String	SEARCH_REGEX_PARAMETER
static final String	SEARCH_VALUE_PARAMETER
static final String	START_PARAMETER

Constructor Summary

Constructors

Constructor	Description
AbstractVirtualScrollResourceReference(Class<?> scope, String name)
AbstractVirtualScrollResourceReference(Class<?> scope, String name, Locale locale, String style, String variation)
AbstractVirtualScrollResourceReference(String name)
AbstractVirtualScrollResourceReference(ResourceReference.Key key)

Method Summary

Modifier and Type	Method	Description
protected String	generateResponse(PageParameters parameters)	Generates the JSON response for infinite scrolling/paging.
protected abstract IDataProvider<T>	getDataProvider(PageParameters parameters)
protected int	getDefaultLength()	Sometimes DataTables confuses itself and send NaN as a value for the length parameter.
protected int	getDefaultStart()
IResource	getResource()
protected void	populateDataJson(com.github.openjson.JSONObject response, IDataProvider<T> dataProvider)
protected abstract void	populateEntryJson(com.github.openjson.JSONObject entryJson, T dataEntry)	A callback method that should populate the JSON object for a single entry in the response

Methods inherited from class org.apache.wicket.request.resource.ResourceReference

canBeRegistered, equals, getDependencies, getExtension, getKey, getLocale, getName, getScope, getStyle, getUrlAttributes, getVariation, hashCode, of, of, toString

Methods inherited from class java.lang.Object

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

Field Details

LENGTH_PARAMETER

public static final String LENGTH_PARAMETER

See Also:

• Constant Field Values

START_PARAMETER

public static final String START_PARAMETER

See Also:

• Constant Field Values

DRAW_PARAMETER

public static final String DRAW_PARAMETER

See Also:

• Constant Field Values

ORDER_0_COLUMN_PARAMETER

public static final String ORDER_0_COLUMN_PARAMETER

See Also:

• Constant Field Values

ORDER_0_DIRECTION_PARAMETER

public static final String ORDER_0_DIRECTION_PARAMETER

See Also:

• Constant Field Values

ASCENDING_DIRECTION

public static final String ASCENDING_DIRECTION

See Also:

• Constant Field Values

DESCENDING_DIRECTION

public static final String DESCENDING_DIRECTION

See Also:

• Constant Field Values

SEARCH_VALUE_PARAMETER

public static final String SEARCH_VALUE_PARAMETER

See Also:

• Constant Field Values

SEARCH_REGEX_PARAMETER

public static final String SEARCH_REGEX_PARAMETER

See Also:

• Constant Field Values

RECORDS_TOTAL_RESPONSE_FIELD

public static final String RECORDS_TOTAL_RESPONSE_FIELD

See Also:

• Constant Field Values

RECORDS_FILTERED_RESPONSE_FIELD

public static final String RECORDS_FILTERED_RESPONSE_FIELD

See Also:

• Constant Field Values

DRAW_RESPONSE_FIELD

public static final String DRAW_RESPONSE_FIELD

See Also:

• Constant Field Values

DATA_RESPONSE_FIELD

public static final String DATA_RESPONSE_FIELD

See Also:

• Constant Field Values

Constructor Details

AbstractVirtualScrollResourceReference

public AbstractVirtualScrollResourceReference(ResourceReference.Key key)

AbstractVirtualScrollResourceReference

public AbstractVirtualScrollResourceReference(Class<?> scope,
 String name,
 Locale locale,
 String style,
 String variation)

AbstractVirtualScrollResourceReference

public AbstractVirtualScrollResourceReference(Class<?> scope,
 String name)

AbstractVirtualScrollResourceReference

public AbstractVirtualScrollResourceReference(String name)

Method Details

getResource

public IResource getResource()

Specified by:

getResource in class ResourceReference

generateResponse

protected String generateResponse(PageParameters parameters)

Generates the JSON response for infinite scrolling/paging. See DataTables server side docs.

Parameters:

parameters - The request parameters

Returns:

populateDataJson

protected void populateDataJson(com.github.openjson.JSONObject response,
 IDataProvider<T> dataProvider)

populateEntryJson

protected abstract void populateEntryJson(com.github.openjson.JSONObject entryJson,
 T dataEntry)

A callback method that should populate the JSON object for a single entry in the response

Parameters:

entryJson - The JSON object to populate

dataEntry - The data entry returned by the data provider

getDataProvider

protected abstract IDataProvider<T> getDataProvider(PageParameters parameters)

Returns:

The provider of the data for the table

getDefaultStart

protected int getDefaultStart()

Returns:

A default value for the start request parameter for the cases when DataTables sends non-numeric value, like Nan

getDefaultLength

protected int getDefaultLength()

Sometimes DataTables confuses itself and send NaN as a value for the length parameter.

Returns:

The default value of length when DataTables cannot calculate a good value for some reason