Package org.vaadin.miki.superfields.object.util

Class MetadataBasedGroupingProvider

java.lang.Object

org.vaadin.miki.superfields.object.util.MetadataBasedGroupingProvider

All Implemented Interfaces:

Serializable, PropertyGroupingProvider

public class MetadataBasedGroupingProvider
extends Object
implements PropertyGroupingProvider

A grouping provider based on a String metadata property. Can optionally also sort, based on another Integer metadata property. Grouping metadata must be of type ACCEPTED_GROUPING_METADATA_TYPE. When the group name is not specified, a single-element group with the property is created, with the name of that property as the name of the group. Sorting metadata must be of type that belongs to ACCEPTED_SORTING_METADATA_TYPES. Sorting is done by value of the metadata first, then by name of the property.

Since:

2022-09-02

Author:

miki

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static Class<String>	ACCEPTED_GROUPING_METADATA_TYPE
static Set<Class<?>>	ACCEPTED_SORTING_METADATA_TYPES

Constructor Summary

Constructors

Constructor	Description
MetadataBasedGroupingProvider()

Method Summary

Modifier and Type	Method	Description
String	getGroupingMetadataName()	Returns name of the metadata property used to obtain group names.
String	getSortingMetadataName()	Returns the current name of the metadata property used for sorting.
<T> Map<String,List<Property<T,?>>>	groupDefinitions(List<Property<T,?>> definitions)	Groups given definitions.
void	setGroupingMetadataName(String groupingMetadataName)	Sets the name of the metadata property used to obtain group names.
void	setSortingMetadataName(String sortingMetadataName)	Sets the name of the metadata property used for sorting the properties.
MetadataBasedGroupingProvider	withGroupingMetadataName(String metadataName)	Chains setGroupingMetadataName(String) and returns itself.
MetadataBasedGroupingProvider	withSortingMetadataName(String metadataName)	Chains setSortingMetadataName(String) and returns itself.

Methods inherited from class java.lang.Object

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

Field Detail

ACCEPTED_SORTING_METADATA_TYPES

public static final Set<Class<?>> ACCEPTED_SORTING_METADATA_TYPES

ACCEPTED_GROUPING_METADATA_TYPE

public static final Class<String> ACCEPTED_GROUPING_METADATA_TYPE

Constructor Detail

MetadataBasedGroupingProvider

public MetadataBasedGroupingProvider()

Method Detail

groupDefinitions

public <T> Map<String,List<Property<T,?>>> groupDefinitions(List<Property<T,?>> definitions)

Description copied from interface: PropertyGroupingProvider

Groups given definitions.

Specified by:

groupDefinitions in interface PropertyGroupingProvider

Type Parameters:

T - Type parameter for Propertys.

Parameters:

definitions - Definitions to group.

Returns:

A non-null (but possibly empty) map. The map will not contain new Propertys, those from the parameter will be reused.

getGroupingMetadataName

public String getGroupingMetadataName()

Returns name of the metadata property used to obtain group names.

Returns:

Name of the metadata property. May be null when no metadata property was specified.

setGroupingMetadataName

public void setGroupingMetadataName(String groupingMetadataName)

Sets the name of the metadata property used to obtain group names. May be set to null do disable grouping. In such case each Property will be in its own, single element group, regardless of the metadata.

Parameters:

groupingMetadataName - Name of the metadata. Its type must be ACCEPTED_GROUPING_METADATA_TYPE.

withGroupingMetadataName

public final MetadataBasedGroupingProvider withGroupingMetadataName(String metadataName)

Chains setGroupingMetadataName(String) and returns itself.

Parameters:

metadataName - Name of the metadata.

Returns:

This.

See Also:

setGroupingMetadataName(String)

getSortingMetadataName

public String getSortingMetadataName()

Returns the current name of the metadata property used for sorting.

Returns:

Metadata name. May be null.

setSortingMetadataName

public void setSortingMetadataName(String sortingMetadataName)

Sets the name of the metadata property used for sorting the properties. May be set to null to disable sorting.

Parameters:

sortingMetadataName - Name of the metadata. Its type must belong to ACCEPTED_SORTING_METADATA_TYPES.

withSortingMetadataName

public final MetadataBasedGroupingProvider withSortingMetadataName(String metadataName)

Chains setSortingMetadataName(String) and returns itself.

Parameters:

metadataName - Metadata name.

Returns:

This.

See Also:

setSortingMetadataName(String)