public class EmptyPageProvider<T extends Serializable> extends AbstractPageProvider<T>
currentEntryIndex, currentHigherNonEmptyPageIndex, currentSelectPage, definition, error, errorMessage, highlights, log, maxPageSize, name, offset, PAGEPROVIDER_TRACK_PROPERTY_NAME, pageProviderChangedListener, pageSize, pageSizeOptions, parameters, properties, quickFilters, resultsCount, searchDocumentModel, selectedEntries, SKIPPED_SCHEMAS_FOR_SEARCHFIELD, sortable, sortInfos, tracking
DEFAULT_MAX_PAGE_SIZE, DEFAULT_MAX_PAGE_SIZE_RUNTIME_PROP, HIGHLIGHT_CTX_DATA, PAGE_LIMIT_UNKNOWN, UNKNOWN_SIZE, UNKNOWN_SIZE_AFTER_QUERY
Constructor and Description |
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EmptyPageProvider() |
Modifier and Type | Method and Description |
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List<T> |
getCurrentPage()
Returns the list of current page items.
|
addQuickFilter, addSortInfo, fireSearchEvent, firstPage, getAggregateDefinitions, getAggregates, getAvailableQuickFilters, getBooleanProperty, getCurrentEntry, getCurrentHigherNonEmptyPageIndex, getCurrentPageIndex, getCurrentPageOffset, getCurrentPageSize, getCurrentPageStatus, getCurrentSelectPage, getDefaultMaxPageSize, getDefinition, getError, getErrorMessage, getHighlights, getMaxNumberOfEmptyPages, getMaxPageSize, getMinMaxPageSize, getName, getNumberOfPages, getPageLimit, getPageSize, getPageSizeOptions, getParameters, getParametersChanged, getProperties, getQuickFilters, getResultsCount, getSearchDocumentModel, getSortInfo, getSortInfoIndex, getSortInfos, hasAggregateSupport, hasChangedParameters, hasError, incorporateAggregates, isLastPageAvailable, isNextEntryAvailable, isNextPageAvailable, isPreviousEntryAvailable, isPreviousPageAvailable, isSortable, isTrackingEnabled, lastPage, nextEntry, nextPage, notifyPageChanged, notifyRefresh, pageChanged, previousEntry, previousPage, refresh, searchDocumentModelChanged, setCurrentEntry, setCurrentEntryIndex, setCurrentHigherNonEmptyPageIndex, setCurrentPage, setCurrentPageIndex, setCurrentPageOffset, setDefinition, setHighlights, setMaxPageSize, setName, setPageProviderChangedListener, setPageSize, setPageSizeOptions, setParameters, setProperties, setQuickFilters, setResultsCount, setSearchDocumentModel, setSelectedEntries, setSortable, setSortInfo, setSortInfo, setSortInfos, sortInfoChanged
public EmptyPageProvider()
public List<T> getCurrentPage()
AbstractPageProvider
Custom implementation can be added here, based on the page provider properties, parameters and
WhereClauseDefinition
on the PageProviderDefinition
, as well as search document, sort
information, etc...
Implementation of this method usually consists in setting a non-null value to a field caching current items, and
nullifying this field by overriding AbstractPageProvider.pageChanged()
and AbstractPageProvider.refresh()
.
Fields AbstractPageProvider.errorMessage
and AbstractPageProvider.error
can also be filled to provide accurate feedback in case an error
occurs during the search.
When items are retrieved, a call to AbstractPageProvider.setResultsCount(long)
should be made to ensure proper pagination as
implemented in this abstract class. The implementation in CoreQueryAndFetchPageProvider
is a good example
when the total results count is known.
If for performance reasons, for instance, the number of results cannot be known, a fall-back strategy can be
applied to provide the "next" button but not the "last" one, by calling
AbstractPageProvider.getCurrentHigherNonEmptyPageIndex()
and AbstractPageProvider.setCurrentHigherNonEmptyPageIndex(int)
. In this case,
CoreQueryDocumentPageProvider
is a good example.
getCurrentPage
in interface PageProvider<T extends Serializable>
getCurrentPage
in class AbstractPageProvider<T extends Serializable>
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