Package org.nuxeo.ecm.platform.query.api

Class AbstractPageProvider<T>

java.lang.Object
org.nuxeo.ecm.platform.query.api.AbstractPageProvider<T>
All Implemented Interfaces:
Serializable, PageProvider<T>
Direct Known Subclasses:
AbstractGroupMemberPageProvider, AbstractGroupsPageProvider, AbstractUsersPageProvider, AuditPageProvider, CoreQueryAndFetchPageProvider, CoreQueryDocumentPageProvider, DirectoryEntryPageProvider, DocumentModelListPageProvider, ElasticSearchNativePageProvider, EmptyPageProvider, ESAuditPageProvider, LatestCreatedUsersOrGroupsPageProvider, MongoDBAuditPageProvider, RoutingTaskPageProvider, UserTaskPageProvider, VFolderPageProvider
public abstract class AbstractPageProvider<T> extends Object implements PageProvider<T>
Basic implementation for a PageProvider.

Provides next/prev standard logics, and helper methods for retrieval of items and first/next/prev/last buttons display as well as other display information (number of pages for instance).

Also handles selection by providing a default implementation of getCurrentSelectPage() working in conjunction with setSelectedEntries(List).

Author:
Anahide Tchertchian
See Also:

  • Field Details

    • PAGEPROVIDER_TRACK_PROPERTY_NAME

      public static final String PAGEPROVIDER_TRACK_PROPERTY_NAME
      property used to enable globally tracking : property should contains the list of pageproviders to be tracked
      Since:
      7.4
      See Also:

    • SKIPPED_SCHEMAS_FOR_SEARCHFIELD

      protected static final List<String> SKIPPED_SCHEMAS_FOR_SEARCHFIELD
      lists schemas prefixes that should be skipped when extracting "search fields" (tracking) from searchDocumentModel
      Since:
      7.4

    • name

      protected String name

    • offset

      protected long offset

    • pageSize

      protected long pageSize

    • pageSizeOptions

      protected List<Long> pageSizeOptions

    • maxPageSize

      protected long maxPageSize

    • resultsCount

      protected long resultsCount

    • currentEntryIndex

      protected int currentEntryIndex

    • currentHigherNonEmptyPageIndex

      protected int currentHigherNonEmptyPageIndex
      Integer keeping track of the higher page index giving results. Useful for enabling or disabling the nextPage action when number of results cannot be known.
      Since:
      5.5

    • sortInfos

      protected List<SortInfo> sortInfos

    • sortable

      protected boolean sortable

    • selectedEntries

      protected List<T> selectedEntries

    • currentSelectPage

      protected PageSelections<T> currentSelectPage

    • properties

      protected Map<String,Serializable> properties

    • parameters

      protected Object[] parameters

    • searchDocumentModel

      protected DocumentModel searchDocumentModel

    • quickFilters

      protected List<QuickFilter> quickFilters
      Since:
      8.4

    • highlights

      protected List<String> highlights

    • errorMessage

      protected String errorMessage

    • error

      protected Throwable error

    • definition

      protected PageProviderDefinition definition

    • pageProviderChangedListener

      protected PageProviderChangedListener pageProviderChangedListener

    • tracking

      protected Boolean tracking

  • Constructor Details

    • AbstractPageProvider

      public AbstractPageProvider()

  • Method Details

    • getCurrentPage

      public abstract List<T> getCurrentPage()
      Returns the list of current page items.

      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 pageChanged() and refresh().

      Fields errorMessage and error can also be filled to provide accurate feedback in case an error occurs during the search.

      When items are retrieved, a call to 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 getCurrentHigherNonEmptyPageIndex() and setCurrentHigherNonEmptyPageIndex(int). In this case, CoreQueryDocumentPageProvider is a good example.

      Specified by:
      getCurrentPage in interface PageProvider<T>
      Returns:
      the current page

    • pageChanged

      protected void pageChanged()
      Page change hook, to override for custom behavior

      When overriding it, call super.pageChanged() as last statement to make sure that the PageProviderChangedListener is called with the up-to-date @{code PageProvider} state.

    • firstPage

      public void firstPage()
      Description copied from interface: PageProvider
      Go to the first page
      Specified by:
      firstPage in interface PageProvider<T>

    • getCurrentPageIndex

      public long getCurrentPageIndex()
      Description copied from interface: PageProvider
      Returns the current page index as a zero-based integer.
      Specified by:
      getCurrentPageIndex in interface PageProvider<T>

    • getCurrentPageOffset

      public long getCurrentPageOffset()
      Description copied from interface: PageProvider
      Returns the offset (starting from 0) of the first element in the current page or UNKNOWN_SIZE.
      Specified by:
      getCurrentPageOffset in interface PageProvider<T>

    • setCurrentPageOffset

      public void setCurrentPageOffset(long offset)
      Description copied from interface: PageProvider
      Sets the current page offset.

      If the provider keeps information linked to the current page, they should be reset after calling this method.

      Specified by:
      setCurrentPageOffset in interface PageProvider<T>

    • getCurrentPageSize

      public long getCurrentPageSize()
      Description copied from interface: PageProvider
      Returns the number of elements in current page.
      Specified by:
      getCurrentPageSize in interface PageProvider<T>

    • getName

      public String getName()
      Description copied from interface: PageProvider
      Returns the provider identifier
      Specified by:
      getName in interface PageProvider<T>

    • getNumberOfPages

      public long getNumberOfPages()
      Description copied from interface: PageProvider
      Returns the total number of pages or 0 if number of pages is unknown.
      Specified by:
      getNumberOfPages in interface PageProvider<T>

    • setCurrentPageIndex

      public void setCurrentPageIndex(long currentPageIndex)
      Description copied from interface: PageProvider
      Sets the current page of results to the required one.
      Specified by:
      setCurrentPageIndex in interface PageProvider<T>
      Parameters:
      currentPageIndex - the page index, starting from 0

    • setCurrentPage

      public List<T> setCurrentPage(long page)
      Description copied from interface: PageProvider
      Sets the current page of results to the required one and return it.
      Specified by:
      setCurrentPage in interface PageProvider<T>
      Parameters:
      page - the page index, starting from 0

    • getPageSize

      public long getPageSize()
      Description copied from interface: PageProvider
      Returns the number of results per page. 0 means no pagination unless PageProvider.getMaxPageSize() is greater than this value, it will be taken into account instead.
      Specified by:
      getPageSize in interface PageProvider<T>

    • setPageSize

      public void setPageSize(long pageSize)
      Description copied from interface: PageProvider
      Sets the number of results per page. 0 means no pagination unless PageProvider.getMaxPageSize() is greater than this value, it will be taken into account instead.
      Specified by:
      setPageSize in interface PageProvider<T>

    • getPageSizeOptions

      public List<Long> getPageSizeOptions()
      Description copied from interface: PageProvider
      Returns a list of available page size options to display in the page size selector.

      Uses an hardcoded list of values, and adds up the page provider initial and current page sizes.

      Specified by:
      getPageSizeOptions in interface PageProvider<T>

    • setPageSizeOptions

      public void setPageSizeOptions(List<Long> options)
      Description copied from interface: PageProvider
      Sets the page size options.
      Specified by:
      setPageSizeOptions in interface PageProvider<T>

    • getSortInfos

      public List<SortInfo> getSortInfos()
      Description copied from interface: PageProvider
      Returns the complete list of sorting info for this provider
      Specified by:
      getSortInfos in interface PageProvider<T>

    • getSortInfo

      public SortInfo getSortInfo()
      Description copied from interface: PageProvider
      Returns the first sorting info for this provider

      Also kept for compatibility with existing code.

      Specified by:
      getSortInfo in interface PageProvider<T>

    • sortInfoChanged

      protected boolean sortInfoChanged(List<SortInfo> oldSortInfos, List<SortInfo> newSortInfos)

    • setQuickFilters

      public void setQuickFilters(List<QuickFilter> quickFilters)
      Specified by:
      setQuickFilters in interface PageProvider<T>

    • getQuickFilters

      public List<QuickFilter> getQuickFilters()
      Specified by:
      getQuickFilters in interface PageProvider<T>

    • getAvailableQuickFilters

      public List<QuickFilter> getAvailableQuickFilters()
      Specified by:
      getAvailableQuickFilters in interface PageProvider<T>

    • addQuickFilter

      public void addQuickFilter(QuickFilter quickFilter)
      Specified by:
      addQuickFilter in interface PageProvider<T>

    • setSortInfos

      public void setSortInfos(List<SortInfo> sortInfo)
      Description copied from interface: PageProvider
      Sets the complete list of sorting info for this provider
      Specified by:
      setSortInfos in interface PageProvider<T>

    • setSortInfo

      public void setSortInfo(SortInfo sortInfo)
      Description copied from interface: PageProvider
      Sets the first and only sorting info for this provider.

      Also kept for compatibility with existing code.

      Specified by:
      setSortInfo in interface PageProvider<T>

    • setSortInfo

      public void setSortInfo(String sortColumn, boolean sortAscending, boolean removeOtherSortInfos)
      Description copied from interface: PageProvider
      Sets the first and only sorting info for this provider if parameter removeOtherSortInfos is true. Otherwise, adds or changes the sortAscending information according to given direction.
      Specified by:
      setSortInfo in interface PageProvider<T>

    • addSortInfo

      public void addSortInfo(String sortColumn, boolean sortAscending)
      Description copied from interface: PageProvider
      Add the given sort info to the list of sorting infos.
      Specified by:
      addSortInfo in interface PageProvider<T>

    • getSortInfoIndex

      public int getSortInfoIndex(String sortColumn, boolean sortAscending)
      Description copied from interface: PageProvider
      Returns a positive 0-based integer if given sort information is found on the set sort infos, indicating the sort index, or -1 if this sort information is not found.
      Specified by:
      getSortInfoIndex in interface PageProvider<T>

    • getHighlights

      public List<String> getHighlights()
      Specified by:
      getHighlights in interface PageProvider<T>

    • setHighlights

      public void setHighlights(List<String> highlights)
      Specified by:
      setHighlights in interface PageProvider<T>

    • isNextPageAvailable

      public boolean isNextPageAvailable()
      Description copied from interface: PageProvider
      Returns a boolean expressing if there are further pages.
      Specified by:
      isNextPageAvailable in interface PageProvider<T>

    • isLastPageAvailable

      public boolean isLastPageAvailable()
      Description copied from interface: PageProvider
      Returns a boolean expressing if the last page can be displayed.
      Specified by:
      isLastPageAvailable in interface PageProvider<T>

    • isPreviousPageAvailable

      public boolean isPreviousPageAvailable()
      Description copied from interface: PageProvider
      Returns a boolean expressing if there is a previous page.
      Specified by:
      isPreviousPageAvailable in interface PageProvider<T>

    • lastPage

      public void lastPage()
      Description copied from interface: PageProvider
      Go to the last page. Does not do anything if there is only one page displayed, or if the number of results is unknown.
      Specified by:
      lastPage in interface PageProvider<T>

    • nextPage

      public void nextPage()
      Description copied from interface: PageProvider
      Go to the next page
      Specified by:
      nextPage in interface PageProvider<T>

    • previousPage

      public void previousPage()
      Description copied from interface: PageProvider
      Go to the previous page
      Specified by:
      previousPage in interface PageProvider<T>

    • refresh

      public void refresh()
      Refresh hook, to override for custom behavior

      When overriding it, call super.refresh() as last statement to make sure that the PageProviderChangedListener is called with the up-to-date @{code PageProvider} state.

      Specified by:
      refresh in interface PageProvider<T>

    • setName

      public void setName(String name)
      Description copied from interface: PageProvider
      Sets the provider identifier
      Specified by:
      setName in interface PageProvider<T>

    • getCurrentPageStatus

      public String getCurrentPageStatus()
      Description copied from interface: PageProvider
      Returns a simple formatted string for current pagination status.
      Specified by:
      getCurrentPageStatus in interface PageProvider<T>

    • isNextEntryAvailable

      public boolean isNextEntryAvailable()
      Description copied from interface: PageProvider
      Returns true if there is a next entry.

      The next entry might be in next page, except if results count is unknown.

      Specified by:
      isNextEntryAvailable in interface PageProvider<T>

    • isPreviousEntryAvailable

      public boolean isPreviousEntryAvailable()
      Description copied from interface: PageProvider
      Returns true if there is a previous entry.

      The previous entry might be in previous page.

      Specified by:
      isPreviousEntryAvailable in interface PageProvider<T>

    • nextEntry

      public void nextEntry()
      Description copied from interface: PageProvider
      Move the current entry to the next one, if applicable.

      If needed and possible, the provider will forward to next page. No special exceptions: this method is intended to be plugged directly at the UI layer. In case there's no next entry, nothing happens.

      Specified by:
      nextEntry in interface PageProvider<T>

    • previousEntry

      public void previousEntry()
      Description copied from interface: PageProvider
      Move the current entry to the previous one, if applicable.

      No exception: this method is intended to be plugged directly at the UI layer. In case there's no previous entry, nothing will happen.

      Specified by:
      previousEntry in interface PageProvider<T>

    • getCurrentEntry

      public T getCurrentEntry()
      Description copied from interface: PageProvider
      Returns the current entry.
      Specified by:
      getCurrentEntry in interface PageProvider<T>

    • setCurrentEntry

      public void setCurrentEntry(T entry)
      Description copied from interface: PageProvider
      Sets the current entry.
      Specified by:
      setCurrentEntry in interface PageProvider<T>

    • setCurrentEntryIndex

      public void setCurrentEntryIndex(long index)
      Description copied from interface: PageProvider
      Sets the current entry index.
      Specified by:
      setCurrentEntryIndex in interface PageProvider<T>

    • getResultsCount

      public long getResultsCount()
      Description copied from interface: PageProvider
      Returns the number of result elements if available or a negative value if it is unknown: UNKNOWN_SIZE if it is unknown as query was not done, and since 5.5, UNKNOWN_SIZE_AFTER_QUERY if it is still unknown after query was done.
      Specified by:
      getResultsCount in interface PageProvider<T>

    • getProperties

      public Map<String,Serializable> getProperties()
      Description copied from interface: PageProvider
      Gets properties set on the provider.

      Useful to retrieve a provider specific field attributes after instantiation. Other contextual parameters can be passed through API constructing the result provider.

      Specified by:
      getProperties in interface PageProvider<T>

    • setProperties

      public void setProperties(Map<String,Serializable> properties)
      Description copied from interface: PageProvider
      Sets properties set on the provider.

      Useful to initialize a provider specific field attributes after instantiation. Other contextual parameters can be passed through API constructing the result provider.

      Specified by:
      setProperties in interface PageProvider<T>

    • getBooleanProperty

      protected boolean getBooleanProperty(String propName, boolean defaultValue)
      Since:
      6.0

    • setResultsCount

      public void setResultsCount(long resultsCount)
      Description copied from interface: PageProvider
      Sets the results count.
      Specified by:
      setResultsCount in interface PageProvider<T>

    • setSortable

      public void setSortable(boolean sortable)
      Specified by:
      setSortable in interface PageProvider<T>

    • isSortable

      public boolean isSortable()
      Description copied from interface: PageProvider
      Returns if this provider is sortable
      Specified by:
      isSortable in interface PageProvider<T>

    • getCurrentSelectPage

      public PageSelections<T> getCurrentSelectPage()
      Description copied from interface: PageProvider
      Returns the current page of results wrapped in a PageSelection item.

      By default, no entry is selected, unless PageProvider.setSelectedEntries(List) has been called before.

      Specified by:
      getCurrentSelectPage in interface PageProvider<T>

    • setSelectedEntries

      public void setSelectedEntries(List<T> entries)
      Description copied from interface: PageProvider
      Sets the list of selected entries to take into account in PageProvider.getCurrentSelectPage().
      Specified by:
      setSelectedEntries in interface PageProvider<T>

    • getParameters

      public Object[] getParameters()
      Specified by:
      getParameters in interface PageProvider<T>

    • setParameters

      public void setParameters(Object[] parameters)
      Specified by:
      setParameters in interface PageProvider<T>

    • getSearchDocumentModel

      public DocumentModel getSearchDocumentModel()
      Specified by:
      getSearchDocumentModel in interface PageProvider<T>

    • searchDocumentModelChanged

      protected boolean searchDocumentModelChanged(DocumentModel oldDoc, DocumentModel newDoc)

    • setSearchDocumentModel

      public void setSearchDocumentModel(DocumentModel searchDocumentModel)
      Specified by:
      setSearchDocumentModel in interface PageProvider<T>

    • getErrorMessage

      public String getErrorMessage()
      Specified by:
      getErrorMessage in interface PageProvider<T>

    • getError

      public Throwable getError()
      Specified by:
      getError in interface PageProvider<T>

    • hasError

      public boolean hasError()
      Specified by:
      hasError in interface PageProvider<T>

    • getDefinition

      public PageProviderDefinition getDefinition()
      Specified by:
      getDefinition in interface PageProvider<T>

    • setDefinition

      public void setDefinition(PageProviderDefinition providerDefinition)
      Specified by:
      setDefinition in interface PageProvider<T>

    • getMaxPageSize

      public long getMaxPageSize()
      Description copied from interface: PageProvider
      Returns the max number of results per page. 0 means no pagination.

      If page size is greater than this maximum value, it will be taken into account instead.

      Specified by:
      getMaxPageSize in interface PageProvider<T>

    • setMaxPageSize

      public void setMaxPageSize(long maxPageSize)
      Description copied from interface: PageProvider
      Sets the max number of results per page. 0 means no pagination.

      If page size is greater than this maximum value, it will be taken into account instead.

      Specified by:
      setMaxPageSize in interface PageProvider<T>

    • getMinMaxPageSize

      public long getMinMaxPageSize()
      Returns the minimal value for the max page size, taking the lower value between the requested page size and the maximum accepted page size.
      Since:
      5.4.2

    • getCurrentHigherNonEmptyPageIndex

      public int getCurrentHigherNonEmptyPageIndex()
      Returns an integer keeping track of the higher page index giving results. Useful for enabling or disabling the nextPage action when number of results cannot be known.
      Since:
      5.5

    • getPageLimit

      public long getPageLimit()
      Returns the page limit. The n first page we know they exist.
      Specified by:
      getPageLimit in interface PageProvider<T>
      Since:
      5.8

    • setCurrentHigherNonEmptyPageIndex

      public void setCurrentHigherNonEmptyPageIndex(int higherFilledPageIndex)

    • getMaxNumberOfEmptyPages

      public int getMaxNumberOfEmptyPages()
      Returns the maximum number of empty pages that can be fetched empty (defaults to 1). Can be useful for displaying pages of a provider without results count.
      Since:
      5.5

    • getDefaultMaxPageSize

      protected long getDefaultMaxPageSize()

    • setPageProviderChangedListener

      public void setPageProviderChangedListener(PageProviderChangedListener listener)
      Description copied from interface: PageProvider
      Sets the PageProviderChangedListener for this PageProvider.
      Specified by:
      setPageProviderChangedListener in interface PageProvider<T>

    • notifyPageChanged

      protected void notifyPageChanged()
      Call the registered PageProviderChangedListener, if any, to notify that the page provider current page has changed.
      Since:
      5.7

    • notifyRefresh

      protected void notifyRefresh()
      Call the registered PageProviderChangedListener, if any, to notify that the page provider has refreshed.
      Since:
      5.7

    • hasChangedParameters

      public boolean hasChangedParameters(Object[] parameters)
      Description copied from interface: PageProvider
      Test if provider parameters have changed
      Specified by:
      hasChangedParameters in interface PageProvider<T>

    • getParametersChanged

      protected boolean getParametersChanged(Object[] oldParams, Object[] newParams)

    • getAggregateDefinitions

      public List<AggregateDefinition> getAggregateDefinitions()
      Specified by:
      getAggregateDefinitions in interface PageProvider<T>

    • getAggregates

      public Map<String,Aggregate<? extends Bucket>> getAggregates()
      Specified by:
      getAggregates in interface PageProvider<T>

    • hasAggregateSupport

      public boolean hasAggregateSupport()
      Specified by:
      hasAggregateSupport in interface PageProvider<T>

    • isTrackingEnabled

      protected boolean isTrackingEnabled()
      Since:
      7.4

    • fireSearchEvent

      protected void fireSearchEvent(NuxeoPrincipal principal, String query, List<T> entries, Long executionTimeMs)
      Send a search event so that PageProvider calls can be tracked by Audit or other statistic gathering process
      Since:
      7.4

    • incorporateAggregates

      protected void incorporateAggregates(Map<String,Serializable> eventProps)
      Default (dummy) implementation that should be overridden by PageProvider actually dealing with Aggregates
      Since:
      7.4

    • getResultsCountLimit

      public long getResultsCountLimit()
      Description copied from interface: PageProvider
      Limit of number of results beyond which the page provider may not be able to compute PageProvider.getResultsCount() or navigate.

      Requesting results beyond this limit may result in error. When PageProvider.getResultsCount() is negative, it means there may be more results than this limit.

      0 means there is no limit.

      Specified by:
      getResultsCountLimit in interface PageProvider<T>

    • isSkipAggregates

      public boolean isSkipAggregates()
      Specified by:
      isSkipAggregates in interface PageProvider<T>