ome.services

Class ThumbnailCtx

java.lang.Object

ome.services.ThumbnailCtx

public class ThumbnailCtx
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ThumbnailCtx.NoThumbnail Marker exception which is thrown by all methods which wish to tell their callers that for whatever reason the desired Thumbnail is not available, in which case the caller can use a *Direct method instead.

Field Summary

Fields

Modifier and Type	Field and Description
static String	DEFAULT_MIME_TYPE Default thumbnail MIME type.

Constructor Summary

Constructors

Constructor and Description
ThumbnailCtx(IQuery queryService, IUpdate updateService, IPixels pixelsService, IRenderingSettings settingsService, ThumbnailService thumbnailService, OmeroContext applicationContext, SecuritySystem securitySystem, long userId) Default constructor.

Method Summary

Modifier and Type	Method and Description
Dimension	calculateXYWidths(Pixels pixels, int longestSide) Calculates the ratio of the two sides of a Pixel set and returns the X and Y widths based on the longest side maintaining aspect ratio.
void	createAndPrepareMissingRenderingSettings(Set<Long> pixelsIds) Resets a given set of Pixels rendering settings to the default effectively creating any which do not exist.
Thumbnail	createThumbnailMetadata(Pixels pixels, Dimension dimensions) Creates metadata for a thumbnail of a given set of pixels set and X-Y dimensions.
boolean	dirtyMetadata(long pixelsId) Whether or not the thumbnail metadata for a given Pixels ID is dirty (the RenderingDef has been updated since the Thumbnail was).
Thumbnail	getMetadata(long pixelsId) Retrieves the Thumbnail object for a given Pixels ID.
Pixels	getPixels(long pixelsId) Retrieves the Pixels object for a given Pixels ID.
RenderingDef	getSettings(long pixelsId) Retrieves the RenderingDef object for a given Pixels ID.
long	getUserId() Retrieves the current user ID to use for queries.
boolean	hasMetadata(long pixelsId) Whether or not thumbnail metadata is available for a given Pixels ID.
boolean	hasSettings(long pixelsId) Whether or not settings are available for a given Pixels ID.
boolean	isExtendedGraphCritical(Set<Long> pixelsIds) Whether or not we're extended graph critical for a given set of dimension pools.
boolean	isThumbnailCached(long pixelsId) Checks to see if a thumbnail is in the on disk cache or not.
List<Thumbnail>	loadAllMetadata(long pixelsId) Retrieves all thumbnail metadata available in the database for a given Pixels ID.
void	loadAndPrepareMetadata(Set<Long> pixelsIds, Dimension dimensions) Bulk loads and prepares metadata for a group of pixels sets.
void	loadAndPrepareMetadata(Set<Long> pixelsIds, Dimension dimensions, boolean createMissing) Bulk loads and prepares metadata for a group of pixels sets.
void	loadAndPrepareMetadata(Set<Long> pixelsIds, int longestSide) Bulk loads and prepares metadata for a group of pixels sets.
void	loadAndPrepareRenderingSettings(long pixelsId, long settingsId) Loads and prepares a rendering settings for a Pixels ID and RenderingDef ID.
void	loadAndPrepareRenderingSettings(Set<Long> pixelsIds) Bulk loads a set of rendering settings for a group of pixels sets and prepares our internal data structures.
void	setUserId(long userId) Sets the user ID to use for queries.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_MIME_TYPE

public static final String DEFAULT_MIME_TYPE

Default thumbnail MIME type.

See Also:

Constant Field Values

Constructor Detail

ThumbnailCtx

public ThumbnailCtx(IQuery queryService,
                    IUpdate updateService,
                    IPixels pixelsService,
                    IRenderingSettings settingsService,
                    ThumbnailService thumbnailService,
                    OmeroContext applicationContext,
                    SecuritySystem securitySystem,
                    long userId)

Default constructor.

Parameters:

queryService - OMERO query service to use.

updateService - OMERO update service to use.

pixelsService - OMERO pixels service to use.

settingsService - OMERO rendering settings service to use.

thumbnailService - OMERO thumbnail service to use.

applicationContext - OMERO application context

securitySystem - OMERO security system for this session.

userId - Current user ID.

Method Detail

getUserId

public long getUserId()

Retrieves the current user ID to use for queries.

Returns:

See above.

setUserId

public void setUserId(long userId)

Sets the user ID to use for queries.

Parameters:

userId - The user ID to use for queries.

loadAndPrepareRenderingSettings

public void loadAndPrepareRenderingSettings(Set<Long> pixelsIds)

Bulk loads a set of rendering settings for a group of pixels sets and prepares our internal data structures.

Parameters:

pixelsIds - Set of Pixels IDs to prepare rendering settings for.

loadAndPrepareRenderingSettings

public void loadAndPrepareRenderingSettings(long pixelsId,
                                            long settingsId)

Loads and prepares a rendering settings for a Pixels ID and RenderingDef ID.

Parameters:

pixelsId - Pixels ID to load.

settingsId - RenderingDef ID to load an prepare settings for.

loadAndPrepareMetadata

public void loadAndPrepareMetadata(Set<Long> pixelsIds,
                                   int longestSide)

Bulk loads and prepares metadata for a group of pixels sets. Calling this method guarantees that metadata are available, creating them if they are not.

Parameters:

pixelsIds - Pixels IDs to prepare metadata for.

longestSide - The longest side of the thumbnails requested.

loadAndPrepareMetadata

public void loadAndPrepareMetadata(Set<Long> pixelsIds,
                                   Dimension dimensions)

Bulk loads and prepares metadata for a group of pixels sets. Calling this method guarantees that metadata are available, creating them if they are not.

Parameters:

pixelsIds - Pixels IDs to prepare metadata for.

dimensions - X-Y dimensions of the thumbnails requested.

loadAndPrepareMetadata

public void loadAndPrepareMetadata(Set<Long> pixelsIds,
                                   Dimension dimensions,
                                   boolean createMissing)

Bulk loads and prepares metadata for a group of pixels sets. Calling this method guarantees that metadata are available, creating them if they are not.

Parameters:

pixelsIds - Pixels IDs to prepare metadata for.

dimensions - X-Y dimensions of the thumbnails requested.

loadAllMetadata

public List<Thumbnail> loadAllMetadata(long pixelsId)

Retrieves all thumbnail metadata available in the database for a given Pixels ID.

Parameters:

pixelsId - Pixels ID to retrieve thumbnail metadata for.

Returns:

See above.

createAndPrepareMissingRenderingSettings

public void createAndPrepareMissingRenderingSettings(Set<Long> pixelsIds)

Resets a given set of Pixels rendering settings to the default effectively creating any which do not exist.

Parameters:

pixelsIds - Pixels IDs

hasSettings

public boolean hasSettings(long pixelsId)

Whether or not settings are available for a given Pixels ID.

Parameters:

pixelsId - Pixels ID to check for availability.

Returns:

true if settings are available and false otherwise.

hasMetadata

public boolean hasMetadata(long pixelsId)

Whether or not thumbnail metadata is available for a given Pixels ID.

Parameters:

pixelsId - Pixels ID to check for availability.

Returns:

true if metadata is available and false otherwise.

getPixels

public Pixels getPixels(long pixelsId)

Retrieves the Pixels object for a given Pixels ID.

Parameters:

pixelsId - Pixels ID to retrieve the Pixels object for.

Returns:

See above.

getSettings

public RenderingDef getSettings(long pixelsId)

Retrieves the RenderingDef object for a given Pixels ID.

Parameters:

pixelsId - Pixels ID to retrieve the RenderingDef object for.

Returns:

See above.

getMetadata

public Thumbnail getMetadata(long pixelsId)
                      throws ThumbnailCtx.NoThumbnail

Retrieves the Thumbnail object for a given Pixels ID.

Parameters:

pixelsId - Pixels ID to retrieve the Thumbnail object for.

Returns:

See above.

Throws:

ThumbnailCtx.NoThumbnail

dirtyMetadata

public boolean dirtyMetadata(long pixelsId)

Whether or not the thumbnail metadata for a given Pixels ID is dirty (the RenderingDef has been updated since the Thumbnail was).

Parameters:

pixelsId - Pixels ID to check for dirty metadata.

Returns:

true if the metadata is dirty false otherwise.

isThumbnailCached

public boolean isThumbnailCached(long pixelsId)

Checks to see if a thumbnail is in the on disk cache or not.

Parameters:

pixelsId - The Pixels set the thumbnail is for.

Returns:

Whether or not the thumbnail is in the on disk cache.

calculateXYWidths

public Dimension calculateXYWidths(Pixels pixels,
                                   int longestSide)

Calculates the ratio of the two sides of a Pixel set and returns the X and Y widths based on the longest side maintaining aspect ratio.

Parameters:

pixels - The Pixels set to calculate against.

longestSide - The size of the longest side of the thumbnail requested.

Returns:

The calculated width (X) and height (Y).

isExtendedGraphCritical

public boolean isExtendedGraphCritical(Set<Long> pixelsIds)

Whether or not we're extended graph critical for a given set of dimension pools. We're extended graph critical if:

• isGraphCritical() == true and the Pixels set does not belong to us.
• isGraphCritical() == false, the Pixels set does not belong to us and the group is READ-ONLY.

Parameters:

pixelsIds - Set of Pixels to check if we're graph critical for.

Returns:

true if we're graph critical, and false otherwise.

createThumbnailMetadata

public Thumbnail createThumbnailMetadata(Pixels pixels,
                                         Dimension dimensions)

Creates metadata for a thumbnail of a given set of pixels set and X-Y dimensions.

Parameters:

pixels - The Pixels set to create thumbnail metadata for.

dimensions - The dimensions of the thumbnail.

Returns:

the thumbnail metadata as created.

See Also:

getMetadata(long)