Package org.geotools.coverage.io.catalog

Class CoverageSlicesCatalog

Object

CoverageSlicesCatalog

public class CoverageSlicesCatalog
extends Object

Before GT 35.x version this class relied on an underlying DataStore (H2/PostGIS/...) to persist and query slice metadata (time/elevation/other dimensions) and the corresponding imageIndex.

Current implementation delegates query planning and slice iteration to a CoverageSlicesCatalog.SliceProvider. That can compute matches on-the-fly (e.g. using a deterministic Var/T/Z -> imageIndex mapping).

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	CoverageSlicesCatalog.CoverageSlicesContext	A CoverageSlices context holds the typeName and underlying schema of a coverage, plus a SliceProvider instance to extract CoverageSlices from that schema via a provided query.
static interface	CoverageSlicesCatalog.SliceProvider	Resolver that can translate GeoTools Query objects into a stream of matching slices.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	IMAGE_INDEX_ATTR

Constructor Summary

Constructors

Constructor	Description
CoverageSlicesCatalog()

Method Summary

Modifier and Type	Method	Description
void	computeAggregateFunction(Query query, FeatureCalc function)
ReferencedEnvelope	getBounds(Query q)	Returns bounds for granules matching the provided query without loading them all.
int	getCount(Query q)	Returns the number of granules matching the provided query without loading them all.
List<CoverageSlice>	getGranules(Query q)
SimpleFeatureType	getSchema(String typeName)
String[]	getTypeNames()
Iterator<CoverageSlice>	iterateGranules(Query q)	Streams matching CoverageSlices without materializing them into a list.
void	registerContext(CoverageSlicesCatalog.CoverageSlicesContext context)

Methods inherited from class Object

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

Field Details

IMAGE_INDEX_ATTR

public static final String IMAGE_INDEX_ATTR

See Also:

• Constant Field Values

Constructor Details

CoverageSlicesCatalog

public CoverageSlicesCatalog()

Method Details

getTypeNames

public String[] getTypeNames()

iterateGranules

public Iterator<CoverageSlice> iterateGranules(Query q)
                                        throws IOException

Streams matching CoverageSlices without materializing them into a list.

This is the preferred entry point for callers that want to avoid eagerly loading all slices.

Throws:

IOException

getCount

public int getCount(Query q)
             throws IOException

Returns the number of granules matching the provided query without loading them all. Falls back to iteration if the underlying store cannot compute counts.

Throws:

IOException

getBounds

public ReferencedEnvelope getBounds(Query q)
                             throws IOException

Returns bounds for granules matching the provided query without loading them all. Falls back to feature-collection bounds if the underlying store can't compute it directly.

Throws:

IOException

getSchema

public SimpleFeatureType getSchema(String typeName)
                            throws IOException

Throws:

IOException

computeAggregateFunction

public void computeAggregateFunction(Query query,
 FeatureCalc function)
                              throws IOException

Throws:

IOException

getGranules

public List<CoverageSlice> getGranules(Query q)
                                throws IOException

Throws:

IOException

registerContext

public void registerContext(CoverageSlicesCatalog.CoverageSlicesContext context)