org.geotools.coverage.io.impl

Class DefaultCoverageAccess

Object

DefaultCoverageAccess

All Implemented Interfaces:

CoverageAccess

Direct Known Subclasses:

DefaultFileCoverageAccess

public class DefaultCoverageAccess
extends Object
implements CoverageAccess

Default implementation of CoverageAccess.

Author:

Simone Giannecchini, GeoSolutions SAS

Nested Class Summary

Nested classes/interfaces inherited from interface CoverageAccess

CoverageAccess.AccessType

Field Summary

Fields

Modifier and Type	Field and Description
protected Map<String,Parameter<?>>	accessParameters
protected EnumSet<CoverageAccess.AccessType>	allowedAccessTypes
protected Map<String,Serializable>	connectionParameters
protected Driver	driver Driver used to create this CoverageAccess.
protected List<Name>	names

Constructor Summary

Constructors

Constructor and Description
DefaultCoverageAccess(Driver driver, EnumSet<CoverageAccess.AccessType> allowedAccessTypes, Map<String,Parameter<?>> accessParams, Map<String,Serializable> connectionParameters)

Method Summary

Modifier and Type	Method and Description
CoverageSource	access(Name name, Map<String,Serializable> params, CoverageAccess.AccessType accessType, Hints hints, ProgressListener listener) Retrieve a CoverageSource to access a Named Coverage.
boolean	canCreate(Name name, Map<String,Serializable> params, Hints hints, ProgressListener listener) Test to see if this coverage access is suitable for creating a CoverageStore referred by Name, with the specified set of parameters.
boolean	canDelete(Name name, Map<String,Serializable> params, Hints hints) Test to see if this coverage access is suitable for deleting a CoverageSource referred by Name, with the specified set of parameters.
CoverageStore	create(Name name, Map<String,Serializable> params, Hints hints, ProgressListener listener) Create a CoverageStore with the specified name.
boolean	delete(Name name, Map<String,Serializable> params, Hints hints) Asks this CoverageAccess to entirely remove a certain Coverage from the available CoverageSources.
void	dispose() This will free any cached info object or header information.
Map<String,Parameter<?>>	getAccessParameterInfo(CoverageAccess.AccessType accessType) Describes the required (and optional) parameters that can be used to open a CoverageSource.
Map<String,Serializable>	getConnectParameters() Retrieves the parameters used to connect to this live instance of CoverageAccess.
int	getCoveragesNumber(ProgressListener listener) The number of Coverages made available.
Driver	getDriver() Returns the Driver which has been used to connect to this CoverageAccess.
ServiceInfo	getInfo(ProgressListener listener) Description of the CoverageAccess we are connected to here.
List<Name>	getNames(ProgressListener listener) Names of the available Coverages.
MetadataNode	getStorageMetadata(String metadataDomain)
Set<String>	getStorageMetadataDomains()
Set<CoverageAccess.AccessType>	getSupportedAccessTypes() Retrieves the Set of supported CoverageAccess.AccessTypes for this CoverageAccess instance.
boolean	isCreateSupported() Tells me whether or not this CoverageAccess supports creation of a new coverage storage.
boolean	isDeleteSupported() Tells me whether or not this CoverageAccess supports removal of an existing coverage storage.

Methods inherited from class Object

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

Field Detail

driver

protected final Driver driver

Driver used to create this CoverageAccess.

allowedAccessTypes

protected final EnumSet<CoverageAccess.AccessType> allowedAccessTypes

accessParameters

protected final Map<String,Parameter<?>> accessParameters

connectionParameters

protected final Map<String,Serializable> connectionParameters

names

protected List<Name> names

Constructor Detail

DefaultCoverageAccess

public DefaultCoverageAccess(Driver driver,
                             EnumSet<CoverageAccess.AccessType> allowedAccessTypes,
                             Map<String,Parameter<?>> accessParams,
                             Map<String,Serializable> connectionParameters)

Method Detail

access

public CoverageSource access(Name name,
                             Map<String,Serializable> params,
                             CoverageAccess.AccessType accessType,
                             Hints hints,
                             ProgressListener listener)
                      throws IOException

Description copied from interface: CoverageAccess

Retrieve a CoverageSource to access a Named Coverage.

Specified by:

access in interface CoverageAccess

Parameters:

name - Indicate the coverage to access

params - Additional parameters as needed to indicate what part of the data set to access

accessType - Requested level of access

hints - Implementation specific hints; please review the javadocs for your Driver for details

listener - used to report progress while obtianing access

Throws:

IOException

canCreate

public boolean canCreate(Name name,
                         Map<String,Serializable> params,
                         Hints hints,
                         ProgressListener listener)
                  throws IOException

Description copied from interface: CoverageAccess

Test to see if this coverage access is suitable for creating a CoverageStore referred by Name, with the specified set of parameters.

This method will only return true if getSupportedAccessTypes() == READ_WRITE.

Specified by:

canCreate in interface CoverageAccess

Parameters:

name - The name of the data set to create

params - Indicate the content to be created

hints - Implementations specific Hints, please check the javadocs for your driver for details

Returns:

true if a coverage can be created

Throws:

IOException

canDelete

public boolean canDelete(Name name,
                         Map<String,Serializable> params,
                         Hints hints)
                  throws IOException

Description copied from interface: CoverageAccess

Test to see if this coverage access is suitable for deleting a CoverageSource referred by Name, with the specified set of parameters.

Specified by:

canDelete in interface CoverageAccess

Parameters:

name - Name of data set to remove from

params - Used to indicate what what of the data set to remove; if null indicate the entire data set should be removed

hints - Implementation specific Hints; please consult the javadocs for the Driver you are working with.

Throws:

IOException

create

public CoverageStore create(Name name,
                            Map<String,Serializable> params,
                            Hints hints,
                            ProgressListener listener)
                     throws IOException

Description copied from interface: CoverageAccess

Create a CoverageStore with the specified name.

You can check isCreateSupported() prior to calling this method. Implementing subclasses may throw an UnsupportedOperationException in case the related Driver won't allow CoverageStore creation.

Specified by:

create in interface CoverageAccess

Parameters:

name - The name of the data set to create

params - Indicate the content to be created

hints - Implementations specific Hints, please check the javadocs for your driver for details

Throws:

IOException

delete

public boolean delete(Name name,
                      Map<String,Serializable> params,
                      Hints hints)
               throws IOException

Description copied from interface: CoverageAccess

Asks this CoverageAccess to entirely remove a certain Coverage from the available CoverageSources.

Many file based formats won't allow to perform such operation, but db based source should be quite happy with it.

Specified by:

delete in interface CoverageAccess

Returns:

true in case of success.

Throws:

IOException

getAccessParameterInfo

public Map<String,Parameter<?>> getAccessParameterInfo(CoverageAccess.AccessType accessType)

Description copied from interface: CoverageAccess

Describes the required (and optional) parameters that can be used to open a CoverageSource.

Specified by:

getAccessParameterInfo in interface CoverageAccess

Returns:

Param a Map describing the Map for #connect(Map).

getConnectParameters

public Map<String,Serializable> getConnectParameters()

Description copied from interface: CoverageAccess

Retrieves the parameters used to connect to this live instance of CoverageAccess.

Specified by:

getConnectParameters in interface CoverageAccess

Returns:

the parameters used to connect to this live instance of CoverageAccess.

getCoveragesNumber

public int getCoveragesNumber(ProgressListener listener)

Description copied from interface: CoverageAccess

The number of Coverages made available.

Specified by:

getCoveragesNumber in interface CoverageAccess

Returns:

getNames( listener ).size()

getInfo

public ServiceInfo getInfo(ProgressListener listener)

Description copied from interface: CoverageAccess

Description of the CoverageAccess we are connected to here.

Specified by:

getInfo in interface CoverageAccess

Returns:

Description of the CoverageAccess we are connected to here.

getNames

public List<Name> getNames(ProgressListener listener)

Description copied from interface: CoverageAccess

Names of the available Coverages.

Each Coverage named here represents a unique data product that may be accessed via the CoverageSource

Specified by:

getNames in interface CoverageAccess

Returns:

Names of the available contents.

getStorageMetadata

public MetadataNode getStorageMetadata(String metadataDomain)

Specified by:

getStorageMetadata in interface CoverageAccess

getStorageMetadataDomains

public Set<String> getStorageMetadataDomains()

Specified by:

getStorageMetadataDomains in interface CoverageAccess

getSupportedAccessTypes

public Set<CoverageAccess.AccessType> getSupportedAccessTypes()

Description copied from interface: CoverageAccess

Retrieves the Set of supported CoverageAccess.AccessTypes for this CoverageAccess instance.

Specified by:

getSupportedAccessTypes in interface CoverageAccess

Returns:

the Set of supported CoverageAccess.AccessTypes for this CoverageAccess instance.

isCreateSupported

public boolean isCreateSupported()

Description copied from interface: CoverageAccess

Tells me whether or not this CoverageAccess supports creation of a new coverage storage.

This method will only return true if getSupportedAccessTypes() == READ_WRITE.

Specified by:

isCreateSupported in interface CoverageAccess

Returns:

true when removal of of a new coverage storage is supported, false otherwise.

isDeleteSupported

public boolean isDeleteSupported()

Description copied from interface: CoverageAccess

Tells me whether or not this CoverageAccess supports removal of an existing coverage storage.

Specified by:

isDeleteSupported in interface CoverageAccess

Returns:

true when removal of an existing coverage storage is supported, false otherwise.

getDriver

public Driver getDriver()

Description copied from interface: CoverageAccess

Returns the Driver which has been used to connect to this CoverageAccess.

Specified by:

getDriver in interface CoverageAccess

Returns:

Driver used to connect

dispose

public void dispose()

Description copied from interface: CoverageAccess

This will free any cached info object or header information.

Often a CoverageAccess will keep a file channel open, this will clean that sort of thing up.

Once a CoverageAccess has been disposed it can be seen as being in unspecified state, hence calling a method on it may have unpredictable results.

Specified by:

dispose in interface CoverageAccess