Package org.apache.sis.metadata.sql

Class MetadataFallback

java.lang.Object

org.apache.sis.metadata.sql.MetadataSource

org.apache.sis.metadata.sql.MetadataFallback

All Implemented Interfaces:

AutoCloseable

final class MetadataFallback
extends MetadataSource

A fallback providing hard-coded values of metadata entities. Used when connection to the spatial metadata cannot be established.

Since:

1.0

Version:

1.2

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final MetadataFallback	INSTANCE	The unique instance of this fallback.

Fields inherited from class org.apache.sis.metadata.sql.MetadataSource

catalog, ID_COLUMN, NAME_POLICY, standard

Constructor Summary

Constructors

Modifier	Constructor	Description
private	MetadataFallback()	Creates the singleton.

Method Summary

Modifier and Type	Method	Description
void	close()	Ignored.
(package private) static org.opengis.metadata.citation.Citation	createCitation(String key)	Returns the build-in citation for the given primary key, or null.
<T> T	lookup(Class<T> type, String identifier)	Returns a hard-coded metadata filled with the data referenced by the specified identifier.
String	search(Object metadata)	Searches for the given metadata in the hard-coded list.

Methods inherited from class org.apache.sis.metadata.sql.MetadataSource

asValueMap, closeExpired, connection, extractFromCollection, getCodeList, getExistingColumns, getLookupInfo, getProvided, getTableName, getWarningFilter, helper, install, proxy, readColumn, schema, search, setWarningFilter, toStorableValue, warning

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

static final MetadataFallback INSTANCE

The unique instance of this fallback.

Constructor Details

MetadataFallback

private MetadataFallback()

Creates the singleton.

Method Details

search

public String search(Object metadata)

Searches for the given metadata in the hard-coded list.

Overrides:

search in class MetadataSource

Parameters:

metadata - the metadata to search for.

Returns:

the identifier of the given metadata, or null if none.

lookup

public <T> T lookup(Class<T> type,
 String identifier)

Returns a hard-coded metadata filled with the data referenced by the specified identifier. Alternatively, this method can also return a CodeList or Enum element.

Overrides:

lookup in class MetadataSource

Type Parameters:

T - the parameterized type of the type argument.

Parameters:

type - the interface to implement, or CodeList or some Enum types.

identifier - the identifier of hard-coded values for the metadata entity to be returned.

Returns:

an implementation of the required interface, or the code list element.

createCitation

static org.opengis.metadata.citation.Citation createCitation(String key)

Returns the build-in citation for the given primary key, or null. The content in this method should be consistent with the content provided in the "Citations.sql" script (this is verified by JUnit tests).

Parameters:

key - the primary key of the desired citation.

Returns:

the requested citation, or null if unknown.

close

public void close()

Ignored.

Specified by:

close in interface AutoCloseable

Overrides:

close in class MetadataSource