IdentifiedObject
interface.- Since:
- 0.4
- See Also:
-
Method Summary
Modifier and TypeMethodDescriptionstatic String
getDisplayName
(IdentifiedObject object, Locale locale) Returns a name that can be used for display purpose.static Identifier
getIdentifier
(IdentifiedObject object, Citation authority) Returns an identifier for the given object according the given authority.static String
Returns the string representation of the first identifier, or the object name if there is no identifier.static String
getName
(IdentifiedObject object, Citation authority) Returns an object name according the given authority.getNames
(IdentifiedObject object, Citation authority) Returns every object names and aliases according the given authority.getProperties
(IdentifiedObject object, String... excludes) Returns the information provided in the specified identified object as a map of properties.static String
Returns the first name, alias or identifier which is a valid Unicode identifier.static boolean
isHeuristicMatchForName
(IdentifiedObject object, String name) Returnstrue
if either the primary name or at least one alias matches the given string according heuristic rules.static Integer
lookupEPSG
(IdentifiedObject object) Looks up an EPSG code, such as4326
, of the specified object.static String
lookupURN
(IdentifiedObject object, Citation authority) Looks up a URN, such as"urn:ogc:def:crs:EPSG:9.1:4326"
, of the specified object.static IdentifiedObjectFinder
newFinder
(String authority) Creates a finder which can be used for looking up unidentified objects.static String
toString
(Identifier identifier) Returns a string representation of the given identifier.static String
toURN
(Class<?> type, Identifier identifier) Returns the URN of the given identifier, ornull
if no valid URN can be formed.
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Method Details
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getProperties
Returns the information provided in the specified identified object as a map of properties. The returned map contains the following entries for each key not contained in theexcludes
list and for which the corresponding method returns a non-null and non-empty value.Implementation note
The current implementation does not provide "minimumValue", "maximumValue" or "rangeMeaning" entry forCoordinateSystemAxis
instances because the minimum and maximum values depend on the units of measurement.- Parameters:
object
- the identified object to view as a properties map.excludes
- the keys of properties to exclude from the map.- Returns:
- a view of the identified object properties as an immutable map.
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getNames
Returns every object names and aliases according the given authority. This method performs the same work thangetName(IdentifiedObject, Citation)
, except that it does not stop at the first match. This method is useful in the rare cases where the same authority declares more than one name, and all those names are of interest.- Parameters:
object
- the object to get the names and aliases from, ornull
.authority
- the authority for the names to return, ornull
for any authority.- Returns:
- the object's names and aliases, or an empty set if no name or alias matching the specified authority has been found.
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getName
Returns an object name according the given authority. This method checks first the primary name, then all aliases in their iteration order.- If the name or alias implements the
Identifier
interface, then this method compares the identifier authority against the specified citation using theCitations.identifierMatches(Citation, Citation)
method. If a matching is found, then this method returns the identifier code of that object. - Otherwise, if the alias implements the
GenericName
interface, then this method compares the name scope against the specified citation using theCitations.identifierMatches(Citation, String)
method. If a matching is found, then this method returns the string representation of that name.
Identifier
andGenericName
interfaces (for exampleNamedIdentifier
). In such cases, the identifier view has precedence.- Parameters:
object
- the object to get the name from, ornull
.authority
- the authority for the name to return, ornull
for any authority.- Returns:
- the object's name (either an identifier code
or a generic name),
or
null
if no name matching the specified authority has been found. - See Also:
- If the name or alias implements the
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getIdentifier
Returns an identifier for the given object according the given authority. This method checks all identifiers in their iteration order and returns the first identifier with an authority citation matching the specified authority. If the specified authority implementsIdentifierSpace
, then the authority space name is also compared to the code space of each identifier.- Parameters:
object
- the object to get the identifier from, ornull
.authority
- the authority for the identifier to return, ornull
for the first identifier regardless its authority.- Returns:
- the object's identifier, or
null
if no identifier matching the specified authority has been found. - See Also:
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getIdentifierOrName
Returns the string representation of the first identifier, or the object name if there is no identifier. This method searches for the first non-null element inobject.getIdentifiers()
. If there is none, then this method fallback onobject.getName()
. The first element found is formatted bytoString(Identifier)
.Recommended alternatives
- If the code of a specific authority is wanted (typically EPSG), then consider
using
getIdentifier(IdentifiedObject, Citation)
instead. - In many cases, the identifier is not specified. For an exhaustive scan of the EPSG database looking for a match, use one of the search methods defined below.
- Parameters:
object
- the identified object, ornull
.- Returns:
- a string representation of the first identifier or name, or
null
if none. - See Also:
- If the code of a specific authority is wanted (typically EPSG), then consider
using
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getSimpleNameOrIdentifier
Returns the first name, alias or identifier which is a valid Unicode identifier. This method considers a name or identifier as valid ifCharSequences.isUnicodeIdentifier(CharSequence)
returnstrue
. This method performs the search in the following order:object.getName()
object.getAlias()
in iteration orderobject.getIdentifiers()
in iteration order
IdentifiedObject.getIdentifiers()
. However, the returned value is not guaranteed to be unique.- Parameters:
object
- the identified object, ornull
.- Returns:
- the first name, alias or identifier which is a valid Unicode identifier, or
null
if none. - Since:
- 1.0
- See Also:
-
getDisplayName
Returns a name that can be used for display purpose. This method checks the non-blank name, alias or identifier, in that order. If the primary name seems to be the acronym of an alias, then the alias is returned. For example if the name is "WGS 84" and an alias is "World Geodetic System 1984", then that later alias is returned.The name should never be missing, but this method nevertheless fallbacks on identifiers as a safety against incomplete implementations. If an identifier implements
GenericName
(as withNamedIdentifier
), itstoInternationalString()
method will be used.- Parameters:
object
- the identified object, ornull
.locale
- the locale for the name to return, ornull
for the default.- Returns:
- a name for human reading, or
null
if none were found. - Since:
- 1.1
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lookupURN
Looks up a URN, such as"urn:ogc:def:crs:EPSG:9.1:4326"
, of the specified object. This method searches in all geodetic authority factories known to SIS for an object approximately equals to the specified object. Then there is a choice:- If a single matching object is found in the specified authority factory, then its URN is returned.
- Otherwise if the given object is a
CompoundCRS
orConcatenatedOperation
and all components have an URN, then this method returns a combined URN. - Otherwise this method returns
null
.
Note that this method checks the identifier validity. If the given object declares explicitly an identifier, then this method will instantiate an object from the authority factory using that identifier and compare it with the given object. If the comparison fails, then this method returns
null
. Consequently, this method may returnnull
even if the given object declares explicitly its identifier. If the declared identifier is wanted unconditionally, one can use the following pattern instead:String urn = toURN(object.getClass(), getIdentifier(object, authority));
CRS.forCode(String)
.- Parameters:
object
- the object (usually a coordinate reference system) whose identifier is to be found, ornull
.authority
- the authority for the identifier to return, ornull
for the first identifier regardless its authority.- Returns:
- the identifier, or
null
if none was found without ambiguity or if the given object was null. - Throws:
FactoryException
- if an error occurred during the search.- Since:
- 0.7
- See Also:
-
lookupEPSG
Looks up an EPSG code, such as4326
, of the specified object. This method searches in EPSG factories known to SIS for an object approximately equals to the specified object. If such an object is found, then its EPSG identifier is returned. Otherwise or if there is ambiguity, this method returnsnull
.Note that this method checks the identifier validity. If the given object declares explicitly an identifier, then this method will instantiate an object from the EPSG factory using that identifier and compare it with the given object. If the comparison fails, then this method returns
null
. Consequently, this method may returnnull
even if the given object declares explicitly its identifier. If the declared identifier is wanted unconditionally, one can use the following pattern instead:String code = toString(getIdentifier(object, Citations.EPSG));
CRS.forCode(String)
.- Parameters:
object
- the object (usually a coordinate reference system) whose EPSG code is to be found, ornull
.- Returns:
- the EPSG code, or
null
if none was found without ambiguity or if the given object was null. - Throws:
FactoryException
- if an error occurred during the search.- Since:
- 0.7
- See Also:
-
newFinder
public static IdentifiedObjectFinder newFinder(String authority) throws NoSuchAuthorityFactoryException, FactoryException Creates a finder which can be used for looking up unidentified objects. This method is an alternative tolookup(…)
methods when more control are desired.Example 1: be lenient regarding axis order
By default,lookup(…)
methods require that objects in the dataset have their axes in the same order than the given object. For relaxing this condition, one can use the following Java code. This example assumes that at most one object from the dataset will match the given object. If more than one object may match, then the call tofindSingleton(…)
should be replaced byfind(…)
.IdentifiedObjectFinder finder = IdentifiedObjects.newFinder(null); finder.setIgnoringAxes(true); IdentifiedObject found = finder.findSingleton(object);
Example 2: extend the search to deprecated definitions
By default,lookup(…)
methods exclude deprecated objects from the search. To search also among deprecated objects, one can use the following Java code: This example does not use thefindSingleton(…)
convenience method on the assumption that the search may find both deprecated and non-deprecated objects.IdentifiedObjectFinder finder = IdentifiedObjects.newFinder(null); finder.setSearchDomain(IdentifiedObjectFinder.Domain.ALL_DATASET); Set<IdentifiedObject> found = finder.find(object);
- Parameters:
authority
- the authority of the objects to search (typically"EPSG"
or"OGC"
), ornull
for searching among the objects created by all authorities.- Returns:
- a finder to use for looking up unidentified objects.
- Throws:
NoSuchAuthorityFactoryException
- if the given authority is not found.FactoryException
- if the finder cannot be created for another reason.- See Also:
-
isHeuristicMatchForName
Returnstrue
if either the primary name or at least one alias matches the given string according heuristic rules. If the given object is an instance ofAbstractIdentifiedObject
, then this method delegates to itsisHeuristicMatchForName(String)
method in order to leverage the additional rules implemented by sub-classes. Otherwise the fallback implementation returnstrue
if the givenname
is equal, ignoring aspects documented below, to one of the following names: The comparison ignores the following aspects:- Lower/upper cases.
- Some Latin diacritical signs (e.g.
"Réunion"
and"Reunion"
are considered equal). - All characters that are not letters or digits
(e.g.
"Mercator (1SP)"
and"Mercator_1SP"
are considered equal). - Namespaces or scopes, because this method is typically invoked with either the value of another
IdentifiedObject.getName().getCode()
or with the Well Known Text (WKT) projection or parameter name.
object
argument isnull
, then this method returnsfalse
.- Parameters:
object
- the object for which to check the name or alias, ornull
.name
- the name to compare with the object name or aliases.- Returns:
true
if the primary name or at least one alias matches the specifiedname
.- See Also:
-
toURN
Returns the URN of the given identifier, ornull
if no valid URN can be formed. This method builds a URN from the codespace, version and code of the given identifier, completed by the givenClass
argument.First, this method starts the URN with
"urn:"
followed by a namespace determined from the identifier codespace (which is usually an abbreviation of the identifier authority). The recognized namespaces are listed in the following table (note that the list of authorities that can be used in the"urn:ogc:def"
namespace is specified by the OGC Naming Authority). If this method cannot determine a namespace for the given identifier, it returnsnull
.Valid values for the authority component in URN Namespace Authority in URN Description urn:ogc:def
EPSG
EPSG dataset urn:ogc:def
OGC
Open Geospatial Consortium urn:ogc:def
OGC-WFS
OGC Web Feature Service urn:ogc:def
SI
Système International d'Unités urn:ogc:def
UCUM
Unified Code for Units of Measure urn:ogc:def
UNSD
United Nations Statistics Division urn:ogc:def
USNO
United States Naval Observatory Class
argument. That class is usually determined simply byIdentifiedObject.getClass()
. The given class shall be assignable to one of the following types, otherwise this method returnsnull
:Valid values for the type component in URN Interface Type in URN Description CoordinateSystemAxis
axis
Coordinate system axe definition CoordinateOperation
coordinateOperation
Coordinate operation definition CoordinateReferenceSystem
crs
Coordinate reference system definition CoordinateSystem
cs
Coordinate system definition Datum
datum
Datum definition Ellipsoid
ellipsoid
Ellipsoid definition PrimeMeridian
meridian
Prime meridian definition OperationMethod
method
Operation method definition ParameterDescriptor
parameter
Operation parameter definition ReferenceSystem
referenceSystem
Value reference system definition Unit
uom
Unit of measure definition The above tables may be expanded in any future SIS version.
- Parameters:
type
- a type assignable to one of the types listed in above table.identifier
- the identifier for which to format a URN, ornull
.- Returns:
- the URN for the given identifier, or
null
if the given identifier was null or cannot be formatted by this method. - Since:
- 0.7
- See Also:
-
toString
Returns a string representation of the given identifier. This method applies the following rules:- If the given identifier implements the
GenericName
interface, then this method delegates to theGenericName.toString()
method. - Otherwise if the given identifier has a code space,
then formats the identifier as "
codespace:code
". - Otherwise if the given identifier has an authority,
then formats the identifier as "
authority:code
". - Otherwise returns the identifier code.
GenericName.toString()
behavior is specified by its javadoc, whileIdentifier
has no such contract. For example, like most ISO 19115 objects in SIS, theDefaultIdentifier
implementation is formatted as a tree. This static method can be used when a "name-like" representation is needed for any implementation.- Parameters:
identifier
- the identifier, ornull
.- Returns:
- a string representation of the given identifier, or
null
. - See Also:
- If the given identifier implements the
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