Package org.apache.sis.referencing.datum

Class DefaultImageDatum

java.lang.Object

org.apache.sis.io.wkt.FormattableObject

org.apache.sis.referencing.AbstractIdentifiedObject

org.apache.sis.referencing.datum.AbstractDatum

org.apache.sis.referencing.datum.DefaultImageDatum

All Implemented Interfaces:

Serializable, Formattable, Deprecable, LenientComparable, org.opengis.referencing.datum.Datum, org.opengis.referencing.datum.ImageDatum, org.opengis.referencing.IdentifiedObject

public class DefaultImageDatum
extends AbstractDatum
implements org.opengis.referencing.datum.ImageDatum

Defines the origin of an image coordinate reference system. An image datum is used in a local context only. For an image datum, the anchor point is usually either the centre of the image or the corner of the image.

Immutability and thread safety

This class is immutable and thus thread-safe if the property values (not necessarily the map itself) given to the constructor are also immutable. Unless otherwise noted in the javadoc, this condition holds if all components were created using only SIS factories and static constants.

Since:

0.4

Version:

0.7

See Also:

• DefaultImageCRS
• GeodeticAuthorityFactory.createImageDatum(String)
• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.sis.referencing.datum.AbstractDatum

AbstractDatum.Simplifier

Field Summary

Fields

Modifier and Type	Field	Description
private org.opengis.referencing.datum.PixelInCell	pixelInCell	Specification of the way the image grid is associated with the image data attributes.
private static final long	serialVersionUID	Serial number for inter-operability with different versions.

Fields inherited from class org.apache.sis.referencing.AbstractIdentifiedObject

DEPRECATED_KEY, LOCALE_KEY

Fields inherited from interface org.opengis.referencing.datum.Datum

ANCHOR_POINT_KEY, DOMAIN_OF_VALIDITY_KEY, REALIZATION_EPOCH_KEY, SCOPE_KEY

Fields inherited from interface org.opengis.referencing.IdentifiedObject

ALIAS_KEY, IDENTIFIERS_KEY, NAME_KEY, REMARKS_KEY

Constructor Summary

Constructors

Modifier	Constructor	Description
private	DefaultImageDatum()	Constructs a new datum in which every attributes are set to a null value.
	DefaultImageDatum(Map<String,?> properties, org.opengis.referencing.datum.PixelInCell pixelInCell)	Creates an image datum from the given properties.
protected	DefaultImageDatum(org.opengis.referencing.datum.ImageDatum datum)	Creates a new datum with the same values than the specified one.

Method Summary

Modifier and Type	Method	Description
static DefaultImageDatum	castOrCopy(org.opengis.referencing.datum.ImageDatum object)	Returns a SIS datum implementation with the same values than the given arbitrary implementation.
protected long	computeHashCode()	Invoked by hashCode() for computing the hash code when first needed.
boolean	equals(Object object, ComparisonMode mode)	Compares this datum with the specified object for equality.
protected String	formatTo(Formatter formatter)	Formats this datum as a Well Known Text ImageDatum[…] element.
Class<? extends org.opengis.referencing.datum.ImageDatum>	getInterface()	Returns the GeoAPI interface implemented by this class.
org.opengis.referencing.datum.PixelInCell	getPixelInCell()	Specification of the way the image grid is associated with the image data attributes.
private void	setPixelInCell(org.opengis.referencing.datum.PixelInCell value)	Invoked by JAXB only at unmarshalling time.

Methods inherited from class org.apache.sis.referencing.datum.AbstractDatum

castOrCopy, getAnchorPoint, getDomainOfValidity, getRealizationEpoch, getScope, isHeuristicMatchForName

Methods inherited from class org.apache.sis.referencing.AbstractIdentifiedObject

castOrCopy, equals, formatTo, getAlias, getDescription, getIdentifiers, getName, getRemarks, hashCode, isDeprecated

Methods inherited from class org.apache.sis.io.wkt.FormattableObject

print, toString, toString, toWKT

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.opengis.referencing.datum.Datum

getAnchorPoint, getDomainOfValidity, getRealizationEpoch, getScope

Methods inherited from interface org.opengis.referencing.IdentifiedObject

getAlias, getIdentifiers, getName, getRemarks, toWKT

Field Details

serialVersionUID

private static final long serialVersionUID

Serial number for inter-operability with different versions.

See Also:

• Constant Field Values

pixelInCell

private org.opengis.referencing.datum.PixelInCell pixelInCell

Specification of the way the image grid is associated with the image data attributes.

Consider this field as final! This field is modified only at unmarshalling time by setPixelInCell(PixelInCell)

See Also:

• getPixelInCell()

Constructor Details

DefaultImageDatum

public DefaultImageDatum(Map<String,?> properties,
 org.opengis.referencing.datum.PixelInCell pixelInCell)

Creates an image datum from the given properties. The properties map is given unchanged to the super-class constructor. The following table is a reminder of main (not all) properties:

Recognized properties (non exhaustive list)

Property name	Value type	Returned by
"name"	ReferenceIdentifier or String	AbstractIdentifiedObject.getName()
"alias"	GenericName or CharSequence (optionally as array)	AbstractIdentifiedObject.getAlias()
"identifiers"	ReferenceIdentifier (optionally as array)	AbstractIdentifiedObject.getIdentifiers()
"remarks"	InternationalString or String	AbstractIdentifiedObject.getRemarks()
"anchorPoint"	InternationalString or String	AbstractDatum.getAnchorPoint()
"realizationEpoch"	Date	AbstractDatum.getRealizationEpoch()
"domainOfValidity"	Extent	AbstractDatum.getDomainOfValidity()
"scope"	InternationalString or String	AbstractDatum.getScope()

Parameters:

properties - the properties to be given to the identified object.

pixelInCell - the way the image grid is associated with the image data attributes.

See Also:

• GeodeticObjectFactory.createImageDatum(Map, PixelInCell)

DefaultImageDatum

protected DefaultImageDatum(org.opengis.referencing.datum.ImageDatum datum)

Creates a new datum with the same values than the specified one. This copy constructor provides a way to convert an arbitrary implementation into a SIS one or a user-defined one (as a subclass), usually in order to leverage some implementation-specific API.

This constructor performs a shallow copy, i.e. the properties are not cloned.

Parameters:

datum - the datum to copy.

See Also:

• castOrCopy(ImageDatum)

DefaultImageDatum

private DefaultImageDatum()

Constructs a new datum in which every attributes are set to a null value. This is not a valid object. This constructor is strictly reserved to JAXB, which will assign values to the fields using reflection.

Method Details

castOrCopy

public static DefaultImageDatum castOrCopy(org.opengis.referencing.datum.ImageDatum object)

Returns a SIS datum implementation with the same values than the given arbitrary implementation. If the given object is null, then this method returns null. Otherwise if the given object is already a SIS implementation, then the given object is returned unchanged. Otherwise a new SIS implementation is created and initialized to the attribute values of the given object.

Parameters:

object - the object to get as a SIS implementation, or null if none.

Returns:

a SIS implementation containing the values of the given object (may be the given object itself), or null if the argument was null.

getInterface

public Class<? extends org.opengis.referencing.datum.ImageDatum> getInterface()

Returns the GeoAPI interface implemented by this class. The SIS implementation returns ImageDatum.class.

Note for implementers: Subclasses usually do not need to override this method since GeoAPI does not define ImageDatum sub-interface. Overriding possibility is left mostly for implementers who wish to extend GeoAPI with their own set of interfaces.

Overrides:

getInterface in class AbstractDatum

Returns:

ImageDatum.class or a user-defined sub-interface.

getPixelInCell

public org.opengis.referencing.datum.PixelInCell getPixelInCell()

Specification of the way the image grid is associated with the image data attributes.

Specified by:

getPixelInCell in interface org.opengis.referencing.datum.ImageDatum

Returns:

the way image grid is associated with image data attributes.

equals

public boolean equals(Object object,
 ComparisonMode mode)

Compares this datum with the specified object for equality.

Specified by:

equals in interface LenientComparable

Overrides:

equals in class AbstractDatum

Parameters:

object - the object to compare to this.

mode - STRICT for performing a strict comparison, or IGNORE_METADATA for comparing only properties relevant to coordinate transformations.

Returns:

true if both objects are equal.

See Also:

• AbstractIdentifiedObject.computeHashCode()
• Utilities.deepEquals(Object, Object, ComparisonMode)

computeHashCode

protected long computeHashCode()

Invoked by hashCode() for computing the hash code when first needed. See AbstractIdentifiedObject.computeHashCode() for more information.

Overrides:

computeHashCode in class AbstractDatum

Returns:

the hash code value. This value may change in any future Apache SIS version.

formatTo

protected String formatTo(Formatter formatter)

Formats this datum as a Well Known Text ImageDatum[…] element.

Compatibility note: ImageDatum is defined in the WKT 2 specification only.

Overrides:

formatTo in class AbstractDatum

Parameters:

formatter - the formatter where to format the inner content of this WKT element.

Returns:

"ImageDatum".

See Also:

• WKT 2 specification §12.2

setPixelInCell

private void setPixelInCell(org.opengis.referencing.datum.PixelInCell value)

Invoked by JAXB only at unmarshalling time.

See Also:

• getPixelInCell()