adql.query.operand.function.geometry

Class ExtractCoord

java.lang.Object

adql.query.operand.function.ADQLFunction

adql.query.operand.function.geometry.GeometryFunction

adql.query.operand.function.geometry.ExtractCoord

All Implemented Interfaces:

ADQLObject, ADQLOperand

public class ExtractCoord
extends GeometryFunction

It represents the COORD1 and the COORD2 functions of the ADQL language.

This function extracts the first or the second coordinate value (in degrees) of a given POINT or column reference.

Example:
COORD1(POINT('ICRS GEOCENTER', 25.0, -19.5))
In this example the function extracts the right ascension of a point with position (25, -19.5) in degrees according to the ICRS coordinate system with GEOCENTER reference position.

Version:

1.4 (06/2015)

Author:

Grégory Mantelet (CDS;ARI)

Nested Class Summary

Nested classes/interfaces inherited from class adql.query.operand.function.geometry.GeometryFunction

GeometryFunction.GeometryValue<F extends GeometryFunction>

Nested classes/interfaces inherited from class adql.query.operand.function.ADQLFunction

ADQLFunction.ParameterIterator

Field Summary

Fields

Modifier and Type	Field and Description
protected int	indCoord Number of the coordinate to extract (1 or 2).
protected GeometryFunction.GeometryValue<PointFunction>	point The point from which the coordinate must be extracted.

Fields inherited from class adql.query.operand.function.geometry.GeometryFunction

coordSys

Constructor Summary

Constructors

Constructor and Description
ExtractCoord(ExtractCoord toCopy) Builds a COORD1 or a COORD2 function by copying the given one.
ExtractCoord(int indiceCoord, GeometryFunction.GeometryValue<PointFunction> p) Builds a COORD1 or a COORD2 function with the given point (a POINT function or a column which contains a POINT function).

Method Summary

Modifier and Type	Method and Description
ADQLObject	getCopy() Gets a (deep) copy of this ADQL object.
java.lang.String	getName() Gets the name of this object in ADQL.
int	getNbParameters() Gets the number of parameters this function has.
ADQLOperand	getParameter(int index) Gets the index-th parameter.
ADQLOperand[]	getParameters() Gets the list of all parameters of this function.
boolean	isGeometry() Tell whether this operand is a geometrical region or not.
boolean	isNumeric() Tell whether this operand is numeric or not.
boolean	isString() Tell whether this operand is a string or not.
ADQLOperand	setParameter(int index, ADQLOperand replacer) Replaces the index-th parameter by the given one.

Methods inherited from class adql.query.operand.function.geometry.GeometryFunction

getCoordinateSystem, setCoordinateSystem

Methods inherited from class adql.query.operand.function.ADQLFunction

adqlIterator, getPosition, paramIterator, setPosition, toADQL

Methods inherited from class java.lang.Object

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

Field Detail

indCoord

protected final int indCoord

Number of the coordinate to extract (1 or 2).

point

protected GeometryFunction.GeometryValue<PointFunction> point

The point from which the coordinate must be extracted.

Constructor Detail

ExtractCoord

public ExtractCoord(int indiceCoord,
                    GeometryFunction.GeometryValue<PointFunction> p)
             throws java.lang.ArrayIndexOutOfBoundsException,
                    java.lang.NullPointerException

Builds a COORD1 or a COORD2 function with the given point (a POINT function or a column which contains a POINT function).

Parameters:

indiceCoord - 1 or 2: the index of the coordinate to extract.

p - The POINT function from which the indiceCoord-th coordinate must be extracted.

Throws:

java.lang.ArrayIndexOutOfBoundsException - If the given index is different from 1 and 2.

java.lang.NullPointerException - If the given geometry is null.

ExtractCoord

public ExtractCoord(ExtractCoord toCopy)
             throws java.lang.Exception

Builds a COORD1 or a COORD2 function by copying the given one.

Parameters:

toCopy - The COORD1 or the COORD2 to copy.

Throws:

java.lang.Exception - If there is an error during the copy.

Method Detail

getName

public java.lang.String getName()

Description copied from interface: ADQLObject

Gets the name of this object in ADQL.

Returns:

The name of this ADQL object.

getCopy

public ADQLObject getCopy()
                   throws java.lang.Exception

Description copied from interface: ADQLObject

Gets a (deep) copy of this ADQL object.

Returns:

The copy of this ADQL object.

Throws:

java.lang.Exception - If there is any error during the copy.

isNumeric

public boolean isNumeric()

Description copied from interface: ADQLOperand

Tell whether this operand is numeric or not.

Returns:

true if this operand is numeric, false otherwise.

isString

public boolean isString()

Description copied from interface: ADQLOperand

Tell whether this operand is a string or not.

Returns:

true if this operand is a string, false otherwise.

isGeometry

public boolean isGeometry()

Description copied from interface: ADQLOperand

Tell whether this operand is a geometrical region or not.

Returns:

true if this operand is a geometry, false otherwise.

getParameters

public ADQLOperand[] getParameters()

Description copied from class: ADQLFunction

Gets the list of all parameters of this function.

Specified by:

getParameters in class ADQLFunction

Returns:

Its parameters list.

getNbParameters

public int getNbParameters()

Description copied from class: ADQLFunction

Gets the number of parameters this function has.

Specified by:

getNbParameters in class ADQLFunction

Returns:

Number of parameters.

getParameter

public ADQLOperand getParameter(int index)
                         throws java.lang.ArrayIndexOutOfBoundsException

Description copied from class: ADQLFunction

Gets the index-th parameter.

Specified by:

getParameter in class ADQLFunction

Parameters:

index - Parameter number.

Returns:

The corresponding parameter.

Throws:

java.lang.ArrayIndexOutOfBoundsException - If the index is incorrect (index < 0 || index >= getNbParameters()).

setParameter

public ADQLOperand setParameter(int index,
                                ADQLOperand replacer)
                         throws java.lang.ArrayIndexOutOfBoundsException,
                                java.lang.NullPointerException,
                                java.lang.Exception

Description copied from class: ADQLFunction

Replaces the index-th parameter by the given one.

Specified by:

setParameter in class ADQLFunction

Parameters:

index - Index of the parameter to replace.

replacer - The replacer.

Returns:

The replaced parameter.

Throws:

java.lang.ArrayIndexOutOfBoundsException - If the index is incorrect (index < 0 || index >= getNbParameters()).

java.lang.NullPointerException - If a required parameter must be replaced by a NULL object.

java.lang.Exception - If another error occurs.