adql.query.operand.function.geometry

Class IntersectsFunction

java.lang.Object

adql.query.operand.function.ADQLFunction

adql.query.operand.function.geometry.GeometryFunction

adql.query.operand.function.geometry.IntersectsFunction

All Implemented Interfaces:

ADQLObject, ADQLOperand

public class IntersectsFunction
extends GeometryFunction

It represents the INTERSECTS function of the ADQL language.

This numeric function determines if two geometry values overlap. This is most commonly used to express a "shape-vs-shape" intersection test.

Example:
INTERSECTS(CIRCLE('ICRS GEOCENTER', 25.4, -20.0, 1), BOX('ICRS GEOCENTER', 20.0, -15.0, 10, 10)) = 1
In this example the function determines whether the circle of one degree radius centered in a position (25.4, -20.0) degrees and defined according to the ICRS coordinate system with GEOCENTER reference position overlaps with a box of ten degrees centered in a position (20.0, -15.0) in degrees and defined according to the same coordinate system.

Warning:

• The INTERSECTS function returns 1 (true) if the two arguments overlap and 0 (false) otherwise.
• Since the two argument geometries may be expressed in different coordinate systems, the function is responsible for converting one (or both). If it can not do so, it SHOULD throw an error message, to be defined by the service making use of ADQL.

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

coordSys

Constructor Summary

Constructors

Constructor and Description
IntersectsFunction(GeometryFunction.GeometryValue<GeometryFunction> param1, GeometryFunction.GeometryValue<GeometryFunction> param2) Builds an INTERSECTS function.
IntersectsFunction(IntersectsFunction toCopy) Builds an INTERSECTS function by copying the given one.

Method Summary

Modifier and Type	Method and Description
ADQLObject	getCopy() Gets a (deep) copy of this ADQL object.
GeometryFunction.GeometryValue<GeometryFunction>	getLeftParam()
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.
GeometryFunction.GeometryValue<GeometryFunction>	getRightParam()
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.
void	setLeftParam(GeometryFunction.GeometryValue<GeometryFunction> leftParam)
ADQLOperand	setParameter(int index, ADQLOperand replacer) Replaces the index-th parameter by the given one.
void	setRightParam(GeometryFunction.GeometryValue<GeometryFunction> rightParam)

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

Constructor Detail

IntersectsFunction

public IntersectsFunction(GeometryFunction.GeometryValue<GeometryFunction> param1,
                          GeometryFunction.GeometryValue<GeometryFunction> param2)
                   throws java.lang.NullPointerException

Builds an INTERSECTS function.

Parameters:

param1 - The first geometry.

param2 - The second geometry.

Throws:

java.lang.NullPointerException - If there is an error with at least one of the parameters.

IntersectsFunction

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

Builds an INTERSECTS function by copying the given one.

Parameters:

toCopy - The INTERSECTS function to copy.

Throws:

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

Method Detail

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.

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.

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.

getLeftParam

public final GeometryFunction.GeometryValue<GeometryFunction> getLeftParam()

Returns:

The leftParam.

setLeftParam

public final void setLeftParam(GeometryFunction.GeometryValue<GeometryFunction> leftParam)

Parameters:

leftParam - The leftParam to set.

getRightParam

public final GeometryFunction.GeometryValue<GeometryFunction> getRightParam()

Returns:

The rightParam.

setRightParam

public final void setRightParam(GeometryFunction.GeometryValue<GeometryFunction> rightParam)

Parameters:

rightParam - The rightParam to set.

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.