Package com.luciad.format.asterix

Class ALcdASTERIXScalingFactorProvider

java.lang.Object

com.luciad.format.asterix.ALcdASTERIXScalingFactorProvider

public abstract class ALcdASTERIXScalingFactorProvider
extends Object

Provider for scaling factors for some data items of some ASTERIX categories.

Some ASTERIX categories specify their data in fixed point notation, that is an integer value together with a factor. If for example the value is 16000, the unit is degrees, and the factor is 0.005, that means an angle of 80 degrees.

Some other data items of some ASTERIX categories however, specify that factor relative to a 'scaling factor' (f-value). For example the factor to multiply the value with is specified as 2 ^ -6+f. That scaling factor is to be found elsewhere in the data, or from an external source. This scaling factor provider serves the purpose of providing the scaling factor when it cannot be retrieved from the data source. This can happen because it is not specified where to retrieve the scaling factor from, or if it is specified, but the actual data omits the value.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	CAT_1_CARTESIAN_COORDINATES	Constant indicating the scaling factor for the cartesian coordinates of category 1 data.
static final int	CAT_1_DOPPLER_SPEED	Constant indicating the scaling factor for the doppler speed of category 1 data.
static final int	CAT_30_CARTESIAN_COORDINATES	Constant indicating the scaling factor for the cartesian coordinates of category 30 data.
static final int	CAT_8_FACTOR	Constant indicating the scaling factor for category 8 data.

Constructor Summary

Constructors

Constructor	Description
ALcdASTERIXScalingFactorProvider()

Method Summary

Modifier and Type	Method	Description
abstract int	scalingFactor(ILcdModel aModel, int aID)	Provides the scaling factor (f-value) for a given constant specified in this class.

Methods inherited from class java.lang.Object

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

Field Details

CAT_1_CARTESIAN_COORDINATES

public static final int CAT_1_CARTESIAN_COORDINATES

Constant indicating the scaling factor for the cartesian coordinates of category 1 data. That is the data for the property with this name: TLcdASTERIXCategory1.I001_042_CI_CALCULATED_POSITION_CARTESIAN.

See Also:

• Constant Field Values

CAT_1_DOPPLER_SPEED

public static final int CAT_1_DOPPLER_SPEED

Constant indicating the scaling factor for the doppler speed of category 1 data. That is the data for the property with this name: TLcdASTERIXCategory1.I001_120_SI_MEASURED_RADIAL_DOPPLER_SPEED.

See Also:

• Constant Field Values

CAT_8_FACTOR

public static final int CAT_8_FACTOR

Constant indicating the scaling factor for category 8 data.

See Also:

• Constant Field Values

CAT_30_CARTESIAN_COORDINATES

public static final int CAT_30_CARTESIAN_COORDINATES

Constant indicating the scaling factor for the cartesian coordinates of category 30 data. That is the data for the property with this name: TLcdASTERIXCategory30.I030_100_CI_CALCULATED_TRACK_POSITION_CARTESIAN.

See Also:

• Constant Field Values

Constructor Details

ALcdASTERIXScalingFactorProvider

public ALcdASTERIXScalingFactorProvider()

Method Details

scalingFactor

public abstract int scalingFactor(ILcdModel aModel,
 int aID)

Provides the scaling factor (f-value) for a given constant specified in this class.

Whenever scaling factors are present in the data stream, they take precedence over values returned by this provider.

Whenever Integer.MIN_VALUE is returned, defaults will be used. This can be useful to override the default behavior for a specific constant, but to leave the defaults unchanged for other categories.

Parameters:

aModel - The model containing the data for which the scaling factors are needed. It can be used to retrieve the User Application Profile (UAP) from its ILcdModelDescriptor, to retrieve the ILcdDataModelDescriptor, ILcdFeaturedDescriptor, and so on.

aID - The id of the scaling factor: one of the constants specified in this class.

Returns:

The scaling factor, or Integer.MIN_VALUE to request to use a a default value.