com.luciad.format.aixm.decoder

Aviation StandardsClass TLcdAIXMVORHandler

java.lang.Object

com.luciad.format.aixm.decoder.TLcdAIXMVORHandler

All Implemented Interfaces:

ILcdAIXMHandler

public class TLcdAIXMVORHandler
extends Object

This implementation of ILcdAIXMHandler deals with VOR elements. Decoded models have as model descriptor an instance of TLcdAIXMVORModelDescriptor.

The objects in decoded models are based on the AIS domain objects available in com.luciad.ais.model, which all implement ILcdDataObject. This interface provides a generic and format-independent way of accessing the type and properties (features) of a domain object.

For this handler, the type of the decoded objects is TLcdAIXMDataTypes.VOR, which can also be retrieved through ILcdDataObject.getDataType(). The available properties of the objects are defined in TLcdAIXMVORDataProperties. The values for these properties can be retrieved through ILcdDataObject.getValue(com.luciad.datamodel.TLcdDataProperty).

Next to ILcdDataObject, the objects in decoded models also implement ILcdFeatured, the former interface to access the properties (features) of a domain object. This is still fully supported, and explained in the following comments.

The setVORFeatureNamesToBeDecoded method allows the user to specify which AIXM features are decoded into the featured model objects.

If no feature names to be decoded are specified, all features will be decoded.

The following fields (taken from the AIXM specification) are supported by the decoder. The list indicates into which feature or attribute the fields are decoded. It also indicates from which AIXM version on they are available.

• Version 3.3 :
  • Identifier: ILcdAIXMVORFeature.IDENTIFIER
  • Name: ILcdAIXMVORFeature.NAME
  • NAVAID Class: ILcdAIXMVORFeature.NAVAID_CLASS
  • Type: ILcdAIXMVORFeature.TYPE
  • Beginning date: ILcdAIXMVORFeature.DATE_FROM
  • End date: ILcdAIXMVORFeature.DATE_TILL
  • Artificial unique identifier: ILcdAIXMVORFeature.MID
  • Frequency: ILcdAIXMVORFeature.FREQUENCY, ILcdAIXMVORFeature.FREQUENCY_UNIT
  • Emission: ILcdAIXMVORFeature.EMISSION
  • Organization name: ILcdAIXMVORFeature.ORGANISATION
  • North reference: ILcdAIXMVORFeature.NORTH_REFERENCE
  • Station declination: ILcdAIXMVORFeature.STATION_DECLINATION
  • Magnetic variation: ILcdAIXMVORFeature.MAGNETIC_VARIATION, ILcdAIXMVORFeature.MAGNETIC_VARIATION_DATE
  • Elevation: ILcdAIXMVORFeature.ELEVATION
  • Elevation accuracy: ILcdAIXMVORFeature.ELEVATION_ACCURACY
  • Geographical accuracy: ILcdAIXMVORFeature.GEO_ACCURACY, ILcdAIXMVORFeature.GEO_ACCURACY_UNIT
  • Geoid undulation: ILcdAIXMVORFeature.GEOID_UNDULATION
  • Vertical datum: ILcdAIXMVORFeature.VERTICAL_DATUM
  • Vertical distance unit: ILcdAIXMVORFeature.VERTICAL_DISTANCE_UNIT
  • Original latitude: ILcdAIXMVORFeature.ORIGINAL_LATITUDE
  • Original longitude: ILcdAIXMVORFeature.ORIGINAL_LONGITUDE
  • Original horizontal datum: ILcdAIXMVORFeature.ORIGINAL_DATUM
  • Free text remarks: ILcdAIXMVORFeature.REMARK
• Version 4.0, 4.5 : no extra fields added.

AIXM handlers rely on a specific set of key features that uniquely define an object. This set of features must always be included in the set of features to be decoded. For VORs the key features are:

• IDENTIFIER
• ORIGINAL_LATITUDE
• ORIGINAL_LONGITUDE

The following features are currently not supported:

• VOR Timetable
• Features of the responsible organization or authority (except for the name)
• VOR Broadcasting Service
• VOR Limitation

See Also:

TLcdAIXMVORModelDescriptor

Constructor Summary

Constructors

Constructor and Description
TLcdAIXMVORHandler() Creates a new TLcdAIXMVORHandler instance.

Method Summary

Modifier and Type	Method and Description
void	endDocument() Receive notification of the end of an AIXM document.
void	endElement(String aElementName, String aContent, Stack aElementStack) Receive notification of the end of an AIXM element.
ILcdAIXMModelFilter	getAIXMModelFilter() Returns the currently registered filter.
ILcdBounds	getBoundsToFilterOn() Returns the bounds that will be used as a filter on the model created by this handler.
TLcdAISDataObjectFactory	getDataObjectFactory() Returns the factory to be used to create domain objects.
ALcdAISObjectFactory	getDomainFactory() Deprecated.
String[]	getElementsToBeHandled() Returns the elements for which the methods startElement and endElement should be invoked.
ILcdBounds	getInitialBounds() Returns the bounds to be used as initial bounds for the model created by this handler.
ILcdFeatureIndexedAnd2DBoundsIndexedModel	getModel() Returns the model build by this handler.
String[]	getVORFeatureNamesToBeDecoded() Returns the AIXM VOR features which are decoded into the featured model objects.
boolean	isTraceOn() Deprecated. This method has been deprecated. It is recommended to use the standard Java logging framework directly.
void	newModel(String aSource, ILcdAIXMErrorMessageSupport aErrorMessage) Resets the internal state of this handler so that it is ready to handle a new data source from scratch.
void	setAIXMModelFilter(ILcdAIXMModelFilter aFilter) Specifies a filter to be used while creating the model.
void	setBoundsToFilterOn(ILcdBounds aBoundsToFilterOn) Specifies a bounds that will be used as a filter on the model created by this handler.
static void	setClassTraceOn(boolean aClassTraceOn) Deprecated. This method has been deprecated. It is recommended to use the standard Java logging framework directly.
void	setDataObjectFactory(TLcdAISDataObjectFactory aFactory) Specifies the factory to be used to create domain objects.
void	setDomainFactory(ALcdAISObjectFactory aDomainFactory) Deprecated.
void	setInitialBounds(ILcdBounds aInitialBounds) Specifies a bounds to be used as initial bounds for the model created by this handler.
boolean	setModelToUpdate(String aSource, ILcdModel aModel, ILcdAIXMErrorMessageSupport aErrorMessage) Sets the internal state of this handler so that it is ready to update the given model with a new data source.
void	setTraceOn(boolean aTraceOn) Deprecated. This method has been deprecated. It is recommended to use the standard Java logging framework directly.
void	setVORFeatureNamesToBeDecoded(String[] aVORFeatureNamesToBeDecoded) Sets the AIXM VOR features which need to be decoded into the featured model objects.
void	startDocument() Receive notification of the beginning of an AIXM document.
void	startElement(String aElementName, ILcdAssocSet aAttributes, Stack aElementStack) Receive notification of the beginning of an AIXM element.
void	updateModel() Applies the updates that are read to the model.

Methods inherited from class java.lang.Object

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

Constructor Detail

TLcdAIXMVORHandler

public TLcdAIXMVORHandler()

Creates a new TLcdAIXMVORHandler instance.

Method Detail

startElement

public void startElement(String aElementName,
                         ILcdAssocSet aAttributes,
                         Stack aElementStack)

Description copied from interface: ILcdAIXMHandler

Receive notification of the beginning of an AIXM element.

This method will be invoked at the beginning of every element in the AIXM document; there will be a corresponding endElement event for every startElement event (even when the element is empty). All of the element's content will be reported, in order, before the corresponding endElement event.

The attributes attached to the element are available through an immutable ILcdAssocSet. Only the following methods of the interface are available:

• public int size()
• public boolean hasValue(Object aObject)
• public Object getValue(Object aKey)
• public Enumeration keys()
• public Enumeration elements()

An UnsupportedOperationException will be thrown if one of the other methods are called.

Parameters:

aElementName - The name of the element.

aAttributes - The attributes attached to the element.

aElementStack - A stack containing the element names of all the parents of the current element and itself.

See Also:

ILcdAIXMHandler.endElement(java.lang.String, java.lang.String, java.util.Stack)

endElement

public void endElement(String aElementName,
                       String aContent,
                       Stack aElementStack)

Description copied from interface: ILcdAIXMHandler

Receive notification of the end of an AIXM element.

This method will be invoked at the end of every element in the AIXM document; there will be a corresponding startElement event for every endElement event (even when the element is empty).

Parameters:

aElementName - The name of the element.

aContent - The contents of the current element, or the empty string if the element was empty.

aElementStack - A stack containing the element names of all the parents of the current element and itself.

getVORFeatureNamesToBeDecoded

public String[] getVORFeatureNamesToBeDecoded()

Returns the AIXM VOR features which are decoded into the featured model objects.

Returns:

the AIXM VOR features which are decoded into the featured model objects.

setVORFeatureNamesToBeDecoded

public void setVORFeatureNamesToBeDecoded(String[] aVORFeatureNamesToBeDecoded)

Sets the AIXM VOR features which need to be decoded into the featured model objects. By default, all available features are decoded.

Note that AIXM handlers rely on a specific set of key features that uniquely define an object. This set of features must always be included in the set of features to be decoded. See the class documentation for the key feature list of this handler.

Parameters:

aVORFeatureNamesToBeDecoded - the AIXM VOR features which need to be decoded into the featured model objects.

newModel

public void newModel(String aSource,
                     ILcdAIXMErrorMessageSupport aErrorMessage)

Description copied from interface: ILcdAIXMHandler

Resets the internal state of this handler so that it is ready to handle a new data source from scratch.

The user should call this method before using this handler in a decoding process of an AIXM snapshot.

Specified by:

newModel in interface ILcdAIXMHandler

Parameters:

aSource - the name of the source that will be handled

aErrorMessage - for each irregular situation during the decoding, a report should be added to this object

setModelToUpdate

public boolean setModelToUpdate(String aSource,
                                ILcdModel aModel,
                                ILcdAIXMErrorMessageSupport aErrorMessage)

Description copied from interface: ILcdAIXMHandler

Sets the internal state of this handler so that it is ready to update the given model with a new data source.

The user should call this method before using this handler in a decoding process of an AIXM update.

Specified by:

setModelToUpdate in interface ILcdAIXMHandler

Parameters:

aSource - the name of the source that will be handled

aModel - the model that must be updated

aErrorMessage - for each irregular situation during the decoding, a report should be added to this object

startDocument

public void startDocument()

Description copied from interface: ILcdAIXMHandler

Receive notification of the beginning of an AIXM document.

Specified by:

startDocument in interface ILcdAIXMHandler

See Also:

ILcdAIXMHandler.endDocument()

endDocument

public void endDocument()

Description copied from interface: ILcdAIXMHandler

Receive notification of the end of an AIXM document.

Specified by:

endDocument in interface ILcdAIXMHandler

See Also:

ILcdAIXMHandler.startDocument()

setDomainFactory

@Deprecated
public void setDomainFactory(ALcdAISObjectFactory aDomainFactory)

Deprecated.

Description copied from interface: ILcdAIXMHandler

Specifies the domainFactory to be used to create domain objects.

The given domainFactory must not be null. Note that if a data object factory is set, the domain factory will not be used.

Specified by:

setDomainFactory in interface ILcdAIXMHandler

Parameters:

aDomainFactory - the domainFactory to be used to create domain objects

See Also:

ILcdAIXMHandler.getDomainFactory()

getDomainFactory

@Deprecated
public ALcdAISObjectFactory getDomainFactory()

Deprecated.

Description copied from interface: ILcdAIXMHandler

Returns the domainFactory to be used to create domain objects.

Specified by:

getDomainFactory in interface ILcdAIXMHandler

Returns:

the domainFactory to be used to create domain objects

See Also:

ILcdAIXMHandler.setDomainFactory(com.luciad.ais.model.ALcdAISObjectFactory)

setDataObjectFactory

public void setDataObjectFactory(TLcdAISDataObjectFactory aFactory)

Description copied from interface: ILcdAIXMHandler

Specifies the factory to be used to create domain objects.

The given factory must not be null.

Specified by:

setDataObjectFactory in interface ILcdAIXMHandler

Parameters:

aFactory - the domainFactory to be used to create domain objects

See Also:

ILcdAIXMHandler.getDataObjectFactory()

getDataObjectFactory

public TLcdAISDataObjectFactory getDataObjectFactory()

Description copied from interface: ILcdAIXMHandler

Returns the factory to be used to create domain objects.

Specified by:

getDataObjectFactory in interface ILcdAIXMHandler

Returns:

the factory to be used to create domain objects

See Also:

ILcdAIXMHandler.setDataObjectFactory(TLcdAISDataObjectFactory)

updateModel

public void updateModel()

Description copied from interface: ILcdAIXMHandler

Applies the updates that are read to the model.

Please remark that this handler is only capable of updating the model if the user calls

• the setModelToUpdate method to set the model that has to be updated,
• the startDocument method before the first call of the startElement method,
• the startElement method each time the beginning of an element in the data source is found,
• the endElement method each time the end of an element in the data source is found,
• the endDocument method after the last call of the endElement method.

Specified by:

updateModel in interface ILcdAIXMHandler

getModel

public ILcdFeatureIndexedAnd2DBoundsIndexedModel getModel()

Description copied from interface: ILcdAIXMHandler

Returns the model build by this handler.

Please remark that this handler is only capable of creating the expected model if the user calls

• the newModel method to reset the internal state before he or she starts the decoding process,
• the startDocument method before the first call of the startElement method,
• the startElement method each time the beginning of an element in the data source is found,
• the endElement method each time the end of an element in the data source is found,
• the endDocument method after the last call of the endElement method.

Specified by:

getModel in interface ILcdAIXMHandler

Returns:

the model build by this handler

setBoundsToFilterOn

public void setBoundsToFilterOn(ILcdBounds aBoundsToFilterOn)

Description copied from interface: ILcdAIXMHandler

Specifies a bounds that will be used as a filter on the model created by this handler.

If this bounds is null, all objects found in the data source will be inserted into the model. If this bounds is not null, only the objects whose bounds interact with the specified bounds will be inserted into the model.

Specified by:

setBoundsToFilterOn in interface ILcdAIXMHandler

Parameters:

aBoundsToFilterOn - the bounds to be used as a filter

getBoundsToFilterOn

public ILcdBounds getBoundsToFilterOn()

Description copied from interface: ILcdAIXMHandler

Returns the bounds that will be used as a filter on the model created by this handler.

Specified by:

getBoundsToFilterOn in interface ILcdAIXMHandler

Returns:

the bounds that will be used as a filter on the model created by this handler

See Also:

ILcdAIXMHandler.setBoundsToFilterOn(com.luciad.shape.ILcdBounds)

setInitialBounds

public void setInitialBounds(ILcdBounds aInitialBounds)

Description copied from interface: ILcdAIXMHandler

Specifies a bounds to be used as initial bounds for the model created by this handler.

This bounds should be large enough to enclose (most of) the model objects. This option is used to avoid to many expansions of the model bounds.

This parameter may be null.

Note: This bounds is not a filter! If a model objects bounds does not interact with aInitialBounds, aInitialBounds will be enlarged to enclose the object.

Specified by:

setInitialBounds in interface ILcdAIXMHandler

Parameters:

aInitialBounds - the initial bounds for the model created by this handler

getInitialBounds

public ILcdBounds getInitialBounds()

Description copied from interface: ILcdAIXMHandler

Returns the bounds to be used as initial bounds for the model created by this handler.

Specified by:

getInitialBounds in interface ILcdAIXMHandler

Returns:

bounds to be used as initial bounds for the model created by this handler

See Also:

ILcdAIXMHandler.setInitialBounds(com.luciad.shape.ILcdBounds)

setAIXMModelFilter

public void setAIXMModelFilter(ILcdAIXMModelFilter aFilter)

Description copied from interface: ILcdAIXMHandler

Specifies a filter to be used while creating the model. Only model objects that pass through the filter will be in the resulting model.

Specified by:

setAIXMModelFilter in interface ILcdAIXMHandler

Parameters:

aFilter - an ILcdAIXMModelFilter to filter the model objects

getAIXMModelFilter

public ILcdAIXMModelFilter getAIXMModelFilter()

Returns the currently registered filter.

Returns:

the currently registered filter (can be null).

getElementsToBeHandled

public String[] getElementsToBeHandled()

Description copied from interface: ILcdAIXMHandler

Returns the elements for which the methods startElement and endElement should be invoked.

These elements must be a direct child of one of the following AIXM elements:

• AIXM-Snapshot
• Changed
• New
• Withdrawn

See the AIXM XML Schema documents for a list of possible childs.

Specified by:

getElementsToBeHandled in interface ILcdAIXMHandler

Returns:

A String array containing the elements for which the methods startElement and endElement should be invoked.

isTraceOn

public boolean isTraceOn()

Deprecated. This method has been deprecated. It is recommended to use the standard Java logging framework directly.

Returns true if tracing is enabled for this class.

Returns:

true if tracing is enabled for this class, false otherwise.

setClassTraceOn

public static void setClassTraceOn(boolean aClassTraceOn)

Deprecated. This method has been deprecated. It is recommended to use the standard Java logging framework directly.

Enables tracing for all instances of this class. If the argument is true then all log messages are recorded, otherwise only the informative, warning and error messages are recorded.

Parameters:

aClassTraceOn - if true then all log messages are recorded, otherwise only the informative, warning and error messages are recorded.

setTraceOn

public void setTraceOn(boolean aTraceOn)

Deprecated. This method has been deprecated. It is recommended to use the standard Java logging framework directly.

Enables tracing for this class instance. Calling this method with either true or false as argument automatically turns off tracing for all other class instances for which setTraceOn has not been called. If the argument is false then only the informative, warning and error log messages are recorded.

Parameters:

aTraceOn - if true then all log messages are recorded for this instance. If false, then only the informative, warning and error log messages are recorded.