com.luciad.format.dafift.decoder

Aviation StandardsClass TLcdDAFIFTHelipadDecoder

java.lang.Object

com.luciad.format.dafift.decoder.ALcdDAFIFTModelDecoder

com.luciad.format.dafift.decoder.TLcdDAFIFTHelipadDecoder

All Implemented Interfaces:

ILcdInputStreamFactoryCapable, ILcdModelDecoder

Direct Known Subclasses:

TLcdDAFIFTIndependentHelipadDecoder

public class TLcdDAFIFTHelipadDecoder
extends ALcdDAFIFTModelDecoder

Implementation of ILcdModelDecoder that decodes DAFIFT helipad objects from the specified source directory. The decoded models have as model descriptor an instance of TLcdDAFIFHelipadModelDescriptor.

DAFIFT distinguishes three kinds of helipads:

• rectangular helipads with a length shorter than 500 feet,
• rectangular helipads with a length equal or greater than 500 feet.

Rectangular helipads are created as a polygon defined by the four corners of the helipad. The two known locations high end and low end are located on the center line of the helipad. The corners of the helipad lie on both sides of the high respectively low end at a distance of half the width.

Since helipads shorter than 500 feet have only one location, there is no way of knowing what the angle of the rectangle should be when it's drawn. Therefore these helipads are represented by a polygon containing only one point instead of four. Special Painters must be used to draw these single point helipads on the map.

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 decoder, the type of the decoded objects is TLcdDAFIFTDataTypes.Helipad, which can also be retrieved through ILcdDataObject.getDataType(). The available properties of the objects are defined in TLcdDAFIFTHelipadDataProperties. 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 setHelipadFeaturesToBeDecoded method allows the user to specify which DAFIFT features are to be decoded into the featured model objects. If no features are specified, all features will be decoded.

The following fields (which are taken from the National Imagery and Mapping Agency (NIMA) Product Specifications for Digital Aeronautical Flight Information File (DAFIF), Eight Edition, January 2005) are supported by the decoder. The list indicates into which feature the fields are decoded.

• HELIPORT IDENTIFICATION: ILcdDAFIFHelipadFeature.HELIPORT_ID
• SEQUENCE NUMBER: ILcdDAFIFHelipadFeature.SEQUENCE_NUMBER
• SURFACE: ILcdDAFIFHelipadFeature.SURFACE
• LANDING AREA AIRCRAFT TYPE: ILcdDAFIFHelipadFeature.LANDING_AREA_AIRCRAFT_TYPE
• CLOSED UNUSABLE HELIPAD/RUNWAY: ILcdDAFIFHelipadFeature.CLOSED
• LIGHTING SYSTEM 1: ILcdDAFIFHelipadFeature.LGT_SYS1
• LIGHTING SYSTEM 2: ILcdDAFIFHelipadFeature.LGT_SYS2
• LIGHTING SYSTEM 3: ILcdDAFIFHelipadFeature.LGT_SYS3
• PAD IDENTIFIER (UNDER 500' IN LENGTH): ILcdDAFIFHelipadFeature.PAD_IDENTIFIER
• CYCLE DATE: ILcdDAFIFHelipadFeature.CYCLE_DATE

All DAFIFT decoders 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 helipads, the key features are:

• ILcdDAFIFHelipadFeature.HELIPORT_ID
• ILcdDAFIFHelipadFeature.SEQUENCE_NUMBER

Helipads belong to a heliport. The TLcdDAFIFTHelipadDecoder does not decode the heliports necessary to produce a helipad model. A heliport model should be specified by using the setHeliportModel method. A unique index containing the ILcdAerodromeFeature.IDENTIFICATION feature is added on this heliport model. The feature should have been decoded into the featured model objects of the heliport model.

Since:

7.2

See Also:

ILcdDAFIFHelipadFeature, TLcdDAFIFHelipadModelDescriptor

Constructor Summary

Constructors

Constructor and Description
TLcdDAFIFTHelipadDecoder(ALcdAISObjectFactory aDomainFactory) Deprecated.
TLcdDAFIFTHelipadDecoder(TLcdAISDataObjectFactory aFactory) Constructs a new TLcdDAFIFTHelipadDecoder object.

Method Summary

Modifier and Type	Method and Description
boolean	canDecodeSource(String aSource) Returns true if the specified source is: A file with the specific name corresponding to the object type of this decoder A directory containing such a file A .toc file in a directory, pointing to such a file
ILcdModel	decode(String aSource) Checks whether a heliport model is set before starting the decode process.
TLcdAISDataObjectFactory	getDataObjectFactory() Returns the factory that is used to create domain objects.
String	getDisplayName() Returns a short, displayable name for the format that is decoded by this ILcdModelDecoder.
ALcdAISObjectFactory	getDomainFactory() Deprecated. Use getDataObjectFactory()
String	getErrorMessage() Returns the error message of the last decode call.
ILcdInputStreamFactory	getInputStreamFactory() Returns the input stream factory that is currently used for creating the input streams for the given source names.
int	getMaxNumberOfErrorReports() Returns the number of error reports to be added to the error message.
ILcdDAFIFTRecordFilter	getRecordFilter() Returns the record filter that is currently used.
String[]	getUniqueKeyFeatureNames() Returns the array of String objects containing the names of the features that will be used as a unique key to insert objects into the model.
void	setDataObjectFactory(TLcdAISDataObjectFactory aFactory) Specifies the data factory.
void	setDomainFactory(ALcdAISObjectFactory aDomainFactory) Deprecated. Use setDataObjectFactory(TLcdAISDataObjectFactory)
void	setHelipadDefaultDisplayNameIndex(int aIndex) Specifies the index of the feature to be the helipad display name.
void	setHelipadFeaturesToBeDecoded(String[] aFeaturesToBeDecoded) Specifies the ATS route features to be decoded into the model objects.
void	setHeliportModel(ILcdFeatureIndexedModel aHeliportModel) Specifies the model containing the heliport objects this decoder should use.
void	setInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory) Sets the input stream factory that will be used for creating the input streams for the given source names.
void	setMaxNumberOfErrorReports(int aMaxNumberOfErrorReports) Specifies a value for the maximum number of error reports.
void	setRecordFilter(ILcdDAFIFTRecordFilter aRecordFilter) Specifies a filter to be used while creating the model.

Methods inherited from class com.luciad.format.dafift.decoder.ALcdDAFIFTModelDecoder

getDecodingBounds, getModelFilter, setDecodingBounds, setModelFilter

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.luciad.model.ILcdModelDecoder

canDecodeSource, canDecodeSource, decodeModelMetadata, decodeModelMetadata, decodeSource, discoverDataSources

Constructor Detail

TLcdDAFIFTHelipadDecoder

@Deprecated
public TLcdDAFIFTHelipadDecoder(ALcdAISObjectFactory aDomainFactory)

Deprecated.

Constructs a new TLcdDAFIFTHelipadDecoder object. The user should specify which domainFactory he or she wants to use to create the helipads.

Parameters:

aDomainFactory - The factory to be used to create the model objects.

TLcdDAFIFTHelipadDecoder

public TLcdDAFIFTHelipadDecoder(TLcdAISDataObjectFactory aFactory)

Constructs a new TLcdDAFIFTHelipadDecoder object. The user should specify which factory he or she wants to use to create the helipads.

Parameters:

aFactory - The factory to be used to create the model objects.

Method Detail

getDisplayName

public String getDisplayName()

Description copied from interface: ILcdModelDecoder

Returns a short, displayable name for the format that is decoded by this ILcdModelDecoder.

Specified by:

getDisplayName in interface ILcdModelDecoder

Overrides:

getDisplayName in class ALcdDAFIFTModelDecoder

Returns:

the displayable name of this ILcdModelDecoder.

decode

public ILcdModel decode(String aSource)
                 throws IOException

Checks whether a heliport model is set before starting the decode process. If no heliport model is specified, an IllegalStateException object will be thrown.

Returns a model containing the domain objects read from the given source file.

The model will be build by looping through the records found in the source file. Each record that passes the record filter (getRecordFilter()) will be decoded. A decoded record needs to pass two additional filters (a model filter getModelFilter() and a bounds filter getDecodingBounds()) before it can be added to the model.

Furthermore, an error message will be initialized and filled with reports about errors occurred during the decode process. By default, all reports will be added into the error message. The method setMaxNumberOfErrorReports(int) can be used to adjust this setting.

Specified by:

decode in interface ILcdModelDecoder

Parameters:

aSource - Either the directory containing the DAFIFT source file to decode or the DAFIFT source file itself.

Returns:

the model build by reading the file found with the given source.

Throws:

IOException - if an error occurs during the reading process.

IllegalStateException - if no heliport model has been specified.

See Also:

ILcdModelDecoder.canDecodeSource(String)

setHelipadDefaultDisplayNameIndex

public void setHelipadDefaultDisplayNameIndex(int aIndex)

Specifies the index of the feature to be the helipad display name.

Parameters:

aIndex - The index of the feature to be the helipad display name.

setHelipadFeaturesToBeDecoded

public void setHelipadFeaturesToBeDecoded(String[] aFeaturesToBeDecoded)

Specifies the ATS route features to be decoded into the model objects.

Please make sure that the HELIPORT_ID and SEQUENCE_NUMBER features are in your list of features to be decoded!

Parameters:

aFeaturesToBeDecoded - A list of features that should be decoded into the helipad model objects.

setHeliportModel

public void setHeliportModel(ILcdFeatureIndexedModel aHeliportModel)

Specifies the model containing the heliport objects this decoder should use.

Parameters:

aHeliportModel - A model containing heliport objects.

getUniqueKeyFeatureNames

public String[] getUniqueKeyFeatureNames()

Returns the array of String objects containing the names of the features that will be used as a unique key to insert objects into the model.

Returns:

the array of String objects containing the names of the features that will be used as a unique key to insert objects into the model.

canDecodeSource

public boolean canDecodeSource(String aSource)

Returns true if the specified source is:

• A file with the specific name corresponding to the object type of this decoder
• A directory containing such a file
• A .toc file in a directory, pointing to such a file

Parameters:

aSource - the name of the source file or directory that you want to decode

Returns:

a boolean indicating whether the given source can be decoded

getDomainFactory

@Deprecated
public ALcdAISObjectFactory getDomainFactory()

Deprecated. Use getDataObjectFactory()

Returns the factory that is used to create domain objects.

Returns:

the factory that is used to create domain objects.

See Also:

setDomainFactory(ALcdAISObjectFactory)

setDomainFactory

@Deprecated
public void setDomainFactory(ALcdAISObjectFactory aDomainFactory)

Deprecated. Use setDataObjectFactory(TLcdAISDataObjectFactory)

Specifies the domain factory.

The domain factory will be used to create the domain objects decoded by this DAFIFT decoder.

Parameters:

aDomainFactory - The factory that will be used to create domain objects.

See Also:

getDomainFactory()

getDataObjectFactory

public TLcdAISDataObjectFactory getDataObjectFactory()

Returns the factory that is used to create domain objects.

Returns:

the factory that is used to create domain objects.

See Also:

setDomainFactory(ALcdAISObjectFactory)

setDataObjectFactory

public void setDataObjectFactory(TLcdAISDataObjectFactory aFactory)

Specifies the data factory.

The data factory will be used to create the domain objects decoded by this DAFIFT decoder.

Decoders equipped with a data object factory that is not null, will NOT use their associated domain factory (see getDomainFactory()).

Parameters:

aFactory - The factory that will be used to create domain objects.

See Also:

getDomainFactory()

getInputStreamFactory

public ILcdInputStreamFactory getInputStreamFactory()

Returns the input stream factory that is currently used for creating the input streams for the given source names.

Specified by:

getInputStreamFactory in interface ILcdInputStreamFactoryCapable

Returns:

the input stream factory that is currently used.

See Also:

setInputStreamFactory(ILcdInputStreamFactory)

setInputStreamFactory

public void setInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory)

Sets the input stream factory that will be used for creating the input streams for the given source names.

Specified by:

setInputStreamFactory in interface ILcdInputStreamFactoryCapable

Parameters:

aInputStreamFactory - The input stream factory to be used.

See Also:

getInputStreamFactory()

getRecordFilter

public ILcdDAFIFTRecordFilter getRecordFilter()

Returns the record filter that is currently used.

Returns:

the record filter that is currently used.

See Also:

setRecordFilter(ILcdDAFIFTRecordFilter)

setRecordFilter

public void setRecordFilter(ILcdDAFIFTRecordFilter aRecordFilter)

Specifies a filter to be used while creating the model. Only records that pass through this filter will be decoded into model objects.

Parameters:

aRecordFilter - The record filter that should be passed before a record can be decoded.

See Also:

getRecordFilter()

getMaxNumberOfErrorReports

public int getMaxNumberOfErrorReports()

Returns the number of error reports to be added to the error message. If there are more errors than the maxNumberOfErrorReports property, they won't be stored and you won't be able to see these errors in the error message after the decoding process.

Returns:

the number of error reports to be added to the error message.

See Also:

setMaxNumberOfErrorReports(int)

setMaxNumberOfErrorReports

public void setMaxNumberOfErrorReports(int aMaxNumberOfErrorReports)

Specifies a value for the maximum number of error reports. If a negative value is set, all reported errors will be added to the error message.

Parameters:

aMaxNumberOfErrorReports - The maximum number of error reports to be added to the error message.

See Also:

getMaxNumberOfErrorReports()

getErrorMessage

public String getErrorMessage()

Returns the error message of the last decode call.

Note that the error message can only be retrieved once after a decode call.

Returns:

a String object containing the errors occurred during the last decode process.