com.luciad.format.gml3

LuciadLightspeedClass TLcdGML3ModelDecoder

java.lang.Object

com.luciad.format.gml3.TLcdGML3ModelDecoder

All Implemented Interfaces:

ILcdInputStreamFactoryCapable, ILcdModelDecoder

Deprecated.

This class has been deprecated. The GML decoders and encoders in the com.luciad.format.gml3.* packages are replaced by new decoders and encoders in the packages com.luciad.format.gml2.xml, com.luciad.format.gml31.xml and com.luciad.format.gml32.xml.

@Deprecated
public class TLcdGML3ModelDecoder
extends Object
implements ILcdModelDecoder, ILcdInputStreamFactoryCapable

Decoder for GML documents. Current document requirements and limitations:

• The document must be based on GML 2.1.2 or higher.
• All XML document contents are read, but interpretation is only done for the following elements:
  • elements of the base schema,
  • elements of the feature schema, and
  • all geometries from the GML Simple Features Profile.
  All other XML elements will still be available as generic ILcdXMLElement objects.
• XLINK references are currently not supported.
• A valid XML Schema must be available.
• GML allows individual features to have their own, local coordinate reference system, different from its container's reference (i.e., the global crs of the feature collection). LuciadLightspeed models and modellist can only have one model reference. All features having a local crs differing from the global one, will be transformed to the global crs. The global crs will be the first one that is read (typically the crs of the feature collection's envelope).
• Currently, the following coordinate reference systems are supported:
  • All EPSG reference systems, supported by the TLcdEPSGReferenceParser class, and
  • the following reference systems, using the URN's (Uniform Resource Names), defined by the OGC: WGS84, NAD83 and NAD27.

A sample GML document looks as follows:

   <gml:FeatureCollection>
     <gml:boundedBy> .. </gml:boundedBy>
     <gml:featureMember>
       <myns:MyFeature>
         <gml:boundedBy> ... <gml:boundedBy>
         <myns:geomProperty>
           <gml:Polygon> ... </gml:Polygon>
         <t;/myns:geomProperty>
         <myns:customProperty>customValue</myns:customProperty>
       </myns:MyFeature>
     </gml:featureMember>
   </gml:FeatureCollection>
 

The corresponding decoded model can be accessed in three different ways:

• via the com.luciad.format.gml3.model domain model interface, to explore the original GML content:

   ILcdGML3FeatureCollection (gml:FeatureCollection)
     |
     +-- ILcdGML3BoundingShape (gml:boundedBy)
     |
     +-- ILcdGML3FeatureProperty (gml:featureMember)
         |
         +-- ILcdGML3AbstractFeature/ILcdXMLElement (myns:MyFeature)
             |
             +-- ILcdGML3BoundingShape (gml:boundedBy)
             |
             +-- ILcdGML3SurfaceProperty (myns:geomProperty)
                 |
                 +-- ILcdGML3Polygon (gml:Polygon)
   

• via common LuciadLightspeed model and shape interfaces, to use the data within other LuciadLightspeed components. Note that not all GML contents are available via this interface:

   ILcd(2DBoundsIndexed)Model (gml:FeatureCollection)
     |
     +-- ILcdBounded/ILcdXMLElement (myns:MyFeature)
         |
         +--  ILcdGML3SurfaceProperty (myns:geomProperty)
              |
              +-- ILcdPolygon (gml:Polygon)
  
   

• or via the ILcdXMLElement interface, to access the complete XML structure of the document, including namespaces:

   ILcdXMLElement (gml:FeatureCollection)
     |
     +-- ILcdXMLElement (gml:boundedBy)
     |
     +-- ILcdXMLElement (gml:featureMember)
         |
         +-- ILcdXMLElement (myns:MyFeature)
             |
             +-- ILcdXMLElement (gml:boundedBy)
             |
             +-- ILcdXMLElement (myns:geomProperty)
             |   |
             |   +-- ILcdXMLElement (gml:Polygon)
             |
             +-- ILcdXMLElement (myns:customProperty)
   

Custom-defined XML data is handled as follows:

• All domain model implementations generated by this decoder shall implement the ILcdXMLElement interface. All child elements of an element will be available via this interface, both standard GML elements that are also available via GML domain model interfaces, and custom-defined elements that were added.
• All custom XML elements, or standard GML elements for which no handler and/or domain model interface are available, are decoded using a standard XML handler, and put into an ILcdXMLElement object.

E.g., the myns:MyFeature element extends the gml:AbstractGMLFeature type, and adds a new element, myns:geomProperty. This property cannot be accessed via the ILcdGML3AbstractFeature interface, but can be reached via the ILcdXMLElement interface of the feature.
The myns:customProperty is a custom defined element for which no handler is available. It will be decoded using the default XML handler, put into a ILcdXMLElement object, and will be available in the model through the ILcdXMLElement interface of its parent element.

The ILcdXMLElement interface is the only interface through which the original document's content is always fully reachable, while the other two interfaces offer only limited views on the document for specific purposes, related to GML or LuciadLightspeed.

For more information about the default implementations of the GML domain model, see the default GML object factory's documentation.

Field Summary

Fields

Modifier and Type	Field and Description
static String	GML_32_NAMESPACE_URI Deprecated.
static String	GML_NAMESPACE_URI Deprecated.

Constructor Summary

Constructors

Constructor and Description
TLcdGML3ModelDecoder() Deprecated. Creates a new GML3 model decoder, initialized with appropriate GML element reader and object factory providers, and schema locations.
TLcdGML3ModelDecoder(ILcdXMLSchemaProvider aSchemaProvider) Deprecated. Creates a new GML3 model decoder, initialized with appropriate GML element reader and object factory providers, and schema locations.

Method Summary

Modifier and Type	Method and Description
boolean	canDecodeSource(String aSourceAsString) Deprecated. Checks whether this model decoder can decode the specified data source.
ILcdModel	decode(String aSourceName) Deprecated. Creates a new model from the given data source.
String	getDisplayName() Deprecated. Returns a short, displayable name for the format that is decoded by this ILcdModelDecoder.
ILcdXMLTypedElementReaderProvider	getElementReaderProvider() Deprecated. Returns the ILcdXMLTypedElementReaderProvider that is used by this decoder.
ILcdInputStreamFactory	getInputStreamFactory() Deprecated. Returns the ILcdInputStreamFactory that is used by this model decoder.
ILcdXMLObjectFactoryProvider	getObjectFactoryProvider() Deprecated. Returns the ILcdXMLObjectFactoryProvider that is used by this decoder.
ILcdXMLPrefixMap	getPrefixMap() Deprecated. Returns the prefix map that is used by this decoder.
ILcdXMLSchemaLocationsMap	getSchemaLocationsMap() Deprecated. Returns the schema locations map used by this decoder.
ILcdXMLSchemaProvider	getSchemaProvider() Deprecated. Returns the ILcdXMLSchemaProvider that is used by this decoder.
void	registerFactory(TLcdXMLName aTypeName, ILcdXMLObjectFactory aTypeFactory) Deprecated. Registers an object factory for the given typename.
void	registerReader(TLcdXMLName aTypeName, ILcdXMLElementReader aReader) Deprecated. Registers an element reader for the given typename.
void	registerReader(TLcdXMLName aTypeName, TLcdXMLName[] aElementNameStack, ILcdXMLElementReader aReader) Deprecated. Registers the given reader for the anonymous XML type, identified by the given element name stack, and, if the element name stack is contained within a named type, the name of that type.
void	setInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory) Deprecated. Sets the ILcdInputStreamFactory to be used by this model decoder.
void	setPrefixMap(ILcdXMLPrefixMap aPrefixMap) Deprecated. Sets the prefix map to be used by this decoder.
void	setSchemaLocationsMap(ILcdXMLSchemaLocationsMap aSchemaLocationsMap) Deprecated. Sets the schema locations map to be used by this decoder.

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, decodeModelMetadata, decodeModelMetadata, decodeSource, discoverDataSources

Field Detail

GML_NAMESPACE_URI

public static final String GML_NAMESPACE_URI

Deprecated.

See Also:

Constant Field Values

GML_32_NAMESPACE_URI

public static final String GML_32_NAMESPACE_URI

Deprecated.

See Also:

Constant Field Values

Constructor Detail

TLcdGML3ModelDecoder

public TLcdGML3ModelDecoder()

Deprecated.

Creates a new GML3 model decoder, initialized with appropriate GML element reader and object factory providers, and schema locations.

TLcdGML3ModelDecoder

public TLcdGML3ModelDecoder(ILcdXMLSchemaProvider aSchemaProvider)

Deprecated.

Creates a new GML3 model decoder, initialized with appropriate GML element reader and object factory providers, and schema locations. The given schema provider will be used for the decoding of schemas. If the given schema provider doesn't contain all schemas that can be expected in the application, it can use the ILcdXMLSchemaLocationsMap provided by this decoder to retrieve additional locations declared in the XML documents.

Parameters:

aSchemaProvider - the schema provider to use.

Method Detail

setInputStreamFactory

public void setInputStreamFactory(ILcdInputStreamFactory aInputStreamFactory)

Deprecated.

Sets the ILcdInputStreamFactory to be used by this model decoder.

Specified by:

setInputStreamFactory in interface ILcdInputStreamFactoryCapable

Parameters:

aInputStreamFactory - the input stream factory to be used by this model decoder.

Throws:

NullPointerException - if aInputStreamFactory == null.

getInputStreamFactory

public ILcdInputStreamFactory getInputStreamFactory()

Deprecated.

Returns the ILcdInputStreamFactory that is used by this model decoder.

Specified by:

getInputStreamFactory in interface ILcdInputStreamFactoryCapable

Returns:

the ILcdInputStreamFactory that is used by this model decoder.

setSchemaLocationsMap

public void setSchemaLocationsMap(ILcdXMLSchemaLocationsMap aSchemaLocationsMap)

Deprecated.

Sets the schema locations map to be used by this decoder.

Parameters:

aSchemaLocationsMap - the schema locations map in which to store new locations.

See Also:

TLcdXMLDecoder.setSchemaLocationsMap(com.luciad.format.xml.schema.ILcdXMLSchemaLocationsMap)

getSchemaLocationsMap

public ILcdXMLSchemaLocationsMap getSchemaLocationsMap()

Deprecated.

Returns the schema locations map used by this decoder.

Returns:

the schema locations map used by this decoder.

See Also:

setSchemaLocationsMap(com.luciad.format.xml.schema.ILcdXMLSchemaLocationsMap)

setPrefixMap

public void setPrefixMap(ILcdXMLPrefixMap aPrefixMap)

Deprecated.

Sets the prefix map to be used by this decoder.

Parameters:

aPrefixMap - the prefix map to be used by this decoder.

See Also:

TLcdXMLDecoder.setPrefixMap(com.luciad.format.xml.ILcdXMLPrefixMap)

getPrefixMap

public ILcdXMLPrefixMap getPrefixMap()

Deprecated.

Returns the prefix map that is used by this decoder.

Returns:

the prefix map that is used by this decoder.

See Also:

setPrefixMap(com.luciad.format.xml.ILcdXMLPrefixMap)

getObjectFactoryProvider

public ILcdXMLObjectFactoryProvider getObjectFactoryProvider()

Deprecated.

Returns the ILcdXMLObjectFactoryProvider that is used by this decoder.

Returns:

the ILcdXMLObjectFactoryProvider that is used by this decoder.

getElementReaderProvider

public ILcdXMLTypedElementReaderProvider getElementReaderProvider()

Deprecated.

Returns the ILcdXMLTypedElementReaderProvider that is used by this decoder.

Returns:

the ILcdXMLTypedElementReaderProvider that is used by this decoder.

getSchemaProvider

public ILcdXMLSchemaProvider getSchemaProvider()

Deprecated.

Returns the ILcdXMLSchemaProvider that is used by this decoder.

Returns:

the ILcdXMLSchemaProvider that is used by this decoder.

registerFactory

public void registerFactory(TLcdXMLName aTypeName,
                            ILcdXMLObjectFactory aTypeFactory)

Deprecated.

Registers an object factory for the given typename.

Parameters:

aTypeName - the typename for which to register the given object factory.

aTypeFactory - the object factory to be registered.

registerReader

public void registerReader(TLcdXMLName aTypeName,
                           ILcdXMLElementReader aReader)

Deprecated.

Registers an element reader for the given typename.

Parameters:

aTypeName - the typename for which to register the given element reader.

aReader - the element reader to be registered.

registerReader

public void registerReader(TLcdXMLName aTypeName,
                           TLcdXMLName[] aElementNameStack,
                           ILcdXMLElementReader aReader)

Deprecated.

Registers the given reader for the anonymous XML type, identified by the given element name stack, and, if the element name stack is contained within a named type, the name of that type.

Parameters:

aTypeName - The XML type name from which the specified element name stack is part of.

aElementNameStack - The element name stack, identifying the XML type within the provided XML type.

aReader - A reader to process the given element.

Throws:

NullPointerException - if aReader == null.

getDisplayName

public String getDisplayName()

Deprecated.

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

Returns:

the displayable name of this ILcdModelDecoder.

canDecodeSource

public boolean canDecodeSource(String aSourceAsString)

Deprecated.

Description copied from interface: ILcdModelDecoder

Checks whether this model decoder can decode the specified data source. It is acceptable for this method to return true for a source name while decode throws an exception for that same source name.

For performance reasons, we strongly recommend that this will only be a simple test. For example: check the file extension of a file, but not that the file exists or contains expected content.

Specified by:

canDecodeSource in interface ILcdModelDecoder

Parameters:

aSourceAsString - the data source to be verified; typically a file name or a URL.

Returns:

true if this decoder can likely decode the data specified by the source name, false otherwise.

See Also:

ILcdModelDecoder.decode(String), ILcdModelDecoder.decodeModelMetadata(String)

decode

public ILcdModel decode(String aSourceName)
                 throws IOException

Deprecated.

Description copied from interface: ILcdModelDecoder

Creates a new model from the given data source.

Specified by:

decode in interface ILcdModelDecoder

Parameters:

aSourceName - the data source to be decoded; typically a file name or a URL.

Returns:

A model containing the decoded data. While null is allowed, implementors are advised to throw an error instead.

Throws:

IOException - for any exceptions caused by IO problems or invalid data. Since decoding invalid data almost always results in RunTimeExceptions (NullPointerException, IndexOutOfBoundsException, IllegalArgumentException, ...) on unexpected places, implementations are advised to catch RuntimeExceptions in their decode() method, and wrap them into an IOException, as illustrated in the code snippet below.

   public ILcdModel decode( String aSourceName ) throws IOException {
      try (InputStream input = fInputStreamFactory.createInputStream(aSourceName)) {
         // Perform decoding ...
      } catch (RuntimeException e) {
         throw new IOException(e);
      }
   }
 

InterruptedIOException - When the thread on which this method is called is interrupted: it is recommended to stop the decoding and throw an InterruptedIOException. This same exception can also be used if the decoder shows UI to the user, and the user cancels the decoding through the UI.

See Also:

ILcdModelDecoder.canDecodeSource(String)