@LcdService(service=ILcdModelDecoder.class, priority=20000) public class TLcdLRDBModelDecoder extends Object implements ILcdModelDecoder
This format is intended for use only with existing Luciad applications and should not be used otherwise.
If you are looking for an SQLite-based exchange format, we advise to use OGC GeoPackage
instead.
File | Required | Entry point | Description |
---|---|---|---|
*.lrdb | X | X | The database file |
ILcdDataSourceModelDescriptor
and ILcdEarthModelDescriptor
interfaces.IMAGERY_TYPE_NAME
or ELEVATION_TYPE_NAME
depending on the content of the LRDB file.com.luciad.reference.ILcdGridReference
or
com.luciad.reference.ILcdGeodeticReference
.ALcdImage
and ILcdEarthTileSet
.Modifier and Type | Field and Description |
---|---|
static String |
ELEVATION_TYPE_NAME
Type name constant for LRDB models containing elevation data.
|
static String |
IMAGERY_TYPE_NAME
Type name constant for LRDB models containing imagery (RGBA) data.
|
Constructor and Description |
---|
TLcdLRDBModelDecoder()
Creates a new LRDB model decoder.
|
Modifier and Type | Method and Description |
---|---|
boolean |
canDecodeSource(String aSourceName)
Checks whether this model decoder can decode the specified data source.
|
ILcdModel |
decode(String aSourceName)
Creates a new model from the given data source.
|
String |
getDisplayName()
Returns a short, displayable name for the format that is decoded by this
ILcdModelDecoder . |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
canDecodeSource, decodeModelMetadata, decodeModelMetadata, decodeSource, discoverDataSources
public static final String IMAGERY_TYPE_NAME
public static final String ELEVATION_TYPE_NAME
public TLcdLRDBModelDecoder()
public String getDisplayName()
ILcdModelDecoder
ILcdModelDecoder
.getDisplayName
in interface ILcdModelDecoder
ILcdModelDecoder
.public boolean canDecodeSource(String aSourceName)
ILcdModelDecoder
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.
canDecodeSource
in interface ILcdModelDecoder
aSourceName
- the data source to be verified; typically a file name or a URL.true
if this decoder can likely decode the data specified by the source name, false
otherwise.ILcdModelDecoder.decode(String)
,
ILcdModelDecoder.decodeModelMetadata(String)
public ILcdModel decode(String aSourceName) throws IOException
ILcdModelDecoder
decode
in interface ILcdModelDecoder
aSourceName
- the data source to be decoded; typically a file name or a URL.null
is allowed, implementors are advised to throw an error instead.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.ILcdModelDecoder.canDecodeSource(String)