Package com.luciad.format.sqlite.lvdb

Class TLcdLVDBModelDecoder

java.lang.Object
com.luciad.format.sqlite.lvdb.TLcdLVDBModelDecoder
All Implemented Interfaces:
ILcdModelDecoder
@LcdService(service=ILcdModelDecoder.class, priority=20000) public class TLcdLVDBModelDecoder extends Object implements ILcdModelDecoder
A model decoder that decodes Luciad Vector Databases (LVDB).

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.

Input Files

FileRequiredEntry pointDescription
*.lvdbXXThe database file

Supported file transfer protocols

  • This model decoder supports all transfer protocols that are supported by java.io.File.

Model structure

  • All models returned by this model decoder implement ILcd2DBoundsIndexedModel.

Model descriptor

Model reference

  • All models returned by this model decoder have a com.luciad.reference.ILcdGridReference or com.luciad.reference.ILcdGeodeticReference.

Model elements

  • Each decoded model contains instances of com.luciad.shape.ILcdShapeList that implement com.luciad.datamodel.ILcdDataObject.

Thread safety

  • The decoded models are thread-safe for read access.
Since:
2013.1

  • Constructor Details

    • TLcdLVDBModelDecoder

      public TLcdLVDBModelDecoder()
      Creates a new TLcdLVDBModelDecoder.

  • Method Details

    • setMaxCacheSize

      public void setMaxCacheSize(int aMaxCacheSize)
      Sets the max number of objects that will be stored using hard references. More objects will be stored using soft references.
      Parameters:
      aMaxCacheSize - the max number of objects cached with hard references.

    • getMaxCacheSize

      public int getMaxCacheSize()
      returns the max number of objects that will be stored using hard references.
      Returns:
      the max number of objects cached with hard references.

    • 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
      Returns:
      the displayable name of this ILcdModelDecoder.

    • canDecodeSource

      public boolean canDecodeSource(String aSourceName)
      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:
      aSourceName - 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:

    • decode

      public ILcdModel decode(String aSourceName) throws IOException
      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);
      }
   }
      See Also: