WKBRasterImageReader.Spi Class Reference

Inheritance diagram for WKBRasterImageReader.Spi:

Collaboration diagram for WKBRasterImageReader.Spi:

Public Member Functions
	Spi ()
ImageReader	createReaderInstance (final Object extension) throws IOException
boolean	canDecodeInput (Object source) throws IOException
String	getDescription (Locale locale)

Constructor & Destructor Documentation

Spi()

Spi

(

)

                     {
            super();
            names           = new String[] {"PostGISWKBraster"};
            MIMETypes       = new String[] {"image/x-pgraster"};
            pluginClassName = "org.geotoolkit.coverage.wkb.WKBRasterImageReader";
            vendorName      = "Geotoolkit.org";
            version         = "";//Utilities.VERSION.toString();
            writerSpiNames  = new String[] {"PostGISWKBraster"};
            inputTypes      = new Class[0];
            inputTypes      = ArraysExt.append(inputTypes, ImageInputStream.class);
            inputTypes      = ArraysExt.append(inputTypes, File.class);
            inputTypes      = ArraysExt.append(inputTypes, URL.class);
            inputTypes      = ArraysExt.append(inputTypes, URI.class);
            inputTypes      = ArraysExt.append(inputTypes, Path.class);
            inputTypes      = ArraysExt.append(inputTypes, byte[].class);
            suffixes        = new String[0];
            suffixes        = ArraysExt.append(suffixes, "wkb");
        }

Member Function Documentation

canDecodeInput()

boolean canDecodeInput

(

Object

source

)

throws IOException

                                                                        {
 
            if (source instanceof ImageInputStream) {
                final ImageInputStream is = (ImageInputStream) source;
                is.mark();
                source = new byte[5];
                is.readFully((byte[])source);
                is.reset();
            }
 
            if (source instanceof byte[]) {
                byte[] buffer = (byte[]) source;
                //check endianess and version
                boolean valid = (buffer[0] == 0 || buffer[0] == 1)
                        && buffer[1] == 0
                        && buffer[2] == 0;
                //additional check, many files start with several 0x00, band check reduces the risk
                //number of bands, should be between 1 and 8
                valid &= (buffer[4] >0 && buffer[4] < 8);
                return valid;
            }
 
            return false;
        }

createReaderInstance()

ImageReader createReaderInstance

(

final Object

extension

)

throws IOException

                                                                                           {
            return new WKBRasterImageReader(this);
        }

References WKBRasterImageReader.WKBRasterImageReader().

getDescription()

String getDescription

(

Locale

locale

)

                                                    {
            return "Postgis WKB Raster reader.";
        }