/**
* Clean up any resources. Closes the channel.
*
* @throws IOException If errors occur while closing the channel.
*/
public void close() throws IOException {
// don't throw NPE on double close
if (channel == null) return;
try {
if (channel.isOpen()) {
channel.close();
streamLogger.close();
}
NIOUtilities.clean(buffer, useMemoryMappedBuffer);
} finally {
if (shxReader != null) shxReader.close();
}
shxReader = null;
channel = null;
header = null;
}
/**
* Creates a new instance of ShapeFile.
*
* @param shapefileFiles The ReadableByteChannel this reader will use.
* @param strict True to make the header parsing throw Exceptions if the version or magic number
* are incorrect.
* @throws IOException If problems arise.
* @throws ShapefileException If for some reason the file contains invalid records.
*/
public ShapefileReader(
ShpFiles shapefileFiles, boolean strict, boolean useMemoryMapped, GeometryFactory gf)
throws IOException, ShapefileException {
this.channel = shapefileFiles.getReadChannel(ShpFileType.SHP, this);
this.useMemoryMappedBuffer = useMemoryMapped;
streamLogger.open();
randomAccessEnabled = channel instanceof FileChannel;
try {
shxReader = new IndexFile(shapefileFiles, this.useMemoryMappedBuffer);
} catch (Exception e) {
LOGGER.log(
Level.WARNING,
"Could not open the .shx file, continuing " + "assuming the .shp file is not sparse",
e);
currentShape = UNKNOWN;
}
init(strict, gf);
}