Problem while closing a geotiff file

Question

I have a method where I open a geotiff file and print its dimensions

 public void parseAndSaveFile(String pathFileToParse) throws IOException, Exception {
 GridCoverage2DReader reader = null;
 GridCoverage2D image = null;
 BufferedImage img = null;
 try {
 File f = new File(pathFileToParse);
 ParameterValue<OverviewPolicy> policy = AbstractGridFormat.OVERVIEW_POLICY.createValue();
 policy.setValue(OverviewPolicy.IGNORE);
 // this will basically read 4 tiles worth of data at once from the disk...
 ParameterValue<String> gridsize = AbstractGridFormat.SUGGESTED_TILE_SIZE.createValue();
 //gridsize.setValue(512 * 4 + "," + 512);
 // Setting read type: use JAI ImageRead (true) or ImageReaders read methods (false)
 ParameterValue<Boolean> useJaiRead = AbstractGridFormat.USE_JAI_IMAGEREAD.createValue();
 useJaiRead.setValue(true);
 reader = new GeoTiffReader(f); 
 //reader.read(new GeneralParameterValue[] { policy, gridsize, useJaiRead });
 image = reader.read(new GeneralParameterValue[]{policy, gridsize, useJaiRead});
 //Rectangle2D bounds2D = image.getEnvelope2D().getBounds2D();
 // calculate zoom level for the image
 GridGeometry2D geometry = image.getGridGeometry();
 img = ImageIO.read(f);
 //WritableRaster raster = img.getRaster();
 //int numBands = raster.getNumBands();
 int width = img.getWidth();
 int height = img.getHeight();
 logger.info("Width: {}, Height: {}", width, height);
 } catch (Exception e) {
 e.printStackTrace();
 } finally {
 reader.dispose();
 image.dispose(true);
 }
 }

In the calling method, I try to delete the file

Files.deleteIfExists(Paths.get(pathFileToParse));

but I get the error:

Unable to access the file. The file is used by another process.

Because? Did I correctly release the geotiff file?

• Ian Turton: Try to see which other process is using the file - stackoverflow.com/questions/3565218/…
• Alessio Frabotta: I saw the post and installed the "Handle" utility. The only process which use the file is javaw.exe

Answer 1

That code works perfectly for me on Linux, so unless you are doing something odd in the rest of the program it is a windows issue.

I added this main method:

public static void main(String[] args) throws IOException, Exception {
 ParseAndDelete me = new ParseAndDelete();
 String pathFileToParse = "test3.tif";
 me.parseAndSaveFile(pathFileToParse);
 Files.deleteIfExists(Paths.get(pathFileToParse));
 }

Does that work for you?

• Alessio Frabotta: I don't know to explain why it doesn't work for me
• Alessio Frabotta: even the changes you proposed to me do not work
• Ian Turton: so a program of just that main and your method fails on windows? It may be a bug but afaik none of the GeoTools devs uses windows so it is unlikely to get fixed.
• Alessio Frabotta: the process that blocks the file is javaw.exe
• Alessio Frabotta: I solved with these instructions: FileInputStream tiffFile = new FileInputStream(pathFileToParse); ImageInputStream iis = ImageIO.createImageInputStream(tiffFile); BufferedImage img = ImageIO.read(iis); Just close the FileInputStream and I no longer have problems deleting the file. If I try to close the ImageInputStream instead I have an error because it is already closed