gallery.servlets

Class FileOperations

java.lang.Object

gallery.servlets.FileOperations

public class FileOperations
extends java.lang.Object

Operations on files.

Method Summary

Methods

Modifier and Type	Method and Description
static java.lang.String	computeHash(java.io.File file) Returns a string containing a 512bit hash in hexadecimal of the file.
static void	dumpFile(java.io.InputStream inputStream, javax.servlet.ServletOutputStream outputStream) Reads from inputStream and dumps it to the outputStream.
static void	outputImage(java.io.File file, javax.servlet.ServletOutputStream outputStream, java.lang.String size, ImageAngle angle) Writes an image to the outputStream that has been scaled appropriately and angled.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

dumpFile

public static void dumpFile(java.io.InputStream inputStream,
            javax.servlet.ServletOutputStream outputStream)
                     throws java.io.IOException

Reads from inputStream and dumps it to the outputStream. Does not close input nor outputstream.

Parameters:

inputStream - the input

outputStream - the output

Throws:

java.io.IOException - an error occurred reading/writing to streams

outputImage

public static void outputImage(java.io.File file,
               javax.servlet.ServletOutputStream outputStream,
               java.lang.String size,
               ImageAngle angle)
                        throws java.io.IOException

Writes an image to the outputStream that has been scaled appropriately and angled.

Parameters:

file - original photograph, can only process images of type

• JPEG
• TIFF
• Camera Raw (NEF/CRW/CR2/...)

outputStream - the outputstream to write the image to

size - the size of the image, can be "thumb", "medium" or the default.

Throws:

java.io.IOException - thrown when the file cannot be access in some way.

computeHash

public static java.lang.String computeHash(java.io.File file)
                                    throws java.security.NoSuchAlgorithmException,
                                           java.io.FileNotFoundException,
                                           java.io.IOException

Returns a string containing a 512bit hash in hexadecimal of the file.

Parameters:

file - the file to hash

Returns:

String with hash

Throws:

java.security.NoSuchAlgorithmException - if SHA-512 is not supported (should be, though)

java.io.FileNotFoundException - if file is not found on the filesystem

java.io.IOException - if an error occurred whilst reading the file.