Package com.logicaldoc.enterprise.storer

Class StorerEncryption

java.lang.Object

com.logicaldoc.enterprise.storer.StorerEncryption

public class StorerEncryption
extends Object

Utility methods useful for those Storers that supports the encryption

Since:

7.7.1

Author:

Marco Meschieri - LogicalDOC

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ENCRYPTED_EXT

Method Summary

Modifier and Type	Method	Description
static InputStream	getStream(File file, String resource, boolean useAutoDelete)	Retrieves the stream of a resource inside a zip file.
static long	getUncompressedSize(File file, String resource)	Retrieves the real size of a resource inside a zip
static long	writeZip(File src, String resource, File dest, int compressionLevel)	Writes a resource into a zip file
static long	writeZip(InputStream stream, String resource, File dest, int compressionLevel)	Writes the stream of a resource into a zip file

Methods inherited from class java.lang.Object

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

Field Details

ENCRYPTED_EXT

public static final String ENCRYPTED_EXT

See Also:

• Constant Field Values

Method Details

getStream

public static InputStream getStream(File file,
 String resource,
 boolean useAutoDelete)
                             throws com.logicaldoc.util.crypt.CryptUtil.EncryptionException,
IOException

Retrieves the stream of a resource inside a zip file.

Parameters:

file - The zip file

resource - Name of the resource

useAutoDelete - true to return a stream that deletes the file once completely read

Returns:

The stream

Throws:

com.logicaldoc.util.crypt.CryptUtil.EncryptionException - the file is encrypted

IOException - I/O error

getUncompressedSize

public static long getUncompressedSize(File file,
 String resource)
                                throws IOException,
com.logicaldoc.util.crypt.CryptUtil.EncryptionException

Retrieves the real size of a resource inside a zip

Parameters:

file - The zip file

resource - The name of the resource

Returns:

The uncompressed size expressed in bytes

Throws:

IOException - Error accessing the file

com.logicaldoc.util.crypt.CryptUtil.EncryptionException - Error in the decryption

writeZip

public static long writeZip(InputStream stream,
 String resource,
 File dest,
 int compressionLevel)
                     throws IOException

Writes the stream of a resource into a zip file

Parameters:

stream - The input stream (it will be closed at the end)

resource - The name of the resource inside the zip

dest - The destination file

compressionLevel - level of compression (between 0 and 9)

Returns:

the uncompressed size of the resource

Throws:

IOException - I/O error reading the stream

writeZip

public static long writeZip(File src,
 String resource,
 File dest,
 int compressionLevel)
                     throws IOException

Writes a resource into a zip file

Parameters:

src - The input file

resource - The name of the resource inside the zip

dest - The destination file

compressionLevel - level of compression (between 0 and 9)

Returns:

the uncompressed size of the resource

Throws:

IOException - error reading the source or writing the destination