Computes a 'hashvalue' for the content of file using String.hashValue().
Use of this algorithm doesn't require any additional nested s and
doesn't support any.
version: 2003-09-13 since: Ant 1.6
Computes a 'hashvalue' for a file content.
It reads the content of a file, convert that to String and use the
String.hashCode() method.
Parameters: file - The file for which the value should be computed the hashvalue or null if the file couldn't be read