...
The
...
Empty
...
Condition
...
The
...
Empty
...
Condition
...
can
...
be
...
used
...
to
...
check
...
whether
...
an
...
object
...
given
...
by
...
a
...
nested
...
parameter
...
is
...
empty.
...
Objects
...
can
...
be
...
plain
...
strings,
...
variables,
...
files
...
or
...
directories.
...
Example:
| Code Block |
|---|
<condition type="empty" id="isEmptyImportDir"> <dir>${INSTALL_PATH}/import</dir> </condition> |
The
...
Empty
...
condition
...
has
...
been
...
introduced
...
in
...
IzPack
...
5.0.
...
Nested
...
Elements
...
The
...
nested
...
elements
...
of
...
the
...
Empty
...
condition
...
don't
...
have
...
any
...
further
...
attributes,
...
but
...
receive
...
contents
...
in
...
the
...
text
...
embedded.
...
IzPack
...
variables
...
are
...
dynamically
...
resolved
...
for
...
each
...
value.
...
string
Used when a string is to be checked whether it is empty.
variable
The variable name when a variable value is to be checked whether it is empty.
This is not the same as checking if a variable exists, which can be checked by the Exists condition.
file
The file name when the contents of a file are to be checked to be empty.
This is not the same as checking if a file exists, which can be checked by the Exists condition.
dir
The directory name when a directory has to be checked to contain no files.
This is not the same as checking if a directory exists, which can be checked by the Exists condition.