PREUN

/bin/sh

{
  [ $1 -eq 0 ] || exit 0
  /usr/sbin/update-alternatives --remove jaxp_transform_impl /usr/share/java/saxon.jar
} >/dev/null 2>&1 || :

POSTIN

/bin/sh

/usr/sbin/update-alternatives --install /usr/share/java/jaxp_transform_impl.jar \
  jaxp_transform_impl /usr/share/java/saxon.jar 25