suffix=j2sdk1.7-oracle
j2se_base="/usr/lib/jvm/$suffix"
priority=315

if [ ! -e "$j2se_base/debian/info" ]; then
    exit 0
fi

# alternative <program>
function program_alternative() {
    local program="$1"
    update-alternatives \
	--install "/usr/bin/$program" "$program" \
	"$j2se_base/bin/$program" "$priority" \
	--slave "/usr/share/man/man1/$program.1.gz" "$program.1.gz" \
	"$j2se_base/man/man1/$program.1.gz"
}

# alternative <program> without man page
function program_alternative_no_man() {
    local program="$1"
    update-alternatives \
        --install "/usr/bin/$program" "$program" \
        "$j2se_base/bin/$program" "$priority"
}

# kinit, klist, and ktab not installed at this
# time; handling of /etc/krb5.conf not addressed
# JRE-specific alternatives with JDKs cannot be 
# handled by our current approach
program_alternative appletviewer
program_alternative_no_man ControlPanel
program_alternative extcheck
program_alternative idlj
program_alternative jar
program_alternative jarsigner
program_alternative java
program_alternative javac
program_alternative javadoc
program_alternative javah
program_alternative javap
program_alternative_no_man java-rmi.cgi
program_alternative javaws
program_alternative jconsole
program_alternative jdb
program_alternative jinfo
program_alternative jmap
program_alternative jps
program_alternative jsadebugd
program_alternative jstack
program_alternative jstat
program_alternative jstatd
program_alternative keytool
program_alternative native2ascii
program_alternative orbd
program_alternative pack200
program_alternative policytool
program_alternative rmic
program_alternative rmid
program_alternative rmiregistry
program_alternative serialver
program_alternative servertool
program_alternative tnameserv
program_alternative unpack200

# derive the architecture-specific 
# directory for the plugin
arch_dir="$(dpkg --print-architecture)"

# assemble the plugin path
plugin_dir="$j2se_base/jre/lib/$arch_dir"

# iceweasel
iceweasel_dir="/usr/lib/iceweasel/plugins"
[ -d "$iceweasel_dir" ] || install -d -m 755 "$iceweasel_dir"
update-alternatives \
    --install "$iceweasel_dir/libjavaplugin.so" \
	"iceweasel-javaplugin.so" \
	"$plugin_dir/libnpjp2.so" "$priority"

# chromium
chromium_dir="/usr/lib/chromium/plugins"
[ -d "$chromium_dir" ] || install -d -m 755 "$chromium_dir"
update-alternatives \
    --install "$chromium_dir/libjavaplugin.so" \
	"chromium-javaplugin.so" \
	"$plugin_dir/libnpjp2.so" "$priority"