osx mac jdk7 as highest priority

jdk7-force-default-everyone.sh

#!/bin/sh
set -e
#
# set oracle jdk7 as the highest-priority default java for all users and
# all future users on this machine.
#
# fuck you oracle for not releasing proper tools for deployment manageability
#
# License:  This  program  is  free  software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as published by
# the  Free Software Foundation; either version 3 of the License, or (at your
# option)  any later version. This program is distributed in the hope that it
# will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
 

die() {
    echo "$@" >&2
    exit 1
}

uname | grep -q '^Darwin$' || die "$0 must run on OSX."

UUID=`/usr/sbin/system_profiler SPHardwareDataType | /usr/bin/awk '/UUID/{print$3}'`

JDK6_FULL_VERSION=`/usr/libexec/java_home --version 1.6 --exec java -version 2>&1 | /usr/bin/awk '/Runtime/{print$6}' | /usr/bin/cut -d- -f 1-3`
if [ -n "$JDK6_FULL_VERSION" ]; then
  JDK6_JVM_BUNDLE_ID=`/usr/libexec/java_home --version 1.6 -xml | /usr/bin/grep -o '[a-z0-9.]*java[a-z0-9.]*' | /usr/bin/uniq`
  [ -z "$JDK6_JVM_BUNDLE_ID" ] && die "Could not locate the JDK6 bundleid" 
  JDK6_HOME="`/usr/libexec/java_home --version 1.6`"
  [ -z "$JDK6_HOME" ] && die "Could not locate the JDK6 home" 
fi

JDK7_FULL_VERSION=`/usr/libexec/java_home --version 1.7 --exec java -version 2>&1 | /usr/bin/grep java | /usr/bin/cut -d'"' -f2`
if [ -n "$JDK7_FULL_VERSION" ]; then
  JDK7_JVM_BUNDLE_ID=`/usr/libexec/java_home --version 1.7 -xml | /usr/bin/grep -o '[a-z0-9.]*java[a-z0-9.]*' | /usr/bin/uniq`
  [ -z "$JDK7_JVM_BUNDLE_ID" ] && die "Could not locate the JDK7 bundleid" 
  JDK7_HOME="`/usr/libexec/java_home --version 1.7`"
  [ -z "$JDK7_HOME" ] && die "Could not locate the JDK7 home" 
fi

setvm() {

    base="$1"
    plist="$base/Library/Preferences/ByHost/com.apple.java.JavaPreferences.$UUID.plist"
    dir="`dirname \"$plist\"`"
    /usr/bin/sudo mkdir -p "$dir"
    user="`/usr/bin/sudo stat -s "$dir" | /usr/bin/sed 's/.*st_uid=\([0-9][0-9]*\) .*/\1/'`"
    group="`/usr/bin/sudo stat -s "$dir" | /usr/bin/sed 's/.*st_gid=\([0-9][0-9]*\) .*/\1/'`"

    if /usr/bin/sudo /usr/libexec/PlistBuddy -c 'Print :PreferredJVMOrder:Any:0:JVMVendor' "$plist" 2>/dev/null | /usr/bin/grep -q '^Oracle Corporation$' && \
       /usr/bin/sudo /usr/libexec/PlistBuddy -c 'Print :PreferredJVMOrder:Any:0:JVMPlatformVersion' "$plist" 2>/dev/null | /usr/bin/grep -q '^1.7$'
    then
      echo " JVM is already set to JDK7" >&2
      return 0
    fi

    if /usr/bin/sudo /usr/libexec/PlistBuddy -c 'Print :PreferredJVMOrder:Any' "$plist" >/dev/null 2>&1
    then
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Delete :PreferredJVMOrder:Any" "$plist" 
    fi

    # changing JDK from default
    JVM = 0

    /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder Dict" "$plist" 2>/dev/null || true
    /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any array" "$plist"

    if [ -d "$JDK7_HOME" ]; then
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM Dict" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMArch string x86_64" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMVersion string $JDK7_FULL_VERSION" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMPlatformVersion string 1.7" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMBundleID string $JDK7_JVM_BUNDLE_ID" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMVendor string 'Oracle Corporation'" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMHomePath string '$JDK7_HOME'" "$plist"
      $JVM = $[$JVM + 1]
    fi

    if [ -d "$JDK6_HOME" ]; then
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM Dict" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMArch string x86_64" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMVersion string $JDK6_FULL_VERSION" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMPlatformVersion string 1.6" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMBundleID string $JDK6_JVM_BUNDLE_ID" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMVendor string 'Apple Inc.'" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMHomePath string '$JDK6_HOME'" "$plist"
      $JVM = $[$JVM + 1]

      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM Dict" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMArch string i386" "$plist"  
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMVersion string $JDK6_FULL_VERSION" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMPlatformVersion string 1.6" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMBundleID string $JDK6_JVM_BUNDLE_ID" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMVendor string 'Apple Inc.'" "$plist"
      /usr/bin/sudo /usr/libexec/PlistBuddy -c "Add :PreferredJVMOrder:Any:$JVM:JVMHomePath string '$JDK6_HOME'" "$plist"
      $JVM = $[$JVM + 1]
    fi

    /usr/bin/sudo /usr/bin/plutil -convert binary1 "$plist" 
    /usr/bin/sudo /usr/sbin/chown -R $user:$group "$dir"
    echo "Done"
}

# for each user, try to change their preferences
/usr/bin/dscl . list /Users UniqueID | /usr/bin/awk '{if($2>500){print$1}}' | while read -r username
do
  printf "Setting JDK7 as highest-priority for existing user $username : " >&2
  homedir="`/usr/bin/dscl . read /Users/$username NFSHomeDirectory | /usr/bin/cut -d' ' -f2-`"
  setvm "$homedir"
done

# also change the default preferences
/usr/bin/sudo /usr/bin/find '/System/Library/User Template' -type d -name '*.lproj' -depth 1 | while read -r language
do
  printf "Setting JDK7 as highest-priority for new users, language $language : " >&2
  setvm "$language" 
done

Tested, it does the same as the control panel.

Works with 10.7.0+, 10.8.0+.