Script Uninstall of Java

I am trying to uninstall Java via a Powershell script. It works great, but the script removes all java builds. This includes Symantec NetBackup, JReports, and anything that has an embedded version of Java. Is there any way I could change this script to uninstall just Oracle Java installations?

$java = Get-WmiObject -Class win32_product | where { $_.Name -like "*Java*"}
$msiexec = "C:\Windows\system32\msiexec.exe";
$msiexecargs = '/x "$($app.IdentifyingNumber)" /qn /norestart'

if ($java -ne $null)
{
    foreach ($app in $java)
    {
        write-host $app.LocalPackage
        write-host $app.IdentifyingNumber
        &C:\Windows\system32\cmd.exe /c "C:\Windows\system32\msiexec.exe /x $($app.IdentifyingNumber) /qn"
        Start-Process -FilePath $msiexec -Arg $msiexecargs -Wait -Passthru
        [Diagnostics.Process]::Start($msiexec, $msiexecargs);
    }
}
if ($java -ne $null)
{
    foreach ($app in $java)
    {
        write-host $app.LocalPackage
        write-host $app.IdentifyingNumber
        &C:\Windows\system32\cmd.exe /c "C:\Windows\system32\msiexec.exe /x $($app.IdentifyingNumber) /qn"
        Start-Process -FilePath $msiexec -Arg $msiexecargs -Wait -Passthru
        [Diagnostics.Process]::Start($msiexec, $msiexecargs);
    }
}
else { exit }