set apList to {"Finder", "System Events", "com.apple.Finder", "/Applications/Safari"}
set bIDList to retAppBundleID(apList) of me
–> {"com.apple.finder", "com.apple.systemevents", "com.apple.Finder", "com.apple.Safari"}

–Application name list –> Bundle ID list
on retAppBundleID(appNameList)
　　set resList to {}
　　
　　repeat with i in appNameList
　　　　set j to contents of i
　　　　
　　　　if j starts with "/Applications/" then
　　　　　　–POSIX path
　　　　　　if j does not end with ".app" then
　　　　　　　　set j to j & ".app"
　　　　　　end if
　　　　　　set aRes to getBundleIDFromPath(j) of me
　　　　　　
　　　　else if j contains "." then
　　　　　　–Bundle ID (maybe)
　　　　　　copy j to aRes
　　　　else
　　　　　　–Application Name
　　　　　　set aRes to getBundleIDFromAppName(j) of me
　　　　end if
　　　　
　　　　set the end of resList to aRes
　　end repeat
　　
　　return resList
end retAppBundleID

–Application path –> Bundle ID
on getBundleIDFromPath(aPOSIXpath)
　　set aURL to current application’s |NSURL|’s fileURLWithPath:aPOSIXpath
　　set aWorkspace to current application’s NSWorkspace’s sharedWorkspace()
　　set appURL to aWorkspace’s URLForApplicationToOpenURL:aURL
　　set aBundle to current application’s NSBundle’s bundleWithURL:appURL
　　set anID to aBundle’s bundleIdentifier()
　　return anID as string
end getBundleIDFromPath

–Application Name –> path –> Bundle ID
on getBundleIDFromAppName(appName)
　　try
　　　　–Localized Name will require choose application dialog
　　　　set appPath to POSIX path of (path to application appName)
　　on error
　　　　return ""
　　end try
　　return getBundleIDFromPath(appPath) of me
end getBundleIDFromAppName