No need to validate entry is null in ProxyDirContext.

[侯占斌]

hi,all.
       In the ProxyDirContext class, the lookupCache method is described
below:

       public CacheEntry lookupCache(String name) {
        CacheEntry entry = cacheLookup(name);
        if (entry == null) {
the line 1378 in ProxyDirContext
            entry = new CacheEntry();
            entry.name = name;
            try {
………………

       I think there is no need to validate whether the entry is null, the
call for the cacheLookup method could return entry which is not null.


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