ArrayFactory SAM type (original) (raw)

Raab, Donald Donald.Raab at gs.com
Thu Nov 8 08:46:10 PST 2012

I was thinking about this. If the methods returns Object, could we not just have an if-statement check if it was one of the primitive types and return a new int[] or new double[] in the method if they do instead of making the reflective call?

-----Original Message----- From: Brian Goetz [mailto:brian.goetz at oracle.com] Sent: Thursday, November 08, 2012 11:44 AM To: Raab, Donald [Tech] Cc: lambda-libs-spec-experts at openjdk.java.net Subject: Re: ArrayFactory SAM type / toArray

On 9/19/2012 10:27 PM, Raab, Donald wrote: > Could we add the following methods to the Class class? > > T[] emptyArray() > T[] newArray(int size) I prototyped these, and they work fine for reference types but fall apart for primitive arrays. There is a Class literal for int.class, but we can't make it return an int[] with this method. (This is one reason that Array.newInstance returns Object.) Performance testing would be needed to ensure they are competitive with alternatives.

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