Fix Android 2.2 compatibility

[goncalossilva]

Same as #124, but for the 2.3 branch.

[cowtowncoder]

Sounds good, will merge soon. Thank you again for the patch!

One formality we need for substantial changes is a Contributor License Agreement, one page document that just states that you wrote the code in question, and that we can distribute it. Empty doc is found from jackson repo:

https://github.com/FasterXML/jackson/blob/master/contributor-agreement.pdf

and typically most contributors just fill in personal part; company part is optional and may be filled if it's part of daytime work and company wants credit for it. Printing copy, scanning signed version works; some have just used an image package to add printed name. All work fine.

So, if you could fill this and email to "info" at "fasterxml.com", that would be perfect. Let me know if you have questions (can email "tatu" at fasterxml.com) regarding CLA.

Apologies for the hassle, but this is one-time thing, so once it is done we can accept any and all contributions for Jackson projects.

[barbeau]

@goncalossilva Thanks for contributing this to Jackson! Quick note on licensing - from a quick scan, I believe this code is mostly copy/paste from the Android Open-Source Project (AOSP)?

https://android.googlesource.com/platform/libcore/+/android-4.4.1_r1/luni/src/main/java/java/util/Arrays.java

If so, the code should carry the same Apache 2.0 license header as indicated at the top of the above link. @cowtowncoder would also need to make sure that Apache 2.0 is compatible with the Jackson license.

[goncalossilva]

@barbeau This code was extracted from an array utility class I carry around (by me, AOSP, Apache, etc). Answering your question: yes, I just checked and this part in particular is all from the AOSP Arrays.java source. If @cowtowncoder determines the license is compatible with Jackson's, then all that's needed is to add the header. Thanks for the heads up!