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https://issues.apache.org/jira/browse/LANG-341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Henri Yandell updated LANG-341:
-------------------------------
Fix Version/s: (was: 3.0)
3.1
Moving to 3.1. I think the path to finishing the code by adding more tests, and
implementations for bytes, shorts, ints, floats and doubles is easy enough, but
it won't affect backwards compatibility so not a blocker for 3.0.
> [NumberUtils] Please add number <> byte[] methods
> -------------------------------------------------
>
> Key: LANG-341
> URL: https://issues.apache.org/jira/browse/LANG-341
> Project: Commons Lang
> Issue Type: New Feature
> Components: lang.math.*
> Reporter: Lilianne E. Blaze
> Fix For: 3.1
>
> Attachments: 341-v1-src.patch, 341-v1-test.patch, LANG-341.patch
>
>
> Hello,
> I need a set of methods to convert Long to or from a byte[] array, as if
> writing / reading from Data(Input/Output)Stream(
> ByteArray(Input/Output)Stream ).
> First, doing it with Streams seems a bit wasteful, second, it seems a
> pretty general use. Would it be possible to add something like that to,
> for example,
> org.apache.commons.lang.math.NumberUtils?
> Example code:
> static public long toLong(byte[] b)
> {
> return toLong(b, 0);
> }
>
> static public long toLong(byte[] b, int offset)
> {
> return (((long)b[offset] << 56) +
> ((long)(b[offset + 1] & 255) << 48) +
> ((long)(b[offset + 2] & 255) << 40) +
> ((long)(b[offset + 3] & 255) << 32) +
> ((long)(b[offset + 4] & 255) << 24) +
> ((b[offset + 5] & 255) << 16) +
> ((b[offset + 6] & 255) << 8) +
> ((b[offset + 7] & 255) << 0));
> }
>
> static public byte[] longToByteArray(long l)
> {
> byte b[] = new byte[8];
> longToByteArray(l, b, 0);
> return b;
> }
>
> static public void longToByteArray(long l, byte b[], int offset)
> {
> b[offset] = (byte)(l >>> 56);
> b[offset + 1] = (byte)(l >>> 48);
> b[offset + 2] = (byte)(l >>> 40);
> b[offset + 3] = (byte)(l >>> 32);
> b[offset + 4] = (byte)(l >>> 24);
> b[offset + 5] = (byte)(l >>> 16);
> b[offset + 6] = (byte)(l >>> 8);
> b[offset + 7] = (byte)(l >>> 0);
> }
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