/**
* Gathers all declared variables.
*
* @param gs grouping specs
* @param vs non-grouping variables
* @return declared variables
*/
private static Var[] vars(final Spec[] gs, final Var[] vs) {
final int gl = gs.length, vl = vs.length;
final Var[] res = new Var[gl + vl];
for (int g = 0; g < gl; g++) res[g] = gs[g].var;
System.arraycopy(vs, 0, res, gl, vl);
return res;
}
/**
* Constructor.
*
* @param specs grouping specs
* @param pre references to pre-grouping variables
* @param post post-grouping variables
* @param info input info
*/
public GroupBy(final Spec[] specs, final VarRef[] pre, final Var[] post, final InputInfo info) {
super(info, vars(specs, post));
this.specs = specs;
this.post = post;
preExpr = new Expr[pre.length];
System.arraycopy(pre, 0, preExpr, 0, pre.length);
int n = 0;
for (final Spec spec : specs) if (!spec.occluded) n++;
nonOcc = n;
}
/**
* Returns the date in seconds.
*
* @return seconds
*/
final BigDecimal seconds() {
int z = tz;
if (z == Short.MAX_VALUE) {
// [CG] XQuery, DateTime: may be removed
final long n = System.currentTimeMillis();
z = Calendar.getInstance().getTimeZone().getOffset(n) / 60000;
}
return (sec == null ? BigDecimal.ZERO : sec)
.add(BigDecimal.valueOf(Math.max(0, hou) * 3600 + Math.max(0, min) * 60 - z * 60));
}
/**
* Copies the children array. This is faster than {@code kids.clone()} according to <a
* href="http://www.javaspecialists.eu/archive/Issue124.html">Heinz M. Kabutz</a>.
*
* @return copy of the child array
*/
TrieNode[] copyKids() {
final TrieNode[] copy = new TrieNode[KIDS];
System.arraycopy(kids, 0, copy, 0, KIDS);
return copy;
}