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<?php
/*
missing - maximal empty interval (without data). It's precise up to existing
caching levels and should be used only to make decision if there anything
missing in the data or not. No support for subresolution data.
*/
class DATA {
var $min, $max, $mean;
var $items, $n, $missing;
var $missing_counter;
var $resolution;
function __construct($items) {
$this->min = array(); $this->max = array();
$this->mean = array();
$this->n = 0;
$this->missing = 0;
$this->items = $items;
$this->missing_counter = 0;
}
function Push(DATA &$v, $width) {
if (!$v->n) {
$this->missing_counter += $width;
return;
}
$items = $v->items;
if ($items != $this->items)
throw new ADEIException(translate("Number of items in the group have changed from %u to %u (Data::Push)", $this->items, $items));
if ($this->n) {
for ($i = 0; $i < $items; $i++) {
if (($v->min[$i] !== NULL)&&(($v->min[$i] < $this->min[$i])||($this->min[$i] === NULL))) $this->min[$i] = $v->min[$i];
if (($v->max[$i] !== NULL)&&(($v->max[$i] > $this->max[$i])||($this->max[$i] === NULL))) $this->max[$i] = $v->max[$i];
if (($v->mean[$i] !== NULL)&&($this->mean[$i] !== NULL)) $this->mean[$i] = ($this->mean[$i] * $this->n + $v->mean[$i] * $v->n) / ($this->n + $v->n);
else $this->mean[$i] = NULL;
}
if ($this->missing_counter) {
if ($this->missing_counter > $this->missing) $this->missing = $this->missing_counter;
$this->missing_counter = 0;
} else if ($v->missing > $this->missing) $this->missing = $v->missing;
} else {
for ($i=0; $i < $items; $i++) {
$this->min[$i] = $v->min[$i];
$this->max[$i] = $v->max[$i];
$this->mean[$i] = $v->mean[$i];
}
if ($this->missing_counter) {
$this->missing = $this->missing_counter;
$this->missing_counter = 0;
} else $this->missing = $v->missing;
}
$this->n += $v->n;
}
// Row from CACHE table (non 0)
function PushRow(&$v, $width) {
$n = $v[1];
if (!$n) {
$this->missing_counter += $width;
return;
}
$missing = $v[2];
$items = (count($v) - 3) / 3;
if ($items != $this->items)
throw new ADEIException(translate("Number of items in the group have changed from %u to %u (Data::PushRow)", $this->items, $items));
if ($this->n) {
for ($i = 0, $j = 2; $i < $items; $i++) {
if (($v[++$j] !== NULL)&&(($v[$j] < $this->min[$i])||($this->min[$i] === NULL))) $this->min[$i] = $v[$j];
if (($v[++$j] !== NULL)&&(($v[$j] > $this->max[$i])||($this->max[$i] === NULL))) $this->max[$i] = $v[$j];
if (($v[++$j] !== NULL)&&($this->mean[$i] !== NULL)) $this->mean[$i] = ($this->mean[$i] * $this->n + $n * $v[$j]) / ($this->n + $n);
else $this->mean[$i] = NULL;
}
if ($this->missing_counter) {
if ($this->missing_counter > $this->missing) $this->missing = $this->missing_counter;
$this->missing_counter = 0;
} elseif ($missing > $this->missing) $this->missing = $missing;
} else {
for ($i=0, $j = 2; $i < $items; $i++) {
$this->min[$i] = $v[++$j];
$this->max[$i] = $v[++$j];
$this->mean[$i] = $v[++$j];
}
if ($this->missing_counter) {
$this->missing = $this->missing_counter;
$this->missing_counter = 0;
} else $this->missing = $missing;
}
$this->n += $n;
}
// READER->GetData
function PushValue(&$v, $gap) {
$items = count($v);
if (!$items) return;
if ($items != $this->items)
throw new ADEIException(translate("Number of items in the group have changed from %u to %u (Data::PushValue)", $this->items, $items));
if ($this->n) {
for ($i = 0; $i < $items; $i++) {
if ($v[$i] !== NULL) {
if (($v[$i] < $this->min[$i])||($this->min[$i] === NULL)) $this->min[$i] = $v[$i];
if (($v[$i] > $this->max[$i])||($this->max[$i] === NULL)) $this->max[$i] = $v[$i];
if ($this->mean[$i] !== NULL) $this->mean[$i] = ($this->mean[$i] * $this->n + $v[$i]) / ($this->n + 1);
} else {
$this->mean[$i] = NULL;
}
}
} else {
for ($i=0; $i < $items; $i++) {
$this->min[$i] = $v[$i];
$this->max[$i] = $v[$i];
$this->mean[$i] = $v[$i];
}
}
if ($gap > $this->missing) $this->missing = $gap;
$this->n++;
}
function Finalize($gap = 0) {
if ($gap > $this->missing) $this->missing = $gap;
if (is_float($this->missing)) $this->missing = floor($this->missing);
if ($this->missing_counter > $this->missing) $this->missing = $this->missing_counter;
}
}
?>
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