protected function finishImpl(array &$records = NULL) {
parent::finishImpl($records);
if (!isset($records)) {
return;
}
$valueMin = $valueMax = NULL;
// preparing minimum and maximum values
foreach ($records as $record) {
if (!isset($record[$this->valueColumnName])) {
continue;
}
$value = $record[$this->valueColumnName];
$valueMin = MathHelper::min($valueMin, $value);
$valueMax = MathHelper::max($value, $valueMax);
}
$valueRange = $valueMax - $valueMin;
// generating weighted grade
foreach ($records as &$record) {
if (!isset($record[$this->valueColumnName])) {
continue;
}
$value = $record[$this->valueColumnName];
$rank = ($valueRange == 0) ? 1 : ($value - $valueMin) / $valueRange;
$record[$this->memberRankColumnName] = $rank;
}
unset($record);
}
public function postFormatRecords(array &$records = NULL)
{
parent::postFormatRecords($records);
if (!isset($records)) {
return;
}
$valueMin = NULL;
$valueMax = NULL;
// preparing minimum and maximum values
foreach ($records as $record) {
if (!isset($record[$this->valuePropertyName])) {
continue;
}
$value = $record[$this->valuePropertyName];
$valueMin = MathHelper::min($valueMin, $value);
$valueMax = MathHelper::max($value, $valueMax);
}
// generating weighted grade
foreach ($records as &$record) {
if (!isset($record[$this->valuePropertyName])) {
continue;
}
$value = $record[$this->valuePropertyName];
$weightedGrade = ($value - $valueMin) / ($valueMax - $valueMin);
$record[$this->weightedGradeProperyName] = $weightedGrade;
}
}
protected function calculateLinkWeight(ReferenceLink $link, $weightMultiplier, ReferenceLink $parentLink = NULL) {
if (isset($parentLink)) {
$weight = NULL;
foreach ($link->columnNames as $referencePointColumnIndex => $columnName) {
$column = $link->dataset->getColumn($columnName);
$parentColumnName = $link->parentColumnNames[$referencePointColumnIndex];
$parentColumn = $parentLink->dataset->getColumn($parentColumnName);
// calculating the link weight
$columnWeight = $parentColumn->isKey()
? ($column->isKey() ? self::$LINK_WEIGHT__PK_to_PK : self::$LINK_WEIGHT__from_LOOKUP)
: ($column->isKey() ? self::$LINK_WEIGHT__to_LOOKUP : self::$LINK_WEIGHT__NON_PK_to_NON_PK);
$weight = MathHelper::min($weight, $columnWeight);
}
// calculating the link weight and adjusting the valued based on multiplier
$link->weight = $weight / pow($weightMultiplier, count($link->columnNames) - 1);
}
if (isset($link->nestedLinks)) {
foreach ($link->nestedLinks as $nestedLink) {
$this->calculateLinkWeight($nestedLink, $weightMultiplier, $link);
}
}
}
public function readLineFromResource() {
$this->incrementLineNumber();
$delimiterSize = 1;
$i = 0;
$n = strpos($this->buffer, "\n", $this->index);
$r = strpos($this->buffer, "\r", $this->index);
if ($n === FALSE) {
if ($r === FALSE) {
// last line in the stream
if (($this->index + 1) < $this->bufferSize) {
$s = substr($this->buffer, $this->index);
$this->index = $this->bufferSize;
return $s;
}
else {
return FALSE;
}
}
else {
// continue with just $r
$i = $r;
}
}
else {
if ($r === FALSE) {
// continue with just $n
$i = $n;
}
else {
// both delimiters are set
if (($r + 1) == $n) {
// it is one delimiter \r\n
$delimiterSize = 2;
$i = $r;
}
else {
$i = MathHelper::min($r, $n);
}
}
}
$line = ($i == $this->index)
? ''
: substr($this->buffer, $this->index, $i - $this->index);
$this->index = $i + $delimiterSize;
return $line;
}
