$existingSite) {
if(!$populationZCTA->containsZCTA($existingSite))
unset($existingSites[$key]);
}
//generate string of comma-separated ZIP codes for the command line
if($existingSites != 'x') {
foreach($existingSites as $existingSite)
$existingSitesString .= $existingSite . ',';
$existingSitesString = rtrim($existingSitesString, ','); //remove trailing ,
} else
$existingSitesString = 'x';
foreach($candidateSites as $candidateSite)
$candidateSitesString .= $candidateSite . ',';
$candidateSitesString = rtrim($candidateSitesString, ','); //remove trailing ,
//the capacity is the total state population divided by the total number of sites we will end up with after the algorithm is run
$capacity = 0;
if($useCapacitatedModel)
$capacity = $populationZCTA->getStatePopulation() / ((count($candidateSites) < $numSites ? count($candidateSites) : $numSites) + ($existingSites == 'x' ? 0 : count($existingSites)));
//now we call the external Java code and parse the text output by throwing the selected sites into an array
$output = shell_exec("java -Xmx512m -jar java/sentinelCalculator.jar data/2010CensusPopulation.db \"$state\" $numSites $radius " . ($useCapacitatedModel == true ? 'true' : 'false') . " $existingSitesString $candidateSitesString $capacity $algorithm");
$output = explode("\n", $output);
//the offset is used to offset the string output from the Java code below
//if we are doing a multi-state calculation, the state population won't be outputted, so there will be 1 less line to read
$offset = $populationZCTA->isMultiState() ? 1 : 0;
if(preg_match('/.+: (.+)/', $output[2 - $offset], $matches))
$existingSitesStats = $matches[1];
else
$_SESSION['error'] = 'Error 1. There was a problem computing the selected sites.
';
if(preg_match('/.+: (.+)/', $output[3 - $offset], $matches))
$selectedSitesStats = $matches[1];
else
$_SESSION['error'] = 'Error 2. There was a problem computing the selected sites.
';
if(preg_match('/.+: (.+)/', $output[4 - $offset], $matches))
$totalStats = $matches[1];
else
$_SESSION['error'] = 'Error 3. There was a problem computing the selected sites.
';
if($numSites > 0) {
if(preg_match_all('/\d{5}/', $output[6 - $offset], $matches)) {
$selectedSites = array();
foreach($matches[0] as $match)
array_push($selectedSites, $match);
} else
$_SESSION['error'] = 'Error 4. There was a problem computing the selected sites.
';
}
$_SESSION['populationZCTA'] = $populationZCTA;
$_SESSION['existingSites'] = $existingSites == 'x' ? array() : $existingSites;
$_SESSION['selectedSites'] = $selectedSites;
$_SESSION['radius'] = $radius;
$_SESSION['existingSitesStats'] = $existingSitesStats;
$_SESSION['selectedSitesStats'] = $selectedSitesStats;
$_SESSION['totalStats'] = $totalStats;
} else
$_SESSION['error'] = $error;
?>