public function &cache($value = null, &$result = null)
{
if (!isset($this->cache)) {
$this->cache = new ModelCacheStorage();
}
$num_args = func_num_args();
if ($num_args == 1) {
//store the cache
if (is_array($value)) {
foreach ($value as $v) {
if (!is::model($v)) {
trigger_error('Array must contain only models');
}
}
} elseif (!is::model($value)) {
trigger_error(sprintf('Argument 1 must be an %s of %s "model"', is_object($value) ? 'instance' : 'object', is_object($value) ? '' : 'class '), E_USER_ERROR);
}
$keys = $this->cache_keys();
if (count($keys) > 0) {
$avalue = is_array($value) ? $value : array($value);
foreach ($avalue as $v) {
foreach ($keys as $key) {
if (is_array($key)) {
//compound key
$ck = new StdClass();
foreach ($key as $k) {
if (!isset($v->{$k})) {
throw new Exception(sprintf('Property %s does not exist.', $k));
}
$ck->{$k} = $v->{$k};
}
$this->cache->attach($ck, $v);
} else {
if (!isset($v->{$key})) {
throw new Exception(sprintf('Property %s does not exist.', $key));
}
$ck = new StdClass();
$ck->{$key} = $v->{$key};
$this->cache->attach($ck, $v);
}
}
}
} else {
trigger_error('Unable to cache model, cache_keys() does not containing any keys to index.', E_USER_ERROR);
}
return $value;
} elseif ($num_args == 2) {
//get the cache
if (!is_array($value)) {
trigger_error('Argument 1 must be an array', E_USER_ERROR);
}
$ck = new StdClass();
foreach ($value as $k => $v) {
$ck->{$k} = $v;
}
$result = false;
if ($this->cache->offsetExists($ck)) {
$result = $this->cache[$ck];
$r = true;
return $r;
}
return $result;
} else {
trigger_error(sprintf('Incorrect number of arguments received. Expected 1 or 2, got %s.', $num_args));
}
}
