/**
* Decode a message, and return the corresponding object
*
* @param CDicomStreamReader $stream_reader The stream reader
*
* @param integer $control_header The control header
*
* @param string $transfer_syntax The transfer syntax
*
* @return object
*/
static function decodeMessage(CDicomStreamReader $stream_reader, $control_header, $transfer_syntax)
{
if ($control_header == 0 || $control_header == 2) {
$message_class = self::getMessageClass("data");
} else {
$datasets = array();
$dataset = new CDicomDataSet();
$dataset->decode($stream_reader, $transfer_syntax);
$datasets[$dataset->getElementNumber()] = $dataset;
$dataset = new CDicomDataSet();
$dataset->decode($stream_reader, $transfer_syntax);
$datasets[$dataset->getElementNumber()] = $dataset;
$dataset = new CDicomDataSet();
$dataset->decode($stream_reader, $transfer_syntax);
$datasets[$dataset->getElementNumber()] = $dataset;
$stream_reader->rewind();
if (!array_key_exists(0x100, $datasets)) {
return null;
}
$message_class = self::getMessageClass($datasets[0x100]->getValue());
}
$message = new $message_class();
$message->decode($stream_reader, $transfer_syntax);
return $message;
}
/**
* Check if the message is well formed
*
* @return boolean
*/
function isWellFormed()
{
if ($this->command_group_length->getGroupNumber() != 0x0 || $this->command_group_length->getElementNumber() != 0x0) {
return false;
}
if ($this->command_field->getGroupNumber() != 0x0 || $this->command_field->getElementNumber() != 0x100) {
return false;
}
if ($this->message_id_request->getGroupNumber() != 0x0 || $this->message_id_request->getElementNumber() != 0x120) {
return false;
}
if ($this->command_data_set->getGroupNumber() != 0x0 || $this->command_data_set->getElementNumber() != 0x800) {
return false;
}
return true;
}
/**
* Check if the message is well formed
*
* @return boolean
*/
function isWellFormed()
{
if ($this->command_group_length->getGroupNumber() != 0x0 || $this->command_group_length->getElementNumber() != 0x0) {
return false;
}
if ($this->affected_sop_class->getGroupNumber() != 0x0 || $this->affected_sop_class->getElementNumber() != 0x2) {
return false;
}
if ($this->command_field->getGroupNumber() != 0x0 || $this->command_field->getElementNumber() != 0x100) {
return false;
}
if ($this->message_id->getGroupNumber() != 0x0 || $this->message_id->getElementNumber() != 0x110) {
return false;
}
if ($this->command_data_set->getGroupNumber() != 0x0 || $this->command_data_set->getElementNumber() != 0x800) {
return false;
}
return true;
}
/**
* Decode the datas, depending on the transfer syntax
*
* @param CDicomStreamReader $stream_reader The stream writer
*
* @param string $transfer_syntax The UID of the transfer syntax
*
* @return void
*/
function decode(CDicomStreamReader $stream_reader, $transfer_syntax)
{
if (!$transfer_syntax) {
return;
}
$this->attributes = array();
$this->datasets = array();
$stream_length = $stream_reader->getStreamLength();
while ($stream_reader->getPos() < $stream_length) {
$dataset = new CDicomDataSet();
$dataset->decode($stream_reader, $transfer_syntax);
$group = $dataset->getGroupNumber();
$element = $dataset->getElementNumber();
if (!array_key_exists($group, $this->datasets)) {
$this->datasets[$group] = array();
}
if (!array_key_exists($group, $this->attributes)) {
$this->attributes[$group] = array();
}
$this->datasets[$group][$element] = $dataset;
$this->attributes[$group][$element] = $dataset->getValue();
}
}