/**
* @exception IOException
* @exception DicomException
*/
public CEchoRequestCommandMessage() throws DicomException, IOException {
commandField = MessageServiceElementCommand.C_ECHO_RQ;
messageID = super.getNextAvailableMessageID();
int dataSetType = 0x0101; // none
// NB. The Affected SOP Class UID should have no extra trailing padding, otherwise the
// SCP may fail and send an A-ABORT :) (Part 5 says one null (not space) is allowed)
// This is taken care of by the Attribute.write()
AttributeList list = new AttributeList();
{
AttributeTag t = groupLengthTag;
Attribute a = new UnsignedLongAttribute(t);
a.addValue(0);
list.put(t, a);
}
{
AttributeTag t = TagFromName.AffectedSOPClassUID;
Attribute a = new UniqueIdentifierAttribute(t);
a.addValue(SOPClass.Verification);
list.put(t, a);
}
{
AttributeTag t = TagFromName.CommandField;
Attribute a = new UnsignedShortAttribute(t);
a.addValue(commandField);
list.put(t, a);
}
{
AttributeTag t = TagFromName.MessageID;
Attribute a = new UnsignedShortAttribute(t);
a.addValue(messageID);
list.put(t, a);
}
{
AttributeTag t = TagFromName.CommandDataSetType;
Attribute a = new UnsignedShortAttribute(t);
a.addValue(dataSetType);
list.put(t, a);
}
ByteArrayOutputStream bout = new ByteArrayOutputStream();
DicomOutputStream dout =
new DicomOutputStream(
bout, null /* no meta-header */, TransferSyntax.ImplicitVRLittleEndian);
list.write(dout);
bytes = bout.toByteArray();
groupLength = bytes.length - 12;
bytes[8] = (byte) groupLength; // little endian
bytes[9] = (byte) (groupLength >> 8);
bytes[10] = (byte) (groupLength >> 16);
bytes[11] = (byte) (groupLength >> 24);
// System.err.println("CEchoRequestCommandMessage: bytes="+HexDump.dump(bytes));
}
CreateCommand(UnicoreInvokeServer is, String requestId) throws Command.Exception {
super(is);
this.requestId = requestId;
String line;
while ((line = is.readLine()) != null) {
if (line.trim().equals(CMD_CREATE_END)) {
terminated = true;
break;
} else {
try {
StringTokenizer st = new StringTokenizer(line);
String key = st.nextToken();
String value = line.substring(key.length());
list.put(key, value);
} catch (java.lang.Exception e) {
Log.printStackTrace(e);
}
}
}
if (terminated) {
job = new UnicoreJob(this);
} else {
new Command.Exception("the command was not terminated!");
}
}
/**
* @param list
* @param parent
* @exception NumberFormatException
* @exception DicomException
*/
void addAttributesFromNodeToList(AttributeList list, Node parent)
throws NumberFormatException, DicomException {
if (parent != null) {
Node node = parent.getFirstChild();
while (node != null) {
String elementName = node.getNodeName();
NamedNodeMap attributes = node.getAttributes();
if (attributes != null) {
Node vrNode = attributes.getNamedItem("vr");
Node groupNode = attributes.getNamedItem("group");
Node elementNode = attributes.getNamedItem("element");
if (vrNode != null && groupNode != null && elementNode != null) {
String vrString = vrNode.getNodeValue();
String groupString = groupNode.getNodeValue();
String elementString = elementNode.getNodeValue();
if (vrString != null && groupString != null && elementString != null) {
byte[] vr = vrString.getBytes();
int group = Integer.parseInt(groupString, 16);
int element = Integer.parseInt(elementString, 16);
AttributeTag tag = new AttributeTag(group, element);
if ((group % 2 == 0 && element == 0)
|| (group == 0x0008 && element == 0x0001)
|| (group == 0xfffc && element == 0xfffc)) {
// System.err.println("ignoring group length or length to end or dataset trailing
// padding "+tag);
} else {
if (vrString.equals("SQ")) {
SequenceAttribute a = new SequenceAttribute(tag);
// System.err.println("Created "+a);
if (node.hasChildNodes()) {
Node childNode = node.getFirstChild();
while (childNode != null) {
String childNodeName = childNode.getNodeName();
// System.err.println("childNodeName = "+childNodeName);
if (childNodeName != null && childNodeName.equals("Item")) {
// should check item number, but ignore for now :(
// System.err.println("Adding item to sequence");
AttributeList itemList = new AttributeList();
addAttributesFromNodeToList(itemList, childNode);
a.addItem(itemList);
}
// else may be a #text element in between
childNode = childNode.getNextSibling();
}
}
// System.err.println("Sequence Attribute is "+a);
list.put(tag, a);
} else {
Attribute a = AttributeFactory.newAttribute(tag, vr);
// System.err.println("Created "+a);
if (node.hasChildNodes()) {
Node childNode = node.getFirstChild();
while (childNode != null) {
String childNodeName = childNode.getNodeName();
// System.err.println("childNodeName = "+childNodeName);
if (childNodeName != null && childNodeName.equals("value")) {
// should check value number, but ignore for now :(
String value = childNode.getTextContent();
// System.err.println("Value value = "+value);
if (value != null) {
value =
StringUtilities.removeLeadingOrTrailingWhitespaceOrISOControl(
value); // just in case
a.addValue(value);
}
}
// else may be a #text element in between
childNode = childNode.getNextSibling();
}
}
// System.err.println("Attribute is "+a);
list.put(tag, a);
}
}
}
}
}
node = node.getNextSibling();
}
}
}