public ActiveMQMessage convertFrame(StompProtocolConverter converter, StompFrame command)
throws JMSException, ProtocolException {
final Map<?, ?> headers = command.getHeaders();
final ActiveMQMessage msg;
/*
* To reduce the complexity of this method perhaps a Chain of Responsibility
* would be a better implementation
*/
if (headers.containsKey(Stomp.Headers.AMQ_MESSAGE_TYPE)) {
String intendedType = (String) headers.get(Stomp.Headers.AMQ_MESSAGE_TYPE);
if (intendedType.equalsIgnoreCase("text")) {
ActiveMQTextMessage text = new ActiveMQTextMessage();
try {
ByteArrayOutputStream bytes = new ByteArrayOutputStream(command.getContent().length + 4);
DataOutputStream data = new DataOutputStream(bytes);
data.writeInt(command.getContent().length);
data.write(command.getContent());
text.setContent(bytes.toByteSequence());
data.close();
} catch (Throwable e) {
throw new ProtocolException("Text could not bet set: " + e, false, e);
}
msg = text;
} else if (intendedType.equalsIgnoreCase("bytes")) {
ActiveMQBytesMessage byteMessage = new ActiveMQBytesMessage();
byteMessage.writeBytes(command.getContent());
msg = byteMessage;
} else {
throw new ProtocolException("Unsupported message type '" + intendedType + "'", false);
}
} else if (headers.containsKey(Stomp.Headers.CONTENT_LENGTH)) {
headers.remove(Stomp.Headers.CONTENT_LENGTH);
ActiveMQBytesMessage bm = new ActiveMQBytesMessage();
bm.writeBytes(command.getContent());
msg = bm;
} else {
ActiveMQTextMessage text = new ActiveMQTextMessage();
try {
ByteArrayOutputStream bytes = new ByteArrayOutputStream(command.getContent().length + 4);
DataOutputStream data = new DataOutputStream(bytes);
data.writeInt(command.getContent().length);
data.write(command.getContent());
text.setContent(bytes.toByteSequence());
data.close();
} catch (Throwable e) {
throw new ProtocolException("Text could not bet set: " + e, false, e);
}
msg = text;
}
Helper.copyStandardHeadersFromFrameToMessage(converter, command, msg, this);
return msg;
}
@Override
public ActiveMQMessage convertFrame(ProtocolConverter converter, StompFrame command)
throws JMSException, ProtocolException {
Map<String, String> headers = command.getHeaders();
ActiveMQMessage msg;
String transformation = headers.get(Headers.TRANSFORMATION);
if (headers.containsKey(Headers.CONTENT_LENGTH)
|| transformation.equals(Transformations.JMS_BYTE.toString())) {
msg = super.convertFrame(converter, command);
} else {
HierarchicalStreamReader in;
try {
String text = new String(command.getContent(), "UTF-8");
switch (Transformations.getValue(transformation)) {
case JMS_OBJECT_XML:
in = new XppReader(new StringReader(text), XppFactory.createDefaultParser());
msg = createObjectMessage(in);
break;
case JMS_OBJECT_JSON:
in = new JettisonMappedXmlDriver().createReader(new StringReader(text));
msg = createObjectMessage(in);
break;
case JMS_MAP_XML:
in = new XppReader(new StringReader(text), XppFactory.createDefaultParser());
msg = createMapMessage(in);
break;
case JMS_MAP_JSON:
in = new JettisonMappedXmlDriver().createReader(new StringReader(text));
msg = createMapMessage(in);
break;
default:
throw new Exception("Unkown transformation: " + transformation);
}
} catch (Throwable e) {
command.getHeaders().put(Headers.TRANSFORMATION_ERROR, e.getMessage());
msg = super.convertFrame(converter, command);
}
}
copyStandardHeadersFromFrameToMessage(converter, command, msg, this);
return msg;
}