Use this task to convert an SIMessage object to a byte array.
About this task
If you want to save an SIMessage object in your local file system
or in a database, you must first convert the object to a byte array and format
string. You can reconstruct the message from the byte array and format string.
To do this, take the following steps:
Procedure
- In your application program, record the format string associated
with the SIMessage instance. For example:
String savedFormat=message.getFormat();
- Call the getDataGraphAsBytes. For
example:
Bytes newDataGraph = message.getNewDataGraph(newFormat);
This method returns a copy of the payload as a byte stream. You
can store the bytes and the associated format string, as you require.
- To reconstruct the message, call the method createDataGraph provided
by the SIDataGraphFactory API. This method requires a byte array
and a format string. For example:
DataGraph newDataGraph = SIDataGraphFactory.getInstance().createDataGraph(byteArray, newFormat);
This method creates a new data graph by parsing the
bytes according to the format passed to the method.
What to do next
You can use the newly created datagraph as the payload of an SIMessage
instance by using the SIMessage setDataGraph() method. For example:
newMessage.setDataGraph(newDataGraph, savedFormat);