Sequence field example
Consider the following XML fragment:
Suppose that the following properties are set in the XML codec section of the IAF configuration file:
With these property values, the XML fragment maps to the following normalized event fields:
"Test.root/" =
"Test.root/prices#1/" =
"Test.root/prices#1/info#1/" =
"Test.root/prices#1/info#2/" =
"Test.root/prices#2/" =
"Test.root/prices#2/info#1/" =
"Test.root/prices#2/info#2/" =
"Test.root/prices/@instr" = ["(prices)", "MSFT", "(prices)", "IBM"]
"Test.root/prices/info/@type" =
["(prices)", "", "SELL", "(prices)", "BUY", "SELL"]
"Test.root/prices/info/text()"=
["(prices)", "1.04", "1.03", "(prices)", "", "1.06"]
If you define the following mapping rules in the IAF configuration file, you can map these normalized event fields to and from string fields in a sequence field of an Apama event.
<mapping-rules>
<map transport="Test.root/prices/@instr"
apama="instruments" type="reference"
referencetype="sequence <string>" default="[]"/>
<map transport="Test.root/prices/info/@type"
apama="types" type="reference"
referencetype="sequence <string>" default="[]"/>
<map transport="Test.root/prices/info/text()"
apama="prices" type="reference"
referencetype="sequence <string>" default="[]"/>
</mapping-rules>
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