stevedlawrence commented on a change in pull request #218: Implement
dfdl:choiceLength='explicit'
URL: https://github.com/apache/incubator-daffodil/pull/218#discussion_r286260093
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File path:
daffodil-runtime1-unparser/src/main/scala/org/apache/daffodil/processors/unparsers/SpecifiedLengthUnparsers.scala
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@@ -428,3 +429,20 @@ class SpecifiedLengthPrefixedUnparser(
}
}
+
+class ChoiceLengthUnparser(
+ eUnparser: Unparser,
+ rd: TermRuntimeData)
+ extends CombinatorUnparser(rd)
+ with CaptureUnparsingValueLength {
+
+ override lazy val runtimeDependencies = Vector()
+ override lazy val childProcessors = Vector(eUnparser)
+
+ override def unparse(state: UState): Unit = {
+ val elem = state.currentInfosetNode.asInstanceOf[DIElement]
+ captureValueLengthStart(state, elem)
+ eUnparser.unparse1(state)
+ captureValueLengthEnd(state, elem)
+ }
Review comment:
I think this is where things would need to change to create a new thing in
the infoset where we can hang length information. Note that I think in the
example I gave above, this would capture different lengths on the "foo" elem
when each choice unparse was run.
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