stevedlawrence commented on a change in pull request #61: Base64, gzip, and
line-folding layering
URL: https://github.com/apache/incubator-daffodil/pull/61#discussion_r185545826
##########
File path:
daffodil-core/src/main/scala/org/apache/daffodil/dsom/SequenceGroup.scala
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@@ -245,6 +248,31 @@ abstract class SequenceTermBase(
maybeCheckBitOrderAndCharset)
}
+ private val layeredSequenceAllowedProps = Set("ref", "layerTransform",
"layerEncoding", "layerLengthKind", "layerLength", "layerLengthUnits",
"layerBoundaryMark")
+
+ final lazy val maybeLayerTransformerEv: Maybe[LayerTransformerEv] = {
+ if (maybeLayerTransformEv.isEmpty) Maybe.Nope
+ else { // need to check that only layering properties are specified
+ val localProps = this.formatAnnotation.justThisOneProperties
+ val localKeys = localProps.keySet
+ val disallowedKeys = localKeys.filterNot(k =>
layeredSequenceAllowedProps.contains(k))
+ if (disallowedKeys.size > 0)
+ SDE("Sequence has dfdl:layerTransform specified, so cannot have
non-layering properties: %s", disallowedKeys)
Review comment:
Should this be something like ``disallowedKeys.mkString(", ")`` so the
output isn't something like ``cannot have non-layering properties: Seq("foo",
"bar")``. Also, does formatAnnotation.justThisOneProperties filter out
annotations in other namespaces, which should be allowed? Might be worth adding
a test to make sure this works as expected?
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