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https://issues.apache.org/jira/browse/DAFFODIL-2110?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Lawrence updated DAFFODIL-2110:
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Fix Version/s: 2.4.0
> Cannot change bitorder mid schema
> ---------------------------------
>
> Key: DAFFODIL-2110
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2110
> Project: Daffodil
> Issue Type: Bug
> Components: Back End
> Affects Versions: 2.4.0
> Reporter: Brandon Sloane
> Priority: Major
> Fix For: 2.4.0
>
> Attachments: BitOrder.tdml
>
>
> Setting the bitOrder in the middle of a schema appears to have no effect.
> Consider the following schema:
> {quote}<xs:element name="changeOnSequence" dfdl:lengthKind='implicit'>
> <xs:complexType>
> <xs:sequence>
> <xs:sequence dfdl:bitOrder="mostSignificantBitFirst">
> <xs:element name="A" type="xs:unsignedInt" dfdl:length="8"/>
> <xs:element name="B" type="xs:unsignedInt" dfdl:length="8"/>
> </xs:sequence>
> <xs:sequence dfdl:bitOrder="leastSignificantBitFirst"
> dfdl:byteOrder="littleEndian">
> <xs:element name="C" type="xs:unsignedInt" dfdl:length="8"
> dfdl:bitOrder="leastSignificantBitFirst" dfdl:byteOrder="littleEndian"/>
> <xs:element name="D" type="xs:unsignedInt" dfdl:length="8"/>
> </xs:sequence>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> {quote}
> With the following test:
> {quote}<tdml:parserTestCase name="bitOrderChangeOnSequence"
> root="changeOnSequence" model="s6" description="Tests changing bitOrder when
> on a byte boundary.">
> <document xmlns="http://www.ibm.com/xmlns/dfdl/testData";>
> <documentPart type="bits">
> 0000 0001
> 0000 0001
> 1000 0000
> 1000 0000
> </documentPart>
> </document>
> <tdml:infoset>
> <tdml:dfdlInfoset xmlns:xs="http://www.w3.org/2001/XMLSchema";
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xmlns="http://example.com";>
> <changeOnSequence>
> <A>1</A>
> <B>1</B>
> <C>1</C>
> <D>1</D>
> </changeOnSequence>
> </tdml:dfdlInfoset>
> </tdml:infoset>
> </tdml:parserTestCase>
> {quote}
> (both snippets are in attached tdml as test name bitOrderChangeOnSequence.
> The attached TDML is an uncommited modified version of
> section05/simple_types/BitOrder.tdml )
> The actual result of parsing is:
> {quote}<changeOnSequence>
> <A>1</A>
> <B>1</B>
> <C>128</C>
> <D>128</D>
> </changeOnSequence>
> {quote}
> Note that the above schema attempts to change the bit order in 2 different
> ways:
> 1) On a sequence, and
> 2) On an element itself.
> Neither approach has any results.
> A possibly related issue is that ommiting the dfdl:byteOrder="littleEndian"
> on the xs:element results in an SDE, despite the fact that such is set on the
> enclosing sequence.
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