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https://issues.apache.org/jira/browse/DAFFODIL-2839?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Steve Lawrence resolved DAFFODIL-2839.
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Fix Version/s: 3.5.1
Resolution: Fixed
Fixed in commit af1a1963ebf3204e1f40dea87fb7747c6a46d8f3
> Cast from xs:double/xs:float to xs:unsignedLong fails with ClassCastException
> error
> -----------------------------------------------------------------------------------
>
> Key: DAFFODIL-2839
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2839
> Project: Daffodil
> Issue Type: Bug
> Components: Front End
> Reporter: Steve Lawrence
> Priority: Major
> Fix For: 3.5.1
>
>
> The following schema parses a double and then has an expression to convert
> that double to an unsignedLong:
> {code:xml}
> <element name="root">
> <complexType>
> <sequence>
> <element name="double" type="xs:double" />
> <element name="ulong" type="xs:unsignedLong" dfdl:inputValueCalc="{
> xs:unsignedLong(../double) }" />
> </sequence>
> </complexType>
> </element>
> {code}
> This fails with the exception:
> {code}
> rg.apache.daffodil.lib.exceptions.Abort: Invariant broken. Runtime.scala -
> Leaked exception: java.lang.ClassCastException: java.math.BigInteger cannot
> be cast to java.lang.Long
> java.lang.ClassCastException: java.math.BigInteger cannot be cast to
> java.lang.Long
> at
> org.apache.daffodil.runtime1.infoset.DataValue$.getLong$extension(DataValue.scala:91)
> at
> org.apache.daffodil.runtime1.dpath.LongToUnsignedLong$.computeValue(ConverterOps.scala:219)
> at
> org.apache.daffodil.runtime1.dpath.LongToUnsignedLong$.computeValue(ConverterOps.scala:217)
> at
> org.apache.daffodil.runtime1.dpath.Converter.run(DPathRuntime.scala:311)
> at
> org.apache.daffodil.runtime1.dpath.CompiledDPath.run(DPathRuntime.scala:148)
> at
> org.apache.daffodil.runtime1.dpath.CompiledDPath.runExpression(DPathRuntime.scala:73)
> at
> org.apache.daffodil.runtime1.dpath.RuntimeExpressionDPath.evaluateExpression(DPath.scala:283)
> at
> org.apache.daffodil.runtime1.dpath.RuntimeExpressionDPath.evaluateMaybe(DPath.scala:294)
> at
> org.apache.daffodil.runtime1.dpath.RuntimeExpressionDPath.evaluate(DPath.scala:307)
> {code}
> It seems like our expression compiler first converts the double to a long and
> then converts the long to an unsigned long, failing with the latter. Note
> that this is probably incorrect, since converting from a double to long first
> will limit the value to maxLong which it should not do.
> A sortof workaround is to change the expression to this:
> {code}
> xs:unsignedLong(xs:long(../double))
> {code}
> So we explicitly cast the double to a long, and then cast the long to the
> unsigned long. This still limits the range to maxLong, but does allow the
> conversion to succeed as expected as long as the double is in the range of 0
> to maxLong.
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