[jira] [Commented] (DAFFODIL-2072) Poor reporting of schema errors when used as library

["Steve Lawrence (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DAFFODIL-2072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16775242#comment-16775242 ] 

Steve Lawrence commented on DAFFODIL-2072:
------------------------------------------

The Usage error indiates that you are using the API incorrectly. We could probably improve that error message instead of being an abort.

In this case, the original failure was in this line:
{code:java}
 val pf: ProcessorFactory = dfdlCompiler.compileSource(URISchemaSource(model).uriForLoading)


{code}

> Poor reporting of schema errors when used as library
> ----------------------------------------------------
>
>                 Key: DAFFODIL-2072
>                 URL: https://issues.apache.org/jira/browse/DAFFODIL-2072
>             Project: Daffodil
>          Issue Type: Bug
>          Components: API
>    Affects Versions: 2.3.0
>            Reporter: Brandon Sloane
>            Priority: Major
>         Attachments: Main.scala, test.dfdl.xsd
>
>
> When used as a library, Daffodil does not produce a meaningfull error when provided with an invalid schema file.
> Consider the following Scala program (Main.scala):
> {quote}package com.tresys.test
> import org.apache.daffodil.sapi.Daffodil
> import org.apache.daffodil.sapi.Compiler
> import org.apache.daffodil.util.Misc
> import org.apache.daffodil.sapi.ProcessorFactory
> import org.apache.daffodil.sapi.DataProcessor
> import org.apache.daffodil.api.URISchemaSource
> object Main extends App {
>  override def main(args: Array[String]): Unit = {
>  val dfdlCompiler: Compiler = Daffodil.compiler()
>  val model = Misc.getRequiredResource("test.dfdl.xsd")
>  val pf: ProcessorFactory = dfdlCompiler.compileSource(URISchemaSource(model).uriForLoading)
>  val df: DataProcessor = pf.onPath("/")
>  }
> }
> {quote}
> The relevent portion of test.dfdl.xsd is:
> {quote}<xs:element name="top" type="tns:nonexistant" />
> {quote}
> where tns:nonexistant is never defined.
> {quote}Executing Main.scala produces the following error:
> Exception in thread "main" org.apache.daffodil.exceptions.Abort: Usage error: ProcessorFactory.this.isError.unary_!
> org.apache.daffodil.exceptions.Assert$.abort(Assert.scala:129)
> org.apache.daffodil.compiler.ProcessorFactory.$anonfun$onPath$1(Compiler.scala:131)
> scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
> org.apache.daffodil.ExecutionMode$.$anonfun$usingCompilerMode$1(ExecutionMode.scala:64)
>  at org.apache.daffodil.exceptions.Assert$.abort(Assert.scala:129)
>  at org.apache.daffodil.compiler.ProcessorFactory.$anonfun$onPath$1(Compiler.scala:131)
>  at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
>  at org.apache.daffodil.ExecutionMode$.$anonfun$usingCompilerMode$1(ExecutionMode.scala:64)
>  at org.apache.daffodil.compiler.ProcessorFactory.onPath(Compiler.scala:130)
>  at org.apache.daffodil.sapi.ProcessorFactory.onPath(Daffodil.scala:273)
>  at com.tresys.test.Main$.main(Main.scala:16)
>  at com.tresys.test.Main.main(Main.scala)
> {quote}
> For reference, using the CLI produces the following (good) error:
> {quote}[error] Schema Definition Error: Error loading schema due to org.xml.sax.SAXParseException; systemId: file:/home/bsloane/workspace/Test/src/test.dfdl.xsd; lineNumber: 35; columnNumber: 51; src-resolve: Cannot resolve the name 'tns:nonexistant' to a(n) 'type definition' component.
> Schema context: file:/home/bsloane/workspace/Test/src/test.dfdl.xsd Location in file:??
> {quote}



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