[CAMEL-20438] camel-xslt - XPath evaluation fails in Java DSL routes

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.4.0
• Fix Version/s: 4.4.1, 4.5.0
• Component/s: camel-xslt
• Estimated Complexity: Unknown
• Assignee: Claus Ibsen
• Reporter: Alexandru Neaţă
• Created: 20/Feb/24 10:39
• Updated: 21/Feb/24 10:21
• Resolved: 21/Feb/24 10:21

Description

The following route fails to evaluate the xpath:

from("direct:hello")
        .routeId("xpath-route")
        .setBody(xpath("//hello/id", Integer.class))
        .to("direct:goodbye");

There seems to be an issue with the instance of QName used. I think it should be XPathConstants.NODESET but instead it is a custom instance with nulled namespace field.

Full project example: https://github.com/alex-nt/issues-java/tree/main/camel/camel-xpath
Running mvn clean install in the module should reproduce the issue.

Error

 

org.apache.camel.CamelExecutionException: Exception occurred during execution on the exchange: Exchange[D855A498421B27E-0000000000000000]
    at org.apache.camel.CamelExecutionException.wrapCamelExecutionException(CamelExecutionException.java:45)
    at org.apache.camel.support.ExchangeHelper.extractResultBody(ExchangeHelper.java:676)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.extractResultBody(DefaultProducerTemplate.java:591)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.extractResultBody(DefaultProducerTemplate.java:587)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:189)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:195)
    at com.example.issues.camel.xpath.AppTest.sendXml(AppTest.java:24)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
Caused by: java.lang.IllegalArgumentException: UnSupported Return Type : NODESET
    at java.xml/com.sun.org.apache.xpath.internal.jaxp.XPathImplUtil.isSupported(XPathImplUtil.java:252)
    at java.xml/com.sun.org.apache.xpath.internal.jaxp.XPathExpressionImpl.evaluate(XPathExpressionImpl.java:87)
    at org.apache.camel.language.xpath.XPathBuilder.doInEvaluateAs(XPathBuilder.java:1022)
    at org.apache.camel.language.xpath.XPathBuilder.evaluateAs(XPathBuilder.java:910)
    at org.apache.camel.language.xpath.XPathBuilder.evaluate(XPathBuilder.java:877)
    at org.apache.camel.language.xpath.XPathBuilder.evaluate(XPathBuilder.java:202)
    at org.apache.camel.support.builder.ExpressionBuilder$46.evaluate(ExpressionBuilder.java:1546)
    at org.apache.camel.support.ExpressionAdapter.evaluate(ExpressionAdapter.java:45)
    at org.apache.camel.processor.SetBodyProcessor.process(SetBodyProcessor.java:45)
    at org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$SimpleTask.handleFirst(RedeliveryErrorHandler.java:462)
    at org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$SimpleTask.run(RedeliveryErrorHandler.java:438)
    at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.doRun(DefaultReactiveExecutor.java:199)
    at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.executeReactiveWork(DefaultReactiveExecutor.java:189)
    at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.tryExecuteReactiveWork(DefaultReactiveExecutor.java:166)
    at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.schedule(DefaultReactiveExecutor.java:148)
    at org.apache.camel.impl.engine.DefaultReactiveExecutor.scheduleMain(DefaultReactiveExecutor.java:59)
    at org.apache.camel.processor.Pipeline.process(Pipeline.java:163)
    at org.apache.camel.impl.engine.CamelInternalProcessor.processNonTransacted(CamelInternalProcessor.java:354)
    at org.apache.camel.impl.engine.CamelInternalProcessor.process(CamelInternalProcessor.java:330)
    at org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:96)
    at org.apache.camel.impl.engine.SharedCamelInternalProcessor.processNonTransacted(SharedCamelInternalProcessor.java:199)
    at org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:173)
    at org.apache.camel.impl.engine.SharedCamelInternalProcessor$1.process(SharedCamelInternalProcessor.java:109)
    at org.apache.camel.impl.engine.DefaultAsyncProcessorAwaitManager.process(DefaultAsyncProcessorAwaitManager.java:82)
    at org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:106)
    at org.apache.camel.support.cache.DefaultProducerCache.send(DefaultProducerCache.java:178)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:176)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:172)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:153)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:187)
    ... 5 more

Error SAXON

 

org.apache.camel.CamelExecutionException: Exception occurred during execution on the exchange: Exchange[ACF3176A861BA1E-0000000000000000]
    at org.apache.camel.CamelExecutionException.wrapCamelExecutionException(CamelExecutionException.java:45)
    at org.apache.camel.support.ExchangeHelper.extractResultBody(ExchangeHelper.java:676)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.extractResultBody(DefaultProducerTemplate.java:591)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.extractResultBody(DefaultProducerTemplate.java:587)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:189)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:195)
    at com.example.issues.camel.xpath.AppTest.sendXml(AppTest.java:24)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
Caused by: java.lang.IllegalArgumentException: qName: Unknown type for expected result
    at net.sf.saxon.xpath.XPathExpressionImpl.evaluate(XPathExpressionImpl.java:230)
    at org.apache.camel.language.xpath.XPathBuilder.doInEvaluateAs(XPathBuilder.java:1022)
    at org.apache.camel.language.xpath.XPathBuilder.evaluateAs(XPathBuilder.java:910)
    at org.apache.camel.language.xpath.XPathBuilder.evaluate(XPathBuilder.java:877)
    at org.apache.camel.language.xpath.XPathBuilder.evaluate(XPathBuilder.java:202)
    at org.apache.camel.support.builder.ExpressionBuilder$46.evaluate(ExpressionBuilder.java:1546)
    at org.apache.camel.support.ExpressionAdapter.evaluate(ExpressionAdapter.java:45)
    at org.apache.camel.processor.SetBodyProcessor.process(SetBodyProcessor.java:45)
    at org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$SimpleTask.handleFirst(RedeliveryErrorHandler.java:462)
    at org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$SimpleTask.run(RedeliveryErrorHandler.java:438)
    at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.doRun(DefaultReactiveExecutor.java:199)
    at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.executeReactiveWork(DefaultReactiveExecutor.java:189)
    at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.tryExecuteReactiveWork(DefaultReactiveExecutor.java:166)
    at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.schedule(DefaultReactiveExecutor.java:148)
    at org.apache.camel.impl.engine.DefaultReactiveExecutor.scheduleMain(DefaultReactiveExecutor.java:59)
    at org.apache.camel.processor.Pipeline.process(Pipeline.java:163)
    at org.apache.camel.impl.engine.CamelInternalProcessor.processNonTransacted(CamelInternalProcessor.java:354)
    at org.apache.camel.impl.engine.CamelInternalProcessor.process(CamelInternalProcessor.java:330)
    at org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:96)
    at org.apache.camel.impl.engine.SharedCamelInternalProcessor.processNonTransacted(SharedCamelInternalProcessor.java:199)
    at org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:173)
    at org.apache.camel.impl.engine.SharedCamelInternalProcessor$1.process(SharedCamelInternalProcessor.java:109)
    at org.apache.camel.impl.engine.DefaultAsyncProcessorAwaitManager.process(DefaultAsyncProcessorAwaitManager.java:82)
    at org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:106)
    at org.apache.camel.support.cache.DefaultProducerCache.send(DefaultProducerCache.java:178)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:176)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:172)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.send(DefaultProducerTemplate.java:153)
    at org.apache.camel.impl.engine.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:187)
    ... 5 more

Issue Links

• links to: GitHub Pull Request #13234