Darren Coleman created CAMEL-19079:
--------------------------------------
Summary: NullPointerException thrown when using the
language:xquery endpoint
Key: CAMEL-19079
URL: https://issues.apache.org/jira/browse/CAMEL-19079
Project: Camel
Issue Type: Bug
Components: camel-language, camel-saxon
Affects Versions: 3.20.1
Reporter: Darren Coleman
I get a {{NullPointerException}} when running a basic route that sends data to
the {{language:xquery}} endpoint. It looks like the exception is caused the the
Saxon Configuration object not being initialized.
Here is an example that reproduces the error:
{code:java}
public class CamelXQueryLanguageTest {
public static void main(String[] args) throws Exception {
CamelContext context = new DefaultCamelContext();
context.start();
ProducerTemplate producer = context.createProducerTemplate();
String result = producer.requestBody(
"language:xquery:upper-case(/message/text())",
"<message>Hello from XQuery</message>",
String.class);
System.out.println("Result: " + result);
context.stop();
}
}
{code}
Here is the stack trace from this code:
{code:java}
Exception in thread "main" org.apache.camel.CamelExecutionException: Exception
occurred during execution on the exchange: Exchange[]
at
org.apache.camel.CamelExecutionException.wrapCamelExecutionException(CamelExecutionException.java:45)
at
org.apache.camel.support.ExchangeHelper.extractResultBody(ExchangeHelper.java:660)
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.requestBody(DefaultProducerTemplate.java:414)
at
org.acme.CamelXQueryLanguageTest.main(CamelXQueryLanguageTest.java:14)
Caused by: org.apache.camel.RuntimeExpressionException:
java.lang.NullPointerException: Cannot invoke
"net.sf.saxon.Configuration.makeErrorReporter()" because "config" is null
at
org.apache.camel.component.xquery.XQueryBuilder.evaluate(XQueryBuilder.java:202)
at
org.apache.camel.component.xquery.XQueryBuilder.evaluate(XQueryBuilder.java:167)
at
org.apache.camel.component.language.LanguageProducer.process(LanguageProducer.java:110)
at
org.apache.camel.support.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:66)
at
org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:214)
at
org.apache.camel.impl.engine.SharedCamelInternalProcessor$1.process(SharedCamelInternalProcessor.java:111)
at
org.apache.camel.impl.engine.DefaultAsyncProcessorAwaitManager.process(DefaultAsyncProcessorAwaitManager.java:83)
at
org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:108)
at
org.apache.camel.support.cache.DefaultProducerCache.send(DefaultProducerCache.java:199)
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.requestBody(DefaultProducerTemplate.java:413)
... 1 more
Caused by: java.lang.NullPointerException: Cannot invoke
"net.sf.saxon.Configuration.makeErrorReporter()" because "config" is null
at
net.sf.saxon.query.DynamicQueryContext.<init>(DynamicQueryContext.java:58)
at
org.apache.camel.component.xquery.XQueryBuilder.createDynamicContext(XQueryBuilder.java:569)
at
org.apache.camel.component.xquery.XQueryBuilder.evaluateAsDOM(XQueryBuilder.java:230)
at
org.apache.camel.component.xquery.XQueryBuilder.evaluate(XQueryBuilder.java:192)
... 12 more
{code}
If I create an instance of the Configuration object explicitly and set it in
the XQueryLanguage, that NPE disappears only for another one to be thrown when
evaluating the expression.
For example, if I add the following 2 lines before starting the context:
{code:java}
XQueryLanguage language = (XQueryLanguage) context.resolveLanguage("xquery");
language.setConfiguration(new Configuration());
context.start();
{code}
An exception now appears via:
{code}
Caused by: org.apache.camel.RuntimeExpressionException:
java.lang.NullPointerException: Cannot invoke
"net.sf.saxon.query.XQueryExpression.run(net.sf.saxon.query.DynamicQueryContext,
javax.xml.transform.Result, java.util.Properties)" because "expression" is null
at
org.apache.camel.component.xquery.XQueryBuilder.evaluate(XQueryBuilder.java:202)
at
org.apache.camel.component.xquery.XQueryBuilder.evaluate(XQueryBuilder.java:167)
at
org.apache.camel.component.language.LanguageProducer.process(LanguageProducer.java:110)
at
org.apache.camel.support.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:66)
at
org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:214)
at
org.apache.camel.impl.engine.SharedCamelInternalProcessor$1.process(SharedCamelInternalProcessor.java:111)
at
org.apache.camel.impl.engine.DefaultAsyncProcessorAwaitManager.process(DefaultAsyncProcessorAwaitManager.java:83)
at
org.apache.camel.impl.engine.SharedCamelInternalProcessor.process(SharedCamelInternalProcessor.java:108)
at
org.apache.camel.support.cache.DefaultProducerCache.send(DefaultProducerCache.java:199)
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.requestBody(DefaultProducerTemplate.java:413)
... 1 more
Caused by: java.lang.NullPointerException: Cannot invoke
"net.sf.saxon.query.XQueryExpression.run(net.sf.saxon.query.DynamicQueryContext,
javax.xml.transform.Result, java.util.Properties)" because "expression" is null
at
org.apache.camel.component.xquery.XQueryBuilder.evaluateAsDOM(XQueryBuilder.java:232)
at
org.apache.camel.component.xquery.XQueryBuilder.evaluate(XQueryBuilder.java:192)
... 12 more
{code}
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