[CAMEL-15811] report-maven-plugin fails to validate simple expression

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.6.0
• Fix Version/s: 3.7.0
• Component/s: tooling
• Estimated Complexity: Unknown
• Assignee: Unassigned
• Reporter: Marco Collovati
• Created: 04/Nov/20 16:54
• Updated: 05/Nov/20 07:11
• Resolved: 05/Nov/20 07:11

Description

Starting from camel 3.6, camel-report-maven-plugin validate goal  fails to validate simple expressions; on console log I see an error [null] for every expression, also simple ones like ${body.id}.

Debugging a bit I found that error is due to a NPE on the ExpressionAdapter created
in SimpleExpressionBuilder.bodyOgnlExpression, and more specifically in the
init method, that uses CamelContext to resolve bean language.

When running from maven goal execution, at a certain point, init method is called with a null CamelContext reference and this causes the NPE.

Below an extract of the stacktrace

 

 java.lang.NullPointerException
 at org.apache.camel.language.simple.SimpleExpressionBuilder$28.init(SimpleExpressionBuilder.java:761)
 at org.apache.camel.language.simple.ast.SimpleFunctionExpression.createExpression(SimpleFunctionExpression.java:61)
 at org.apache.camel.language.simple.ast.SimpleFunctionStart.doCreateLiteralExpression(SimpleFunctionStart.java:70)
 at org.apache.camel.language.simple.ast.SimpleFunctionStart.createExpression(SimpleFunctionStart.java:60)
 at org.apache.camel.language.simple.SimpleExpressionParser.createExpressions(SimpleExpressionParser.java:165)
 at org.apache.camel.language.simple.SimpleExpressionParser.doParseExpression(SimpleExpressionParser.java:88)
 at org.apache.camel.language.simple.SimpleExpressionParser.parseExpression(SimpleExpressionParser.java:55)
 at org.apache.camel.language.simple.SimpleLanguage.createExpression(SimpleLanguage.java:132)

In 3.5 *init* method was nor overridden by the ExpressionAdapter nor invoked in SimpleFunctionExpression.createExpression.