[CAMEL-10385] simple ognl expression issue w/ list & spring boot

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.17.0, 2.17.3, 2.18.0
• Fix Version/s: 2.18.1, 2.19.0
• Component/s: camel-spring-boot
• Patch Info: Patch Available
• Estimated Complexity: Unknown
• Flags: Patch
• Assignee: Claus Ibsen
• Reporter: Dmitriy Frolov
• Created: 13/Oct/16 03:18
• Updated: 14/Oct/16 13:22
• Resolved: 14/Oct/16 08:14

Description

conflict running simple expression w/ list under spring boot. SpringTypeConverter is registered as a fallback converter which gets picked up during ognl while attempting to convert list -> map causing an exception instead of a null response that is expected. It is happening under 2.17 & 2.18.

sample expression: ${body.list[0].field}

10:20:32.499 [main] TRACE o.a.c.i.c.DefaultTypeConverter | Converting java.util.ArrayList -> java.util.Map
10:20:32.500 [main] TRACE o.a.c.i.c.DefaultTypeConverter | Using converter: org.apache.camel.impl.converter.ArrayTypeConverter@79d7035 to convert [class java.util.ArrayList=>interface java.util.Map]

Caused by: org.apache.camel.TypeConversionException: Error during type conversion from type: java.util.ArrayList to the required type: java.util.Map with due Failed to convert from type [java.util.ArrayList<?>] to type [java.util.Map<?, ?>]
at org.apache.camel.impl.converter.BaseTypeConverterRegistry.createTypeConversionException(BaseTypeConverterRegistry.java:629)
at org.apache.camel.impl.converter.BaseTypeConverterRegistry.convertTo(BaseTypeConverterRegistry.java:150)
at org.apache.camel.impl.converter.BaseTypeConverterRegistry.convertTo(BaseTypeConverterRegistry.java:121)
at org.apache.camel.language.bean.BeanExpression$OgnlInvokeProcessor.lookupResult(BeanExpression.java:358)
at org.apache.camel.language.bean.BeanExpression$OgnlInvokeProcessor.process(BeanExpression.java:334)
at org.apache.camel.language.bean.BeanExpression.evaluate(BeanExpression.java:114)
... 55 common frames omitted
Caused by: org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.util.ArrayList<?>] to type [java.util.Map<?, ?>]
at org.springframework.core.convert.support.ConversionUtils.invokeConverter(ConversionUtils.java:42)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:192)
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:176)
at org.apache.camel.spring.boot.SpringTypeConverter.convertTo(SpringTypeConverter.java:46)
at org.apache.camel.impl.converter.BaseTypeConverterRegistry.doConvertTo(BaseTypeConverterRegistry.java:346)
at org.apache.camel.impl.converter.BaseTypeConverterRegistry.convertTo(BaseTypeConverterRegistry.java:133)
... 59 common frames omitted

Issue Links

• links to: GitHub Pull Request #1209