[CAMEL-10236] BeanProccessor - method invocation with generics+annotations

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.17.2
• Fix Version/s: 2.18.1, 2.19.0
• Component/s: camel-core
• Estimated Complexity: Unknown
• Assignee: Claus Ibsen
• Reporter: Bernard Ligny
• Created: 11/Aug/16 08:00
• Updated: 13/Oct/16 08:23
• Resolved: 13/Oct/16 08:23

Description

The following code does not work:

public interface Transformer<T> {	
	 public Object convert(T input) throws Exception;
}

public class MyTransformer implements Transformer<InputStream> {
    @Override
    public Object convert(@Body InputStream body) {...}
}

from("direct:foo")
.transform().method(new MyTransformer(), "convert")
.log("${body}");

Stack trace:

java.lang.ClassCastException: [B cannot be cast to java.io.InputStream
	at net.haulogy.erpgis.esb.transformers.MyTransformer.convert(MyTransformer.java:1)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.camel.component.bean.MethodInfo.invoke(MethodInfo.java:408)
	at org.apache.camel.component.bean.MethodInfo$1.doProceed(MethodInfo.java:279)
	at org.apache.camel.component.bean.MethodInfo$1.proceed(MethodInfo.java:252)
	at org.apache.camel.component.bean.BeanProcessor.process(BeanProcessor.java:177)
	at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:109)
	at org.apache.camel.component.bean.BeanProcessor.process(BeanProcessor.java:68)
	at org.apache.camel.language.bean.BeanExpression$InvokeProcessor.process(BeanExpression.java:211)
	at org.apache.camel.language.bean.BeanExpression.evaluate(BeanExpression.java:126)
	at org.apache.camel.language.bean.BeanExpression.evaluate(BeanExpression.java:138)
	at org.apache.camel.processor.TransformProcessor.process(TransformProcessor.java:50)

But this is working fine:

public class MyTransformer {
    public Object convert(@Body InputStream body) {...}
}

from("direct:foo")
.transform().method(new MyTransformer(), "convert")
.log("${body}");