[CAMEL-11178] Default method on interface is invisible during Camel Simple evaluation

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.16.1
• Fix Version/s: 2.20.0
• Component/s: camel-core
• Estimated Complexity: Unknown
• External issue URL: http://stackoverflow.com/questions/43519252
• Assignee: Claus Ibsen
• Reporter: Anton Sulim
• Created: 20/Apr/17 13:23
• Updated: 05/Jun/17 06:54
• Resolved: 02/Jun/17 07:19

Description

Issue can be reproduced with below unit test, I have not found it in tracker.
Essence: interface A has default method, interface B extends A, default method is invisible during Simple language evaluation.

import org.apache.camel.CamelContext;
import org.apache.camel.Exchange;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.impl.DefaultCamelContext;
import org.apache.camel.impl.DefaultExchange;
import org.junit.Assert;
import org.junit.Test;

public class DefaultMethodIsInvisibleTest {

    public static interface A {
        public default String defaultMethod() {
            return "default method result";
        }
    }

    public static interface B extends A {
    }

    @Test
    public void camelSimpleDoesNotSeeDefaultMethod() throws Exception {
        CamelContext context = new DefaultCamelContext();
        context.addRoutes(new RouteBuilder() {
            public void configure() {
                from("direct:camelSimpleDoesNotSeeDefaultMethod").script().simple("${exchangeProperty.myObject.defaultMethod}");
            }
        });
        context.start();

        Exchange incomingExchange = new DefaultExchange(context);
        incomingExchange.setProperty("myObject", new B() {
        });

        Exchange result = context.createProducerTemplate().send("direct:camelSimpleDoesNotSeeDefaultMethod", incomingExchange);

        Assert.assertNull(result.getException());
    }

}

Stacktrace:

Caused by: org.apache.camel.language.bean.RuntimeBeanExpressionException: Failed to invoke method: defaultMethod on null due to: org.apache.camel.component.bean.MethodNotFoundException: Method with name: defaultMethod not found on bean: com.ubs.wma.gfi.tradersbook.subscriber.DefaultMethodIsInvisibleTest$2@5dafbe45 of type: com.ubs.wma.gfi.tradersbook.subscriber.DefaultMethodIsInvisibleTest$2. Exchange[][Message: [Body is null]]
    at org.apache.camel.language.bean.BeanExpression$OgnlInvokeProcessor.process(BeanExpression.java:290)
    at org.apache.camel.language.bean.BeanExpression.evaluate(BeanExpression.java:114)
    ... 46 common frames omitted
Caused by: org.apache.camel.component.bean.MethodNotFoundException: Method with name: defaultMethod not found on bean: com.ubs.wma.gfi.tradersbook.subscriber.DefaultMethodIsInvisibleTest$2@5dafbe45 of type: com.ubs.wma.gfi.tradersbook.subscriber.DefaultMethodIsInvisibleTest$2. Exchange[][Message: [Body is null]]
    at org.apache.camel.component.bean.BeanInfo.createInvocation(BeanInfo.java:269)
    at org.apache.camel.component.bean.BeanInfo.createInvocation(BeanInfo.java:183)
    at org.apache.camel.component.bean.BeanProcessor.process(BeanProcessor.java:159)

Issue Links

• links to: GitHub Pull Request #1733