默认方法在 Camel Simple 评估期间不可见

Question

问题可以通过下面的单元测试重现，我没有在跟踪器中找到它。本质：接口A有默认方法，接口B扩展A，默认方法在简单语言评估期间是不可见的。骆驼版本 2.16.1。我错过了什么吗？

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 {
    @Test
    public void camelSimpleDoesNotSeeDefaultMethod() throws Exception {
        CamelContext context = new DefaultCamelContext();
        context.addRoutes(new RouteBuilder() {
            public void configure() {
                from("direct:camelSimpleDoesNotSeeDefaultMethod").log("Result of default method invocation is ${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());
    }

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

public static interface B extends A {
}
}

堆栈跟踪：

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@5dafbe45 of type: com.ubs.wma.gfi.tradersbook.subscriber.DefaultMethodIsInvisibleTest. 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@5dafbe45 of type: com.ubs.wma.gfi.tradersbook.subscriber.DefaultMethodIsInvisibleTest. 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)

Answer 1

接口上的默认方法未明确支持 AFAIR。欢迎登录JIRA

默认方法在 Camel Simple 评估期间不可见

Default method is invisible during Camel Simple evaluation

apache-camel

java-8

default-method