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https://issues.apache.org/jira/browse/CAMEL-3709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12998431#comment-12998431
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Claus Ibsen commented on CAMEL-3709:
------------------------------------

You found the easter egg. There is a todo in the source code to support 
endpoint via ref's

    // TODO: Support lookup endpoint by ref (requires a bit more work)


> interceptFrom and from(Endpoint) don't work together
> ----------------------------------------------------
>
>                 Key: CAMEL-3709
>                 URL: https://issues.apache.org/jira/browse/CAMEL-3709
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-core
>    Affects Versions: 2.5.0, 2.6.0
>            Reporter: Søren Markert
>            Assignee: Claus Ibsen
>            Priority: Minor
>
> When using interceptFrom(String) together with from(Endpoint), the below 
> Exception occurs during the routes building process. Looking at 
> RoutesDefinition.java:217 reveals, that the FromDefintion just created has no 
> URI. That causes the comparison to all the interceptFroms' URIs to fail. As 
> far as I can tell, the way to fix this would be to add 
> {{setUri(myEndpoint.getEndpointUri())}} in the constructor 
> {{FromDefinition(Endpoint endpoint)}}.
> Below the stack trace, there is a unit test that demonstrates the issue. 
> Until it if fixed, it can be easily circumvented by adding the commented-out 
> line, and then change to {{from("myEndpoint")}}.
> {code}
> org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint: 
> null due to: null
>       at 
> org.apache.camel.util.EndpointHelper.matchEndpoint(EndpointHelper.java:109)
>       at 
> org.apache.camel.model.RoutesDefinition.route(RoutesDefinition.java:217)
>       at 
> org.apache.camel.model.RoutesDefinition.from(RoutesDefinition.java:167)
>       at org.apache.camel.builder.RouteBuilder.from(RouteBuilder.java:101)
>       at 
> dk.mobilethink.adc2.endpoint.UnsetUriTest$1.configure(UnsetUriTest.java:18)
>       at 
> org.apache.camel.builder.RouteBuilder.checkInitialized(RouteBuilder.java:318)
>       at 
> org.apache.camel.builder.RouteBuilder.configureRoutes(RouteBuilder.java:273)
>       at 
> org.apache.camel.builder.RouteBuilder.addRoutesToCamelContext(RouteBuilder.java:259)
>       at 
> org.apache.camel.impl.DefaultCamelContext.addRoutes(DefaultCamelContext.java:612)
>       at 
> org.apache.camel.test.CamelTestSupport.setUp(CamelTestSupport.java:111)
>       at junit.framework.TestCase.runBare(TestCase.java:132)
>       at org.apache.camel.test.TestSupport.runBare(TestSupport.java:65)
>       at junit.framework.TestResult$1.protect(TestResult.java:110)
>       at junit.framework.TestResult.runProtected(TestResult.java:128)
>       at junit.framework.TestResult.run(TestResult.java:113)
>       at junit.framework.TestCase.run(TestCase.java:124)
>       at junit.framework.TestSuite.runTest(TestSuite.java:232)
>       at junit.framework.TestSuite.run(TestSuite.java:227)
>       at 
> org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
>       at 
> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
>       at 
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
>       at 
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
>       at 
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
>       at 
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
>       at 
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
> Caused by: java.lang.NullPointerException
>       at 
> org.apache.camel.util.UnsafeUriCharactersEncoder.encode(UnsafeUriCharactersEncoder.java:56)
>       at org.apache.camel.util.URISupport.normalizeUri(URISupport.java:162)
>       at 
> org.apache.camel.util.EndpointHelper.matchEndpoint(EndpointHelper.java:107)
>       ... 24 more
> {code}
> {code}
> package dk.mobilethink.adc2.endpoint;
> import org.apache.camel.Endpoint;
> import org.apache.camel.builder.RouteBuilder;
> import org.apache.camel.test.CamelTestSupport;
> public class UnsetUriTest extends CamelTestSupport {
>       @Override
>       protected RouteBuilder createRouteBuilder() throws Exception {
>               return new RouteBuilder() {
>                       public void configure() throws Exception {
>                               interceptFrom("URI1").to("irrelevantURI");
>                               Endpoint myEndpoint = 
> getContext().getComponent("direct").createEndpoint("ignoredURI");
>                               
> //                            getContext().addEndpoint("myEndpoint", 
> myEndpoint);
>                               from(myEndpoint)
>                                       .inOnly("log:foo");
>                       }
>               };
>       }
>       public void testNothing() { }
> }
> {code}

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