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  1. RESTEasy
  2. RESTEASY-1209

org.jboss.resteasy.util.Types#getActualTypeArgumentsOfAnInterface not working for lambda's.

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Details

    • Bug
    • Resolution: Unresolved
    • Minor
    • None
    • 3.0.10.Final, 3.6.2.Final
    • jaxrs
    • None
    • Hide

      Run the code as given in the description.

      Show
      Run the code as given in the description.
    • Compatibility/Configuration
    • Workaround Exists
    • Hide

      Don't use lambda's. The point is that IDE's may suggest changing your code in a lambda, and the error message given by Resteasy is not very helpful.

      Show
      Don't use lambda's. The point is that IDE's may suggest changing your code in a lambda, and the error message given by Resteasy is not very helpful.

    Description

       package org.jboss.resteasy.spi;

import org.junit.Test;

import javax.ws.rs.ext.ContextResolver;

public class ResteasyProviderFactoryTest  {
@Test
	public void testRegisterProviderAsLambda() throws Exception {

		ResteasyProviderFactory factory = new ResteasyProviderFactory();
		factory.register((ContextResolver<String>) type -> "foo bar");

	}
}

      Then it doesn't work:

      java.lang.RuntimeException: Unable to instantiate ContextResolver
	at org.jboss.resteasy.spi.ResteasyProviderFactory.registerProviderInstance(ResteasyProviderFactory.java:1814)
	at org.jboss.resteasy.spi.ResteasyProviderFactory.registerProviderInstance(ResteasyProviderFactory.java:1728)
	at org.jboss.resteasy.spi.ResteasyProviderFactory.register(ResteasyProviderFactory.java:2410)
	at org.jboss.resteasy.spi.ResteasyProviderFactoryTest.testRegisterProviderAsLambda(ResteasyProviderFactoryTest.java:27)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
	at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
	at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
	at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
	at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
	at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:66)
	at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
	at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
	at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
	at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:130)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:74)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:211)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
	at org.jboss.resteasy.spi.ResteasyProviderFactory.addContextResolver(ResteasyProviderFactory.java:1124)
	at org.jboss.resteasy.spi.ResteasyProviderFactory.addContextResolver(ResteasyProviderFactory.java:1119)
	at org.jboss.resteasy.spi.ResteasyProviderFactory.addContextResolver(ResteasyProviderFactory.java:1114)
	at org.jboss.resteasy.spi.ResteasyProviderFactory.registerProviderInstance(ResteasyProviderFactory.java:1808)
	... 26 more

      This seems to be because org.jboss.resteasy.util.Types#findInterfaceParameterizedTypes
      doesnt work with lambdas.

      I would have liked to submit a patch too, but that doesn't seem very trivial.

      E.g. https://github.com/jhalterman/typetools/blob/master/src/main/java/net/jodah/typetools/TypeResolver.java

      tries to resolve the generic type argument of a lambda.

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          is duplicated by

          Bug - A problem that impairs or prevents the functions of the product. RESTEASY-1725 Registering lambda context resolver results in ArrayIndexOutOfBoundsException

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Resolved

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            People

              rsigal@redhat.com Ronald Sigal
              mihxil Michiel Meeuwissen (Inactive)
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              Dates

                Created:
                Updated: