On 2 Apr 2014, at 10:54, Jochen Wiedmann <[email protected]> wrote:
> Hi,
>
> I am trying to binding a listener. My code looks like this:
>
> final InjectionListener<?> injectionListener = Generics.cast(new
> InjectionListener<ILifecycleListener>(){
> @Override
> public void afterInjection(ILifecycleListener pInjectee) {
> controller.addListener(pInjectee);
> }
> });
> final TypeListener typeListener = new TypeListener(){
> @Override
> public <I> void hear(TypeLiteral<I> pType, TypeEncounter<I>
> pEncounter) {
> @SuppressWarnings("unchecked")
> final InjectionListener<I> listener = (InjectionListener<I>)
> injectionListener;
> pEncounter.register(listener);
> }
> };
> final Matcher<TypeLiteral<?>> matcher =
> Generics.cast(Matchers.subclassesOf(ILifecycleListener.class));
> pBinder.bindListener(matcher, typeListener);
>
> However, I am getting the exception below. The reason seems to be with
> Matchers.subclassesOf(), because my example works, if I use Matchers.any().
>
> Any ideas, what might be wrong?
Matchers.subclassesOf matches instances of Class but you're using it to match
instances of TypeLiteral, and Class != TypeLiteral
You'll need to provide your own Matcher implementation that works with
TypeLiteral like the following example from a comment on the CustomInjections
page of the wiki:
https://code.google.com/p/google-guice/wiki/CustomInjections
http://pastie.org/1064618
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
import com.google.inject.TypeLiteral;
import com.google.inject.matcher.AbstractMatcher;
import com.google.inject.matcher.Matcher;
/**
* A factory of {@link Matcher}s that can be used in
* {@link AbstractModule}.bindListener(matcher,listener)
* @author ooktay
*/
public class TypeMatchers {
private static class SubClassesOf extends AbstractMatcher<TypeLiteral<?>> {
private final Class<?> baseClass;
private SubClassesOf(Class<?> baseClass) {
this.baseClass = baseClass;
}
@Override
public boolean matches(TypeLiteral<?> t) {
return baseClass.isAssignableFrom( t.getRawType() );
}
}
/**
* Matcher matches all classes that extends, implements or is the same as
baseClass
* @param baseClass
* @return Matcher
*/
public static Matcher<TypeLiteral<?>> subclassesOf(Class<?> baseClass) {
return new SubClassesOf(baseClass);
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Thanks,
>
> Jochen
>
>
> com.google.inject.internal.util.$ComputationException:
> com.google.inject.internal.util.$ComputationException:
> java.lang.ClassCastException: com.google.inject.TypeLiteral cannot be cast to
> java.lang.Class
> at
> com.google.inject.internal.util.$MapMaker$StrategyImpl.compute(MapMaker.java:553)
> at
> com.google.inject.internal.util.$MapMaker$StrategyImpl.compute(MapMaker.java:419)
> at
> com.google.inject.internal.util.$CustomConcurrentHashMap$ComputingImpl.get(CustomConcurrentHashMap.java:2041)
> at com.google.inject.internal.FailableCache.get(FailableCache.java:50)
> at
> com.google.inject.internal.ConstructorInjectorStore.get(ConstructorInjectorStore.java:49)
> at
> com.google.inject.internal.ConstructorBindingImpl.initialize(ConstructorBindingImpl.java:125)
> at
> com.google.inject.internal.InjectorImpl.initializeJitBinding(InjectorImpl.java:521)
> at
> com.google.inject.internal.InjectorImpl.createJustInTimeBinding(InjectorImpl.java:847)
> at
> com.google.inject.internal.InjectorImpl.createJustInTimeBindingRecursive(InjectorImpl.java:772)
> at
> com.google.inject.internal.InjectorImpl.getJustInTimeBinding(InjectorImpl.java:256)
> at
> com.google.inject.internal.InjectorImpl.getBindingOrThrow(InjectorImpl.java:205)
> at
> com.google.inject.internal.InjectorImpl.getInternalFactory(InjectorImpl.java:853)
> at com.google.inject.internal.FactoryProxy.notify(FactoryProxy.java:46)
> at
> com.google.inject.internal.ProcessedBindingData.runCreationListeners(ProcessedBindingData.java:50)
> at
> com.google.inject.internal.InternalInjectorCreator.initializeStatically(InternalInjectorCreator.java:133)
> at
> com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:106)
> at com.google.inject.Guice.createInjector(Guice.java:95)
> at com.google.inject.Guice.createInjector(Guice.java:72)
> at com.google.inject.Guice.createInjector(Guice.java:62)
> at
> com.github.jochen.afw.core.guice.GuiceComponentFactoryBuilder.build(GuiceComponentFactoryBuilder.java:144)
> at
> com.github.jochen.afw.core.guice.GuiceComponentFactoryBuilderTest.testSuccessfullConfiguration(GuiceComponentFactoryBuilderTest.java:20)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
> at
> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
> at
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
> Caused by: com.google.inject.internal.util.$ComputationException:
> java.lang.ClassCastException: com.google.inject.TypeLiteral cannot be cast to
> java.lang.Class
> at
> com.google.inject.internal.util.$MapMaker$StrategyImpl.compute(MapMaker.java:553)
> at
> com.google.inject.internal.util.$MapMaker$StrategyImpl.compute(MapMaker.java:419)
> at
> com.google.inject.internal.util.$CustomConcurrentHashMap$ComputingImpl.get(CustomConcurrentHashMap.java:2041)
> at com.google.inject.internal.FailableCache.get(FailableCache.java:50)
> at
> com.google.inject.internal.MembersInjectorStore.get(MembersInjectorStore.java:65)
> at
> com.google.inject.internal.ConstructorInjectorStore.createConstructor(ConstructorInjectorStore.java:73)
> at
> com.google.inject.internal.ConstructorInjectorStore.access$000(ConstructorInjectorStore.java:28)
> at
> com.google.inject.internal.ConstructorInjectorStore$1.create(ConstructorInjectorStore.java:36)
> at
> com.google.inject.internal.ConstructorInjectorStore$1.create(ConstructorInjectorStore.java:32)
> at com.google.inject.internal.FailableCache$1.apply(FailableCache.java:39)
> at
> com.google.inject.internal.util.$MapMaker$StrategyImpl.compute(MapMaker.java:549)
> ... 43 more
> Caused by: java.lang.ClassCastException: com.google.inject.TypeLiteral cannot
> be cast to java.lang.Class
> at
> com.google.inject.matcher.Matchers$SubclassesOf.matches(Matchers.java:187)
> at
> com.google.inject.internal.MembersInjectorStore.createWithListeners(MembersInjectorStore.java:100)
> at
> com.google.inject.internal.MembersInjectorStore.access$000(MembersInjectorStore.java:34)
> at
> com.google.inject.internal.MembersInjectorStore$1.create(MembersInjectorStore.java:42)
> at
> com.google.inject.internal.MembersInjectorStore$1.create(MembersInjectorStore.java:39)
> at com.google.inject.internal.FailableCache$1.apply(FailableCache.java:39)
> at
> com.google.inject.internal.util.$MapMaker$StrategyImpl.compute(MapMaker.java:549)
> ... 53 more
>
>
>
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