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ClassCastException in ResponseBodyEmitterReturnValueHandler.supportsReturnType(…) [SPR-12693] #17291

spring-issuemaster opened this issue Feb 5, 2015 · 0 comments


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commented Feb 5, 2015

Oliver Drotbohm opened SPR-12693 and commented

ResponseBodyEmitterReturnValueHandler.supportsReturnType(…) casts a previously looked up type argument to cast and thus will cause a ClassCastException in case the type argument is a parameterized in turn (e.g. using ResponseEntity<SomeParameterizedType<?>>).

ParameterizedType type = (ParameterizedType) paramType;
Type[] typeArguments = type.getActualTypeArguments();
if (typeArguments.length == 1) {
	return ResponseBodyEmitter.class.isAssignableFrom((Class<?>) typeArguments[0]);

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