java - Transformer not accepting Message as the input -

i've begun migrating java dsl we've used our project java 7 8, , i'm facing weird issues. have success channel expressionevaluatingrequesthandleradvice expecting advicemessage. in java 7 version, working fine with:

.transform(new generictransformer<advicemessage, message<?>>() {     @override     public message<?> transform(advicemessage source) {         return source.getinputmessage();     } }) 

but when convert java 8:

.<advicemessage, message<?>>transform(advice -> advice.getinputmessage()) 

it gives me exception:

org.springframework.integration.handler.advice.expressionevaluatingrequesthandleradvice$ messagehandlingexpressionevaluatingadviceexception: handler failed; nested exception org.springframework.integration.transformer.messagetransformationexception: failed transform message; nested exception org.springframework.messaging.messagehandlingexception: nested exception java.lang.classcastexception: java.lang.boolean cannot cast org.springframework.integration.message.advicemessage

boolean result of success expression had given turns out method expecting payload , not letting me hold of whole message.

when tried change other parts of flow error consistently started popping wherever i've tried put generic argument expecting message<?> instead of payload of message.

i can't figure out if i'm doing of java 8 syntax wrong, or error due else entirely, since java 7 version working perfectly.

i couldn't find java dsl examples on web there generic casts message instead of payload, don't know if it's supposed work.

thanks help.

that problem of genetics erasure. since 1 becomes object, don't have choice unless try extract payload message, because common use-case.

to fix concern have use overload.transform() version advicemesaage.class first argument.

that way know expected type , can make method invocation proper argument call.