2c3ee7d68c
If there is `json`-aware `contentType` header in the message to process and payload type is `String` or `byte[]` and it isn't equal to the expected exclusive method argument type (even generic from the `Message<>`), the conversion should happen only if SpelInvoker is no method. The regular `InvocableHandlerMethod` takes care about payload conversion via configured `MessageConverter` in the `PayloadArgumentResolver` * Fix `MessagingMethodInvokerHelper` to call JSON conversion only when `this.handlerMethod.spelOnly` NOTE: We can't do generics conversion right now because it is going to be a breaking change around `org.springframework.integration.support.json.JsonObjectMapper` property in the `MessagingMethodInvokerHelper`. We can do that only in `5.1` and rely there only on the functionality from the Jackson Object mapper * Convert from JSON only in the `invokeExpression()` * Optimize message recreation only if target param type is `Message`. Otherwise override just `payload` property of the `ParametersWrapper`
Spring Integration 
Checking out and Building
To check out the project and build from source, do the following:
git clone git://github.com/spring-projects/spring-integration.git
cd spring-integration
./gradlew build
NOTE: While Spring Integration runs with Java SE 6 or higher, a Java 8 compiler is required to build the project.
If you encounter out of memory errors during the build, increase available heap and permgen for Gradle:
GRADLE_OPTS='-XX:MaxPermSize=1024m -Xmx1024m'
To build and install jars into your local Maven cache:
./gradlew install
To build api Javadoc (results will be in build/api):
./gradlew api
To build reference documentation (results will be in build/reference):
./gradlew reference
To build complete distribution including -dist, -docs, and -schema zip files (results will be in build/distributions)
./gradlew dist
Using Eclipse
To generate Eclipse metadata (.classpath and .project files), do the following:
./gradlew eclipse
Once complete, you may then import the projects into Eclipse as usual:
File -> Import -> Existing projects into workspace
Browse to the 'spring-integration' root directory. All projects should import free of errors.
Using IntelliJ IDEA
To generate IDEA metadata (.iml and .ipr files), do the following:
./gradlew idea
Resources
For more information, please visit the Spring Integration website at: http://projects.spring.io/spring-integration