9039a1b4c5
JIRA: https://jira.spring.io/browse/INT-3859 The Java Mail `MessageCache.getMessageBySeqnum()` has the code: ````java if (msgnum < 0) { // XXX - < 1 ? if (logger.isLoggable(Level.FINE)) logger.fine("no message seqnum " + seqnum); return null; } ```` about which the `IMAPFolder.search` doesn't care: ````java matchMsgs[i] = getMessageBySeqNumber(matches[i]); ```` therefore pops `null`s to the top for the `ImapMailReceiver` * Fix `NPE` filtering the `Message[]` from `null` items Note: its enough difficult to reproduce it because it isn't clear how we can end up with: ````java if (seqnums[msgnum-1] > seqnum) break; // message doesn't exist ```` in the `MessageCache`. That's why there is no test-cases on the matter. **Cherry-pick to 4.1.x** Polishing - Only create a new array if needed. - Add a test case
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