I recently made some simple updates to Wish by using Java 1.5 generics and autoboxing/unboxing. Making Java source changes was the easy part, while the time consuming part was on hunting for information on Maven-related changes.
I started by changing maven-compiler-plugin source and target in pom.xml:
<build>
<plugins>
...
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
...
</plugins>
</build>
And got this error upon running mvn site
Caused by: net.sourceforge.pmd.ast.ParseException: Can't use generics unless running in JDK 1.5 mode!
which led me to change maven-pmd-plugin targetJdk:
<reporting>
<plugins>
...
<plugin>
<artifactId>maven-pmd-plugin</artifactId>
<configuration>
<targetJdk>1.5</targetJdk>
</configuration>
</plugin>
...
</plugins>
</reporting>
Then I found out that the angle brackets used by generics syntax resulted in checkstyle errors:
<' is not preceded with whitespace.
error <;' is not followed by whitespace.
error '>' is not preceded with whitespace.
which is fixed by
adding these modules to checkstyle.xml .
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