This made ModuleTests.testBuildModuleAndApplyAspectsFromAspectPath fail
because a file delete job for a module JAR failed after a previous
compile job had called FileUtil.isZipFile(File) in which the opened zip
file was never closed. A try with resources fixes that.
Maybe the corresponding test worked on Linux before, I did not try. I
just know that Linux is more forgiving about deleting open files while
on Windows they are being locked, which makes Windows the better system
to search for open file leaks.
Signed-off-by: Alexander Kriegisch <Alexander@Kriegisch.name>
Reports on declarations of Collection variables made by using the collection class as the type, rather than an appropriate interface.
Signed-off-by: Lars Grefer <eclipse@larsgrefer.de>
Reports Collection.addAll() and Map.putAll() calls after instantiation of a collection using a constructor call without arguments. Such constructs can be replaced with a single call to a parametrized constructor which simplifies code. Also for some collections the replacement might be more performant.
Signed-off-by: Lars Grefer <eclipse@larsgrefer.de>
There are two styles to convert a collection to an array: either using a pre-sized array (like c.toArray(new String[c.size()])) or using an empty array (like c.toArray(new String[0]).
In older Java versions using pre-sized array was recommended, as the reflection call which is necessary to create an array of proper size was quite slow. However since late updates of OpenJDK 6 this call was intrinsified, making the performance of the empty array version the same and sometimes even better, compared to the pre-sized version. Also passing pre-sized array is dangerous for a concurrent or synchronized collection as a data race is possible between the size and toArray call which may result in extra nulls at the end of the array, if the collection was concurrently shrunk during the operation.
Signed-off-by: Lars Grefer <eclipse@larsgrefer.de>
Reports "unboxing", e.g. explicit unwrapping of wrapped primitive values. Unboxing is unnecessary under Java 5 and newer, and can be safely removed.
Signed-off-by: Lars Grefer <eclipse@larsgrefer.de>
'String.indexOf()' expression is replaceable with 'contains()'
Reports any String.indexOf() expressions which can be replaced with a call to the String.contains() method available in Java 5 and newer.
Signed-off-by: Lars Grefer <eclipse@larsgrefer.de>
Reports for loops which iterate over collections or arrays, and can be replaced with an enhanced for loop (i.e. the foreach iteration syntax).
Signed-off-by: Lars Grefer <eclipse@larsgrefer.de>