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 the copying of array contents to a collection where each element is added individually using a for loop. Such constructs may be replaced by a call to Collection.addAll(Arrays.asList()) or Collections.addAll().
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>
Some enhancements discovered whilst working on bugzilla bug 78954: Compiler cannot cope with 4000 jars on the classpath. These enhancements cause things to be done 'lazily' in BCEL.
Adding BCEL src to bcel-builder project. We change/patch BCEL more frequently than we import new versions of BCEL into AspectJ - so it makes sense to make that patching process easier than the importing process. Also the Java5 support would result in an unwieldy patch.txt file.
The ANT targets in build.xml will still enable transformation of the packaging from org.aspectj.apache to org.apache for diffing with a new BCEL version, should one ever appear.