Timeline for removing deprecated classes

[hanslovsky]

Some classes in imglib2-algorithm are labeled deprecated, e.g. net.imglib2.algorithm.gauss.Gauss. Do we have a timeline for when they should be removed? This should certainly happen before a 1.0.0 release as the zero major version still indicates a fluid API. My thought on this is that this should happen sooner rather than later because multiple classes (some of which are deprecated) with similar functionality can be confusing for callers, for example #59. Also, the sooner deprecated methods disappear, the sooner people stop building their software on top of them.

[tpietzsch]

Gauss we can certainly remove. It's been deprecated for years.
In general, I'm for removing everything for which there is already a replacement.

[hanslovsky]

I will compile a list of all deprecated classes/method (and replacements, if any).

[hanslovsky]

package	class	what	replacement	in use within imglib2-algorithm
net.imglib2.algorithm.integral	ScaleAreaAveraging2d	two constructors	N/A	no
net.imglib2.algorithm.labeling	AllConnectedComponents	whole class	ConnectedComponents, ConnectedComponentsAnalysis (PR)	net.imglib2.algorithm.labeling.Watershed
net.imglib2.algorithm.region.localneighborhood.old	all classes	whole class	net.imglib2.algorithm.neighborhood	no/only within deprecated package
net.imglib2.algorithm.gauss	all but AbstractGauss	whole class	net.imglib2.algorithm.gauss3	no/only within deprecated package
net.imglib2.multithreading	all classes	whole class	N/A	yes
net.imglib2.algorithm.localextrema	LocalExtrema	findLocalExtrema( RandomAccessibleInterval, LocalNeighborhoodCheck, ExecutorService )	yes within same class	yes
net.imglib2.algorithm.fill	all	all helper interfaces and old unintuitive interfaces in FloodFill	yes within same class	no

I suggest removing

• net.imglib2.algorithm.integral.ScaleAreaAveraging2d constructors
• net.imglib2.algorithm.region.localneighborhood.old
• net.imglib2.algorithm.gauss

I somehow missed the @Deprecated tag in LocalExtrema. Added to the list. The only use within imglib2-algorithm is inside DogDetection.

I also added all classes relevant for FloodFill after the merge of #58. I would like to remove those but it feels somewhat wrong because they were deprecated just now.