-Updated methods

MappingState.getMaximumCommonSubGraphs()
DivideAndConquerMatcher.getMaximumStates()
to keep all the mappings with a size equal
to max and max-1

This is a fix for the following case found in project JFreeChart-1.0.10
org.jfree.chart.plot.PiePlot3D.draw(Graphics2D,Rectangle2D,Point2D,PlotState,PlotRenderingInfo):void	lines 255-265
org.jfree.chart.plot.PiePlot.drawPie(Graphics2D,Rectangle2D,PlotRenderingInfo):void	lines 2320-2331

Before the fix statements were mapped as follows
21   double igy1 = plotArea.getY() + vGap;
13   double igy2 = plotArea.getMaxY() - vGap;

22   double igy2 = plotArea.getMaxY() - vGap;
12   double igy1 = plotArea.getY() + vGap;

-Fix in ExtractCloneRefactoring to handle properly void return types

-Fixed modifyExtractedFieldAssignmentsInSourceClass()
to handle qualifiedNames in which the rightmost part
is an extracted field.

-Fixed the naming of the getter and setter methods
created for the extracted fields, when an extracted method has the same name.
Extracted constants for "set" and "get" literals.

src/gr/uom/java/ast/decomposition/cfg/mapping/DivideAndConquerMatcher.java

@@ -1615,7 +1615,7 @@ private List<MappingState> getMaximumStates(List<MappingState> currentStates) {
 		for(MappingState currentState : currentStates) {
 			if(currentState.getSize() > max) {
 				max = currentState.getSize();
-				maximumStates.clear();
+				clear(maximumStates, max);
 				maximumStates.add(currentState);
 			}
 			else if(currentState.getSize() == max) {
@@ -1643,4 +1643,15 @@ else if(currentState.getDistinctDifferenceCount() == minimum) {
 		}
 		return maximumStatesWithMinimumDifferences;
 	}
+
+	private void clear(List<MappingState> maximumStates, int max) {
+		List<MappingState> keepStates = new ArrayList<MappingState>();
+		for(MappingState state : maximumStates) {
+			if(state.getSize() == max-1) {
+				keepStates.add(state);
+			}
+		}
+		maximumStates.clear();
+		maximumStates.addAll(keepStates);
+	}
 }

src/gr/uom/java/ast/decomposition/cfg/mapping/MappingState.java

@@ -185,7 +185,7 @@ public List<MappingState> getMaximumCommonSubGraphs() {
 		for(MappingState state : leaves) {
 			if(state.getSize() > max) {
 				max = state.getSize();
-				maximumStates.clear();
+				clear(maximumStates, max);
 				maximumStates.add(state);
 			}
 			else if(state.getSize() == max) {
@@ -196,6 +196,17 @@ else if(state.getSize() == max) {
 		return maximumStates;
 	}
 
+	private void clear(List<MappingState> maximumStates, int max) {
+		List<MappingState> keepStates = new ArrayList<MappingState>();
+		for(MappingState state : maximumStates) {
+			if(state.getSize() == max-1) {
+				keepStates.add(state);
+			}
+		}
+		maximumStates.clear();
+		maximumStates.addAll(keepStates);
+	}
+
 	private boolean containsSameState(List<MappingState> states, MappingState state) {
 		for(MappingState oldState : states) {
 			if(oldState.sameNodeMappings(state))