Warning! This method can work slowly for some forms of large patterns: the required time can be O(N), where N is the number of points (result of this method). In these cases, this method can also throw {@link TooManyPointsInPatternError}or OutOfMemoryError.
There is a guarantee, that if this object implements {@link QuickPointCountPattern} interface,then this method works very quickly (O(1) operations) and without exceptions.
There is a guarantee, that if this object implements {@link DirectPointSetPattern} interface,then the result of this method is not greater than Integer.MAX_VALUE.
Note: if this method returns some value greater than Integer.MAX_VALUE, it means that you cannot use {@link #points()} and {@link #roundedPoints()} methods,because Java Set object cannot contain more than Integer.MAX_VALUE elements. @return the number of {@link Point points} in this pattern. @throws TooManyPointsInPatternError for some forms of large patterns, if the number of points is greater thanInteger.MAX_VALUE or, in some rare situations, is near this limit (OutOfMemoryError can be also thrown instead of this exception). @see #largePointCount() @see #isSurelySinglePoint @see QuickPointCountPattern#isPointCountVeryLarge()
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