An interface for classes which process the coordinates in a {link CoordinateSequence}. A filter can either record information about each coordinate, or change the value of the coordinate. Filters can be used to implement operations such as coordinate transformations, centroid and envelope computation, and many other functions. {link Geometry} classes support the concept of applying a CoordinateSequenceFilter to each {link CoordinateSequence}s they contain.

For maximum efficiency, the execution of filters can be short-circuited by using the {link #isDone} method.

CoordinateSequenceFilter is an example of the Gang-of-Four Visitor pattern.

Note: In general, it is preferable to treat Geometrys as immutable. Mutation should be performed by creating a new Geometry object (see {link GeometryEditor} and {link GeometryTransformer} for convenient ways to do this). An exception to this rule is when a new Geometry has been created via {link Geometry#copy()}. In this case mutating the Geometry will not cause aliasing issues, and a filter is a convenient way to implement coordinate transformation.