Abstract
The Filter Design pattern describes how objects can intercept requests for a target object and carry out some activity before the target object receives that request. In general a Filter will pass the request onto the next object in the filter chain. If that object is another filter this object can also perform some processing on the request etc. until the target object is reached. In this pattern the target object is unaware of the presence of the filters. Once the target object returns a response, that response may also be processed by the filter in the chain (in reverse order).
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Reference
Buschmann, F., Meunier, R., Rohnert, H., Sommerlad, P., & Stal, M. (1996). Pattern-oriented software architecture – A system of patterns. New York: Wiley. ISBN 0-471-95869-7.
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© 2013 Springer International Publishing Switzerland
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Hunt, J. (2013). Filter. In: Scala Design Patterns. Springer, Cham. https://doi.org/10.1007/978-3-319-02192-8_26
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DOI: https://doi.org/10.1007/978-3-319-02192-8_26
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Publisher Name: Springer, Cham
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Online ISBN: 978-3-319-02192-8
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