HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.

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Design Patterns and XSPEC
Redesign Home Design Patterns Coding Idioms Classes
Creational

Structural

Behavioral

Design patterns can be thought of as software architectural features that solve particular engineering problems. The standard work on the subject, Design Patterns (Gamma, Helm, Johnson & Vlissides —sometimes referred to as the Gang of Four— 1994) lists 23 separate patterns divided into Creational, Structural and Behavioral patterns. XSPEC12 uses about ten of them. We describe briefly below what specific use each pattern has  and the issue within XSPEC12 that it addresses. We follow the definition of a pattern given in Gamma et al. with concrete examples from our code.


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Last modified: Wednesday, 02-Mar-2011 11:22:50 EST

HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.