| 1 | /*
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| 2 | * Project: MoleCuilder
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| 3 | * Description: creates and alters molecular systems
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| 4 | * Copyright (C) 2010 University of Bonn. All rights reserved.
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| 5 | * Please see the LICENSE file or "Copyright notice" in builder.cpp for details.
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| 6 | */
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| 7 |
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| 8 | /**
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| 9 | * \file code.dox
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| 10 | *
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| 11 | * Created on: Oct 28, 2011
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| 12 | * Author: heber
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| 13 | */
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| 14 |
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| 15 | /**
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| 16 | * \page code How to use and extend the code
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| 17 | *
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| 18 | * \section code-introduction How to understand the code
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| 19 | *
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| 20 | * \subsection code-introduction-whats-there What's there already ...
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| 21 | *
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| 22 | * Generally, you will begin by having to add a certain Action to the code.
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| 23 | * Refer to the \ref constructs and (at the very least briefly) go through
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| 24 | * all the stuff that is already there. This should give you an idea of what
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| 25 | * you do not have to re-invent!
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| 26 | *
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| 27 | * As soon as you have decided upon all the little things required for your
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| 28 | * Action, e.g. you need a LinkedCell construct because of nearest neighbor,
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| 29 | * additionally you need access to BondGraph because you need bond distance
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| 30 | * information, you want to know how to access and use each of these.
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| 31 | *
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| 32 | * \subsection code-introduction-whats-not-there What's not there ...
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| 33 | *
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| 34 | * Not everything is always documented, not everything is always up-to-date.
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| 35 | * Search the code or try to look at Actions that are similar to what you
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| 36 | * intent. Try to understand what they do, how they achieve it and whever your
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| 37 | * ideas really can't be realized with the current capabilities of the code
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| 38 | * already.
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| 39 | *
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| 40 | * If not, it gets more complicated because if one extends the code, one can
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| 41 | * proceed in a straight-forward and soon-to-reach-the-goal way or one can
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| 42 | * try to realize if one's not generalizing a concept already present and
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| 43 | * implement this generalization (and also bring what's already there up to
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| 44 | * speed with this new implementation). Of course, before this "refactoring"
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| 45 | * (http://en.wikipedia.org/wiki/Code_refactoring) one should have tests in
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| 46 | * place that safeguard that the old functionality remains the same, see
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| 47 | * \ref tests. From this generalization your concept should then be easier
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| 48 | * to implement.
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| 49 | *
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| 50 | * Last but not least, see \ref future for what some of the areas are where
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| 51 | * the code needs extension or refactorization. Maybe somethings close to what
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| 52 | * you want and you could do it along the way, at the same time getting to
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| 53 | * know the code better?
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| 54 | *
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| 55 | * \section code-howto-use How to use the code
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| 56 | *
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| 57 | * There are two things that should make it easy for you to get to know the
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| 58 | * constructs, i.e. classes, required for your Action besides the documentation
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| 59 | * and serve as tiny examples on how to use them:
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| 60 | * - unit tests
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| 61 | * - regression tests
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| 62 | *
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| 63 | * \subsection code-howto-use-unit-tests Unit tests
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| 64 | *
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| 65 | * Unit tests give you an idea how to use a specific constructs, e.g. they
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| 66 | * tell you where to get it (simply \code new LinkedCell \endcode, or rather
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| 67 | * \code World::getInstance().getBondGraph() \endcode, because it's a unique
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| 68 | * instance) and how to use them because that's exactly what's being tested
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| 69 | * there. Just browse through the various test functions implemented in
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| 70 | * each of the unit tests or rather the unit tests to the constructs you need.
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| 71 | *
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| 72 | * \subsection code-howto-use-regression-tests Regression tests
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| 73 | *
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| 74 | * Regression tests (\ref tests-regressiontests) give you an idea how your
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| 75 | * Action eventually can be called (from the command line), what to put in your
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| 76 | * \b .def file and how it ends up being the option you have to give.
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| 77 | *
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| 78 | * \attention Never forget that you are supposed to add a regression test for
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| 79 | * your new Action as well, either right now (http://en.wikipedia.org/wiki/Test-driven_development)
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| 80 | * or at the very latest once its finished.
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| 81 | *
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| 82 | * \subsection code-howto-use-last Last but not least
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| 83 | *
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| 84 | * Search the code with the desired construct as keyword to find out places
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| 85 | * where it is internally used, see how it is done there and do the same
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| 86 | * in your own Action.
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| 87 | *
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| 88 | * \section code-introduction-howto-extend How to extend the code
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| 89 | *
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| 90 | * Once you're certain your requirements are not met, new classes have to be
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| 91 | * added. Do some careful thinking whether you add something altogether new or
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| 92 | * whether it's already present in some simpler or slightly other form. In the
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| 93 | * latter case, try to generalize what's present and build from there. E.g.
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| 94 | * FormatParserParameters have been generalized from a simpler implementation
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| 95 | * that was just used for the parameters for MpqcParser (know FormatParser<mpqc>
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| 96 | * which has been refactored as well). Don't always go all the way, but extend
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| 97 | * and generalize when it makes sense, especially when the code is much easier
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| 98 | * to use afterwards or just much more powerful (with immediate consequences).
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| 99 | *
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| 100 | * Again, refer to \ref future to know what's already on the schedule, i. e.
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| 101 | * what's already marked for extension or refactoring.
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| 102 | *
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| 103 | * \section code-reference Further readings
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| 104 | *
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| 105 | * \li \ref faq
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| 106 | * \li \ref constructs
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| 107 | * \li \ref howto
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| 108 | *
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| 109 | *
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| 110 | * \date 2014-03-10
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| 111 | *
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| 112 | */
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