| 1 | /* ======================================================================== *\
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| 2 | !
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| 3 | ! *
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| 4 | ! * This file is part of MARS, the MAGIC Analysis and Reconstruction
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| 5 | ! * Software. It is distributed to you in the hope that it can be a useful
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| 6 | ! * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
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| 7 | ! * It is distributed WITHOUT ANY WARRANTY.
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| 8 | ! *
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| 9 | ! * Permission to use, copy, modify and distribute this software and its
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| 10 | ! * documentation for any purpose is hereby granted without fee,
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| 11 | ! * provided that the above copyright notice appear in all copies and
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| 12 | ! * that both that copyright notice and this permission notice appear
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| 13 | ! * in supporting documentation. It is provided "as is" without express
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| 14 | ! * or implied warranty.
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| 15 | ! *
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| 16 | !
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| 17 | !
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| 18 | ! Author(s): Thomas Bretz 07/2001 (tbretz@uni-sw.gwdg.de)
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| 19 | !
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| 20 | ! Copyright: MAGIC Software Development, 2000-2001
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| 21 | !
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| 22 | !
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| 23 | \* ======================================================================== */
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| 24 |
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| 25 | /////////////////////////////////////////////////////////////////////////////
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| 26 | // //
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| 27 | // MFilter //
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| 28 | // //
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| 29 | // This is a base class which defines an interface to create your own //
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| 30 | // filters. To do it derive a class from MFilter. //
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| 31 | // //
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| 32 | // You can create two types of Filters: //
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| 33 | // - static Filters and //
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| 34 | // - dynamic Filters //
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| 35 | // //
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| 36 | // Static Filters: //
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| 37 | // A static filter is a filter which value doesn't change dynamically, //
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| 38 | // which mean only once while running through your tasklist. To create //
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| 39 | // a static filter override the Process-function of MFilter (this is //
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| 40 | // the function in which the filer-value should be updated). If //
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| 41 | // necessary you can also overwrite Pre-/PostProcess. The process //
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| 42 | // function should calculate the return value of IsExpressionTrue. //
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| 43 | // IsExpressionTrue should simply return this value. This kind of //
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| 44 | // filter must be added to the tasklist at a point which is forseen to //
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| 45 | // update the value of the filter (eg. after the reading task). //
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| 46 | // //
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| 47 | // Dynamic Filters: //
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| 48 | // A dynamic filter is a filter which returns a value which must be //
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| 49 | // calculated at the time the filter is called. To create such a //
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| 50 | // filter you have to overwrite IsExpressionTrue only. If there is //
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| 51 | // no need for a 'one-point' update this filter must not be added to //
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| 52 | // the tasklist. //
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| 53 | // //
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| 54 | // Usage: //
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| 55 | // A Filter is connected to a task by calling MTask::SetFilter. The //
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| 56 | // task is now executed when IsExpressionTrue returns a value //
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| 57 | // (different from kFALSE) only. //
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| 58 | // //
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| 59 | // Remarks: //
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| 60 | // - Make sure, that all tasks which depends on this filter are either //
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| 61 | // collected in a MTaskList-object or are conected to the same //
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| 62 | // filter. //
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| 63 | // - If you want to use different filters for one task please look for //
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| 64 | // the MFilterList class. //
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| 65 | // - Be careful, the return value of IsExpressionTrue is NOT a real //
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| 66 | // boolean. You can return other values, too. //
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| 67 | // //
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| 68 | /////////////////////////////////////////////////////////////////////////////
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| 69 |
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| 70 | #include "MFilter.h"
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| 71 |
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| 72 | ClassImp(MFilter);
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| 73 |
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| 74 | // --------------------------------------------------------------------------
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| 75 | //
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| 76 | Bool_t MFilter::IsExpressionTrue() const
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| 77 | {
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| 78 | return kTRUE;
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| 79 | }
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| 80 |
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| 81 | // --------------------------------------------------------------------------
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| 82 | //
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| 83 | Bool_t MFilter::PreProcess(MParList *pList)
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| 84 | {
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| 85 | return kTRUE;
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| 86 | }
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| 87 |
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| 88 | // --------------------------------------------------------------------------
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| 89 | //
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| 90 | Bool_t MFilter::Process()
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| 91 | {
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| 92 | return kTRUE;
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| 93 | }
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| 94 |
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| 95 | // --------------------------------------------------------------------------
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| 96 | //
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| 97 | Bool_t MFilter::PostProcess()
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| 98 | {
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| 99 | return kTRUE;
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| 100 | }
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