2 * This file is part of the GROMACS molecular simulation package.
4 * Copyright (c) 2010,2011,2012,2014,2015,2016,2019, by the GROMACS development team, led by
5 * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
6 * and including many others, as listed in the AUTHORS file in the
7 * top-level source directory and at http://www.gromacs.org.
9 * GROMACS is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public License
11 * as published by the Free Software Foundation; either version 2.1
12 * of the License, or (at your option) any later version.
14 * GROMACS is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with GROMACS; if not, see
21 * http://www.gnu.org/licenses, or write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 * If you want to redistribute modifications to GROMACS, please
25 * consider that scientific software is very special. Version
26 * control is crucial - bugs must be traceable. We will be happy to
27 * consider code for inclusion in the official distribution, but
28 * derived work must not be called official GROMACS. Details are found
29 * in the README & COPYING files - if they are missing, get the
30 * official version at http://www.gromacs.org.
32 * To help us fund GROMACS development, we humbly ask that you cite
33 * the research papers on the package. Check out http://www.gromacs.org.
35 /*! \libinternal \file
37 * Declares gmx::AbstractOptionStorage.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
41 * \ingroup module_options
43 #ifndef GMX_OPTIONS_ABSTRACTOPTIONSTORAGE_H
44 #define GMX_OPTIONS_ABSTRACTOPTIONSTORAGE_H
49 #include "gromacs/utility/classhelpers.h"
51 #include "optionflags.h"
61 /*! \libinternal \brief
62 * Abstract base class for converting, validating, and storing option values.
64 * This class should normally not be subclassed directly, but the
65 * OptionStorageTemplate should be used instead. The templated class provides
66 * basic functionality for most of the pure virtual methods, and also
67 * integrates well with option setting objects derived from OptionTemplate.
70 * \ingroup module_options
73 * This class really consists of two parts: the public interface that is
74 * used by the internal implementation of the options module, and the
75 * interface that derived classes use to provide type-dependent functionality.
76 * The latter consists of a few pure virtual methods, of which a few simple
77 * query methods are also part of the module-internal interface, others are
78 * protected and called by the non-virtual methods when needed.
79 * The reason why these two roles are in one class is twofold:
80 * -# Both the derived classes and the internal module implementation may need
81 * access to the same information like the allowed number of values and the
83 * -# Having only one class is consistent with the structure used for options
84 * settings objects: there is very direct correspondence between
85 * AbstractOption and AbstractOptionStorage and between OptionTemplate and
86 * OptionStorageTemplate.
88 class AbstractOptionStorage
91 virtual ~AbstractOptionStorage();
93 //! Returns true if the option has been set.
94 bool isSet() const { return hasFlag(efOption_Set); }
96 * Returns true if the option is a boolean option.
98 * This is used to optionally support an alternative syntax where an
99 * option provided with no value sets the value to true and an
100 * option prefixed with "no" clears the value.
102 bool isBoolean() const;
103 //! Returns true if the option is a hidden option.
104 bool isHidden() const { return hasFlag(efOption_Hidden); }
105 //! Returns true if the option is required.
106 bool isRequired() const { return hasFlag(efOption_Required); }
107 //! Returns true if the option is vector-valued.
108 bool isVector() const { return hasFlag(efOption_Vector); }
109 //! Returns the name of the option.
110 const std::string& name() const { return name_; }
111 //! Returns the description of the option set by the calling code.
112 const std::string& description() const { return descr_; }
114 //! Returns true if defaultValueIfSet() value is specified.
115 bool defaultValueIfSetExists() const { return hasFlag(efOption_DefaultValueIfSetExists); }
116 //! Returns the minimum number of values required in one set.
117 int minValueCount() const { return minValueCount_; }
118 //! Returns the maximum allowed number of values in one set (-1 = no limit).
119 int maxValueCount() const { return maxValueCount_; }
122 * Returns an option info object corresponding to this option.
124 virtual OptionInfo& optionInfo() = 0;
126 * Returns a short string describing the type of the option.
128 virtual std::string typeString() const = 0;
130 * Formats additional description for the option.
132 * If this method returns a non-empty string, it is appended to the
133 * plain description when printing help texts.
134 * The default implementation returns an empty string.
136 virtual std::string formatExtraDescription() const { return std::string(); }
138 * Returns the number of option values added so far.
140 virtual int valueCount() const = 0;
141 //! \copydoc OptionInfo::defaultValues()
142 virtual std::vector<Any> defaultValues() const = 0;
143 //! \copydoc OptionInfo::defaultValuesAsStrings()
144 virtual std::vector<std::string> defaultValuesAsStrings() const = 0;
145 //! \copydoc OptionInfo::normalizeValues()
146 virtual std::vector<Any> normalizeValues(const std::vector<Any>& values) const = 0;
149 * Starts adding values from a new source for the option.
151 * This marks the vurrent value of the option as a default value,
152 * causing next call to startSet() to clear it. This allows values
153 * from the new source to overwrite old values.
155 * This method does not throw.
159 * Starts adding a new set of values for the option.
161 * \throws InvalidInputError if option is specified multiple times,
162 * but is not specified to accept it.
164 * If the parameter is specified multiple times, startSet() should be
165 * called before the values for each instance.
167 * Strong exception safety guarantee.
171 * Adds a new value for the option.
173 * \param[in] value Value to convert.
174 * \throws InvalidInputError if value cannot be converted, or
175 * if there are too many values.
177 * This method should only be called between startSet() and
180 void appendValue(const Any& value);
182 * Performs validation and/or actions once a set of values has been
185 * \throws InvalidInputError if too few values have been provided, or
186 * if the valid values since previous startSet() are invalid as a
189 * If the parameter is specified multiple times, finishSet() should be
190 * called after the values for each instance.
194 * Performs validation and/or actions once all values have been added.
196 * \throws InvalidInputError if the option is required but not set, or
197 * if all valid values together are invalid as a set.
199 * This method should be called after all values have been provided
200 * with appendValue().
206 * Initializes the storage object from the settings object.
208 * \param[in] settings Option settings.
209 * \param[in] staticFlags Option flags that are always set and specify
210 * generic behavior of the option.
211 * \throws APIError if invalid settings have been provided.
213 AbstractOptionStorage(const AbstractOption& settings, OptionFlags staticFlags);
215 //! Marks the option as set.
217 //! Returns true if the given flag is set.
218 bool hasFlag(OptionFlag flag) const { return flags_.test(flag); }
219 //! Sets the given flag.
220 void setFlag(OptionFlag flag) { return flags_.set(flag); }
221 //! Clears the given flag.
222 void clearFlag(OptionFlag flag) { return flags_.clear(flag); }
225 * Sets a new minimum number of values required in one set.
227 * \param[in] count New minimum number of values (must be > 0).
228 * \throws InvalidInputError if already provided values violate the limit.
230 * If values have already been provided, it is checked that there are
233 * Cannot be called for options with ::efOption_MultipleTimes set,
234 * because it is impossible to check the requirement after the values
236 * If attempted, will assert.
238 void setMinValueCount(int count);
240 * Sets a new maximum number of values required in one set.
242 * \param[in] count New maximum number of values
243 * (must be > 0, or -1 for no limit).
244 * \throws InvalidInputError if already provided values violate the limit.
246 * If values have already been provided, it is checked that there are
249 * Cannot be called for options with ::efOption_MultipleTimes set,
250 * because it is impossible to check the requirement after the values
252 * If attempted, will assert.
254 void setMaxValueCount(int count);
257 * Removes all values from temporary storage for a set.
259 * This function is always called before starting to add values to
260 * a set, allowing the storage to clear its internal buffers.
264 virtual void clearSet() = 0;
268 * \param[in] value Value to convert.
269 * \throws InvalidInputError if \p value is not valid for this option
270 * or if there have been too many values in the set.
272 * This method may be called multiple times if the underlying
273 * option is defined to accept multiple values.
275 * \see OptionStorageTemplate::convertValue()
277 virtual void convertValue(const Any& value) = 0;
279 * Performs validation and/or actions once a set of values has been
282 * \throws InvalidInputError if the values in the set are not valid
285 * This method may be called multiple times if the underlying option
286 * can be specified multiple times.
287 * This method is not currently called if one of the convertValue()
291 * Improve the call semantics.
293 * \see OptionStorageTemplate::processSetValues()
295 virtual void processSet() = 0;
297 * Performs validation and/or actions once all values have been added.
299 * \throws InvalidInputError if all provided values are not valid as
302 * This method is always called once.
304 * If the method throws, implementation should take care to leave the
305 * option in a consistent, meaningful state. However, currently none
306 * of the implementations actually throw in any situation where the
307 * option may be left in an inconsistent state.
309 virtual void processAll() = 0;
314 //! Flags for the option.
317 //! Minimum number of values required (in one set).
319 //! Maximum allowed number of values (in one set), or -1 if no limit.
321 //! Whether we are currently assigning values to a set.
323 //! Whether there were errors in set values.
324 bool bSetValuesHadErrors_;
326 GMX_DISALLOW_COPY_AND_ASSIGN(AbstractOptionStorage);