385 lines
15 KiB
C++
385 lines
15 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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//osgIntrospection - Copyright (C) 2005 Marco Jez
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#ifndef OSGINTROSPECTION_PROPERTYINFO_
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#define OSGINTROSPECTION_PROPERTYINFO_
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#include <osgIntrospection/Export>
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#include <osgIntrospection/Type>
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#include <osgIntrospection/MethodInfo>
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#include <osgIntrospection/Attributes>
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#include <string>
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#include <typeinfo>
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#include <iosfwd>
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#include <vector>
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namespace osgIntrospection
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{
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/// This class keeps information about a class' property. A property is
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/// defined by a name and a set of methods that store and retrieve
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/// values. When the user wants to "get" the value of a property, the
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/// getter method will be invoked and its value returned. When the user
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/// wants to "set" the value of a property, the setter method will be
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/// called. There are three kinds of property: simple (get/set), indexed
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/// (get[i1, i2, ...]/set[i1, i2, ...]), and array (count/add/get[i]/
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/// set[i]).
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/// Objects of class PropertyInfo can't be modified once they have been
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/// created, but they can be queried without restrictions. You can either
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/// retrieve the accessor methods and invoke them manually, or you can
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/// call getValue() / setValue() etc. methods to perform direct operations
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/// on the property, given an instance of the declaring type to work on.
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/// The latter technique is preferred because it checks for custom
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/// attributes associated to the PropertyInfo object and passes control
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/// to them when needed.
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///
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class OSGINTROSPECTION_EXPORT PropertyInfo: public CustomAttributeProvider
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{
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public:
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/// Direct initialization constructor for simple properties.
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/// You must pass the Type object associated to the class that
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/// declares the property, the Type object that describes the
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/// type of the property's value, the property name and the
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/// getter/setter methods. Either the setter or the getter can
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/// be null, meaning a restricted access. If both are null, the
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/// user is expected to add a custom accessor attribute to this
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/// PropertyInfo object.
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PropertyInfo(const Type& declaratiionType, const Type& ptype, const std::string& name, const MethodInfo* getm, const MethodInfo* setm, std::string briefHelp = std::string(), std::string detailedHelp = std::string())
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: CustomAttributeProvider(),
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_declarationType(declaratiionType),
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_ptype(ptype),
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_name(name),
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_getm(getm),
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_setm(setm),
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_numm(0),
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_addm(0),
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_insm(0),
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_remm(0),
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_is_array(false),
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_briefHelp(briefHelp),
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_detailedHelp(detailedHelp)
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{
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}
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/// Direct initialization constructor for "array" properties.
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/// You must pass the Type object associated to the type that
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/// declares the property, the Type object that describes the
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/// type of the property's value, the property name and the
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/// getter/setter/counter/adder/insert/remover methods.
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PropertyInfo(const Type& declaratiionType, const Type& ptype, const std::string& name, const MethodInfo* getm, const MethodInfo* setm, const MethodInfo* numm, const MethodInfo* addm, const MethodInfo* insm, const MethodInfo* remm, std::string briefHelp = std::string(), std::string detailedHelp = std::string())
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: CustomAttributeProvider(),
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_declarationType(declaratiionType),
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_ptype(ptype),
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_name(name),
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_getm(getm),
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_setm(setm),
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_numm(numm),
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_addm(addm),
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_insm(insm),
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_remm(remm),
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_is_array(true),
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_briefHelp(briefHelp),
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_detailedHelp(detailedHelp)
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{
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}
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/// Direct initialization constructor for indexed properties.
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/// You must pass the Type object associated to the class that
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/// declares the property, the Type object that describes the
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/// type of the property's value, the property name and the
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/// getter/setter methods. Either the setter or the getter can
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/// be null, meaning a restricted access. If both are null, the
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/// user is expected to add a custom accessor attribute to this
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/// PropertyInfo object.
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/// If the getter method has parameters, the property is considered
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/// to be indexed. The same is true if the getter is null and the
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/// setter has more than one parameter.
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PropertyInfo(const Type& declaratiionType, const Type& ptype, const std::string& name, const MethodInfo* getm, const MethodInfo* setm, const MethodInfo* remm, std::string briefHelp = std::string(), std::string detailedHelp = std::string())
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: CustomAttributeProvider(),
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_declarationType(declaratiionType),
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_ptype(ptype),
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_name(name),
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_getm(getm),
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_setm(setm),
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_numm(0),
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_addm(0),
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_insm(0),
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_remm(remm),
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_is_array(false),
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_briefHelp(briefHelp),
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_detailedHelp(detailedHelp)
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{
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if (_getm)
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{
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for (ParameterInfoList::size_type i=0; i<_getm->getParameters().size(); ++i)
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_indices.push_back(_getm->getParameters().at(i));
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}
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else
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{
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if (_setm)
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{
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for (ParameterInfoList::size_type i=0; i<(_setm->getParameters().size()-1); ++i)
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_indices.push_back(_setm->getParameters().at(i));
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}
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}
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}
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/// Returns the number of indices
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inline int getNumIndices() const
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{
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return static_cast<int>(getIndexParameters().size());
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}
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/// Returns the name of the property being described.
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inline virtual const std::string& getName() const
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{
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return _name;
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}
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/// Returns the brief help of the property being described.
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inline virtual const std::string& getBriefHelp() const
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{
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return _briefHelp;
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}
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/// Returns the detailed help of the property being described.
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inline virtual const std::string& getDetailedHelp() const
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{
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return _detailedHelp;
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}
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/// Returns the type that declares the property.
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inline virtual const Type& getDeclaringType() const
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{
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return _declarationType;
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}
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/// Returns the type of the reflected property.
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inline const Type& getPropertyType() const
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{
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const PropertyTypeAttribute *pta = getAttribute<PropertyTypeAttribute>(false);
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if (pta) return pta->getPropertyType();
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return _ptype;
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}
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/// Returns the getter method.
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inline const MethodInfo* getGetMethod() const
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{
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return _getm;
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}
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/// Returns the setter method.
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inline const MethodInfo* getSetMethod() const
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{
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return _setm;
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}
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/// Returns the counter method.
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inline const MethodInfo* getCountMethod() const
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{
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return _numm;
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}
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/// Returns the adder method.
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inline const MethodInfo* getAddMethod() const
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{
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return _addm;
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}
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/// Returns the insert method.
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inline const MethodInfo* getInsertMethod() const
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{
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return _insm;
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}
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/// Returns the remover method.
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inline const MethodInfo* getRemoveMethod() const
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{
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return _remm;
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}
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/// Returns whether the property's value can be retrieved.
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inline bool canGet() const
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{
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return (_getm != 0) || isDefined<CustomPropertyGetAttribute>(false);
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}
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/// Returns whether the property's value can be set.
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inline bool canSet() const
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{
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return _setm != 0 || isDefined<CustomPropertySetAttribute>(false);
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}
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/// Returns whether the property's array of values can be counted.
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inline bool canCount() const
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{
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return _numm != 0 || isDefined<CustomPropertyCountAttribute>(false);
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}
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/// Returns whether items can be added to the array property.
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inline bool canAdd() const
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{
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return _addm != 0 || isDefined<CustomPropertyAddAttribute>(false);
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}
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/// Returns whether items can be insert to the array property.
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inline bool canInsert() const
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{
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return _insm != 0 || isDefined<CustomPropertyInsertAttribute>(false);
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}
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/// Returns whether items can be removed from the array property.
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inline bool canRemove() const
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{
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return _remm != 0 || isDefined<CustomPropertyRemoveAttribute>(false);
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}
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/// Returns whether the property is simple.
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inline bool isSimple() const
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{
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return !isIndexed() && !isArray();
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}
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/// Returns whether the property is indexed.
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inline bool isIndexed() const
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{
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return getNumIndices() > 0;
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}
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/// Returns whether the property is an array.
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inline bool isArray() const
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{
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return _is_array;
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}
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/// Returns the list of index parameters.
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/// If the property is not indexed, this list is empty. If neither
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/// the get method nor the set method are defined, this list is
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/// empty unless a custom indexing attribute is defined.
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const ParameterInfoList& getIndexParameters() const;
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/// Returns a list of valid values that can be used for the specified
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/// index. If a custom indexing attribute is defined for this property,
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/// then it will be queried for the index set, otherwise the index
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/// will be treated as an enumeration and the set of enumeration
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/// values will be returned.
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void getIndexValueSet(int whichindex, const Value& instance, ValueList& values) const;
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/// Invokes the getter method on the given const instance and
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/// returns the property's value. If a custom getter attribute
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/// is defined, it will be invoked instead.
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Value getValue(const Value& instance) const;
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/// Invokes the getter method on the given instance and
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/// returns the property's value. If a custom getter attribute
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/// is defined, it will be invoked instead.
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Value getValue(Value& instance) const;
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/// Invokes the setter method on the given instance and
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/// sets the property's value. If a custom setter attribute
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/// is defined, it will be invoked instead.
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void setValue(Value& instance, const Value& value) const;
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/// Invokes the getter method on the given const instance passing a
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/// list of indices and returns the indexed property's value. If a
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/// custom getter attribute is defined, it will be invoked instead.
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Value getIndexedValue(Value& instance, ValueList& indices) const;
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/// Invokes the getter method on the given instance passing a list
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/// of indices and returns the indexed property's value. If a custom
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/// getter attribute is defined, it will be invoked instead.
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Value getIndexedValue(const Value& instance, ValueList& indices) const;
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/// Invokes the setter method on the given instance passing a list
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/// of indices and sets the indexed property's value. If a custom
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/// setter attribute is defined, it will be invoked instead.
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void setIndexedValue(Value& instance, ValueList& indices, const Value& value) const;
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/// Invokes the remover method on the given instance and removes
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/// an item from the indexed property. If a custom remover attribute
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/// is defined, it will be invoked instead.
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void removeIndexedItem(Value& instance, ValueList& indices) const;
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/// Invokes the counter method on the given instance and returns
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/// the number of items of the array property. If a custom counter
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/// attribute is defined, it will be invoked instead.
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int getNumArrayItems(const Value& instance) const;
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/// Invokes the getter method on the given const instance and returns
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/// the i-th item of the array property. If a custom getter attribute
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/// us defined, it will be invoked instead.
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Value getArrayItem(const Value& instance, int i) const;
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/// Invokes the getter method on the given instance and returns
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/// the i-th item of the array property. If a custom getter attribute
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/// us defined, it will be invoked instead.
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Value getArrayItem(Value& instance, int i) const;
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/// Invokes the setter method on the given instance and sets
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/// the i-th item of the array property. If a custom setter attribute
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/// is defined, it will be invoked instead.
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void setArrayItem(Value& instance, int i, const Value& value) const;
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/// Invokes the adder method on the given instance and adds
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/// an item to the array property. If a custom adder attribute is
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/// defined, it will be invoked instead.
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void addArrayItem(Value& instance, const Value& value) const;
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/// Invokes the insert method on the given instance and inserts
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/// an item to the array property after the i-th item of the array
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/// property. If a custom adder attribute is defined,
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/// it will be invoked instead.
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void insertArrayItem(Value& instance, int i, const Value& value) const;
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/// Invokes the remover method on the given instance and removes
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/// an item from the array property. If a custom remover attribute
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/// is defined, it will be invoked instead.
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void removeArrayItem(Value& instance, int i) const;
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/// Returns the default value associated to the reflected property.
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/// If no default value has been specified, this method tries to
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/// create an instance of the property type and then returns its
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/// value. There are some attributes that change the behavior of
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/// this method, for example NoDefaultValueAttribute.
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Value getDefaultValue() const;
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virtual ~PropertyInfo() {};
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protected:
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virtual void getInheritedProviders(CustomAttributeProviderList& providers) const;
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private:
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PropertyInfo& operator = (const PropertyInfo&) { return *this; }
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const Type& _declarationType;
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const Type& _ptype;
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std::string _name;
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const MethodInfo* _getm;
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const MethodInfo* _setm;
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const MethodInfo* _numm;
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const MethodInfo* _addm;
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const MethodInfo* _insm;
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const MethodInfo* _remm;
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ParameterInfoList _indices;
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bool _is_array;
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std::string _briefHelp;
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std::string _detailedHelp;
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};
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}
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#endif
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