OpenSceneGraph/include/osgIntrospection/Converter

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2006-07-18 23:21:48 +08:00
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2005-04-29 18:06:50 +08:00
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
//osgIntrospection - Copyright (C) 2005 Marco Jez
#ifndef OSGINTROSPECTION_CONVERTER_
#define OSGINTROSPECTION_CONVERTER_
#include <osgIntrospection/Value>
From David Callu, " Found in the join file the fix for the bug found by Rafa. Problem : osgIntrospection::Value grp(new osg::Group); osgIntrospection::ValueList vlcall; vlcall.push_back(osgIntrospection::Value("toto")); const osgIntrospection::MethodInfo *m = grp->getType.getCompatibleMethod("setName", vlcall, true); if (m) { m->invoke(grp, vlcall); // ** SEGFAULT here } Algorithm explanation : The "invoke" method try to convert "grp", which reflect an "osg::Group*", in a "osgIntrospection::Value", which reflect a "osg::Node*". This because the "setName(const char *)" method found by "grp->getType.getCompatibleMethod" is an "osg::Object" type method. When osgIntrospection do this conversion it try : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" - to converte an Enum to int or unsigned int - to convert the value in its "value string representation", then converte this string in the destination value Else it throw a "TypeConversionException". Bug : 1) When osgIntrospection try to found a chain of "osgIntrospection::Converter" It could do any downcast or (Type to SuperType) or upcast (SuperType to Type). This mean the the chain could be : osg::Group to osg::Transform to osg::Camera to osg::CullSettings to osg::CullStack to osg::CollectOccludersVisitor to osg::NodeVisitor to osg::Referenced to osg::Object During the convertion with this chain, A METTRE failed and the pointer in "grp" is set NULL. But the "grp" is always a valid "osgIntrospection::Value" and so, osgIntrospection accept the conversion. Then it try to use this pointer to call the "setName" function. And Bing SEGFAULT. 2) In "bool Reflection::accum_conv_path( ... )" the convection path isn't accumulate in the recursive loop. this cause multi request of a conversion path, and a slowdown in the conversion algorithm. 3) Use of the last conversion way in a conversion from pointer to pointer this mean you can do this : "osg::Node*" to " value string representation" to "osg::Material*" What a bad thing !!! Solution : 1) Introduce the concept of dynamic_cast and static_cast. now, to do a conversion, osgIntrospection does this : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with static_cast, downcast (Type to SuperType) - to found, if the source and the destination are two pointer, a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with dynamic_cast, upcast (SuperType to Type) - to convert an Enum to int or to unsigned int - to convert the value in its "value string representation", then convert this string in the destination value Else it throw a "TypeConversionException". Add the "enum CastType" to distinguish the static_cast or dynamic_cast converter. Add file OpenSceneGraph/include/osgIntrospection/CastType 2) add a line to accumulate converter in converter Path. 3) add a line to check if source and destination are pointer. "
2007-06-30 22:21:34 +08:00
#include <list>
namespace osgIntrospection
{
struct Converter
{
From David Callu, " Found in the join file the fix for the bug found by Rafa. Problem : osgIntrospection::Value grp(new osg::Group); osgIntrospection::ValueList vlcall; vlcall.push_back(osgIntrospection::Value("toto")); const osgIntrospection::MethodInfo *m = grp->getType.getCompatibleMethod("setName", vlcall, true); if (m) { m->invoke(grp, vlcall); // ** SEGFAULT here } Algorithm explanation : The "invoke" method try to convert "grp", which reflect an "osg::Group*", in a "osgIntrospection::Value", which reflect a "osg::Node*". This because the "setName(const char *)" method found by "grp->getType.getCompatibleMethod" is an "osg::Object" type method. When osgIntrospection do this conversion it try : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" - to converte an Enum to int or unsigned int - to convert the value in its "value string representation", then converte this string in the destination value Else it throw a "TypeConversionException". Bug : 1) When osgIntrospection try to found a chain of "osgIntrospection::Converter" It could do any downcast or (Type to SuperType) or upcast (SuperType to Type). This mean the the chain could be : osg::Group to osg::Transform to osg::Camera to osg::CullSettings to osg::CullStack to osg::CollectOccludersVisitor to osg::NodeVisitor to osg::Referenced to osg::Object During the convertion with this chain, A METTRE failed and the pointer in "grp" is set NULL. But the "grp" is always a valid "osgIntrospection::Value" and so, osgIntrospection accept the conversion. Then it try to use this pointer to call the "setName" function. And Bing SEGFAULT. 2) In "bool Reflection::accum_conv_path( ... )" the convection path isn't accumulate in the recursive loop. this cause multi request of a conversion path, and a slowdown in the conversion algorithm. 3) Use of the last conversion way in a conversion from pointer to pointer this mean you can do this : "osg::Node*" to " value string representation" to "osg::Material*" What a bad thing !!! Solution : 1) Introduce the concept of dynamic_cast and static_cast. now, to do a conversion, osgIntrospection does this : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with static_cast, downcast (Type to SuperType) - to found, if the source and the destination are two pointer, a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with dynamic_cast, upcast (SuperType to Type) - to convert an Enum to int or to unsigned int - to convert the value in its "value string representation", then convert this string in the destination value Else it throw a "TypeConversionException". Add the "enum CastType" to distinguish the static_cast or dynamic_cast converter. Add file OpenSceneGraph/include/osgIntrospection/CastType 2) add a line to accumulate converter in converter Path. 3) add a line to check if source and destination are pointer. "
2007-06-30 22:21:34 +08:00
virtual CastType getCastType() const = 0;
virtual Value convert(const Value& ) const = 0;
virtual ~Converter() {}
};
From David Callu, " Found in the join file the fix for the bug found by Rafa. Problem : osgIntrospection::Value grp(new osg::Group); osgIntrospection::ValueList vlcall; vlcall.push_back(osgIntrospection::Value("toto")); const osgIntrospection::MethodInfo *m = grp->getType.getCompatibleMethod("setName", vlcall, true); if (m) { m->invoke(grp, vlcall); // ** SEGFAULT here } Algorithm explanation : The "invoke" method try to convert "grp", which reflect an "osg::Group*", in a "osgIntrospection::Value", which reflect a "osg::Node*". This because the "setName(const char *)" method found by "grp->getType.getCompatibleMethod" is an "osg::Object" type method. When osgIntrospection do this conversion it try : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" - to converte an Enum to int or unsigned int - to convert the value in its "value string representation", then converte this string in the destination value Else it throw a "TypeConversionException". Bug : 1) When osgIntrospection try to found a chain of "osgIntrospection::Converter" It could do any downcast or (Type to SuperType) or upcast (SuperType to Type). This mean the the chain could be : osg::Group to osg::Transform to osg::Camera to osg::CullSettings to osg::CullStack to osg::CollectOccludersVisitor to osg::NodeVisitor to osg::Referenced to osg::Object During the convertion with this chain, A METTRE failed and the pointer in "grp" is set NULL. But the "grp" is always a valid "osgIntrospection::Value" and so, osgIntrospection accept the conversion. Then it try to use this pointer to call the "setName" function. And Bing SEGFAULT. 2) In "bool Reflection::accum_conv_path( ... )" the convection path isn't accumulate in the recursive loop. this cause multi request of a conversion path, and a slowdown in the conversion algorithm. 3) Use of the last conversion way in a conversion from pointer to pointer this mean you can do this : "osg::Node*" to " value string representation" to "osg::Material*" What a bad thing !!! Solution : 1) Introduce the concept of dynamic_cast and static_cast. now, to do a conversion, osgIntrospection does this : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with static_cast, downcast (Type to SuperType) - to found, if the source and the destination are two pointer, a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with dynamic_cast, upcast (SuperType to Type) - to convert an Enum to int or to unsigned int - to convert the value in its "value string representation", then convert this string in the destination value Else it throw a "TypeConversionException". Add the "enum CastType" to distinguish the static_cast or dynamic_cast converter. Add file OpenSceneGraph/include/osgIntrospection/CastType 2) add a line to accumulate converter in converter Path. 3) add a line to check if source and destination are pointer. "
2007-06-30 22:21:34 +08:00
typedef std::list<const Converter* > ConverterList;
class CompositeConverter: public Converter
{
public:
CompositeConverter(const ConverterList& cvt): cvt_(cvt) {}
CompositeConverter(ConverterList& cvt) { cvt_.swap(cvt); }
virtual ~CompositeConverter() {}
virtual Value convert(const Value& src) const
{
Value accum(src);
for (ConverterList::const_iterator i=cvt_.begin(); i!=cvt_.end(); ++i)
accum = (*i)->convert(accum);
return accum;
}
From David Callu, " Found in the join file the fix for the bug found by Rafa. Problem : osgIntrospection::Value grp(new osg::Group); osgIntrospection::ValueList vlcall; vlcall.push_back(osgIntrospection::Value("toto")); const osgIntrospection::MethodInfo *m = grp->getType.getCompatibleMethod("setName", vlcall, true); if (m) { m->invoke(grp, vlcall); // ** SEGFAULT here } Algorithm explanation : The "invoke" method try to convert "grp", which reflect an "osg::Group*", in a "osgIntrospection::Value", which reflect a "osg::Node*". This because the "setName(const char *)" method found by "grp->getType.getCompatibleMethod" is an "osg::Object" type method. When osgIntrospection do this conversion it try : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" - to converte an Enum to int or unsigned int - to convert the value in its "value string representation", then converte this string in the destination value Else it throw a "TypeConversionException". Bug : 1) When osgIntrospection try to found a chain of "osgIntrospection::Converter" It could do any downcast or (Type to SuperType) or upcast (SuperType to Type). This mean the the chain could be : osg::Group to osg::Transform to osg::Camera to osg::CullSettings to osg::CullStack to osg::CollectOccludersVisitor to osg::NodeVisitor to osg::Referenced to osg::Object During the convertion with this chain, A METTRE failed and the pointer in "grp" is set NULL. But the "grp" is always a valid "osgIntrospection::Value" and so, osgIntrospection accept the conversion. Then it try to use this pointer to call the "setName" function. And Bing SEGFAULT. 2) In "bool Reflection::accum_conv_path( ... )" the convection path isn't accumulate in the recursive loop. this cause multi request of a conversion path, and a slowdown in the conversion algorithm. 3) Use of the last conversion way in a conversion from pointer to pointer this mean you can do this : "osg::Node*" to " value string representation" to "osg::Material*" What a bad thing !!! Solution : 1) Introduce the concept of dynamic_cast and static_cast. now, to do a conversion, osgIntrospection does this : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with static_cast, downcast (Type to SuperType) - to found, if the source and the destination are two pointer, a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with dynamic_cast, upcast (SuperType to Type) - to convert an Enum to int or to unsigned int - to convert the value in its "value string representation", then convert this string in the destination value Else it throw a "TypeConversionException". Add the "enum CastType" to distinguish the static_cast or dynamic_cast converter. Add file OpenSceneGraph/include/osgIntrospection/CastType 2) add a line to accumulate converter in converter Path. 3) add a line to check if source and destination are pointer. "
2007-06-30 22:21:34 +08:00
virtual CastType getCastType() const { return COMPOSITE_CAST; }
private:
ConverterList cvt_;
};
template<typename S, typename D>
struct StaticConverter: Converter
{
virtual ~StaticConverter() {}
virtual Value convert(const Value& src) const
{
return static_cast<D>(variant_cast<S>(src));
}
From David Callu, " Found in the join file the fix for the bug found by Rafa. Problem : osgIntrospection::Value grp(new osg::Group); osgIntrospection::ValueList vlcall; vlcall.push_back(osgIntrospection::Value("toto")); const osgIntrospection::MethodInfo *m = grp->getType.getCompatibleMethod("setName", vlcall, true); if (m) { m->invoke(grp, vlcall); // ** SEGFAULT here } Algorithm explanation : The "invoke" method try to convert "grp", which reflect an "osg::Group*", in a "osgIntrospection::Value", which reflect a "osg::Node*". This because the "setName(const char *)" method found by "grp->getType.getCompatibleMethod" is an "osg::Object" type method. When osgIntrospection do this conversion it try : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" - to converte an Enum to int or unsigned int - to convert the value in its "value string representation", then converte this string in the destination value Else it throw a "TypeConversionException". Bug : 1) When osgIntrospection try to found a chain of "osgIntrospection::Converter" It could do any downcast or (Type to SuperType) or upcast (SuperType to Type). This mean the the chain could be : osg::Group to osg::Transform to osg::Camera to osg::CullSettings to osg::CullStack to osg::CollectOccludersVisitor to osg::NodeVisitor to osg::Referenced to osg::Object During the convertion with this chain, A METTRE failed and the pointer in "grp" is set NULL. But the "grp" is always a valid "osgIntrospection::Value" and so, osgIntrospection accept the conversion. Then it try to use this pointer to call the "setName" function. And Bing SEGFAULT. 2) In "bool Reflection::accum_conv_path( ... )" the convection path isn't accumulate in the recursive loop. this cause multi request of a conversion path, and a slowdown in the conversion algorithm. 3) Use of the last conversion way in a conversion from pointer to pointer this mean you can do this : "osg::Node*" to " value string representation" to "osg::Material*" What a bad thing !!! Solution : 1) Introduce the concept of dynamic_cast and static_cast. now, to do a conversion, osgIntrospection does this : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with static_cast, downcast (Type to SuperType) - to found, if the source and the destination are two pointer, a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with dynamic_cast, upcast (SuperType to Type) - to convert an Enum to int or to unsigned int - to convert the value in its "value string representation", then convert this string in the destination value Else it throw a "TypeConversionException". Add the "enum CastType" to distinguish the static_cast or dynamic_cast converter. Add file OpenSceneGraph/include/osgIntrospection/CastType 2) add a line to accumulate converter in converter Path. 3) add a line to check if source and destination are pointer. "
2007-06-30 22:21:34 +08:00
virtual CastType getCastType() const { return STATIC_CAST; }
};
template<typename S, typename D>
struct DynamicConverter: Converter
{
virtual ~DynamicConverter() {}
virtual Value convert(const Value& src) const
{
return dynamic_cast<D>(variant_cast<S>(src));
}
From David Callu, " Found in the join file the fix for the bug found by Rafa. Problem : osgIntrospection::Value grp(new osg::Group); osgIntrospection::ValueList vlcall; vlcall.push_back(osgIntrospection::Value("toto")); const osgIntrospection::MethodInfo *m = grp->getType.getCompatibleMethod("setName", vlcall, true); if (m) { m->invoke(grp, vlcall); // ** SEGFAULT here } Algorithm explanation : The "invoke" method try to convert "grp", which reflect an "osg::Group*", in a "osgIntrospection::Value", which reflect a "osg::Node*". This because the "setName(const char *)" method found by "grp->getType.getCompatibleMethod" is an "osg::Object" type method. When osgIntrospection do this conversion it try : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" - to converte an Enum to int or unsigned int - to convert the value in its "value string representation", then converte this string in the destination value Else it throw a "TypeConversionException". Bug : 1) When osgIntrospection try to found a chain of "osgIntrospection::Converter" It could do any downcast or (Type to SuperType) or upcast (SuperType to Type). This mean the the chain could be : osg::Group to osg::Transform to osg::Camera to osg::CullSettings to osg::CullStack to osg::CollectOccludersVisitor to osg::NodeVisitor to osg::Referenced to osg::Object During the convertion with this chain, A METTRE failed and the pointer in "grp" is set NULL. But the "grp" is always a valid "osgIntrospection::Value" and so, osgIntrospection accept the conversion. Then it try to use this pointer to call the "setName" function. And Bing SEGFAULT. 2) In "bool Reflection::accum_conv_path( ... )" the convection path isn't accumulate in the recursive loop. this cause multi request of a conversion path, and a slowdown in the conversion algorithm. 3) Use of the last conversion way in a conversion from pointer to pointer this mean you can do this : "osg::Node*" to " value string representation" to "osg::Material*" What a bad thing !!! Solution : 1) Introduce the concept of dynamic_cast and static_cast. now, to do a conversion, osgIntrospection does this : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with static_cast, downcast (Type to SuperType) - to found, if the source and the destination are two pointer, a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with dynamic_cast, upcast (SuperType to Type) - to convert an Enum to int or to unsigned int - to convert the value in its "value string representation", then convert this string in the destination value Else it throw a "TypeConversionException". Add the "enum CastType" to distinguish the static_cast or dynamic_cast converter. Add file OpenSceneGraph/include/osgIntrospection/CastType 2) add a line to accumulate converter in converter Path. 3) add a line to check if source and destination are pointer. "
2007-06-30 22:21:34 +08:00
virtual CastType getCastType() const { return DYNAMIC_CAST; }
};
template<typename S, typename D>
struct ReinterpretConverter: Converter
{
virtual ~ReinterpretConverter() {}
virtual Value convert(const Value& src) const
{
return reinterpret_cast<D>(variant_cast<S>(src));
}
From David Callu, " Found in the join file the fix for the bug found by Rafa. Problem : osgIntrospection::Value grp(new osg::Group); osgIntrospection::ValueList vlcall; vlcall.push_back(osgIntrospection::Value("toto")); const osgIntrospection::MethodInfo *m = grp->getType.getCompatibleMethod("setName", vlcall, true); if (m) { m->invoke(grp, vlcall); // ** SEGFAULT here } Algorithm explanation : The "invoke" method try to convert "grp", which reflect an "osg::Group*", in a "osgIntrospection::Value", which reflect a "osg::Node*". This because the "setName(const char *)" method found by "grp->getType.getCompatibleMethod" is an "osg::Object" type method. When osgIntrospection do this conversion it try : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" - to converte an Enum to int or unsigned int - to convert the value in its "value string representation", then converte this string in the destination value Else it throw a "TypeConversionException". Bug : 1) When osgIntrospection try to found a chain of "osgIntrospection::Converter" It could do any downcast or (Type to SuperType) or upcast (SuperType to Type). This mean the the chain could be : osg::Group to osg::Transform to osg::Camera to osg::CullSettings to osg::CullStack to osg::CollectOccludersVisitor to osg::NodeVisitor to osg::Referenced to osg::Object During the convertion with this chain, A METTRE failed and the pointer in "grp" is set NULL. But the "grp" is always a valid "osgIntrospection::Value" and so, osgIntrospection accept the conversion. Then it try to use this pointer to call the "setName" function. And Bing SEGFAULT. 2) In "bool Reflection::accum_conv_path( ... )" the convection path isn't accumulate in the recursive loop. this cause multi request of a conversion path, and a slowdown in the conversion algorithm. 3) Use of the last conversion way in a conversion from pointer to pointer this mean you can do this : "osg::Node*" to " value string representation" to "osg::Material*" What a bad thing !!! Solution : 1) Introduce the concept of dynamic_cast and static_cast. now, to do a conversion, osgIntrospection does this : - to found a "osgIntrospection::Converter" to convert from "osg::Group*" to "osg::Node*" - to found a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with static_cast, downcast (Type to SuperType) - to found, if the source and the destination are two pointer, a chain of "osgIntrospection::Converter" to convert from "osg::Group*" to "one or many type" to "osg::Node*" only with dynamic_cast, upcast (SuperType to Type) - to convert an Enum to int or to unsigned int - to convert the value in its "value string representation", then convert this string in the destination value Else it throw a "TypeConversionException". Add the "enum CastType" to distinguish the static_cast or dynamic_cast converter. Add file OpenSceneGraph/include/osgIntrospection/CastType 2) add a line to accumulate converter in converter Path. 3) add a line to check if source and destination are pointer. "
2007-06-30 22:21:34 +08:00
virtual CastType getCastType() const { return REINTERPRET_CAST; }
};
}
#endif