reflect.h

java 反射机制详解示例,实现类属性及方法修改

#ifndef __REFLECT_H__
#define __REFLECT_H__

#ifdef USE_RTTI
#include <typeinfo>
#endif

#ifdef RTTI_DLL
#ifdef INSIDE_RTTI
#define RTTI_DLL_ENTRY __declspec(dllexport)
#else
#define RTTI_DLL_ENTRY __declspec(dllimport)
#endif
#else
#define RTTI_DLL_ENTRY
#endif


#include "type.h"
#include "class.h"
#include "field.h"
#include "method.h"

const int RTTI_CLASS_HASH_SIZE = 1013;

/**
 * Repository with runtime type information
 */
class RTTI_DLL_ENTRY RTTIRepository { 
  public:
    /**
     * Get first class in repostiory.
     * Classes in repository are linked in L1 list. <code>RTTIClassDescriptor::getNext()</code>
     * method can be used to iterate through elements of this list
     * @return head element of L1 list of classes
     */
    RTTIClassDescriptor* getFirstClass() { 
	return classes;
    }

    /**
     * Find class with specified name
     * @param name name of the class
     * @return class descriptor with specified name or <code>NULL</code> if not found
     */
    RTTIClassDescriptor*               findClass(char const* name);

#ifdef USE_RTTI
    /**
     * Find class using RTTI <code>type_info</code> object
     * @param tinfo <code>type_info</code> object returned by compiler
     * @return class descriptor or <code>NULL</code> if not found
     */
     * 
    RTTIClassDescriptor*               findClass(class type_info const& tinfo) { 
	return findClass(tinfo.getName());
    }
#endif

    /**
     * Get instance of repostory
     * @return instance of repository
     */
    static RTTIRepository* getInstance() { 
	return &theRepository;
    }

    /**
     * Add new class descriptor to the repository
     * @param cls new class descriptor
     */
    bool addClass(RTTIClassDescriptor* cls); 

    /**
     * Load type information from specified file. Implementation of this method in this always return false.
     * At this moment there is only one other source of extracting type information - executable files
     * in ELF format compiled with debug information. To be able to extract type information from
     * debug information, you should use <code>RTTIBfdRepository</code> class derived from 
     * <code>RTTIRepostiory</code> class and overriding thids method.
     * @param filePath path to the file contaning type information.
     * @return <code>true</code> if infomation was successfully loaded, <code>false</code> otherwise
     */
    virtual bool load(char const* filePath);

  protected:
    static RTTIRepository theRepository;
    RTTIClassDescriptor*  classes;
    RTTIClassDescriptor*  hashTable[RTTI_CLASS_HASH_SIZE];    
};


#endif