如何将 Corba 结构（包含“任何”类型）复制到 C++ 结构中

Question

In Corba, I have a struct like so:

module XYZ {
    typedef string AttributeName;  
    struct AttributeColumn {
        AttributeName name;              // Column attribute name
        any    data;                     // Column attribute value
    };
    typedef sequence <AttributeColumn> AttributeTable;
}

It contains values from a corresponding Sqlite database table which has the following field:

ABC_Name VARCHAR NOT NULL UNIQUE

I want to copy these values into a C++ struct, which consists of the following:

namespace DEF {
    typedef std::string AttributeName;
    typedef std::vector<std::string> StringCol;
    struct AttributeColumn {
        AttributeName name;              // Column attribute name
        StringCol str;                   // Column values if string
    };
   typedef std::vector<AttributeColumn> AttributeTable;
}

Here is my attempt:

XYZ::AttributeTable & xyz_table = getAttributeTable (); // This gives me the table containing the data from the database.
int rows = getLength ( xyz_table ); // This gives me the number of rows in the database.
DEF::AttributeTable def_table;

for (int i=0;i<rows;i++) {
    def_table[i].name = xyz_table[i].name;
    std::cout << def_table[i].name << std::endl;
    xyz_table[i].data >>= def_table[i].str;
    std::cout << def_table[i].str << std::endl;
}

However, the above does not compile. I get the following error message:

ERROR: 1> error: no match for ‘operator>>=’ (operand types are ‘CORBA::Any’ and ‘DEF::StringCol’ {aka ‘std::vector<std::basic_string<char> >’})

If I comment out the last two lines in the for loop, then the code compiles, but it crashes. So, somehow, the copy into the def_table for the "name" field does not work correctly either.

Answer 1

try this :

namespace DEF {
typedef std::string AttributeName;
typedef std::vector<std::string> StringCol;
struct AttributeColumn {
    AttributeName name;              // Column attribute name
    CORBA::Any str;                   // Column values if string
};
typedef std::vector<AttributeColumn> AttributeTable;
};

because str need to be the same type of data .