class PG::TypeMapByMriType - pg-0.18.4 Documentation

# class PG::TypeMapByMriType

This type map casts values based on the Ruby object type code of the given value to be sent.

This type map is usable for type casting query bind parameters and COPY data for PG::Connection#put_copy_data . Therefore only encoders might be assigned by the []= method.

Note : This type map is not portable across Ruby implementations and is less flexible than PG::TypeMapByClass. It is kept only for performance comparisons, but PG::TypeMapByClass proved to be equally fast in almost all cases.

### Public Instance Methods

[mri_type] → coder click to toggle source

Returns the encoder object for the given `mri_type`

See []= for allowed `mri_type` .

    static VALUE
    pg_tmbmt_aref( VALUE self, VALUE mri_type )
    {
            VALUE coder;
            t_tmbmt *this = DATA_PTR( self );
            char *p_mri_type;

            p_mri_type = StringValueCStr(mri_type);

            if(0){}
            FOR_EACH_MRI_TYPE( COMPARE_AND_GET )
            else{
                    VALUE mri_type_inspect = rb_inspect( mri_type );
                    rb_raise(rb_eArgError, "unknown mri_type %s", StringValueCStr(mri_type_inspect));
            }

            return coder;
    }

[mri_type] = coder click to toggle source

Assigns a new PG::Coder object to the type map. The encoder is registered for type casts of the given `mri_type` .

`coder` can be one of the following:

- `nil` - Values are forwarded to the default_type_map .

- a PG::Coder - Values are encoded by the given encoder

- a Symbol - The method of this type map (or a derivation) that is called for each value to sent. It must return a PG::Coder.

- a Proc - The Proc object is called for each value. It must return a PG::Coder.

`mri_type` must be one of the following strings:

- `T_FIXNUM`

- `T_TRUE`

- `T_FALSE`

- `T_FLOAT`

- `T_BIGNUM`

- `T_COMPLEX`

- `T_RATIONAL`

- `T_ARRAY`

- `T_STRING`

- `T_SYMBOL`

- `T_OBJECT`

- `T_CLASS`

- `T_MODULE`

- `T_REGEXP`

- `T_HASH`

- `T_STRUCT`

- `T_FILE`

- `T_DATA`

    static VALUE
    pg_tmbmt_aset( VALUE self, VALUE mri_type, VALUE coder )
    {
            t_tmbmt *this = DATA_PTR( self );
            char *p_mri_type;

            p_mri_type = StringValueCStr(mri_type);

            if(0){}
            FOR_EACH_MRI_TYPE( COMPARE_AND_ASSIGN )
            else{
                    VALUE mri_type_inspect = rb_inspect( mri_type );
                    rb_raise(rb_eArgError, "unknown mri_type %s", StringValueCStr(mri_type_inspect));
            }

            return self;
    }

coders → Hash click to toggle source

Returns all mri types and their assigned encoder object.

    static VALUE
    pg_tmbmt_coders( VALUE self )
    {
            t_tmbmt *this = DATA_PTR( self );
            VALUE hash_coders = rb_hash_new();

            FOR_EACH_MRI_TYPE( ADD_TO_HASH );

            return rb_obj_freeze(hash_coders);
    }