Class: PG::TypeMapByMriType

Inherits:
TypeMap
  • Object
show all
Includes:
PG::TypeMap::DefaultTypeMappable
Defined in:
ext/pg_type_map_by_mri_type.c,
ext/pg_type_map_by_mri_type.c

Overview

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.

Instance Method Summary collapse

Methods included from PG::TypeMap::DefaultTypeMappable

#default_type_map, #default_type_map=, #with_default_type_map

Instance Method Details

#[](mri_type) ⇒ Object

Returns the encoder object for the given mri_type

See #[]= for allowed mri_type .


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# File 'ext/pg_type_map_by_mri_type.c', line 239

static VALUE
pg_tmbmt_aref( VALUE self, VALUE mri_type )
{
	VALUE coder;
	t_tmbmt *this = RTYPEDDATA_DATA( 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) ⇒ Object

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


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# File 'ext/pg_type_map_by_mri_type.c', line 208

static VALUE
pg_tmbmt_aset( VALUE self, VALUE mri_type, VALUE coder )
{
	t_tmbmt *this = RTYPEDDATA_DATA( 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;
}

#codersHash

Returns all mri types and their assigned encoder object.

Returns:

  • (Hash)

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# File 'ext/pg_type_map_by_mri_type.c', line 268

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

	FOR_EACH_MRI_TYPE( ADD_TO_HASH );

	return rb_obj_freeze(hash_coders);
}