Class: PG::CompositeCoder

Inherits:
Coder
  • Object
show all
Defined in:
ext/pg_coder.c,
lib/pg/coder.rb,
ext/pg_coder.c

Overview

This is the base class for all type cast classes of PostgreSQL types, that are made up of some sub type.

See PG::TextEncoder::Array, PG::TextDecoder::Array, PG::BinaryEncoder::Array, PG::BinaryDecoder::Array, etc.

Direct Known Subclasses

CompositeDecoder, CompositeEncoder

Constant Summary

Constants inherited from Coder

PG::Coder::FORMAT_ERROR_MASK, PG::Coder::FORMAT_ERROR_TO_PARTIAL, PG::Coder::FORMAT_ERROR_TO_RAISE, PG::Coder::FORMAT_ERROR_TO_STRING, PG::Coder::TIMESTAMP_APP_LOCAL, PG::Coder::TIMESTAMP_APP_UTC, PG::Coder::TIMESTAMP_DB_LOCAL, PG::Coder::TIMESTAMP_DB_UTC

Instance Attribute Summary collapse

Attributes inherited from Coder

#name

Instance Method Summary collapse

Methods inherited from Coder

#==, #dup, #flags, #flags=, #format, #format=, #initialize, #inspect_short, #marshal_dump, #marshal_load, #oid, #oid=

Constructor Details

This class inherits a constructor from PG::Coder

Instance Attribute Details

#elements_type ⇒ Object (readonly)

Instance Method Details

#delimiter ⇒ String

The character that separates values within the composite type.

Returns:

  • (String) 


419
420
421
422
423
424
 
# File 'ext/pg_coder.c', line 419

static VALUE
pg_coder_delimiter_get(VALUE self)
{
  t_pg_composite_coder *this = RTYPEDDATA_DATA(self);
  return rb_str_new(&this->delimiter, 1);
}

#delimiter=(String) ⇒ Object

Specifies the character that separates values within the composite type. The default is a comma. This must be a single one-byte character.



401
402
403
404
405
406
407
408
409
410
411
 
# File 'ext/pg_coder.c', line 401

static VALUE
pg_coder_delimiter_set(VALUE self, VALUE delimiter)
{
  t_pg_composite_coder *this = RTYPEDDATA_DATA(self);
  rb_check_frozen(self);
  StringValue(delimiter);
  if(RSTRING_LEN(delimiter) != 1)
    rb_raise( rb_eArgError, "delimiter size must be one byte");
  this->delimiter = *RSTRING_PTR(delimiter);
  return delimiter;
}

#dimensions ⇒ Integer | nil

Get number of enforced array dimensions or nil if not set.

See #dimensions=

Returns:

  • (Integer | nil) 


462
463
464
465
466
467
 
# File 'ext/pg_coder.c', line 462

static VALUE
pg_coder_dimensions_get(VALUE self)
{
  t_pg_composite_coder *this = RTYPEDDATA_DATA(self);
  return this->dimensions < 0 ? Qnil : INT2NUM(this->dimensions);
}

#dimensions=(Integer) ⇒ Object #dimensions=(nil) ⇒ Object

Set number of array dimensions to be encoded.

This property ensures, that this number of dimensions is always encoded. If less dimensions than this number are in the given value, an ArgumentError is raised. If more dimensions than this number are in the value, the Array value is passed to the next encoder.

Setting dimensions is especially useful, when a Record shall be encoded into an Array, since the Array encoder can not distinguish if the array shall be encoded as a higher dimension or as a record otherwise.

The default is nil.

See #dimensions



443
444
445
446
447
448
449
450
451
452
 
# File 'ext/pg_coder.c', line 443

static VALUE
pg_coder_dimensions_set(VALUE self, VALUE dimensions)
{
  t_pg_composite_coder *this = RTYPEDDATA_DATA(self);
  rb_check_frozen(self);
  if(!NIL_P(dimensions) && NUM2INT(dimensions) < 0)
    rb_raise( rb_eArgError, "dimensions must be nil or >= 0");
  this->dimensions = NIL_P(dimensions) ? -1 : NUM2INT(dimensions);
  return dimensions;
}

#elements_type=(coder) ⇒ Object (readonly)

Specifies the PG::Coder object that is used to encode or decode the single elementes of this composite type.

If set to nil all values are encoded and decoded as String objects.



478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
 
# File 'ext/pg_coder.c', line 478

static VALUE
pg_coder_elements_type_set(VALUE self, VALUE elem_type)
{
  t_pg_composite_coder *this = RTYPEDDATA_DATA( self );

  rb_check_frozen(self);
  if ( NIL_P(elem_type) ){
    this->elem = NULL;
  } else if ( rb_obj_is_kind_of(elem_type, rb_cPG_Coder) ){
    this->elem = RTYPEDDATA_DATA( elem_type );
  } else {
    rb_raise( rb_eTypeError, "wrong elements type %s (expected some kind of PG::Coder)",
        rb_obj_classname( elem_type ) );
  }

  rb_iv_set( self, "@elements_type", elem_type );
  return elem_type;
}

#inspect ⇒ Object 



83
84
85
86
87
 
# File 'lib/pg/coder.rb', line 83

def inspect
  str = super
  str[-1,0] = " elements_type=#{elements_type.inspect} #{needs_quotation? ? 'needs' : 'no'} quotation#{dimensions && " #{dimensions} dimensions"}"
  str
end

#needs_quotation=(Boolean) ⇒ Object

Specifies whether the assigned #elements_type requires quotation marks to be transferred safely. Encoding with #needs_quotation=false is somewhat faster.

The default is true. This option is ignored for decoding of values.



370
371
372
373
374
375
376
377
 
# File 'ext/pg_coder.c', line 370

static VALUE
pg_coder_needs_quotation_set(VALUE self, VALUE needs_quotation)
{
  t_pg_composite_coder *this = RTYPEDDATA_DATA(self);
  rb_check_frozen(self);
  this->needs_quotation = RTEST(needs_quotation);
  return needs_quotation;
}

#needs_quotation ⇒ Boolean

Specifies whether the assigned #elements_type requires quotation marks to be transferred safely.

Returns:

  • (Boolean) 


386
387
388
389
390
391
 
# File 'ext/pg_coder.c', line 386

static VALUE
pg_coder_needs_quotation_get(VALUE self)
{
  t_pg_composite_coder *this = RTYPEDDATA_DATA(self);
  return this->needs_quotation ? Qtrue : Qfalse;
}

#to_h ⇒ Object 



74
75
76
77
78
79
80
81
 
# File 'lib/pg/coder.rb', line 74

def to_h
  { **super,
    elements_type: elements_type,
    needs_quotation: needs_quotation?,
    delimiter: delimiter,
    dimensions: dimensions,
  }
end