Module: Oj

Defined in:
ext/oj/oj.c,
lib/oj.rb,
lib/oj/bag.rb,
lib/oj/saj.rb,
lib/oj/error.rb,
lib/oj/mimic.rb,
lib/oj/version.rb,
lib/oj/easy_hash.rb,
lib/oj/schandler.rb,
lib/oj/active_support_helper.rb,
ext/oj/oj.c

Overview

Optimized JSON (Oj), as the name implies was written to provide speed optimized JSON handling.

Oj uses modes to control how object are encoded and decoded. In addition global and options to methods allow additional behavior modifications. The modes are:

  • :strict mode will only allow the 7 basic JSON types to be serialized. Any other Object will raise an Exception.

  • :null mode is similar to the :strict mode except any Object that is not one of the JSON base types is replaced by a JSON null.

  • :object mode will dump any Object as a JSON Object with keys that match the Ruby Object's variable names without the '@' character. This is the highest performance mode.

  • :compat or :json mode is the compatible mode for the json gem. It mimics the json gem including the options, defaults, and restrictions.

  • :rails is the compatibility mode for Rails or Active support.

  • :custom is the most configurable mode.

  • :wab specifically for WAB data exchange.

Defined Under Namespace

Modules: Rails Classes: ActiveSupportHelper, Bag, CStack, Doc, EasyHash, MimicDumpOption, Saj, ScHandler, StreamWriter, StringWriter

Constant Summary collapse

Error =

Inherit Error class from StandardError.

Class.new(StandardError)
ParseError =

An Exception that is raised as a result of a parse error while parsing a JSON document.

Class.new(Error)
DepthError =

An Exception that is raised as a result of a path being too deep.

Class.new(Error)
LoadError =

An Exception that is raised if a file fails to load.

Class.new(Error)
MimicError =

An Exception that is raised if there is a conflict with mimicing JSON

Class.new(Error)
VERSION =

Current version of the module.

'3.10.12'

Class Method Summary collapse

Class Method Details

.add_to_json(*args) ⇒ Object

Override simple to_s dump behavior in :compat mode to instead use an optimized dump that includes the classname and attributes so that the object can be re-created on load. The format is the same as the json gem but does not use the ruby methods for encoding.

The classes supported for optimization are: Array, BigDecimal, Complex, Date, DateTime, Exception, Hash, Integer, OpenStruct, Range, Rational, Regexp, Struct, and Time. Providing no classes will result in all those classes being optimized.q

  • *args( [Class] zero or more classes to optimize.


1423
# File 'ext/oj/oj.c', line 1423

extern VALUE	oj_add_to_json(int argc, VALUE *argv, VALUE self);

.compat_load(json, options) { ... } ⇒ Object

Parses a JSON document String into an Object, Hash, Array, String, Fixnum, Float, true, false, or nil. It parses using a mode that is generally compatible with other Ruby JSON parsers in that it will create objects based on the :create_id value. It is not compatible in every way to every other parser though as each parser has it's own variations.

When used with a document that has multiple JSON elements the block, if any, will be yielded to. If no block then the last element read will be returned.

Raises an exception if the JSON is malformed or the classes specified are not valid. If the input is not a valid JSON document (an empty string is not a valid JSON document) an exception is raised.

A block can be provided with a single argument. That argument will be the parsed JSON document. This is useful when parsing a string that includes multiple JSON documents. The block can take up to 3 arguments, the parsed object, the position in the string or stream of the start of the JSON for that object, and the length of the JSON for that object plus trailing whitespace.

  • json [String|IO] JSON String or an Object that responds to read().

  • options [Hash] load options (same as default_options).

  • obj [Hash|Array|String|Fixnum|Float|Boolean|nil] parsed object.

  • start [_optional, Integer] start position of parsed JSON for obj.

  • len [_optional, Integer] length of parsed JSON for obj.

Returns [Hash|Array|String|Fixnum|Float|Boolean|nil]

Yields:


1341
# File 'ext/oj/oj.c', line 1341

extern VALUE	oj_compat_parse(int argc, VALUE *argv, VALUE self);

.default_optionsObject

Returns the default load and dump options as a Hash. The options are

  • :indent [Fixnum|String|nil] number of spaces to indent each element in an JSON document, zero or nil is no newline between JSON elements, negative indicates no newline between top level JSON elements in a stream, a String indicates the string should be used for indentation

  • :circular [Boolean|nil] support circular references while dumping

  • :auto_define [Boolean|nil] automatically define classes if they do not exist

  • :symbol_keys [Boolean|nil] use symbols instead of strings for hash keys

  • :escape_mode [:newline|:json|:xss_safe|:ascii|unicode_xss|nil] determines the characters to escape

  • :class_cache [Boolean|nil] cache classes for faster parsing (if dynamically modifying classes or reloading classes then don't use this)

  • :mode [:object|:strict|:compat|:null|:custom|:rails|:wab] load and dump modes to use for JSON

  • :time_format [:unix|:unix_zone|:xmlschema|:ruby] time format when dumping

  • :bigdecimal_as_decimal [Boolean|nil] dump BigDecimal as a decimal number or as a String

  • :bigdecimal_load [:bigdecimal|:float|:auto|:fast] load decimals as BigDecimal instead of as a Float. :auto pick the most precise for the number of digits. :float should be the same as ruby. :fast may require rounding but is must faster.

  • :create_id [String|nil] create id for json compatible object encoding, default is 'json_class'

  • :create_additions [Boolean|nil] if true allow creation of instances using create_id on load.

  • :second_precision [Fixnum|nil] number of digits after the decimal when dumping the seconds portion of time

  • :float_precision [Fixnum|nil] number of digits of precision when dumping floats, 0 indicates use Ruby

  • :use_to_json [Boolean|nil] call to_json() methods on dump, default is false

  • :use_as_json [Boolean|nil] call as_json() methods on dump, default is false

  • :use_raw_json [Boolean|nil] call raw_json() methods on dump, default is false

  • :nilnil [Boolean|nil] if true a nil input to load will return nil and not raise an Exception

  • :empty_string [Boolean|nil] if true an empty input will not raise an Exception

  • :allow_gc [Boolean|nil] allow or prohibit GC during parsing, default is true (allow)

  • :quirks_mode [true,|false|nil] Allow single JSON values instead of documents, default is true (allow)

  • :allow_invalid_unicode [true,|false|nil] Allow invalid unicode, default is false (don't allow)

  • :allow_nan [true,|false|nil] Allow Nan, Infinity, and -Infinity to be parsed, default is true (allow)

  • :indent_str [String|nil] String to use for indentation, overriding the indent option is not nil

  • :space [String|nil] String to use for the space after the colon in JSON object fields

  • :space_before [String|nil] String to use before the colon separator in JSON object fields

  • :object_nl [String|nil] String to use after a JSON object field value

  • :array_nl [String|nil] String to use after a JSON array value

  • :nan [:null|:huge|:word|:raise|:auto] how to dump Infinity and NaN. :null places a null, :huge places a huge number, :word places Infinity or NaN, :raise raises and exception, :auto uses default for each mode.

  • :hash_class [Class|nil] Class to use instead of Hash on load, :object_class can also be used

  • :array_class [Class|nil] Class to use instead of Array on load

  • :omit_nil [true|false] if true Hash and Object attributes with nil values are omitted

  • :ignore [nil|Array] either nil or an Array of classes to ignore when dumping

  • :ignore_under [Boolean] if true then attributes that start with _ are ignored when dumping in object or custom mode.

  • :integer_range [Range] Dump integers outside range as strings.

  • :trace [true,|false] Trace all load and dump calls, default is false (trace is off)

  • :safe [true,|false] Safe mimic breaks JSON mimic to be safer, default is false (safe is off)

Return [Hash] all current option settings.


265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
# File 'ext/oj/oj.c', line 265

static VALUE
get_def_opts(VALUE self) {
    VALUE	opts = rb_hash_new();

    if (0 == oj_default_options.dump_opts.indent_size) {
	rb_hash_aset(opts, oj_indent_sym, INT2FIX(oj_default_options.indent));
    } else {
	rb_hash_aset(opts, oj_indent_sym, rb_str_new2(oj_default_options.dump_opts.indent_str));
    }
    rb_hash_aset(opts, sec_prec_sym, INT2FIX(oj_default_options.sec_prec));
    rb_hash_aset(opts, circular_sym, (Yes == oj_default_options.circular) ? Qtrue : ((No == oj_default_options.circular) ? Qfalse : Qnil));
    rb_hash_aset(opts, class_cache_sym, (Yes == oj_default_options.class_cache) ? Qtrue : ((No == oj_default_options.class_cache) ? Qfalse : Qnil));
    rb_hash_aset(opts, auto_define_sym, (Yes == oj_default_options.auto_define) ? Qtrue : ((No == oj_default_options.auto_define) ? Qfalse : Qnil));
    rb_hash_aset(opts, symbol_keys_sym, (Yes == oj_default_options.sym_key) ? Qtrue : ((No == oj_default_options.sym_key) ? Qfalse : Qnil));
    rb_hash_aset(opts, bigdecimal_as_decimal_sym, (Yes == oj_default_options.bigdec_as_num) ? Qtrue : ((No == oj_default_options.bigdec_as_num) ? Qfalse : Qnil));
    rb_hash_aset(opts, oj_create_additions_sym, (Yes == oj_default_options.create_ok) ? Qtrue : ((No == oj_default_options.create_ok) ? Qfalse : Qnil));
    rb_hash_aset(opts, use_to_json_sym, (Yes == oj_default_options.to_json) ? Qtrue : ((No == oj_default_options.to_json) ? Qfalse : Qnil));
    rb_hash_aset(opts, use_to_hash_sym, (Yes == oj_default_options.to_hash) ? Qtrue : ((No == oj_default_options.to_hash) ? Qfalse : Qnil));
    rb_hash_aset(opts, use_as_json_sym, (Yes == oj_default_options.as_json) ? Qtrue : ((No == oj_default_options.as_json) ? Qfalse : Qnil));
    rb_hash_aset(opts, use_raw_json_sym, (Yes == oj_default_options.raw_json) ? Qtrue : ((No == oj_default_options.raw_json) ? Qfalse : Qnil));
    rb_hash_aset(opts, nilnil_sym, (Yes == oj_default_options.nilnil) ? Qtrue : ((No == oj_default_options.nilnil) ? Qfalse : Qnil));
    rb_hash_aset(opts, empty_string_sym, (Yes == oj_default_options.empty_string) ? Qtrue : ((No == oj_default_options.empty_string) ? Qfalse : Qnil));
    rb_hash_aset(opts, allow_gc_sym, (Yes == oj_default_options.allow_gc) ? Qtrue : ((No == oj_default_options.allow_gc) ? Qfalse : Qnil));
    rb_hash_aset(opts, oj_quirks_mode_sym, (Yes == oj_default_options.quirks_mode) ? Qtrue : ((No == oj_default_options.quirks_mode) ? Qfalse : Qnil));
    rb_hash_aset(opts, allow_invalid_unicode_sym, (Yes == oj_default_options.allow_invalid) ? Qtrue : ((No == oj_default_options.allow_invalid) ? Qfalse : Qnil));
    rb_hash_aset(opts, oj_allow_nan_sym, (Yes == oj_default_options.allow_nan) ? Qtrue : ((No == oj_default_options.allow_nan) ? Qfalse : Qnil));
    rb_hash_aset(opts, oj_trace_sym, (Yes == oj_default_options.trace) ? Qtrue : ((No == oj_default_options.trace) ? Qfalse : Qnil));
    rb_hash_aset(opts, oj_safe_sym, (Yes == oj_default_options.safe) ? Qtrue : ((No == oj_default_options.safe) ? Qfalse : Qnil));
    rb_hash_aset(opts, float_prec_sym, INT2FIX(oj_default_options.float_prec));
    rb_hash_aset(opts, ignore_under_sym, (Yes == oj_default_options.ignore_under) ? Qtrue : ((No == oj_default_options.ignore_under) ? Qfalse : Qnil));
    switch (oj_default_options.mode) {
    case StrictMode:	rb_hash_aset(opts, mode_sym, strict_sym);	break;
    case CompatMode:	rb_hash_aset(opts, mode_sym, compat_sym);	break;
    case NullMode:	rb_hash_aset(opts, mode_sym, null_sym);		break;
    case ObjectMode:	rb_hash_aset(opts, mode_sym, object_sym);	break;
    case CustomMode:	rb_hash_aset(opts, mode_sym, custom_sym);	break;
    case RailsMode:	rb_hash_aset(opts, mode_sym, rails_sym);	break;
    case WabMode:	rb_hash_aset(opts, mode_sym, wab_sym);		break;
    default:		rb_hash_aset(opts, mode_sym, object_sym);	break;
    }

    if (oj_default_options.int_range_max != 0 || oj_default_options.int_range_min != 0) {
	VALUE	range = rb_obj_alloc(rb_cRange);
	VALUE	min = LONG2FIX(oj_default_options.int_range_min);
	VALUE	max = LONG2FIX(oj_default_options.int_range_max);

	rb_ivar_set(range, oj_begin_id, min);
	rb_ivar_set(range, oj_end_id, max);
	rb_hash_aset(opts, integer_range_sym, range);
    } else {
	rb_hash_aset(opts, integer_range_sym, Qnil);
    }
    switch (oj_default_options.escape_mode) {
    case NLEsc:		rb_hash_aset(opts, escape_mode_sym, newline_sym);	break;
    case JSONEsc:	rb_hash_aset(opts, escape_mode_sym, json_sym);		break;
    case XSSEsc:	rb_hash_aset(opts, escape_mode_sym, xss_safe_sym);	break;
    case ASCIIEsc:	rb_hash_aset(opts, escape_mode_sym, ascii_sym);		break;
    case JXEsc:		rb_hash_aset(opts, escape_mode_sym, unicode_xss_sym);	break;
    default:		rb_hash_aset(opts, escape_mode_sym, json_sym);		break;
    }
    switch (oj_default_options.time_format) {
    case XmlTime:	rb_hash_aset(opts, time_format_sym, xmlschema_sym);	break;
    case RubyTime:	rb_hash_aset(opts, time_format_sym, ruby_sym);		break;
    case UnixZTime:	rb_hash_aset(opts, time_format_sym, unix_zone_sym);	break;
    case UnixTime:
    default:		rb_hash_aset(opts, time_format_sym, unix_sym);		break;
    }
    switch (oj_default_options.bigdec_load) {
    case BigDec:	rb_hash_aset(opts, bigdecimal_load_sym, bigdecimal_sym);break;
    case FloatDec:	rb_hash_aset(opts, bigdecimal_load_sym, float_sym);	break;
    case FastDec:	rb_hash_aset(opts, bigdecimal_load_sym, fast_sym);	break;
    case AutoDec:
    default:		rb_hash_aset(opts, bigdecimal_load_sym, auto_sym);	break;
    }
    rb_hash_aset(opts, create_id_sym, (NULL == oj_default_options.create_id) ? Qnil : rb_str_new2(oj_default_options.create_id));
    rb_hash_aset(opts, oj_space_sym, (0 == oj_default_options.dump_opts.after_size) ? Qnil : rb_str_new2(oj_default_options.dump_opts.after_sep));
    rb_hash_aset(opts, oj_space_before_sym, (0 == oj_default_options.dump_opts.before_size) ? Qnil : rb_str_new2(oj_default_options.dump_opts.before_sep));
    rb_hash_aset(opts, oj_object_nl_sym, (0 == oj_default_options.dump_opts.hash_size) ? Qnil : rb_str_new2(oj_default_options.dump_opts.hash_nl));
    rb_hash_aset(opts, oj_array_nl_sym, (0 == oj_default_options.dump_opts.array_size) ? Qnil : rb_str_new2(oj_default_options.dump_opts.array_nl));

    switch (oj_default_options.dump_opts.nan_dump) {
    case NullNan:	rb_hash_aset(opts, nan_sym, null_sym);	break;
    case RaiseNan:	rb_hash_aset(opts, nan_sym, raise_sym);	break;
    case WordNan:	rb_hash_aset(opts, nan_sym, word_sym);	break;
    case HugeNan:	rb_hash_aset(opts, nan_sym, huge_sym);	break;
    case AutoNan:
    default:		rb_hash_aset(opts, nan_sym, auto_sym);	break;
    }
    rb_hash_aset(opts, omit_nil_sym, oj_default_options.dump_opts.omit_nil ? Qtrue : Qfalse);
    rb_hash_aset(opts, oj_hash_class_sym, oj_default_options.hash_class);
    rb_hash_aset(opts, oj_array_class_sym, oj_default_options.array_class);

    if (NULL == oj_default_options.ignore) {
	rb_hash_aset(opts, ignore_sym, Qnil);
    } else {
	VALUE		*vp;
	volatile VALUE	a = rb_ary_new();

	for (vp = oj_default_options.ignore; Qnil != *vp; vp++) {
	    rb_ary_push(a, *vp);
	}
	rb_hash_aset(opts, ignore_sym, a);
    }
    return opts;
}

.default_options=(opts) ⇒ Object

Sets the default options for load and dump.

  • opts [Hash] options to change

    • :indent [Fixnum|String|nil] number of spaces to indent each element in a JSON document or the String to use for identation.

    • :circular [Boolean|nil] support circular references while dumping.

    • :auto_define [Boolean|nil] automatically define classes if they do not exist.

    • :symbol_keys [Boolean|nil] convert hash keys to symbols.

    • :class_cache [Boolean|nil] cache classes for faster parsing.

    • :escape [:newline|:json|:xss_safe|:ascii|unicode_xss|nil] mode encodes all high-bit characters as escaped sequences if :ascii, :json is standand UTF-8 JSON encoding, :newline is the same as :json but newlines are not escaped, :unicode_xss allows unicode but escapes &, <, and >, and any u20xx characters along with some others, and :xss_safe escapes &, <, and >, and some others.

    • :bigdecimal_as_decimal [Boolean|nil] dump BigDecimal as a decimal number or as a String.

    • :bigdecimal_load [:bigdecimal|:float|:auto|nil] load decimals as BigDecimal instead of as a Float. :auto pick the most precise for the number of digits.

    • :mode [:object|:strict|:compat|:null|:custom|:rails|:wab] load and dump mode to use for JSON :strict raises an exception when a non-supported Object is encountered. :compat attempts to extract variable values from an Object using to_json() or to_hash() then it walks the Object's variables if neither is found. The :object mode ignores to_hash() and to_json() methods and encodes variables using code internal to the Oj gem. The :null mode ignores non-supported Objects and replaces them with a null. The :custom mode honors all dump options. The :rails more mimics rails and Active behavior.

    • :time_format [:unix|:xmlschema|:ruby] time format when dumping in :compat mode :unix decimal number denoting the number of seconds since 1/1/1970, :unix_zone decimal number denoting the number of seconds since 1/1/1970 plus the utc_offset in the exponent, :xmlschema date-time format taken from XML Schema as a String, :ruby Time.to_s formatted String.

    • :create_id [String|nil] create id for json compatible object encoding

    • :create_additions [Boolean|nil] if true allow creation of instances using create_id on load.

    • :second_precision [Fixnum|nil] number of digits after the decimal when dumping the seconds portion of time.

    • :float_precision [Fixnum|nil] number of digits of precision when dumping floats, 0 indicates use Ruby.

    • :use_to_json [Boolean|nil] call to_json() methods on dump, default is false.

    • :use_as_json [Boolean|nil] call as_json() methods on dump, default is false.

    • :use_to_hash [Boolean|nil] call to_hash() methods on dump, default is false.

    • :use_raw_json [Boolean|nil] call raw_json() methods on dump, default is false.

    • :nilnil [Boolean|nil] if true a nil input to load will return nil and not raise an Exception.

    • :allow_gc [Boolean|nil] allow or prohibit GC during parsing, default is true (allow).

    • :quirks_mode [Boolean|nil] allow single JSON values instead of documents, default is true (allow).

    • :allow_invalid_unicode [Boolean|nil] allow invalid unicode, default is false (don't allow).

    • :allow_nan [Boolean|nil] allow Nan, Infinity, and -Infinity, default is true (allow).

    • :space [String|nil] String to use for the space after the colon in JSON object fields.

    • :space_before [String|nil] String to use before the colon separator in JSON object fields.

    • :object_nl [String|nil] String to use after a JSON object field value.

    • :array_nl [String|nil] String to use after a JSON array value

    • :nan [:null|:huge|:word|:raise] how to dump Infinity and NaN in null, strict, and compat mode. :null places a null, :huge places a huge number, :word places Infinity or NaN, :raise raises and exception, :auto uses default for each mode.

    • :hash_class [Class|nil] Class to use instead of Hash on load, :object_class can also be used.

    • :array_class [Class|nil] Class to use instead of Array on load.

    • :omit_nil [true|false] if true Hash and Object attributes with nil values are omitted.

    • :ignore [nil|Array] either nil or an Array of classes to ignore when dumping

    • :ignore_under [Boolean] if true then attributes that start with _ are ignored when dumping in object or custom mode.

    • :integer_range [Range] Dump integers outside range as strings.

    • :trace [Boolean] turn trace on or off.

    • :safe [Boolean] turn safe mimic on or off.


413
414
415
416
417
418
419
# File 'ext/oj/oj.c', line 413

static VALUE
set_def_opts(VALUE self, VALUE opts) {
    Check_Type(opts, T_HASH);
    oj_parse_options(opts, &oj_default_options);

    return Qnil;
}

.dump(obj, options = {}) ⇒ Object

Dumps an Object (obj) to a string.

  • obj [Object] Object to serialize as an JSON document String

  • options [Hash] same as default_options


1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
# File 'ext/oj/oj.c', line 1058

static VALUE
dump(int argc, VALUE *argv, VALUE self) {
    char		buf[4096];
    struct _out		out;
    struct _options	copts = oj_default_options;
    VALUE		rstr;

    if (1 > argc) {
	rb_raise(rb_eArgError, "wrong number of arguments (0 for 1).");
    }
    if (CompatMode == copts.mode) {
	copts.dump_opts.nan_dump = WordNan;
    }
    if (2 == argc) {
	oj_parse_options(argv[1], &copts);
    }
    if (CompatMode == copts.mode && copts.escape_mode != ASCIIEsc) {
	copts.escape_mode = JSONEsc;
    }
    out.buf = buf;
    out.end = buf + sizeof(buf) - 10;
    out.allocated = false;
    out.omit_nil = copts.dump_opts.omit_nil;
    out.caller = CALLER_DUMP;
    oj_dump_obj_to_json_using_params(*argv, &copts, &out, argc - 1,argv + 1);
    if (0 == out.buf) {
	rb_raise(rb_eNoMemError, "Not enough memory.");
    }
    rstr = rb_str_new2(out.buf);
    rstr = oj_encode(rstr);
    if (out.allocated) {
	xfree(out.buf);
    }
    return rstr;
}

.generate(obj, opts = nil) ⇒ Object

Encode obj as a JSON String. The obj argument must be a Hash, Array, or respond to to_h or to_json. Options other than those listed such as :allow_nan or :max_nesting are ignored.

  • obj [Object_|Hash|Array] object to convert to a JSON String

  • opts [Hash] options

    • :indent [String] String to use for indentation.

    • :space [String] String placed after a , or : delimiter

    • :space_before [String] String placed before a : delimiter

    • :object_nl [String] String placed after a JSON object

    • :array_nl [String] String placed after a JSON array

    • :ascii_only [Boolean] if not nil or false then use only ascii characters in the output. Note JSON.generate does support this even if it is not documented.

Returns [String]generated JSON.


1477
# File 'ext/oj/oj.c', line 1477

extern VALUE	oj_mimic_generate(int argc, VALUE *argv, VALUE self);

.generate(obj, opts = nil) ⇒ Object

Encode obj as a JSON String. The obj argument must be a Hash, Array, or respond to to_h or to_json. Options other than those listed such as :allow_nan or :max_nesting are ignored.

  • obj [Object_|Hash|Array] object to convert to a JSON String

  • opts [Hash] options

    • :indent [String] String to use for indentation.

    • :space [String] String placed after a , or : delimiter

    • :space_before [String] String placed before a : delimiter

    • :object_nl [String] String placed after a JSON object

    • :array_nl [String] String placed after a JSON array

    • :ascii_only [Boolean] if not nil or false then use only ascii characters in the output. Note JSON.generate does support this even if it is not documented.

Returns [String]generated JSON.


1477
# File 'ext/oj/oj.c', line 1477

extern VALUE	oj_mimic_generate(int argc, VALUE *argv, VALUE self);

.load(json, options = ) { ... } ⇒ Object

Parses a JSON document String into a Object, Hash, Array, String, Fixnum, Float, true, false, or nil according to the default mode or the mode specified. Raises an exception if the JSON is malformed or the classes specified are not valid. If the string input is not a valid JSON document (an empty string is not a valid JSON document) an exception is raised.

When used with a document that has multiple JSON elements the block, if any, will be yielded to. If no block then the last element read will be returned.

This parser operates on string and will attempt to load files into memory if a file object is passed as the first argument. A stream input will be parsed using a stream parser but others use the slightly faster string parser.

A block can be provided with a single argument. That argument will be the parsed JSON document. This is useful when parsing a string that includes multiple JSON documents. The block can take up to 3 arguments, the parsed object, the position in the string or stream of the start of the JSON for that object, and the length of the JSON for that object plus trailing whitespace.

  • json [String|IO] JSON String or an Object that responds to read()

  • options [Hash] load options (same as default_options)

  • obj [Hash|Array|String|Fixnum|Float|Boolean|nil] parsed object.

  • start [_optional, Integer] start position of parsed JSON for obj.

  • len [_optional, Integer] length of parsed JSON for obj.

Returns [Hash|Array|String|Fixnum|Float|Boolean|nil]

Yields:


841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
# File 'ext/oj/oj.c', line 841

static VALUE
load(int argc, VALUE *argv, VALUE self) {
    Mode	mode = oj_default_options.mode;

    if (1 > argc) {
	rb_raise(rb_eArgError, "Wrong number of arguments to load().");
    }
    if (2 <= argc) {
	VALUE	ropts = argv[1];
	VALUE	v;

	if (Qnil != ropts || CompatMode != mode) {
	    Check_Type(ropts, T_HASH);
	    if (Qnil != (v = rb_hash_lookup(ropts, mode_sym))) {
		if (object_sym == v) {
		    mode = ObjectMode;
		} else if (strict_sym == v) {
		    mode = StrictMode;
		} else if (compat_sym == v || json_sym == v) {
		    mode = CompatMode;
		} else if (null_sym == v) {
		    mode = NullMode;
		} else if (custom_sym == v) {
		    mode = CustomMode;
		} else if (rails_sym == v) {
		    mode = RailsMode;
		} else if (wab_sym == v) {
		    mode = WabMode;
		} else {
		    rb_raise(rb_eArgError, ":mode must be :object, :strict, :compat, :null, :custom, :rails, or :wab.");
		}
	    }
	}
    }
    switch (mode) {
    case StrictMode:
    case NullMode:
	return oj_strict_parse(argc, argv, self);
    case CompatMode:
    case RailsMode:
	return oj_compat_parse(argc, argv, self);
    case CustomMode:
	return oj_custom_parse(argc, argv, self);
    case WabMode:
	return oj_wab_parse(argc, argv, self);
    case ObjectMode:
    default:
	break;
    }
    return oj_object_parse(argc, argv, self);
}

.load_file(path, options = ) { ... } ⇒ Object

Parses a JSON document String into a Object, Hash, Array, String, Fixnum, Float, true, false, or nil according to the default mode or the mode specified. Raises an exception if the JSON is malformed or the classes specified are not valid. If the string input is not a valid JSON document (an empty string is not a valid JSON document) an exception is raised.

When used with a document that has multiple JSON elements the block, if any, will be yielded to. If no block then the last element read will be returned.

If the input file is not a valid JSON document (an empty file is not a valid JSON document) an exception is raised.

This is a stream based parser which allows a large or huge file to be loaded without pulling the whole file into memory.

A block can be provided with a single argument. That argument will be the parsed JSON document. This is useful when parsing a string that includes multiple JSON documents. The block can take up to 3 arguments, the parsed object, the position in the string or stream of the start of the JSON for that object, and the length of the JSON for that object plus trailing whitespace.

  • path [String] to a file containing a JSON document

  • options [Hash] load options (same as default_options)

  • obj [Hash|Array|String|Fixnum|Float|Boolean|nil] parsed object.

  • start [_optional, Integer] start position of parsed JSON for obj.

  • len [_optional, Integer] length of parsed JSON for obj.

Returns [Object|Hash|Array|String|Fixnum|Float|Boolean|nil]

Yields:


927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
# File 'ext/oj/oj.c', line 927

static VALUE
load_file(int argc, VALUE *argv, VALUE self) {
    char		*path;
    int			fd;
    Mode		mode = oj_default_options.mode;
    struct _parseInfo	pi;

    if (1 > argc) {
	rb_raise(rb_eArgError, "Wrong number of arguments to load().");
    }
    Check_Type(*argv, T_STRING);
    parse_info_init(&pi);
    pi.options = oj_default_options;
    pi.handler = Qnil;
    pi.err_class = Qnil;
    pi.max_depth = 0;
    if (2 <= argc) {
	VALUE	ropts = argv[1];
	VALUE	v;

	Check_Type(ropts, T_HASH);
	if (Qnil != (v = rb_hash_lookup(ropts, mode_sym))) {
	    if (object_sym == v) {
		mode = ObjectMode;
	    } else if (strict_sym == v) {
		mode = StrictMode;
	    } else if (compat_sym == v || json_sym == v) {
		mode = CompatMode;
	    } else if (null_sym == v) {
		mode = NullMode;
	    } else if (custom_sym == v) {
		mode = CustomMode;
	    } else if (rails_sym == v) {
		mode = RailsMode;
	    } else if (wab_sym == v) {
		mode = WabMode;
	    } else {
		rb_raise(rb_eArgError, ":mode must be :object, :strict, :compat, :null, :custom, :rails, or :wab.");
	    }
	}
    }
    path = StringValuePtr(*argv);
    if (0 == (fd = open(path, O_RDONLY))) {
	rb_raise(rb_eIOError, "%s", strerror(errno));
    }
    switch (mode) {
    case StrictMode:
    case NullMode:
	oj_set_strict_callbacks(&pi);
	return oj_pi_sparse(argc, argv, &pi, fd);
    case CustomMode:
	oj_set_custom_callbacks(&pi);
	return oj_pi_sparse(argc, argv, &pi, fd);
    case CompatMode:
    case RailsMode:
	oj_set_compat_callbacks(&pi);
	return oj_pi_sparse(argc, argv, &pi, fd);
    case WabMode:
	oj_set_wab_callbacks(&pi);
	return oj_pi_sparse(argc, argv, &pi, fd);
    case ObjectMode:
    default:
	break;
    }
    oj_set_object_callbacks(&pi);

    return oj_pi_sparse(argc, argv, &pi, fd);
}

.mimic_JSONObject

Creates the JSON module with methods and classes to mimic the JSON gem. After this method is invoked calls that expect the JSON module will use Oj instead and be faster than the original JSON. Most options that could be passed to the JSON methods are supported. The calls to set parser or generator will not raise an Exception but will not have any effect. The method can also be called after the json gem is loaded. The necessary methods on the json gem will be replaced with Oj methods.

Note that this also sets the default options of :mode to :compat and :encoding to :unicode_xss.

Returns [Module] the JSON module.


1457
# File 'ext/oj/oj.c', line 1457

extern VALUE	oj_define_mimic_json(int argc, VALUE *argv, VALUE self);

.mimic_loaded(mimic_paths = []) ⇒ Object

Loads mimic-ed JSON paths. Used by Oj.mimic_JSON().

Parameters:

  • mimic_paths (Array) (defaults to: [])

    additional paths to add to the Ruby loaded features.


35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
# File 'lib/oj/mimic.rb', line 35

def self.mimic_loaded(mimic_paths=[])
  $LOAD_PATH.each do |d|
    next unless File.exist?(d)

    jfile = File.join(d, 'json.rb')
    $LOADED_FEATURES << jfile unless $LOADED_FEATURES.include?(jfile) if File.exist?(jfile)
    
    Dir.glob(File.join(d, 'json', '**', '*.rb')).each do |file|
      # allow json/add/xxx to be loaded. User can override with Oj.add_to_json(xxx).
      $LOADED_FEATURES << file unless $LOADED_FEATURES.include?(file) unless file.include?('add')
    end
  end
  mimic_paths.each { |p| $LOADED_FEATURES << p }
  $LOADED_FEATURES << 'json' unless $LOADED_FEATURES.include?('json')

  require 'oj/json'

  if Object.const_defined?('OpenStruct')
    OpenStruct.class_eval do
      # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
      unless defined?(self.as_json)
        def as_json(*)
          name = self.class.name.to_s
          raise JSON::JSONError, "Only named structs are supported!" if 0 == name.length
          { JSON.create_id => name, 't' => table }
        end
      end
      def self.json_create(h)
        new(h['t'] || h[:t])
      end
    end
  end

  BigDecimal.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        {JSON.create_id => 'BigDecimal', 'b' => _dump }
      end
    end
    def self.json_create(h)
      BigDecimal._load(h['b'])
    end
  end

  Complex.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        {JSON.create_id => 'Complex', 'r' => real, 'i' => imag }
      end
    end
    def self.json_create(h)
      Complex(h['r'], h['i'])
    end
  end

  Date.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        { JSON.create_id => 'Date', 'y' => year, 'm' => month, 'd' => day, 'sg' => start }
      end
    end
    def self.json_create(h)
      civil(h['y'], h['m'], h['d'], h['sg'])
    end
  end

  DateTime.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        { JSON.create_id => 'DateTime',
          'y' => year,
          'm' => month,
          'd' => day,
          'H' => hour,
          'M' => min,
          'S' => sec,
          'of' => offset.to_s,
          'sg' => start }
      end
    end
    def self.json_create(h)
      # offset is a rational as a string
      as, bs = h['of'].split('/')
      a = as.to_i
      b = bs.to_i
      if 0 == b
        off = a
      else
        off = Rational(a, b)
      end
      civil(h['y'], h['m'], h['d'], h['H'], h['M'], h['S'], off, h['sg'])
    end
  end

  Date.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        { JSON.create_id => 'Date', 'y' => year, 'm' => month, 'd' => day, 'sg' => start }
      end
    end
    def self.json_create(h)
      civil(h['y'], h['m'], h['d'], h['sg'])
    end
  end

  Exception.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        {JSON.create_id => self.class.name, 'm' => message, 'b' => backtrace }
      end
    end
    def self.json_create(h)
      e = new(h['m'])
      e.set_backtrace(h['b'])
      e
    end
  end

  Range.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        {JSON.create_id => 'Range', 'a' => [first, last, exclude_end?]}
      end
    end
    def self.json_create(h)
      new(*h['a'])
    end
  end

  Rational.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        {JSON.create_id => 'Rational', 'n' => numerator, 'd' => denominator }
      end
    end
    def self.json_create(h)
      Rational(h['n'], h['d'])
    end
  end

  Regexp.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        {JSON.create_id => 'Regexp', 'o' => options, 's' => source }
      end
    end
    def self.json_create(h)
      new(h['s'], h['o'])
    end
  end

  Struct.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        name = self.class.name.to_s
        raise JSON::JSONError, "Only named structs are supported!" if 0 == name.length
        { JSON.create_id => name, 'v' => values }
      end
    end
    def self.json_create(h)
      new(*h['v'])
    end
  end

  Symbol.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        {JSON.create_id => 'Symbol', 's' => to_s }
      end
    end
    def self.json_create(h)
      h['s'].to_sym
    end
  end

  Time.class_eval do
    # Both the JSON gem and Rails monkey patch as_json. Let them battle it out.
    unless defined?(self.as_json)
      def as_json(*)
        nsecs = [ tv_usec * 1000 ]
        nsecs << tv_nsec if respond_to?(:tv_nsec)
        nsecs = nsecs.max
        { JSON.create_id => 'Time', 's' => tv_sec, 'n' => nsecs }
      end
    end
    def self.json_create(h)
      if usec = h.delete('u')
        h['n'] = usec * 1000
      end
      if instance_methods.include?(:tv_nsec)
        at(h['s'], Rational(h['n'], 1000))
      else
        at(h['s'], h['n'] / 1000)
      end
    end
  end

end

.object_load(json, options) { ... } ⇒ Object

Parses a JSON document String into an Object, Hash, Array, String, Fixnum, Float, true, false, or nil. In the :object mode the JSON should have been generated by Oj.dump(). The parser will reconstitute the original marshalled or dumped Object. The :auto_define and :circular options have meaning with this parsing mode.

Raises an exception if the JSON is malformed or the classes specified are not valid. If the input is not a valid JSON document (an empty string is not a valid JSON document) an exception is raised.

A block can be provided with a single argument. That argument will be the parsed JSON document. This is useful when parsing a string that includes multiple JSON documents. The block can take up to 3 arguments, the parsed object, the position in the string or stream of the start of the JSON for that object, and the length of the JSON for that object plus trailing whitespace.

  • json [String|IO] JSON String or an Object that responds to read().

  • options [Hash] load options (same as default_options).

  • obj [Hash|Array|String|Fixnum|Float|Boolean|nil] parsed object.

  • start [_optional, Integer] start position of parsed JSON for obj.

  • len [_optional, Integer] length of parsed JSON for obj.

Returns [Hash|Array|String|Fixnum|Float|Boolean|nil]

Yields:


1371
# File 'ext/oj/oj.c', line 1371

extern VALUE	oj_object_parse(int argc, VALUE *argv, VALUE self);

.optimize_railsObject

Sets the Oj as the Rails encoder and decoder. Oj::Rails.optimize is also called.


1484
# File 'ext/oj/oj.c', line 1484

extern VALUE	oj_optimize_rails(VALUE self);

.register_odd(clas, create_object, create_method, *members) ⇒ Object

Registers a class as special. This is useful for working around subclasses of primitive types as is done with ActiveSupport classes. The use of this function should be limited to just classes that can not be handled in the normal way. It is not intended as a hook for changing the output of all classes as it is not optimized for large numbers of classes.

  • clas [Class_|Module] Class or Module to be made special

  • create_object [Object] object to call the create method on

  • create_method [Symbol] method on the clas that will create a new instance of the clas when given all the member values in the order specified.

  • members [Symbol_|String] methods used to get the member values from instances of the clas.


1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
# File 'ext/oj/oj.c', line 1208

static VALUE
register_odd(int argc, VALUE *argv, VALUE self) {
    if (3 > argc) {
	rb_raise(rb_eArgError, "incorrect number of arguments.");
    }
    switch (rb_type(*argv)) {
    case T_CLASS:
    case T_MODULE:
	break;
    default:
	rb_raise(rb_eTypeError, "expected a class or module.");
	break;
    }
    Check_Type(argv[2], T_SYMBOL);
    if (MAX_ODD_ARGS < argc - 2) {
	rb_raise(rb_eArgError, "too many members.");
    }
    oj_reg_odd(argv[0], argv[1], argv[2], argc - 3, argv + 3, false);

    return Qnil;
}

.register_odd_raw(clas, create_object, create_method, dump_method) ⇒ Object

Registers a class as special and expect the output to be a string that can be included in the dumped JSON directly. This is useful for working around subclasses of primitive types as is done with ActiveSupport classes. The use of this function should be limited to just classes that can not be handled in the normal way. It is not intended as a hook for changing the output of all classes as it is not optimized for large numbers of classes. Be careful with this option as the JSON may be incorrect if invalid JSON is returned.

  • clas [Class|Module] Class or Module to be made special

  • create_object [Object] object to call the create method on

  • create_method [Symbol] method on the clas that will create a new instance of the clas when given all the member values in the order specified.

  • dump_method [Symbol|String] method to call on the object being serialized to generate the raw JSON.


1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
# File 'ext/oj/oj.c', line 1246

static VALUE
register_odd_raw(int argc, VALUE *argv, VALUE self) {
    if (3 > argc) {
	rb_raise(rb_eArgError, "incorrect number of arguments.");
    }
    switch (rb_type(*argv)) {
    case T_CLASS:
    case T_MODULE:
	break;
    default:
	rb_raise(rb_eTypeError, "expected a class or module.");
	break;
    }
    Check_Type(argv[2], T_SYMBOL);
    if (MAX_ODD_ARGS < argc - 2) {
	rb_raise(rb_eArgError, "too many members.");
    }
    oj_reg_odd(argv[0], argv[1], argv[2], 1, argv + 3, true);

    return Qnil;
}

.remove_to_jsonObject

Reverts back to the to_s dump behavior in :compat mode to instead use an optimized dump that includes the classname and attributes so that the object can be re-created on load. The format is the same as the json gem but does not use the ruby methods for encoding.

The classes supported for optimization are: Array, BigDecimal, Complex, Date, DateTime, Exception, Hash, Integer, OpenStruct, Range, Rational, Regexp, Struct, and Time. Providing no classes will result in all those classes being reverted from the optimized mode.

  • args [Class] zero or more classes to optimize.


1439
# File 'ext/oj/oj.c', line 1439

extern VALUE	oj_remove_to_json(int argc, VALUE *argv, VALUE self);

.safe_load(doc) ⇒ Object

Loads a JSON document in strict mode with :auto_define and :symbol_keys turned off. This function should be safe to use with JSON received on an unprotected public interface.

  • doc [String_|IO] JSON String or IO to load.

Returns [Hash|Array|String|Fixnum|Bignum|BigDecimal|nil|True|False]


1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
# File 'ext/oj/oj.c', line 1007

static VALUE
safe_load(VALUE self, VALUE doc) {
    struct _parseInfo	pi;
    VALUE		args[1];

    parse_info_init(&pi);
    pi.err_class = Qnil;
    pi.max_depth = 0;
    pi.options = oj_default_options;
    pi.options.auto_define = No;
    pi.options.sym_key = No;
    pi.options.mode = StrictMode;
    oj_set_strict_callbacks(&pi);
    *args = doc;

    return oj_pi_parse(1, args, &pi, 0, 0, 1);
}

.saj_parse(handler, io) ⇒ Object

Parses an IO stream or file containing a JSON document. Raises an exception if the JSON is malformed. This is a callback parser that calls the methods in the handler if they exist. A sample is the Oj::Saj class which can be used as a base class for the handler.

  • handler [Oj::Saj] responds to Oj::Saj methods

  • io [IO|String] IO Object to read from

.sc_parse(handler, io) ⇒ Object

Parses an IO stream or file containing a JSON document. Raises an exception if the JSON is malformed. This is a callback parser (Simple Callback Parser) that calls the methods in the handler if they exist. A sample is the Oj::ScHandler class which can be used as a base class for the handler. This callback parser is slightly more efficient than the Saj callback parser and requires less argument checking.

  • handler [Oj::ScHandler_] responds to Oj::ScHandler methods

  • io [IO_|String] IO Object to read from

.strict_load(json, options) { ... } ⇒ Object

Parses a JSON document String into an Hash, Array, String, Fixnum, Float, true, false, or nil. It parses using a mode that is strict in that it maps each primitive JSON type to a similar Ruby type. The :create_id is not honored in this mode. Note that a Ruby Hash is used to represent the JSON Object type. These two are not the same since the JSON Object type can have repeating entries with the same key and Ruby Hash can not.

When used with a document that has multiple JSON elements the block, if any, will be yielded to. If no block then the last element read will be returned.

Raises an exception if the JSON is malformed or the classes specified are not valid. If the input is not a valid JSON document (an empty string is not a valid JSON document) an exception is raised.

A block can be provided with a single argument. That argument will be the parsed JSON document. This is useful when parsing a string that includes multiple JSON documents. The block can take up to 3 arguments, the parsed object, the position in the string or stream of the start of the JSON for that object, and the length of the JSON for that object plus trailing whitespace.

  • json [String|IO] JSON String or an Object that responds to read().

  • options [Hash] load options (same as default_options).

  • obj [Hash|Array|String|Fixnum|Float|Boolean|nil] parsed object.

  • start [_optional, Integer] start position of parsed JSON for obj.

  • len [_optional, Integer] length of parsed JSON for obj.

Returns [Hash|Array|String|Fixnum|Float|Boolean|nil]

Yields:


1307
# File 'ext/oj/oj.c', line 1307

extern VALUE	oj_strict_parse(int argc, VALUE *argv, VALUE self);

.to_file(file_path, obj, options = {}) ⇒ Object

Dumps an Object to the specified file.

  • file [String] _path file path to write the JSON document to

  • obj [Object] Object to serialize as an JSON document String

  • options [Hash] formating options

    • :indent [Fixnum] format expected

    • :circular [Boolean] allow circular references, default: false


1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
# File 'ext/oj/oj.c', line 1159

static VALUE
to_file(int argc, VALUE *argv, VALUE self) {
    struct _options	copts = oj_default_options;

    if (3 == argc) {
	oj_parse_options(argv[2], &copts);
    }
    Check_Type(*argv, T_STRING);
    oj_write_obj_to_file(argv[1], StringValuePtr(*argv), &copts);

    return Qnil;
}

.to_json(obj, options) ⇒ Object

Dumps an Object (obj) to a string. If the object has a to_json method that will be called. The mode is set to :compat.

  • obj [Object] Object to serialize as an JSON document String

  • options [Hash]

    • :max_nesting [boolean] It true nesting is limited to 100. The option to detect circular references is available but is not compatible with the json gem., default is false

    • :allow_nan [boolean] If true non JSON compliant words such as Nan and Infinity will be used as appropriate, default is true.

    • :quirks_mode [boolean] Allow single JSON values instead of documents, default is true (allow).

    • :indent [String|nil] String to use for indentation, overriding the indent option if not nil.

    • :space [String|nil] String to use for the space after the colon in JSON object fields.

    • :space_before [String|nil] String to use before the colon separator in JSON object fields.

    • :object_nl [String|nil] String to use after a JSON object field value.

    • :array_nl [String|nil] String to use after a JSON array value.

    • :trace [Boolean] If true trace is turned on.

Returns [String] the encoded JSON.


1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
# File 'ext/oj/oj.c', line 1113

static VALUE
to_json(int argc, VALUE *argv, VALUE self) {
    char		buf[4096];
    struct _out		out;
    struct _options	copts = oj_default_options;
    VALUE		rstr;

    if (1 > argc) {
	rb_raise(rb_eArgError, "wrong number of arguments (0 for 1).");
    }
    copts.escape_mode = JXEsc;
    copts.dump_opts.nan_dump = RaiseNan;
    if (2 == argc) {
	oj_parse_mimic_dump_options(argv[1], &copts);
    }
    copts.mode = CompatMode;
    copts.to_json = Yes;
    out.buf = buf;
    out.end = buf + sizeof(buf) - 10;
    out.allocated = false;
    out.omit_nil = copts.dump_opts.omit_nil;
    // For obj.to_json or generate nan is not allowed but if called from dump
    // it is.
    oj_dump_obj_to_json_using_params(*argv, &copts, &out, argc - 1, argv + 1);

    if (0 == out.buf) {
	rb_raise(rb_eNoMemError, "Not enough memory.");
    }
    rstr = rb_str_new2(out.buf);
    rstr = oj_encode(rstr);
    if (out.allocated) {
	xfree(out.buf);
    }
    return rstr;
}

.to_stream(io, obj, options = {}) ⇒ Object

Dumps an Object to the specified IO stream.

  • io [IO] IO stream to write the JSON document to

  • obj [Object] Object to serialize as an JSON document String

  • options [Hash] formating options

    • :indent [Fixnum] format expected

    • :circular [Boolean] allow circular references, default: false


1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
# File 'ext/oj/oj.c', line 1182

static VALUE
to_stream(int argc, VALUE *argv, VALUE self) {
    struct _options	copts = oj_default_options;

    if (3 == argc) {
	oj_parse_options(argv[2], &copts);
    }
    oj_write_obj_to_stream(argv[1], *argv, &copts);

    return Qnil;
}

.wab_load(json, options) { ... } ⇒ Object

Parses a JSON document String into an Hash, Array, String, Fixnum, Float, true, false, or nil. It parses using a mode that is :wab in that it maps each primitive JSON type to a similar Ruby type. The :create_id is not honored in this mode. Note that a Ruby Hash is used to represent the JSON Object type. These two are not the same since the JSON Object type can have repeating entries with the same key and Ruby Hash can not.

When used with a document that has multiple JSON elements the block, if any, will be yielded to. If no block then the last element read will be returned.

Raises an exception if the JSON is malformed or the classes specified are not valid. If the input is not a valid JSON document (an empty string is not a valid JSON document) an exception is raised.

A block can be provided with a single argument. That argument will be the parsed JSON document. This is useful when parsing a string that includes multiple JSON documents. The block can take up to 3 arguments, the parsed object, the position in the string or stream of the start of the JSON for that object, and the length of the JSON for that object plus trailing whitespace.

  • json [String|IO] JSON String or an Object that responds to read().

  • options [Hash] load options (same as default_options).

  • obj [Hash|Array|String|Fixnum|Float|Boolean|nil] parsed object.

  • start [_optional, Integer] start position of parsed JSON for obj.

  • len [_optional, Integer] length of parsed JSON for obj.

Returns [Hash|Array|String|Fixnum|Float|Boolean|nil]

Yields:


1406
# File 'ext/oj/oj.c', line 1406

extern VALUE	oj_wab_parse(int argc, VALUE *argv, VALUE self);