Module: Oj

Defined in:
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/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 has several dump or serialization modes which control how Objects are converted to JSON. These modes are set with the :mode option in either the default options or as one of the options to the dump() method.

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

  • :null mode replaces any Object that is not one of the JSON 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 mode is is the compatible with other systems. It will serialize any Object but will check to see if the Object implements a to_hash() or to_json() method. If either exists that method is used for serializing the Object. The to_hash() is more flexible and produces more consistent output so it has a preference over the to_json() method. If neither the to_json() or to_hash() methods exist then the Oj internal Object variable encoding is used.

Defined Under Namespace

Classes: ActiveSupportHelper, Bag, CStack, DepthError, Doc, Error, LoadError, MimicError, ParseError, Saj, ScHandler, StreamWriter, StringWriter

Constant Summary collapse

VERSION =

Current version of the module.

'2.11.2'

Class Method Summary collapse

Class Method Details

.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.

.default_optionsHash

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

  • indent: [Fixnum] number of spaces to indent each element in an JSON document, zero is no newline between JSON elements, negative indicates no newline between top level JSON elements in a stream

  • circular: [true|false|nil] support circular references while dumping

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

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

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

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

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

  • time_format: [:unix|:xmlschema|:ruby] time format when dumping in :compat mode

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

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

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

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

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

  • allow_gc: [true|false|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)


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# File 'ext/oj/oj.c', line 206

static VALUE
get_def_opts(VALUE self) {
    VALUE opts = rb_hash_new();
    
    rb_hash_aset(opts, indent_sym, INT2FIX(oj_default_options.indent));
    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, use_to_json_sym, (Yes == oj_default_options.to_json) ? Qtrue : ((No == oj_default_options.to_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, allow_gc_sym, (Yes == oj_default_options.allow_gc) ? Qtrue : ((No == oj_default_options.allow_gc) ? Qfalse : Qnil));
    rb_hash_aset(opts, quirks_mode_sym, (Yes == oj_default_options.quirks_mode) ? Qtrue : ((No == oj_default_options.quirks_mode) ? Qfalse : Qnil));
    rb_hash_aset(opts, float_prec_sym, INT2FIX(oj_default_options.float_prec));
    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:
    default:    rb_hash_aset(opts, mode_sym, object_sym); break;
    }
    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;
    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 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 AutoDec:
    default:    rb_hash_aset(opts, bigdecimal_load_sym, auto_sym);  break;
    }
    rb_hash_aset(opts, create_id_sym, (0 == oj_default_options.create_id) ? Qnil : rb_str_new2(oj_default_options.create_id));

    return opts;
}

.default_options=(opts) ⇒ nil

Sets the default options for load and dump.


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# File 'ext/oj/oj.c', line 289

static VALUE
set_def_opts(VALUE self, VALUE opts) {
    struct _YesNoOpt  ynos[] = {
  { circular_sym, &oj_default_options.circular },
  { auto_define_sym, &oj_default_options.auto_define },
  { symbol_keys_sym, &oj_default_options.sym_key },
  { class_cache_sym, &oj_default_options.class_cache },
  { bigdecimal_as_decimal_sym, &oj_default_options.bigdec_as_num },
  { use_to_json_sym, &oj_default_options.to_json },
  { nilnil_sym, &oj_default_options.nilnil },
  { allow_gc_sym, &oj_default_options.allow_gc },
  { quirks_mode_sym, &oj_default_options.quirks_mode },
  { Qnil, 0 }
    };
    YesNoOpt  o;
    VALUE v;
    
    Check_Type(opts, T_HASH);
    v = rb_hash_aref(opts, indent_sym);
    if (Qnil != v) {
  Check_Type(v, T_FIXNUM);
  oj_default_options.indent = FIX2INT(v);
    }
    v = rb_hash_aref(opts, float_prec_sym);
    if (Qnil != v) {
  int  n;

  Check_Type(v, T_FIXNUM);
  n = FIX2INT(v);
  if (0 >= n) {
      *oj_default_options.float_fmt = '\0';
      oj_default_options.float_prec = 0;
  } else {
      if (20 < n) {
    n = 20;
      }
      sprintf(oj_default_options.float_fmt, "%%0.%dg", n);
      oj_default_options.float_prec = n;
  }
    }
    v = rb_hash_aref(opts, sec_prec_sym);
    if (Qnil != v) {
  int  n;

  Check_Type(v, T_FIXNUM);
  n = FIX2INT(v);
  if (0 > n) {
      n = 0;
  } else if (9 < n) {
      n = 9;
  }
  oj_default_options.sec_prec = n;
    }

    v = rb_hash_lookup(opts, mode_sym);
    if (Qnil == v) {
  // ignore
    } else if (object_sym == v) {
  oj_default_options.mode = ObjectMode;
    } else if (strict_sym == v) {
  oj_default_options.mode = StrictMode;
    } else if (compat_sym == v) {
  oj_default_options.mode = CompatMode;
    } else if (null_sym == v) {
  oj_default_options.mode = NullMode;
    } else {
  rb_raise(rb_eArgError, ":mode must be :object, :strict, :compat, or :null.");
    }

    v = rb_hash_lookup(opts, time_format_sym);
    if (Qnil == v) {
  // ignore
    } else if (unix_sym == v) {
  oj_default_options.time_format = UnixTime;
    } else if (xmlschema_sym == v) {
  oj_default_options.time_format = XmlTime;
    } else if (ruby_sym == v) {
  oj_default_options.time_format = RubyTime;
    } else {
  rb_raise(rb_eArgError, ":time_format must be :unix, :xmlschema, or :ruby.");
    }

    v = rb_hash_lookup(opts, escape_mode_sym);
    if (Qnil == v) {
  // ignore
    } else if (newline_sym == v) {
  oj_default_options.escape_mode = NLEsc;
    } else if (json_sym == v) {
  oj_default_options.escape_mode = JSONEsc;
    } else if (xss_safe_sym == v) {
  oj_default_options.escape_mode = XSSEsc;
    } else if (ascii_sym == v) {
  oj_default_options.escape_mode = ASCIIEsc;
    } else {
  rb_raise(rb_eArgError, ":escape_mode must be :newline, :json, :xss_safe, or :ascii.");
    }

    v = rb_hash_lookup(opts, bigdecimal_load_sym);
    if (Qnil == v) {
  // ignore
    } else if (bigdecimal_sym == v || Qtrue == v) {
  oj_default_options.bigdec_load = BigDec;
    } else if (float_sym == v) {
  oj_default_options.bigdec_load = FloatDec;
    } else if (auto_sym == v || Qfalse == v) {
  oj_default_options.bigdec_load = AutoDec;
    } else {
  rb_raise(rb_eArgError, ":bigdecimal_load must be :bigdecimal, :float, or :auto.");
    }

    if (Qtrue == rb_funcall(opts, rb_intern("has_key?"), 1, create_id_sym)) {
  if (0 != oj_default_options.create_id) {
      if (json_class != oj_default_options.create_id) {
    xfree((char*)oj_default_options.create_id);
      }
      oj_default_options.create_id = 0;
      oj_default_options.create_id_len = 0;
  }
  v = rb_hash_lookup(opts, create_id_sym);
  if (Qnil != v) {
      size_t len = RSTRING_LEN(v) + 1;

      oj_default_options.create_id = ALLOC_N(char, len);
      strcpy((char*)oj_default_options.create_id, StringValuePtr(v));
      oj_default_options.create_id_len = len - 1;
  }
    }

    for (o = ynos; 0 != o->attr; o++) {
  if (Qtrue != rb_funcall(opts, rb_intern("has_key?"), 1, o->sym)) {
      continue;
  }
  if (Qnil != (v = rb_hash_lookup(opts, o->sym))) {
      if (Qtrue == v) {
    *o->attr = Yes;
      } else if (Qfalse == v) {
    *o->attr = No;
      } else {
    rb_raise(rb_eArgError, "%s must be true, false, or nil.", rb_id2name(SYM2ID(o->sym)));
      }
  }
    }
    // This is here only for backwards compatibility with the original Oj.
    v = rb_hash_lookup(opts, ascii_only_sym);
    if (Qtrue == v) {
  oj_default_options.escape_mode = ASCIIEsc;
    } else if (Qfalse == v) {
  oj_default_options.escape_mode = JSONEsc;
    }
    return Qnil;
}

.dump(obj, options) ⇒ Object

Dumps an Object (obj) to a string.


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# File 'ext/oj/oj.c', line 858

static VALUE
dump(int argc, VALUE *argv, VALUE self) {
    char    buf[4096];
    struct _Out   out;
    struct _Options copts = oj_default_options;
    VALUE   rstr;
    
    if (2 == argc) {
  oj_parse_options(argv[1], &copts);
    }
    out.buf = buf;
    out.end = buf + sizeof(buf) - 10;
    out.allocated = 0;
    oj_dump_obj_to_json(*argv, &copts, &out);
    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;
}

.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.


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# File 'ext/oj/oj.c', line 692

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 != (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) {
    mode = CompatMode;
      } else if (null_sym == v) {
    mode = NullMode;
      } else {
    rb_raise(rb_eArgError, ":mode must be :object, :strict, :compat, or :null.");
      }
  }
    }
    switch (mode) {
    case StrictMode:
  return oj_strict_parse(argc, argv, self);
    case NullMode:
    case CompatMode:
  return oj_compat_parse(argc, argv, self);
    case ObjectMode:
    default:
  break;
    }
    return oj_object_parse(argc, argv, self);
}

.load_fileObject

call-seq: load_file(path, options) => Object, Hash, Array, String, Fixnum, Float, true, false, or nil

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.


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# File 'ext/oj/oj.c', line 752

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);
    pi.options = oj_default_options;
    pi.handler = Qnil;
    if (2 <= argc) {
  VALUE  ropts = argv[1];
  VALUE  v;

  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) {
    mode = CompatMode;
      } else if (null_sym == v) {
    mode = NullMode;
      } else {
    rb_raise(rb_eArgError, ":mode must be :object, :strict, :compat, or :null.");
      }
  }
    }
    path = StringValuePtr(*argv);
    if (0 == (fd = open(path, O_RDONLY))) {
  rb_raise(rb_eIOError, "%s", strerror(errno));
    }
    switch (mode) {
    case StrictMode:
  oj_set_strict_callbacks(&pi);
  return oj_pi_sparse(argc, argv, &pi, fd);
    case NullMode:
    case CompatMode:
  oj_set_compat_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

call-seq: mimic_JSON() => Module

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 :ascii.


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# File 'ext/oj/oj.c', line 1818

static VALUE
define_mimic_json(int argc, VALUE *argv, VALUE self) {
    VALUE ext;
    VALUE dummy;
  
    // Either set the paths to indicate JSON has been loaded or replaces the
    // methods if it has been loaded.
    if (rb_const_defined_at(rb_cObject, rb_intern("JSON"))) {
  mimic = rb_const_get_at(rb_cObject, rb_intern("JSON"));
    } else {
  mimic = rb_define_module("JSON");
    }
    if (rb_const_defined_at(mimic, rb_intern("Ext"))) {
  ext = rb_const_get_at(mimic, rb_intern("Ext"));
     } else {
  ext = rb_define_module_under(mimic, "Ext");
    }
    if (!rb_const_defined_at(ext, rb_intern("Parser"))) {
  dummy = rb_define_class_under(ext, "Parser", rb_cObject);
    }
    if (!rb_const_defined_at(ext, rb_intern("Generator"))) {
  dummy = rb_define_class_under(ext, "Generator", rb_cObject);
    }
    // convince Ruby that the json gem has already been loaded
    dummy = rb_gv_get("$LOADED_FEATURES");
    if (rb_type(dummy) == T_ARRAY) {
  rb_ary_push(dummy, rb_str_new2("json"));
  if (0 < argc) {
      VALUE  mimic_args[1];

      *mimic_args = *argv;
      rb_funcall2(Oj, rb_intern("mimic_loaded"), 1, mimic_args);
  } else {
      rb_funcall2(Oj, rb_intern("mimic_loaded"), 0, 0);
  }
    }
    dummy = rb_gv_get("$VERBOSE");
    rb_gv_set("$VERBOSE", Qfalse);
    rb_define_module_function(mimic, "parser=", no_op1, 1);
    rb_define_module_function(mimic, "generator=", no_op1, 1);
    rb_define_module_function(mimic, "create_id=", mimic_create_id, 1);

    rb_define_module_function(mimic, "dump", mimic_dump, -1);
    rb_define_module_function(mimic, "load", mimic_load, -1);
    rb_define_module_function(mimic, "restore", mimic_load, -1);
    rb_define_module_function(mimic, "recurse_proc", mimic_recurse_proc, 1);
    rb_define_module_function(mimic, "[]", mimic_dump_load, -1);

    rb_define_module_function(mimic, "generate", mimic_generate, -1);
    rb_define_module_function(mimic, "fast_generate", mimic_generate, -1);
    rb_define_module_function(mimic, "pretty_generate", mimic_pretty_generate, -1);
    /* for older versions of JSON, the deprecated unparse methods */
    rb_define_module_function(mimic, "unparse", mimic_generate, -1);
    rb_define_module_function(mimic, "fast_unparse", mimic_generate, -1);
    rb_define_module_function(mimic, "pretty_unparse", mimic_pretty_generate, -1);

    rb_define_module_function(mimic, "parse", mimic_parse, -1);
    rb_define_module_function(mimic, "parse!", mimic_parse, -1);

    rb_define_method(rb_cObject, "to_json", mimic_object_to_json, -1);

    rb_gv_set("$VERBOSE", dummy);

    array_nl_sym = ID2SYM(rb_intern("array_nl"));     rb_gc_register_address(&array_nl_sym);
    create_additions_sym = ID2SYM(rb_intern("create_additions")); rb_gc_register_address(&create_additions_sym);
    object_nl_sym = ID2SYM(rb_intern("object_nl"));     rb_gc_register_address(&object_nl_sym);
    space_before_sym = ID2SYM(rb_intern("space_before"));   rb_gc_register_address(&space_before_sym);
    space_sym = ID2SYM(rb_intern("space"));       rb_gc_register_address(&space_sym);
    symbolize_names_sym = ID2SYM(rb_intern("symbolize_names"));   rb_gc_register_address(&symbolize_names_sym);

    if (rb_const_defined_at(mimic, rb_intern("ParserError"))) {
  rb_funcall(mimic, rb_intern("remove_const"), 1, ID2SYM(rb_intern("ParserError")));
    }
    rb_define_const(mimic, "ParserError", oj_parse_error_class);

    if (!rb_const_defined_at(mimic, rb_intern("State"))) {
        rb_define_class_under(mimic, "State", rb_cObject);
    }

    oj_default_options = mimic_object_to_json_options;
    oj_default_options.to_json = Yes;

    return mimic;
}

.mimic_loaded(mimic_paths = []) ⇒ Object


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# File 'lib/oj/mimic.rb', line 4

def self.mimic_loaded(mimic_paths=[])
  $LOAD_PATH.each do |d|
    next unless File.exist?(d)
    offset = d.size() + 1
    Dir.glob(File.join(d, '**', '*.rb')).each do |file|
      next if file[offset..-1] !~ /^json[\/\\\.]{1}/
      $LOADED_FEATURES << file unless $LOADED_FEATURES.include?(file)
    end
  end
  mimic_paths.each { |p| $LOADED_FEATURES << p }
  $LOADED_FEATURES << 'json' unless $LOADED_FEATURES.include?('json')
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.

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.

Note: Oj is not able to automatically deserialize all classes that are a subclass of a Ruby Exception. Only exception that take one required string argument in the initialize() method are supported. This is an example of how to write an Exception subclass that supports both a single string intializer and an Exception as an argument. Additional optional arguments can be added as well.

The reason for this restriction has to do with a design decision on the part of the Ruby developers. Exceptions are special Objects. They do not follow the rules of other Objects. Exceptions have 'mesg' and a 'bt' attribute. Note that these are not '@mesg' and '@bt'. They can not be set using the normal C or Ruby calls. The only way I have found to set the 'mesg' attribute is through the initializer. Unfortunately that means any subclass that provides a different initializer can not be automatically decoded. A way around this is to use a create function but this example shows an alternative.

.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.


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# File 'ext/oj/oj.c', line 943

static VALUE
register_odd(int argc, VALUE *argv, VALUE self) {
    if (3 > argc) {
  rb_raise(rb_eArgError, "incorrect number of arguments.");
    }
    Check_Type(argv[0], T_CLASS);
    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);

    return Qnil;
}

.safe_load(doc) ⇒ Hash|Array|String|Fixnum|Bignum|BigDecimal|nil|True|False

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.


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# File 'ext/oj/oj.c', line 813

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

    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_parseObject

.sc_parseObject

.strict_load(json, options) ⇒ Hash, ...

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.

.to_file(file_path, obj, options) ⇒ Object

Dumps an Object to the specified file.


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# File 'ext/oj/oj.c', line 893

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_stream(io, obj, options) ⇒ Object

Dumps an Object to the specified IO stream.


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# File 'ext/oj/oj.c', line 915

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;
}