bdljsn_writeoptions

Detailed Description

Outline

• Purpose
• Classes
• Description
  • Attributes
  • Usage
    • Example 1: Creating and Populating an Options Object

Purpose

Provide options for writing a JSON document.

Classes

• bdljsn::WriteOptions: options for writing a JSON document

See also

bdljsn_jsonutil, bdljsn_json

Description

This component provides a single, simply constrained (value-semantic) attribute class, bdljsn::WriteOptions, that is used to specify options for writing a JSON document (see bdljsn_jsonutil ).

Attributes

Name                Type          Default         Simple Constraints
------------------  -----------   -------         ------------------
initialIndentLevel  int           0               >= 0
sortMembers         bool          false           none
spacesPerLevel      int           4               >= 0
style               WriteStyle    e_COMPACT       none

• initialIndentLevel: initial indent level for the top-most element. If style is e_COMPACT, or spacesPerLevel is 0, this option is ignored.
• sortMembers: indicates whether the members of a object will be sorted in lexicographical order based on the member name.
• spacesPerLevel: spaces per indent level. If this option is 0, no indentation is used. If style is e_COMPACT or e_ONELINE, this option is ignored.
• style: the style used to encode the JSON data.

Usage

This section illustrates intended use of this component.

Example 1: Creating and Populating an Options Object

This component is designed to be used at a higher level to set the options for writing bdljsn::Json objects in JSON format. This example shows how to create and populate an options object.

First, we default-construct a bdljsn::WriteOptions object:

const int  INITIAL_INDENT_LEVEL     = 1;
const int  SPACES_PER_LEVEL         = 4;
 
bdljsn::WriteOptions options;
assert(0     == options.initialIndentLevel());
assert(4     == options.spacesPerLevel());
assert(false == options.sortMembers());
assert(bdljsn::WriteStyle::e_COMPACT == options.style());

Finally, we populate that object using a pre-defined initial indent level and spaces per level:

options.setInitialIndentLevel(INITIAL_INDENT_LEVEL);
assert(INITIAL_INDENT_LEVEL == options.initialIndentLevel());
 
options.setSpacesPerLevel(SPACES_PER_LEVEL);
assert(SPACES_PER_LEVEL == options.spacesPerLevel());