The C++ framework for developing highly scalable, high performance servers on Windows platforms.

• Home
• What
• Why
• How
• Who
• Products
• Pricing
• Blog
• Contact

Search

StreamWriterBuilder Class Reference

Inheritance diagram for StreamWriterBuilder:

[legend]

Collaboration diagram for StreamWriterBuilder:

[legend]

List of all members.

---

Detailed Description

Build a StreamWriter implementation.

Usage:

  using namespace Json;
  Value value = ...;
  StreamWriterBuilder builder;
  builder.settings_["commentStyle"] = "None";
  builder.settings_["indentation"] = "   ";  // or whatever you like
  std::unique_ptr<JB_Json::StreamWriter> writer(
      builder.newStreamWriter());
  writer->write(value, &std::cout);
  std::cout << std::endl;  // add lf and flush

Public Member Functions
	StreamWriterBuilder ()
virtual	~StreamWriterBuilder ()
virtual StreamWriter *	newStreamWriter () const
	Exceptions: std::exception  if something goes wrong (e.g.
bool	validate (JB_Json::Value *invalid) const
	Returns: true if 'settings' are legal and consistent; otherwise, indicate bad settings via 'invalid'.
Static Public Member Functions
static void	setDefaults (JB_Json::Value *settings)
	Called by ctor, but you can use this to reset settings_.
Public Attributes
JB_Json::Value	settings_
	Configuration of this builder.

---

Constructor & Destructor Documentation

StreamWriterBuilder

(

)

~StreamWriterBuilder

(

)

[virtual]

---

Member Function Documentation

StreamWriter * newStreamWriter

(

)

const [virtual]

Exceptions:

std::exception

if something goes wrong (e.g.

invalid settings)

Implements StreamWriter::Factory.

bool validate

(

JB_Json::Value *

invalid

)

const

Returns:

true if 'settings' are legal and consistent; otherwise, indicate bad settings via 'invalid'.

void setDefaults

(

JB_Json::Value *

settings

)

[static]

Called by ctor, but you can use this to reset settings_.

Precondition:

'settings' != NULL (but JB_Json::null is fine)

Remarks:

Defaults: src/lib_json/json_writer.cpp StreamWriterBuilderDefaults

[StreamWriterBuilderDefaults]

[StreamWriterBuilderDefaults]

---

Member Data Documentation

JB_Json::Value settings_

Configuration of this builder.

Available settings (case-sensitive):

• "commentStyle": "None" or "All"
• "indentation": "<anything>"
• "enableYAMLCompatibility": false or true
  • slightly change the whitespace around colons
• "dropNullPlaceholders": false or true
  • Drop the "null" string from the writer's output for nullValues. Strictly speaking, this is not valid JSON. But when the output is being fed to a browser's Javascript, it makes for smaller output and the browser can handle the output just fine.

You can examine 'settings_` yourself to see the defaults. You can also write and read them just like any JSON Value.

See also:

setDefaults()

---