public void Format_ReturnsFormattedLiteral()
{
// Arrange
IJsonObject j0 = JsonObject.FromString("{foo: 'fooval', bar :[], baz: { baz2: [0,1,2, {}] }}");
IJsonObject j1 = JsonObject.Builder().Build();
IJsonObject j2 = JsonObject.OfNull();
IJsonFormatOptions opts = JsonFormatOptions.Builder().Indent(true).NewLine("\n").Build();
// Act
string s0 = j0.Format(opts);
string s1 = j1.Format(opts);
string s2 = j2.Format(opts);
// Assert
Assert.AreEqual("{\n" +
"\t\"foo\" : \"fooval\",\n" +
"\t\"bar\" : [],\n" +
"\t\"baz\" : {\n" +
"\t\t\"baz2\" : [\n" +
"\t\t\t0,\n" +
"\t\t\t1,\n" +
"\t\t\t2,\n" +
"\t\t\t{}\n" +
"\t\t]\n" +
"\t}\n" +
"}", s0);
Assert.AreEqual("{}", s1);
Assert.AreEqual("null", s2);
}
private static void FormatHelperNewLine(IJsonFormatOptions opts, StringBuilder buff)
{
if (!opts.Indent)
{
return;
}
buff.Append(opts.NewLine);
}
/// <summary>
/// このJSONノードの整形されたリテラル表現を返します.
/// </summary>
/// <param name="opts">整形オプション.</param>
public string Format(IJsonFormatOptions opts)
{
if (opts.Indent)
{
StringBuilder buff = new StringBuilder();
FormatHelper(this, opts, buff, 0);
return(buff.ToString().TrimStart());
}
else
{
return(ToString());
}
}
public static void Main(string[] args)
{
// 1. Read JSON
// JsonObject.FromXxxx methods read JSON from String, File and Stream.
IJsonObject j1 = JsonObject.FromString("{foo: 123, bar: true, baz: \"hello\"}");
// IJsonObject#GetProperty() accesses JSON object's property.
// NOTE: GetPropery() and XxxxValue() methods have another version
// that can be specified fallback value.
Console.WriteLine("j1 = {0}", j1);
Console.WriteLine("foo = {0}", j1.GetProperty("foo").AsNumber());
Console.WriteLine("bar = {0}", j1.GetProperty("bar").AsBoolean());
Console.WriteLine("baz = {0}", j1.GetProperty("baz").AsString());
Console.WriteLine("baa exists? = {0}", j1.HasProperty("baa"));
// 2. Build JSON
// JsonObject.Builder() returns new builder instance.
IJsonObject j2 = JsonObject
.Builder()
.Append("foo", "hello")
.Append("bar", "hello", "bonjour", "こんにちは")
.Append("baz", (b) => {
// Lambda's argument is new builder
// instance for nested object.
b.Append("bazProp1", 1);
b.Append("bazProp2", 2);
})
.Build();
// The builder can be initialized with existed JSON.
IJsonObject j3 = JsonObject
.Builder(j2).Append("baa", 123).Build();
Console.WriteLine("j2 = {0}", j2);
Console.WriteLine("j3 = {0}", j3);
// 3. Format JSON
IJsonFormatOptions opts = JsonFormatOptions
.Builder()
.Indent(true).SoftTabs(true).TabWidth(2)
.Build();
Console.WriteLine("j3' = {0}", j3.Format(opts));
}
private static void FormatHelperIndent(IJsonFormatOptions opts, StringBuilder buff, int depth)
{
if (!opts.Indent || depth == 0)
{
return;
}
if (opts.SoftTabs)
{
for (int i = 0; i < opts.TabWidth * depth; i++)
{
buff.Append(' ');
}
}
else
{
for (int i = 0; i < depth; i++)
{
buff.Append('\t');
}
}
}
private static void FormatHelper(IJsonObject json,
IJsonFormatOptions opts,
StringBuilder buff,
int depth)
{
if (json.Type != JsonObjectType.Array && !json.TypeIs(JsonObjectType.Object))
{
buff.Append(json.ToString());
return;
}
if (json.Type == JsonObjectType.Array)
{
buff.Append('[');
bool empty = true;
foreach (IJsonObject item in json.AsArray())
{
if (empty)
{
empty = false;
}
else
{
buff.Append(',');
}
FormatHelperNewLine(opts, buff);
FormatHelperIndent(opts, buff, depth + 1);
FormatHelper(item, opts, buff, depth + 1);
}
if (!empty)
{
FormatHelperNewLine(opts, buff);
FormatHelperIndent(opts, buff, depth);
}
buff.Append(']');
}
else if (json.Type == JsonObjectType.Object)
{
buff.Append('{');
bool empty = true;
foreach (IJsonProperty p in json.Properties)
{
if (empty)
{
empty = false;
}
else
{
buff.Append(',');
}
FormatHelperNewLine(opts, buff);
FormatHelperIndent(opts, buff, depth + 1);
buff.Append(Quotes(p.Name)).Append(' ').Append(':').Append(' ');
FormatHelper(p.Value, opts, buff, depth + 1);
}
if (!empty)
{
FormatHelperNewLine(opts, buff);
FormatHelperIndent(opts, buff, depth);
}
buff.Append('}');
}
}
