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JsonWriter: Refactor usage of StringBuilder.

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This commit is contained in:
Valeriano A.R.
2019-11-24 15:45:28 +01:00
parent 2f81aaa73c
commit 814800200f
1 changed files with 74 additions and 64 deletions
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138
VAR.Json/JsonWriter.cs
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@@ -101,52 +101,52 @@ namespace VAR.Json
return false;
}
private void WriteIndent(TextWriter sbOutput, int level)
private void WriteIndent(TextWriter textWriter, int level)
{
if (!_config.Indent)
{
return;
}
sbOutput.Write('\n');
textWriter.Write('\n');
if (_config.UseTabForIndent)
{
for (int i = 0; i < level; i++) { sbOutput.Write('\t'); }
for (int i = 0; i < level; i++) { textWriter.Write('\t'); }
}
else
{
int n = level * _config.IndentChars;
for (int i = 0; i < n; i++) { sbOutput.Write(' '); }
for (int i = 0; i < n; i++) { textWriter.Write(' '); }
}
}
private void WriteString(TextWriter sbOutput, string str)
private void WriteString(TextWriter textWriter, string str)
{
sbOutput.Write('"');
textWriter.Write('"');
char c;
int n = str.Length;
for (int i = 0; i < n; i++)
{
c = str[i];
if (c == '"') { sbOutput.Write("\\\""); }
else if (c == '\\') { sbOutput.Write("\\\\"); }
else if (c == '/') { sbOutput.Write("\\/"); }
else if (c == '\b') { sbOutput.Write("\\b"); }
else if (c == '\f') { sbOutput.Write("\\f"); }
else if (c == '\n') { sbOutput.Write("\\n"); }
else if (c == '\r') { sbOutput.Write("\\r"); }
else if (c == '\t') { sbOutput.Write("\\t"); }
else if (c < 32 || c >= 127) { sbOutput.Write("\\u{0:X04}", (int)c); }
else { sbOutput.Write(c); }
if (c == '"') { textWriter.Write("\\\""); }
else if (c == '\\') { textWriter.Write("\\\\"); }
else if (c == '/') { textWriter.Write("\\/"); }
else if (c == '\b') { textWriter.Write("\\b"); }
else if (c == '\f') { textWriter.Write("\\f"); }
else if (c == '\n') { textWriter.Write("\\n"); }
else if (c == '\r') { textWriter.Write("\\r"); }
else if (c == '\t') { textWriter.Write("\\t"); }
else if (c < 32 || c >= 127) { textWriter.Write("\\u{0:X04}", (int)c); }
else { textWriter.Write(c); }
}
sbOutput.Write('"');
textWriter.Write('"');
}
private void WriteValue(TextWriter sbOutput, object obj, List<object> parentLevels, bool useReflection)
private void WriteValue(TextWriter textWriter, object obj, List<object> parentLevels, bool useReflection)
{
if (obj == null || obj is DBNull)
{
// NULL
sbOutput.Write("null");
textWriter.Write("null");
}
else if (
(obj is float) ||
@@ -157,50 +157,50 @@ namespace VAR.Json
false)
{
// Numbers
sbOutput.Write(obj.ToString());
textWriter.Write(obj.ToString());
}
else if (obj is string)
{
// Strings
WriteString(sbOutput, (string)obj);
WriteString(textWriter, (string)obj);
}
else if (obj is bool)
{
// Booleans
sbOutput.Write(((bool)obj) ? "true" : "false");
textWriter.Write(((bool)obj) ? "true" : "false");
}
else if (obj is DateTime)
{
// DateTime
sbOutput.Write('"');
sbOutput.Write(((DateTime)obj).ToString("yyyy-MM-ddTHH:mm:ssZ"));
sbOutput.Write('"');
textWriter.Write('"');
textWriter.Write(((DateTime)obj).ToString("yyyy-MM-ddTHH:mm:ssZ"));
textWriter.Write('"');
}
else if (obj is IDictionary)
{
// Objects
WriteObject(sbOutput, obj, parentLevels);
WriteObject(textWriter, obj, parentLevels);
}
else if (obj is IEnumerable)
{
// Array/List
WriteList(sbOutput, obj, parentLevels);
WriteList(textWriter, obj, parentLevels);
}
else
{
if (useReflection)
{
// Reflected object
WriteReflectedObject(sbOutput, obj, parentLevels);
WriteReflectedObject(textWriter, obj, parentLevels);
}
else
{
WriteString(sbOutput, Convert.ToString(obj));
WriteString(textWriter, Convert.ToString(obj));
}
}
}
private void WriteList(TextWriter sbOutput, object obj, List<object> parentLevels)
private void WriteList(TextWriter textWriter, object obj, List<object> parentLevels)
{
IEnumerable list = (IEnumerable)obj;
int n = 0;
@@ -219,40 +219,40 @@ namespace VAR.Json
// Empty
if (n == 0)
{
sbOutput.Write("[ ]");
textWriter.Write("[ ]");
return;
}
// Write array
bool first = true;
sbOutput.Write("[ ");
textWriter.Write("[ ");
if (!isLeaf || n > _config.IndentThresold)
{
WriteIndent(sbOutput, parentLevels.Count + 1);
WriteIndent(textWriter, parentLevels.Count + 1);
}
foreach (object childObj in list)
{
if (!first)
{
sbOutput.Write(", ");
textWriter.Write(", ");
if (!isLeaf || n > _config.IndentThresold)
{
WriteIndent(sbOutput, parentLevels.Count + 1);
WriteIndent(textWriter, parentLevels.Count + 1);
}
}
first = false;
parentLevels.Add(obj);
WriteValue(sbOutput, childObj, parentLevels, true);
WriteValue(textWriter, childObj, parentLevels, true);
parentLevels.Remove(obj);
}
if (!isLeaf || n > _config.IndentThresold)
{
WriteIndent(sbOutput, parentLevels.Count);
WriteIndent(textWriter, parentLevels.Count);
}
sbOutput.Write(" ]");
textWriter.Write(" ]");
}
private void WriteObject(TextWriter sbOutput, object obj, List<object> parentLevels)
private void WriteObject(TextWriter textWriter, object obj, List<object> parentLevels)
{
IDictionary map = (IDictionary)obj;
int n = map.Count;
@@ -260,7 +260,7 @@ namespace VAR.Json
// Empty
if (map.Count == 0)
{
sbOutput.Write("{ }");
textWriter.Write("{ }");
return;
}
@@ -277,37 +277,37 @@ namespace VAR.Json
// Write object
bool first = true;
sbOutput.Write("{ ");
textWriter.Write("{ ");
if (!isLeaf || n > _config.IndentThresold)
{
WriteIndent(sbOutput, parentLevels.Count + 1);
WriteIndent(textWriter, parentLevels.Count + 1);
}
foreach (object key in map.Keys)
{
object value = map[key];
if (!first)
{
sbOutput.Write(", ");
textWriter.Write(", ");
if (!isLeaf || n > _config.IndentThresold)
{
WriteIndent(sbOutput, parentLevels.Count + 1);
WriteIndent(textWriter, parentLevels.Count + 1);
}
}
first = false;
WriteString(sbOutput, Convert.ToString(key));
sbOutput.Write(": ");
WriteString(textWriter, Convert.ToString(key));
textWriter.Write(": ");
parentLevels.Add(obj);
WriteValue(sbOutput, value, parentLevels, true);
WriteValue(textWriter, value, parentLevels, true);
parentLevels.Remove(obj);
}
if (!isLeaf || n > _config.IndentThresold)
{
WriteIndent(sbOutput, parentLevels.Count);
WriteIndent(textWriter, parentLevels.Count);
}
sbOutput.Write(" }");
textWriter.Write(" }");
}
private void WriteReflectedObject(TextWriter sbOutput, object obj, List<object> parentLevels)
private void WriteReflectedObject(TextWriter textWriter, object obj, List<object> parentLevels)
{
Type type = obj.GetType();
PropertyInfo[] rawProperties = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
@@ -323,7 +323,7 @@ namespace VAR.Json
// Empty
if (n == 0)
{
sbOutput.Write("{ }");
textWriter.Write("{ }");
return;
}
@@ -341,10 +341,10 @@ namespace VAR.Json
// Write object
bool first = true;
sbOutput.Write("{ ");
textWriter.Write("{ ");
if (!isLeaf || n > _config.IndentThresold)
{
WriteIndent(sbOutput, parentLevels.Count + 1);
WriteIndent(textWriter, parentLevels.Count + 1);
}
foreach (PropertyInfo property in properties)
{
@@ -357,42 +357,52 @@ namespace VAR.Json
}
if (!first)
{
sbOutput.Write(", ");
textWriter.Write(", ");
if (!isLeaf || n > _config.IndentThresold)
{
WriteIndent(sbOutput, parentLevels.Count + 1);
WriteIndent(textWriter, parentLevels.Count + 1);
}
}
first = false;
WriteString(sbOutput, property.Name);
sbOutput.Write(": ");
WriteString(textWriter, property.Name);
textWriter.Write(": ");
parentLevels.Add(obj);
if (value != obj && parentLevels.Contains(value) == false)
{
WriteValue(sbOutput, value, parentLevels, false);
WriteValue(textWriter, value, parentLevels, false);
}
else
{
WriteValue(sbOutput, null, parentLevels, false);
WriteValue(textWriter, null, parentLevels, false);
}
parentLevels.Remove(obj);
}
if (!isLeaf || n > _config.IndentThresold)
{
WriteIndent(sbOutput, parentLevels.Count);
WriteIndent(textWriter, parentLevels.Count);
}
sbOutput.Write(" }");
textWriter.Write(" }");
}
#endregion Private methods
#region Public methods
public TextWriter Write(object obj, TextWriter textWriter)
{
if (textWriter == null)
{
textWriter = new StringWriter();
}
WriteValue(textWriter, obj, new List<object>(), true);
return textWriter;
}
public string Write(object obj)
{
StringWriter sbOutput = new StringWriter();
WriteValue(sbOutput, obj, new List<object>(), true);
return sbOutput.ToString();
StringWriter textWriter = new StringWriter();
WriteValue(textWriter, obj, new List<object>(), true);
return textWriter.ToString();
}
private static Dictionary<JsonWriterConfiguration, JsonWriter> _dictInstances = new Dictionary<JsonWriterConfiguration, JsonWriter>();