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