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JsonObject.cs
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JsonObject.cs
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using System;
using System.Collections.Generic;
using System.Globalization;
namespace Jannesen.FileFormat.Json
{
public class JsonObject: Dictionary<string, object?>, IJsonSerializer
{
public static JsonObject Parse(JsonReader reader)
{
ArgumentNullException.ThrowIfNull(reader);
var rtn = new JsonObject();
if (reader.ReadChar() != (int)'{')
throw new JsonReaderException("Expect '{'", reader);
var c= reader.SkipWhiteSpace();
while (c != (int)'}') {
{
var name = (c == (int)'\'' || c == (int)'"') ? reader.ReadString() : reader.ReadChars();
c = reader.SkipWhiteSpace();
if (c != ':')
throw new JsonReaderException("Expect ':'", reader);
reader.ReadChar();
rtn.Add(name, reader.ParseNode());
}
{
c = reader.SkipWhiteSpace();
if (c == (int)',') {
reader.ReadChar();
c = reader.SkipWhiteSpace();
}
else
if (c != (int)'}')
throw new JsonReaderException("Expect ',' or ']'", reader);
}
}
reader.ReadChar();
return rtn;
}
public JsonObject()
{
}
public JsonObject(int capacity): base(capacity)
{
}
public object GetValue(string name)
{
if (!TryGetValue(name, out var rtn))
throw new KeyNotFoundException("Unknown field '" + name + "' in JSON object.");
if (rtn == null) {
throw new FormatException("Field '" + name + "' = null.");
}
return rtn;
}
public object? GetValueNullable(string name)
{
TryGetValue(name, out var rtn);
return rtn;
}
public string GetValueString(string name)
{
var v = GetValue(name);
try {
return _convertToString(v);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public string? GetValueStringNullable(string name)
{
var v = GetValueNullable(name);
if (v == null)
return null;
try {
return _convertToString(v);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public bool GetValueBoolean(string name)
{
var v = GetValue(name);
try {
return _convertToBoolean(v);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public bool? GetValueBooleanNullable(string name)
{
var v = GetValueNullable(name);
if (v == null)
return null;
try {
return _convertToBoolean(v);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public byte GetValueByte(string name)
{
var v = GetValue(name);
try {
return Convert.ToByte(v, CultureInfo.InvariantCulture);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public byte? GetValueByteNullable(string name)
{
var v = GetValueNullable(name);
if (v == null)
return null;
try {
return Convert.ToByte(v, CultureInfo.InvariantCulture);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public Int16 GetValueInt16(string name)
{
var v = GetValue(name);
try {
return Convert.ToInt16(v, CultureInfo.InvariantCulture);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public Int16? GetValueInt16Nullable(string name)
{
var v = GetValueNullable(name);
if (v == null)
return null;
try {
return Convert.ToInt16(v, CultureInfo.InvariantCulture);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public int GetValueInt(string name)
{
var v = GetValue(name);
try {
return Convert.ToInt32(v, CultureInfo.InvariantCulture);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public int? GetValueIntNullable(string name)
{
var v = GetValueNullable(name);
if (v == null)
return null;
try {
return Convert.ToInt32(v, CultureInfo.InvariantCulture);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public Decimal GetValueDecimal(string name)
{
var v = GetValue(name);
try {
return Convert.ToDecimal(v, System.Globalization.NumberFormatInfo.InvariantInfo);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public Decimal? GetValueDecimalNullable(string name)
{
var v = GetValueNullable(name);
if (v == null)
return null;
try {
return Convert.ToDecimal(v, System.Globalization.NumberFormatInfo.InvariantInfo);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public double GetValueDouble(string name)
{
var v = GetValue(name);
try {
return Convert.ToDouble(v, System.Globalization.NumberFormatInfo.InvariantInfo);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public double? GetValueDoubleNullable(string name)
{
var v = GetValueNullable(name);
if (v == null)
return null;
try {
return Convert.ToDouble(v, System.Globalization.NumberFormatInfo.InvariantInfo);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public DateTime GetValueDateTime(string name)
{
var v = GetValueString(name);
try {
return _convertToDateTime(v);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public DateTime? GetValueDateTimeNullable(string name)
{
var v = GetValueStringNullable(name);
if (v == null)
return null;
try {
return _convertToDateTime(v);
}
catch(Exception) {
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
public JsonObject? GetValueObject(string name)
{
if (TryGetValue(name, out var v)) {
if (v != null) {
if (v is JsonObject o)
return o;
throw new FormatException("Invalid value JSON object field '" + name + "'.");
}
}
return null;
}
public JsonObject GetValueObjectRequired(string name)
{
return GetValueObject(name) ?? throw new FormatException("Missing JSON object field '" + name + "'.");
}
public JsonArray? GetValueArray(string name)
{
if (TryGetValue(name, out var v)) {
if (v != null) {
if (v is JsonArray a)
return a;
throw new FormatException("Invalid value JSON array field '" + name + "'.");
}
}
return null;
}
public JsonArray GetValueArrayRequired(string name)
{
return GetValueArray(name) ?? throw new FormatException("Missing JSON object field '" + name + "'.");
}
public void WriteTo(JsonWriter writer)
{
ArgumentNullException.ThrowIfNull(writer);
writer.WriteObject(this);
}
public override bool Equals(object? obj)
{
if (obj is JsonObject other) {
if (this.Count != other.Count) {
return false;
}
foreach(var entry in this) {
if (other.TryGetValue(entry.Key, out var othervalue)) {
if (entry.Value != null ? !entry.Value.Equals(othervalue) : othervalue == null) {
return false;
}
}
}
return true;
}
return false;
}
public override int GetHashCode()
{
var rtn = 0;
foreach(var e in this) {
rtn ^= e.Key.GetHashCode(StringComparison.Ordinal);
if (e.Value != null) {
rtn ^= e.Value.GetHashCode();
}
}
return rtn;
}
private static string _convertToString(object v)
{
if (v is string s) return s;
if (v is Int64 i) return i.ToString(CultureInfo.InvariantCulture);
throw new FormatException("Invalid string value");
}
private static bool _convertToBoolean(object v)
{
if (v is bool b) return b;
if (v is Int64 i) {
if (i == 0) return false;
if (i == 1) return true;
}
throw new FormatException("Invalid boolean value");
}
private static DateTime _convertToDateTime(string sValue)
{
var fieldpos = 0;
var fields = new int[7];
var factor = 0;
for (var pos = 0 ; pos<sValue.Length ; ++pos) {
var chr = sValue[pos];
if (chr>='0' && chr <='9') {
if (fieldpos<6)
fields[fieldpos] = fields[fieldpos]*10 + (chr-'0');
else {
fields[fieldpos] += (chr-'0')*factor;
factor /= 10;
}
}
else {
switch(fieldpos) {
case 0: // year
case 1: // month
if (chr!='-') goto invalid_date;
break;
case 2: // day
if (chr!='T') goto invalid_date;
break;
case 3: // hour
case 4: // minute
if (chr!=':') goto invalid_date;
break;
case 5: // second
if (chr!='.') goto invalid_date;
factor = 100;
break;
default:
invalid_date: throw new System.FormatException("Invalid date format.");
}
++fieldpos;
}
}
if (fields[1]<1 || fields[1]>12 ||
fields[2]<1 || fields[2]>31 ||
fields[3]>23 ||
fields[4]>59 ||
fields[5]>59)
throw new FormatException("Invalid date format.");
return new DateTime(fields[0], fields[1], fields[2], fields[3], fields[4], fields[5], fields[6]);
}
}
}