/// <summary>
/// Attempts to get an expression for an index parameter.
/// </summary>
/// <param name="indexes">The operation indexes parameter.</param>
/// <param name="expression">A <see cref="Expression"/> to be initialized to the index expression if the operation is successful, otherwise an error expression.</param>
/// <returns>true the operation is successful, false otherwise.</returns>
private static bool TryGetIndexExpression(DynamicMetaObject[] indexes, out Expression expression)
{
if (indexes.Length == 1 && indexes[0] != null && indexes[0].Value != null)
{
DynamicMetaObject index = indexes[0];
Type indexType = indexes[0].Value.GetType();
switch (Type.GetTypeCode(indexType))
{
case TypeCode.Char:
case TypeCode.Int16:
case TypeCode.UInt16:
case TypeCode.Byte:
case TypeCode.SByte:
Expression argExp = Expression.Convert(index.Expression, typeof(object));
Expression typeExp = Expression.Constant(typeof(int));
expression = Expression.Convert(Expression.Call(ChangeTypeMethodInfo, new Expression[] { argExp, typeExp }), typeof(int));
return(true);
case TypeCode.Int32:
case TypeCode.String:
expression = index.Expression;
return(true);
}
expression = Expression.Throw(Expression.Constant(new ArgumentException(SG.GetString(SR.InvalidIndexType, indexType))), typeof(object));
return(false);
}
expression = Expression.Throw(Expression.Constant(new ArgumentException(SG.GetString(SR.NonSingleNonNullIndexNotSupported))), typeof(object));
return(false);
}
/// <summary>
/// Implements dynamic cast for JsonValue types.
/// </summary>
/// <param name="binder">An instance of the <see cref="ConvertBinder"/> that represents the details of the dynamic operation.</param>
/// <returns>The new <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
public override DynamicMetaObject BindConvert(ConvertBinder binder)
{
if (binder == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentNullException("binder"));
}
Expression expression = this.Expression;
bool implicitCastSupported =
binder.Type.IsAssignableFrom(this.LimitType) ||
binder.Type == typeof(IEnumerable <KeyValuePair <string, JsonValue> >) ||
binder.Type == typeof(IDynamicMetaObjectProvider) ||
binder.Type == typeof(object);
if (!implicitCastSupported)
{
if (JsonValue.IsSupportedExplicitCastType(binder.Type))
{
Expression instance = Expression.Convert(this.Expression, this.LimitType);
expression = Expression.Call(CastValueMethodInfo.MakeGenericMethod(binder.Type), new Expression[] { instance });
}
else
{
string exceptionMessage = SG.GetString(SR.CannotCastJsonValue, this.LimitType.FullName, binder.Type.FullName);
expression = Expression.Throw(Expression.Constant(new InvalidCastException(exceptionMessage)), typeof(object));
}
}
expression = Expression.Convert(expression, binder.Type);
return(new DynamicMetaObject(expression, this.DefaultRestrictions));
}
/// <summary>
/// Adds a specified collection of key/value pairs to this instance.
/// </summary>
/// <param name="items">The collection of key/value pairs to add.</param>
/// <exception cref="System.ArgumentNullException">If items is null.</exception>
/// <exception cref="System.ArgumentException">If the value of any of the items in the collection
/// is a <see cref="System.Json.JsonValue"/> with <see cref="System.Json.JsonValue.JsonType"/> property of
/// value <see cref="F:System.Json.JsonType.Default"/>.</exception>
public void AddRange(IEnumerable <KeyValuePair <string, JsonValue> > items)
{
if (items == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("items");
}
if (this.ChangingListenersCount > 0)
{
foreach (KeyValuePair <string, JsonValue> item in items)
{
this.RaiseItemChanging(item.Value, JsonValueChange.Add, item.Key);
}
}
foreach (KeyValuePair <string, JsonValue> item in items)
{
if (item.Value != null && item.Value.JsonType == JsonType.Default)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SG.GetString(SR.UseOfDefaultNotAllowed));
}
this.values.Add(item.Key, item.Value);
this.RaiseItemChanged(item.Value, JsonValueChange.Add, item.Key);
}
}
/// <summary>
/// Adds the elements from a collection of type <see cref="System.Json.JsonValue"/> to this instance.
/// </summary>
/// <param name="items">Collection of items to add.</param>
/// <exception cref="System.ArgumentNullException">If items is null.</exception>
/// <exception cref="System.ArgumentException">If any of the items in the collection
/// is a <see cref="System.Json.JsonValue"/> with <see cref="System.Json.JsonValue.JsonType"/> property of
/// value <see cref="F:System.Json.JsonType.Default"/>.</exception>
public void AddRange(IEnumerable <JsonValue> items)
{
if (items == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("items");
}
if (this.ChangingListenersCount > 0)
{
int index = this.Count;
foreach (JsonValue toBeAdded in items)
{
this.RaiseItemChanging(toBeAdded, JsonValueChange.Add, index++);
}
}
foreach (JsonValue item in items)
{
if (item != null && item.JsonType == JsonType.Default)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SG.GetString(SR.UseOfDefaultNotAllowed));
}
this.values.Add(item);
this.RaiseItemChanged(item, JsonValueChange.Add, this.values.Count - 1);
}
}
/// <summary>
/// Insert a JSON CLR type into the array at a specified index.
/// </summary>
/// <param name="index">The zero-based index at which the item should be inserted.</param>
/// <param name="item">The <see cref="System.Json.JsonValue"/> object to insert.</param>
/// <exception cref="System.ArgumentOutOfRangeException">If index is less than zero or larger than
/// the size of the array.</exception>
/// <exception cref="System.ArgumentException">If the object to insert has a
/// <see cref="System.Json.JsonValue.JsonType"/> property of value
/// <see cref="F:System.Json.JsonType.Default"/>.</exception>
public void Insert(int index, JsonValue item)
{
if (item != null && item.JsonType == JsonType.Default)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SG.GetString(SR.UseOfDefaultNotAllowed));
}
this.RaiseItemChanging(item, JsonValueChange.Add, index);
this.values.Insert(index, item);
this.RaiseItemChanged(item, JsonValueChange.Add, index);
}
/// <summary>
/// Adds a key/value pair to this <see cref="System.Json.JsonObject"/> instance.
/// </summary>
/// <param name="key">The key for the element added.</param>
/// <param name="value">The <see cref="System.Json.JsonValue"/> for the element added.</param>
/// <exception cref="System.ArgumentException">If the value is a <see cref="System.Json.JsonValue"/>
/// with <see cref="System.Json.JsonValue.JsonType"/> property of
/// value <see cref="F:System.Json.JsonType.Default"/>.</exception>
public void Add(string key, JsonValue value)
{
if (value != null && value.JsonType == JsonType.Default)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SG.GetString(SR.UseOfDefaultNotAllowed));
}
this.RaiseItemChanging(value, JsonValueChange.Add, key);
this.values.Add(key, value);
this.RaiseItemChanged(value, JsonValueChange.Add, key);
}
/// <summary>
/// Gets or sets the value associated with the specified key.
/// </summary>
/// <param name="key">The key of the value to get or set.</param>
/// <returns>The <see cref="System.Json.JsonValue"/> associated to the specified key.</returns>
/// <exception cref="System.ArgumentNullException">If key is null.</exception>
/// <exception cref="System.ArgumentException">The property is set and the value is a
/// <see cref="System.Json.JsonValue"/> with <see cref="System.Json.JsonValue.JsonType"/>
/// property of value <see cref="F:System.Json.JsonType.Default"/>.</exception>
public override JsonValue this[string key]
{
get
{
if (key == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("key");
}
return(this.values[key]);
}
set
{
if (value != null && value.JsonType == JsonType.Default)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SG.GetString(SR.UseOfDefaultNotAllowed));
}
if (key == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("key");
}
bool replacement = this.values.ContainsKey(key);
JsonValue oldValue = null;
if (replacement)
{
oldValue = this.values[key];
this.RaiseItemChanging(value, JsonValueChange.Replace, key);
}
else
{
this.RaiseItemChanging(value, JsonValueChange.Add, key);
}
this.values[key] = value;
if (replacement)
{
this.RaiseItemChanged(oldValue, JsonValueChange.Replace, key);
}
else
{
this.RaiseItemChanged(value, JsonValueChange.Add, key);
}
}
}
public static JsonValue JXMLToJsonValue(string jsonString)
{
if (jsonString == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("jsonString");
}
if (jsonString.Length == 0)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new ArgumentException(SG.GetString(SR.JsonStringCannotBeEmpty), "jsonString"));
}
byte[] jsonBytes = Encoding.UTF8.GetBytes(jsonString);
return(JXMLToJsonValue(null, jsonBytes));
}
/// <summary>
/// Validates that this object contains a member with the given name.
/// </summary>
/// <param name="value">The <see cref="System.Json.JsonObject"/> to which the validation will be applied.</param>
/// <param name="key">The key of the member to search.</param>
/// <returns>This object, so that other validation operations can be chained.</returns>
/// <exception cref="System.ComponentModel.DataAnnotations.ValidationException">If the validation failed.</exception>
public static JsonObject ValidatePresence(this JsonObject value, string key)
{
if (value == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("value");
}
if (value.ContainsKey(key))
{
return(value);
}
else
{
ValidationResult failedResult = new ValidationResult(SG.GetString(SR.NamedValueNotPresent, key), new List <string> {
key
});
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ValidationException(failedResult, null, null));
}
}
/// <summary>
/// Gets or sets the JSON value at a specified index.
/// </summary>
/// <param name="index">The zero-based index of the element to get or set.</param>
/// <returns>The <see cref="System.Json.JsonValue"/> element at the specified index.</returns>
/// <exception cref="System.ArgumentOutOfRangeException">If index is not a valid index for this array.</exception>
/// <exception cref="System.ArgumentException">The property is set and the value is a
/// <see cref="System.Json.JsonValue"/> with <see cref="System.Json.JsonValue.JsonType"/>
/// property of value <see cref="F:System.Json.JsonType.Default"/>.</exception>
public override JsonValue this[int index]
{
get
{
return(this.values[index]);
}
set
{
if (value != null && value.JsonType == JsonType.Default)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument(SG.GetString(SR.UseOfDefaultNotAllowed));
}
JsonValue oldValue = this.values[index];
this.RaiseItemChanging(value, JsonValueChange.Replace, index);
this.values[index] = value;
this.RaiseItemChanged(oldValue, JsonValueChange.Replace, index);
}
}
/// <summary>
/// Returns an expression representing a 'throw' instruction based on the specified <see cref="OperationSupport"/> value.
/// </summary>
/// <param name="supportValue">The <see cref="OperationSupport"/> value.</param>
/// <param name="operation">The operation type.</param>
/// <param name="thisValue">The operation left operand.</param>
/// <param name="operand">The operation right operand.</param>
/// <returns>A <see cref="Expression"/> representing a 'throw' instruction.</returns>
private static Expression GetOperationErrorExpression(OperationSupport supportValue, ExpressionType operation, JsonValue thisValue, object operand)
{
string exceptionMessage;
string operandTypeName = operand != null?operand.GetType().FullName : "<null>";
switch (supportValue)
{
default:
case OperationSupport.NotSupported:
case OperationSupport.NotSupportedOnJsonType:
case OperationSupport.NotSupportedOnValueType:
exceptionMessage = SG.GetString(SR.OperatorNotDefinedForJsonType, operation, thisValue.JsonType);
break;
case OperationSupport.NotSupportedOnOperand:
exceptionMessage = SG.GetString(SR.OperatorNotAllowedOnOperands, operation, thisValue.GetType().FullName, operandTypeName);
break;
}
return(Expression.Throw(Expression.Constant(new InvalidOperationException(exceptionMessage)), typeof(object)));
}
public static JsonObject ValidateTypeOf <T>(this JsonObject value, string key)
{
if (value == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("value");
}
value.ValidatePresence(key);
T tempOfT;
if (!value[key].TryReadAs <T>(out tempOfT))
{
ValidationResult failedResult = new ValidationResult(SG.GetString(SR.NamedValueNotOfType, key, typeof(T).FullName), new List <string> {
key
});
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ValidationException(failedResult, null, null));
}
return(value);
}
public static JsonValue JXMLToJsonValue(XmlDictionaryReader jsonReader)
{
if (jsonReader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("jsonReader");
}
const string RootObjectName = "RootObject";
Stack <JsonValue> jsonStack = new Stack <JsonValue>();
string nodeType = null;
bool isEmptyElement = false;
JsonValue parent = new JsonObject();
jsonStack.Push(parent);
string currentName = RootObjectName;
try
{
MoveToRootNode(jsonReader);
while (jsonStack.Count > 0 && jsonReader.NodeType != XmlNodeType.None)
{
if (parent is JsonObject && currentName == null)
{
currentName = GetMemberName(jsonReader);
}
nodeType = jsonReader.GetAttribute(TypeAttributeName) ?? StringAttributeValue;
if (parent is JsonArray)
{
// For arrays, the element name has to be "item"
if (jsonReader.Name != ItemElementName)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new FormatException(SG.GetString(SR.IncorrectJsonFormat)));
}
}
switch (nodeType)
{
case NullAttributeValue:
case BooleanAttributeValue:
case StringAttributeValue:
case NumberAttributeValue:
JsonPrimitive jsonPrimitive = ReadPrimitive(nodeType, jsonReader);
InsertJsonValue(jsonStack, ref parent, ref currentName, jsonPrimitive, true);
break;
case ArrayAttributeValue:
JsonArray jsonArray = CreateJsonArray(jsonReader, ref isEmptyElement);
InsertJsonValue(jsonStack, ref parent, ref currentName, jsonArray, isEmptyElement);
break;
case ObjectAttributeValue:
JsonObject jsonObject = CreateObjectWithTypeHint(jsonReader, ref isEmptyElement);
InsertJsonValue(jsonStack, ref parent, ref currentName, jsonObject, isEmptyElement);
break;
default:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new FormatException(SG.GetString(SR.IncorrectJsonFormat)));
}
while (jsonReader.NodeType == XmlNodeType.EndElement && jsonStack.Count > 0)
{
jsonReader.Read();
SkipWhitespace(jsonReader);
jsonStack.Pop();
if (jsonStack.Count > 0)
{
parent = jsonStack.Peek();
}
}
}
}
catch (XmlException xmlException)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new FormatException(SG.GetString(SR.IncorrectJsonFormat), xmlException));
}
if (jsonStack.Count != 1)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new FormatException(SG.GetString(SR.IncorrectJsonFormat)));
}
return(parent[RootObjectName]);
}
private static JsonValue ConvertStringToJsonNumber(string value)
{
if (value.IndexOfAny(FloatingPointChars) < 0)
{
int intVal;
if (int.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out intVal))
{
return(intVal);
}
long longVal;
if (long.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out longVal))
{
return(longVal);
}
}
decimal decValue;
if (decimal.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out decValue) && decValue != 0)
{
return(decValue);
}
double dblValue;
if (double.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out dblValue))
{
return(dblValue);
}
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SG.GetString(SR.InvalidJsonPrimitive, value)));
}
private static void MoveToRootNode(XmlDictionaryReader jsonReader)
{
while (!jsonReader.EOF && (jsonReader.NodeType == XmlNodeType.None || jsonReader.NodeType == XmlNodeType.XmlDeclaration))
{
// read into <root> node
jsonReader.Read();
SkipWhitespace(jsonReader);
}
if (jsonReader.NodeType != XmlNodeType.Element || !string.IsNullOrEmpty(jsonReader.NamespaceURI) || jsonReader.Name != RootElementName)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new FormatException(SG.GetString(SR.IncorrectJsonFormat)));
}
}
private static string GetMemberName(XmlDictionaryReader jsonReader)
{
string name;
if (jsonReader.NamespaceURI == ItemElementName && jsonReader.LocalName == ItemElementName)
{
// JXML special case for names which aren't valid XML names
name = jsonReader.GetAttribute(ItemElementName);
if (name == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new FormatException(SG.GetString(SR.IncorrectJsonFormat)));
}
}
else
{
name = jsonReader.Name;
}
return(name);
}
private static JsonValue JXMLToJsonValue(Stream jsonStream, byte[] jsonBytes)
{
try
{
using (XmlDictionaryReader jsonReader = jsonStream != null ?
JsonReaderWriterFactory.CreateJsonReader(jsonStream, XmlDictionaryReaderQuotas.Max) :
JsonReaderWriterFactory.CreateJsonReader(jsonBytes, XmlDictionaryReaderQuotas.Max))
{
return(JXMLToJsonValue(jsonReader));
}
}
catch (XmlException)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new FormatException(SG.GetString(SR.IncorrectJsonFormat)));
}
}
