public JsValue CreateValue(Type targetType, JavaScriptValueSafeHandle valueHandle)
{
if (targetType == null)
{
throw new ArgumentNullException(nameof(targetType));
}
if (targetType.IsSubclassOf(typeof(JsValue)) == false)
{
throw new ArgumentOutOfRangeException(nameof(targetType));
}
if (valueHandle == JavaScriptValueSafeHandle.Invalid)
{
return(null);
}
return(m_valuePool.GetOrAdd(valueHandle, () =>
{
JsValue result;
if (typeof(JsObject).IsSameOrSubclass(targetType))
{
result = Activator.CreateInstance(targetType, new object[] { m_engine, Context, valueHandle }) as JsValue;
}
else if (typeof(JsExternalObject).IsSameOrSubclass(targetType))
{
//TODO: This isn't exactly true, we should set the ExternalData to the GCHandle.
//Then we can new JsExternalObject(m_engine, Context, valueHandle, Engine.GetExternalData(valueHandle));
throw new InvalidOperationException("External Objects must first be created by ...");
}
else if (typeof(JsBoolean) == targetType)
{
result = new JsBoolean(m_engine, Context, valueHandle);
}
else if (typeof(JsNumber) == targetType)
{
result = new JsNumber(m_engine, Context, valueHandle);
}
else if (typeof(JsString) == targetType)
{
result = new JsString(m_engine, Context, valueHandle);
}
else if (typeof(JsSymbol) == targetType)
{
result = new JsSymbol(m_engine, Context, valueHandle);
}
else if (typeof(JsUndefined) == targetType)
{
result = new JsUndefined(m_engine, Context, valueHandle);
}
else if (typeof(JsNull) == targetType)
{
result = new JsNull(m_engine, Context, valueHandle);
}
else
{
throw new InvalidOperationException($"Type {targetType} must subclass JsValue");
}
if (result == null)
{
throw new ArgumentOutOfRangeException(nameof(targetType), $"Unable to create an object of type {targetType}.");
}
result.BeforeCollect += JsValueBeforeCollectCallback;
return result;
}));
}
/// <summary>
/// Returns a new JavaScriptValue for the specified handle querying for the handle's value type.
/// </summary>
/// <remarks>
/// Use the valueType parameter carefully. If the resulting type does not match the handle type unexpected issues may occur.
/// </remarks>
/// <returns>The JavaScript Value that represents the handle</returns>
public JsValue CreateValue(JavaScriptValueSafeHandle valueHandle, JsValueType?valueType = null)
{
if (valueHandle == JavaScriptValueSafeHandle.Invalid)
{
return(null);
}
return(m_valuePool.GetOrAdd(valueHandle, () =>
{
if (valueType.HasValue == false)
{
valueType = m_engine.JsGetValueType(valueHandle);
}
JsValue result;
switch (valueType.Value)
{
case JsValueType.Array:
result = new JsArray(m_engine, Context, valueHandle);
break;
case JsValueType.ArrayBuffer:
result = new JsArrayBuffer(m_engine, Context, valueHandle);
break;
case JsValueType.Boolean:
result = new JsBoolean(m_engine, Context, valueHandle);
break;
case JsValueType.DataView:
result = new JsDataView(m_engine, Context, valueHandle);
break;
case JsValueType.Error:
result = new JsError(m_engine, Context, valueHandle);
break;
case JsValueType.Function:
result = new JsFunction(m_engine, Context, valueHandle);
break;
case JsValueType.Null:
result = new JsNull(m_engine, Context, valueHandle);
break;
case JsValueType.Number:
result = new JsNumber(m_engine, Context, valueHandle);
break;
case JsValueType.Object:
result = new JsObject(m_engine, Context, valueHandle);
break;
case JsValueType.String:
result = new JsString(m_engine, Context, valueHandle);
break;
case JsValueType.Symbol:
result = new JsSymbol(m_engine, Context, valueHandle);
break;
case JsValueType.TypedArray:
result = new JsTypedArray(m_engine, Context, valueHandle);
break;
case JsValueType.Undefined:
result = new JsUndefined(m_engine, Context, valueHandle);
break;
default:
throw new NotImplementedException($"Error Creating JavaScript Value: The JavaScript Value Type '{valueType}' is unknown, invalid, or has not been implemented.");
}
result.BeforeCollect += JsValueBeforeCollectCallback;
return result;
}));
}
