/// <summary>
/// Returns the stored parameter value or, if none is set, the default value.
/// </summary>
/// <param name="parameterDescription"> Description of parameter to get value for. </param>
/// <returns> Parameter value or default one, if none was set before. </returns>
public object GetValueOrDefault(TaskParameterDescription parameterDescription)
{
if (this.taskDescription == null)
{
throw new InvalidOperationException("Can't get parameter value, because no task description was set.");
}
if (parameterDescription == null)
{
throw new NullReferenceException("Passed parameter description was null.");
}
if (!this.taskDescription.ParameterDescriptions.Contains(parameterDescription))
{
throw new ArgumentException(
string.Format(
"No parameter with description '{0}' found in task description.", parameterDescription.Name));
}
object value;
if (!this.parameterValues.TryGetValue(parameterDescription, out value))
{
value = parameterDescription.CreateDefaultValue();
}
return(value);
}
/// <summary>
/// The invoke parameter changed.
/// </summary>
/// <param name="parameterDescription"> The parameter description. </param>
private void InvokeParameterChanged(TaskParameterDescription parameterDescription)
{
ParameterChangedDelegate handler = this.ParameterChanged;
if (handler != null)
{
handler(this, parameterDescription);
}
}
/// <summary>
/// Tries to fetch the value of the parameter with the passed description.
/// </summary>
/// <typeparam name="T"> Expected type of value. </typeparam>
/// <param name="parameterDescription"> Parameter description. </param>
/// <param name="value"> Contains the value of the parameter with the passed description if found. </param>
/// <returns> True if the value for the parameter with the passed description was found; otherwise, false. </returns>
public bool TryGetValue <T>(TaskParameterDescription parameterDescription, ref T value)
{
object objectValue;
bool result = this.parameterValues.TryGetValue(parameterDescription, out objectValue);
if (result)
{
if (!(objectValue is T))
{
return(false);
}
value = (T)objectValue;
}
return(result);
}
/// <summary>
/// Sets the value for the parameter with the specified description.
/// </summary>
/// <param name="parameterDescription"> Description of parameter to set value for. </param>
/// <param name="value"> New parameter value. </param>
public void SetValue(TaskParameterDescription parameterDescription, object value)
{
// Check if task description contains parameter.
if (this.taskDescription == null)
{
throw new InvalidOperationException(
string.Format(
"Reference task '{0}' doesn't have a task description, couldn't set parameter value.", this.Name));
}
if (parameterDescription == null)
{
throw new NullReferenceException(
string.Format(
"Parameter description is null, couldn't set a value for it in reference task '{0}'.", this.Name));
}
if (!this.taskDescription.ParameterDescriptions.Contains(parameterDescription))
{
throw new ArgumentException(
string.Format(
"Task description of reference task '{0}' doesn't contain a parameter description '{1}'.",
this.Name,
parameterDescription.Name));
}
// Check if value changed.
object oldValue;
if (this.parameterValues.TryGetValue(parameterDescription, out oldValue) && value == oldValue)
{
return;
}
this.parameterValues[parameterDescription] = value;
// Invoke event.
this.InvokeParameterChanged(parameterDescription);
}
/// <summary>
/// Tries to fetch the value of the parameter with the passed description.
/// </summary>
/// <param name="parameterDescription"> Parameter description. </param>
/// <param name="objectValue"> Contains the value of the parameter with the passed description if found; otherwise the default value. </param>
/// <returns> True if the value for the parameter with the passed description was found; otherwise, false. </returns>
public bool TryGetValue(TaskParameterDescription parameterDescription, out object objectValue)
{
return(this.parameterValues.TryGetValue(parameterDescription, out objectValue));
}
/// <summary>
/// The read xml.
/// </summary>
/// <param name="reader"> The reader. </param>
public void ReadXml(XmlReader reader)
{
this.Name = string.Empty;
this.parameterValues.Clear();
if (reader.IsEmptyElement)
{
reader.ReadStartElement();
return;
}
reader.ReadStartElement();
while (reader.NodeType != XmlNodeType.EndElement)
{
if (reader.NodeType == XmlNodeType.Element)
{
string elementName = reader.Name;
if (elementName == "Name")
{
this.Name = reader.ReadElementString();
}
else if (elementName == "Child")
{
XmlWrapper wrapper = new XmlWrapper();
wrapper.ReadXml(reader);
this.DecoratorTask = wrapper.Task;
}
else if (this.taskDescription != null)
{
// Check if parameter.
TaskParameterDescription parameterDescription =
this.taskDescription.ParameterDescriptions.Find(desc => desc.ParameterName == elementName);
if (parameterDescription != null)
{
Type type = Type.GetType(parameterDescription.Type);
reader.ReadStartElement(parameterDescription.ParameterName);
XmlSerializer xmlSerializer = new XmlSerializer(type);
object value = xmlSerializer.Deserialize(reader);
reader.ReadEndElement();
this.parameterValues[parameterDescription] = value;
}
else
{
reader.Skip();
}
}
else
{
reader.Skip();
}
}
else
{
reader.Skip();
}
}
reader.ReadEndElement();
}
