/// <summary>
/// Resolves original parameterized template into a string by replacing parameters with values provided as
/// a dictionary.
/// </summary>
/// <param name="parameters">Dictionary providing parameter values.</param>
/// <returns>Resolved string if succeeded.</returns>
/// <exception cref="InvalidOperationException">Thrown when required parameter value is not available.
/// </exception>
public string Bind(IReadOnlyDictionary <string, string> parameters)
{
StringBuilder builder = new StringBuilder();
if (_ignoreCase && parameters != null)
{
// convert to a case insensitive dictionary
var caseInsensitive = new Dictionary <string, string>(parameters.Count, StringComparer.OrdinalIgnoreCase);
foreach (var pair in parameters)
{
caseInsensitive.Add(pair.Key, pair.Value);
}
parameters = caseInsensitive;
}
foreach (BindingTemplateToken token in Tokens)
{
if (token.IsParameter)
{
string value;
BindingParameterResolver resolver = null;
if (parameters != null && parameters.TryGetValue(token.Value, out value))
{
// parameter is resolved from binding data
builder.Append(value);
}
else if (BindingParameterResolver.TryGetResolver(token.Value, out resolver))
{
// parameter maps to one of the built-in system binding
// parameters (e.g. rand-guid, datetime, etc.)
value = resolver.Resolve(token.Value);
builder.Append(value);
}
else
{
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, "No value for named parameter '{0}'.", token.Value));
}
}
else
{
builder.Append(token.Value);
}
}
return(builder.ToString());
}
public override string Evaluate(IReadOnlyDictionary <string, object> bindingData)
{
object current;
if (bindingData.TryGetValue(this._expressionParts[0], out current))
{
for (int i = 1; i < _expressionParts.Length; i++)
{
var propName = _expressionParts[i];
try
{
current = GetProperty(current, propName);
}
catch (Exception e)
{
throw new InvalidOperationException($"Error while accessing '{propName}': {e.Message}");
}
}
}
else
{
// Not found in binding data. Is this a builtin?
if (this._builtin != null)
{
current = _builtin.Resolve(this.ParameterName);
}
if (current == null)
{
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, "No value for named parameter '{0}'.", this.ParameterName));
}
}
var strValue = BindingDataPathHelper.ConvertParameterValueToString(current, _format);
return(strValue);
}
