private static MethodMap DetermineBestMatch(IEnumerable <MethodBase> methods, bool mustUseAllParameters,
string[] paramNames, Type[] parameterTypes, object[] sampleParamValues)
{
MethodMap bestMap = null;
foreach (MethodBase method in methods)
{
MethodMap map = CreateMap(method, paramNames, parameterTypes, sampleParamValues, mustUseAllParameters);
if (map != null && map.IsValid)
{
bool isBetter = bestMap == null;
isBetter |= map.IsPerfectMatch;
isBetter |= bestMap != null &&
(map.Cost < bestMap.Cost ||
(map.Cost == bestMap.Cost && map.RequiredParameterCount > bestMap.RequiredParameterCount));
isBetter &= map.IsValid;
if (isBetter)
{
bestMap = map;
}
}
}
if (bestMap != null)
{
bestMap.InitializeInvoker();
return(bestMap);
}
return(null);
}
/// <summary>
/// Invoke the best available match for the supplied parameters. If no method can be called
/// using the supplied parameters, an exception is thrown.
/// </summary>
/// <param name="obj">The object on which to invoke a method.</param>
/// <param name="mustUseAllParameters">Specifies whether all supplied parameters must be used in the
/// invocation. Unless you know what you are doing you should pass true for this parameter.</param>
/// <param name="sample">The object whose public properties will be used as parameters.</param>
/// <returns>The return value of the invocation.</returns>
public object Invoke(object obj, bool mustUseAllParameters, object sample)
{
if (obj == null || sample == null)
{
throw new ArgumentException("Missing or invalid argument: " + (obj == null ? "obj" : "sample"));
}
var sourceInfo = SourceInfo.CreateFromType(sample.GetType());
// check to see if we already have a map for best match
MethodMap map = mapCache.Get(sourceInfo);
object[] values = sourceInfo.GetParameterValues(sample);
if (map == null)
{
string[] names = sourceInfo.ParamNames;
Type[] types = sourceInfo.ParamTypes;
if (names.Length != values.Length || names.Length != types.Length)
{
throw new ArgumentException("Mismatching name, type and value arrays (must be of identical length).");
}
map = MapFactory.DetermineBestMethodMatch(methodPool, mustUseAllParameters, names, types, values);
mapCache.Insert(sourceInfo, map);
}
bool isStatic = obj is Type;
return(isStatic ? map.Invoke(values) : map.Invoke(obj, values));
}
public static MethodMap PrepareInvoke(Type type, string[] paramNames, Type[] parameterTypes,
object[] sampleParamValues)
{
SourceInfo sourceInfo = new SourceInfo(type, paramNames, parameterTypes);
MethodMap map = ctorMapCache.Get(sourceInfo);
if (map == null)
{
map = DetermineBestConstructorMatch(type, paramNames, parameterTypes, sampleParamValues);
ctorMapCache.Insert(sourceInfo, map);
}
return(map);
}
internal static MethodMap DetermineBestConstructorMatch(Type type, string[] paramNames, Type[] parameterTypes,
object[] sampleParamValues)
{
MethodMap map = DetermineBestMatch(type.GetConstructors(), false, paramNames, parameterTypes, sampleParamValues);
if (map != null)
{
return(map);
}
var sb = new StringBuilder();
sb.AppendFormat("No constructor found for type {0} using parameters:{1}", type.Name, Environment.NewLine);
sb.AppendFormat("{0}{1}", string.Join(", ", Enumerable.Range(0, paramNames.Length).Select(i => string.Format("{0}:{1}", paramNames[i], parameterTypes[i])).ToArray()), Environment.NewLine);
throw new MissingMethodException(sb.ToString());
}
internal static MethodMap DetermineBestMethodMatch(IEnumerable <MethodBase> methods, bool mustUseAllParameters, string[] paramNames,
Type[] parameterTypes, object[] sampleParamValues)
{
MethodMap map = DetermineBestMatch(methods, mustUseAllParameters, paramNames, parameterTypes, sampleParamValues);
if (map != null)
{
return(map);
}
var sb = new StringBuilder();
sb.AppendFormat("No method found ({0} candidates examined) matching the parameters:{1}", methods.ToList().Count, Environment.NewLine);
//sb.AppendFormat( "{0}{1}", Format( parameters, "=", ", " ), Environment.NewLine );
sb.AppendFormat("{0}{1}", string.Join(", ", Enumerable.Range(0, paramNames.Length).Select(i => string.Format("{0}:{1}", paramNames[i], parameterTypes[i])).ToArray()), Environment.NewLine);
throw new MissingMethodException(sb.ToString());
}
/// <summary>
/// Invoke the best available match for the supplied parameters.
/// If no method can be called using the supplied parameters, an exception is thrown.
/// </summary>
/// <param name="obj">The object on which to invoke a method.</param>
/// <param name="mustUseAllParameters">Specifies whether all supplied parameters must be used in the
/// invocation. Unless you know what you are doing you should pass true for this parameter.</param>
/// <param name="parameters">A dictionary of parameter name/value pairs.</param>
/// <returns>The return value of the invocation.</returns>
public object Invoke(object obj, bool mustUseAllParameters, Dictionary <string, object> parameters)
{
if (obj == null || parameters == null)
{
throw new ArgumentException("Missing or invalid argument: " + (obj == null ? "obj" : "parameters"));
}
string[] names = parameters.Keys.ToArray() ?? new string[0];
object[] values = parameters.Values.ToArray() ?? new object[0];
Type[] types = values.ToTypeArray() ?? new Type[0];
bool isStatic = obj is Type;
var type = isStatic ? obj as Type : obj.GetType();
var sourceInfo = new SourceInfo(type, names, types);
// check to see if we already have a map for best match
MethodMap map = mapCache.Get(sourceInfo);
if (map == null)
{
map = MapFactory.DetermineBestMethodMatch(methodPool, mustUseAllParameters, names, types, values);
mapCache.Insert(sourceInfo, map);
}
return(isStatic ? map.Invoke(values) : map.Invoke(obj, values));
}