/// <summary>
/// Executes the specified expression.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="action">The action.</param>
/// <returns></returns>
protected T Execute <T>(Func <T> action)
{
DateTime before = DateTime.UtcNow;
#if !NETFX_CORE && !WP
this.Log.Debug($"Executing action '{action.Method().Name}'");
#endif
try
{
T result = action();
TimeSpan timeTaken = DateTime.UtcNow - before;
#if !NETFX_CORE && !WP
this.Log.Debug($"Action '{action.Method().Name}' executed. Took {timeTaken.TotalMilliseconds} ms.");
#endif
return(result);
}
catch (Exception ex)
{
#if !NETFX_CORE && !WP
this.Log.Error($"There was an error executing Action '{action.Method().Name}'. Message: {ex.Message}");
#endif
throw;
}
}
private static object EvaluateUnaryOperation(object argument, Func <Expression, Expression> expressionBuilderMethod, Type resultType)
{
string cacheKey = expressionBuilderMethod.Method().Name + "_" + resultType.Name;
Func <object, object> lambda;
lock (unaryDelegateCache)
{
if (!unaryDelegateCache.TryGetValue(cacheKey, out lambda))
{
lambda = GetUnaryEvaluationDelegate(expressionBuilderMethod, resultType);
unaryDelegateCache.Add(cacheKey, lambda);
}
}
argument = ChangeType(argument, resultType);
return(lambda(argument));
}
/// <summary>
/// Applies given arithmetic operation to two arguments and returns the result of the operation.
/// </summary>
/// <param name="leftArgument">First argument to the operation.</param>
/// <param name="rightArgument">Second argument to the operation.</param>
/// <param name="expressionBuilderMethod">Linq Expression builder method that describes the operation.</param>
/// <param name="commonType">Common CLR type for both input types (will be the type of the result of the operation)</param>
/// <returns>Result of arithmetic operation.</returns>
private static object EvaluateBinaryOperation(object leftArgument, object rightArgument, Func <Expression, Expression, Expression> expressionBuilderMethod, Type commonType)
{
string cacheKey = expressionBuilderMethod.Method().Name + "_" + commonType.Name;
Func <object, object, object> lambda;
lock (binaryDelegateCache)
{
if (!binaryDelegateCache.TryGetValue(cacheKey, out lambda))
{
lambda = GetBinaryEvaluationDelegate(expressionBuilderMethod, commonType);
binaryDelegateCache.Add(cacheKey, lambda);
}
}
leftArgument = ChangeType(leftArgument, commonType);
rightArgument = ChangeType(rightArgument, commonType);
return(lambda(leftArgument, rightArgument));
}
private static object EvaluateUnaryOperation(object argument, Func<Expression, Expression> expressionBuilderMethod, Type resultType)
{
string cacheKey = expressionBuilderMethod.Method().Name + "_" + resultType.Name;
Func<object, object> lambda;
lock (unaryDelegateCache)
{
if (!unaryDelegateCache.TryGetValue(cacheKey, out lambda))
{
lambda = GetUnaryEvaluationDelegate(expressionBuilderMethod, resultType);
unaryDelegateCache.Add(cacheKey, lambda);
}
}
argument = ChangeType(argument, resultType);
return lambda(argument);
}
/// <summary>
/// Applies given arithmetic operation to two arguments and returns the result of the operation.
/// </summary>
/// <param name="leftArgument">First argument to the operation.</param>
/// <param name="rightArgument">Second argument to the operation.</param>
/// <param name="expressionBuilderMethod">Linq Expression builder method that describes the operation.</param>
/// <param name="commonType">Common CLR type for both input types (will be the type of the result of the operation)</param>
/// <returns>Result of arithmetic operation.</returns>
private static object EvaluateBinaryOperation(object leftArgument, object rightArgument, Func<Expression, Expression, Expression> expressionBuilderMethod, Type commonType)
{
string cacheKey = expressionBuilderMethod.Method().Name + "_" + commonType.Name;
Func<object, object, object> lambda;
lock (binaryDelegateCache)
{
if (!binaryDelegateCache.TryGetValue(cacheKey, out lambda))
{
lambda = GetBinaryEvaluationDelegate(expressionBuilderMethod, commonType);
binaryDelegateCache.Add(cacheKey, lambda);
}
}
leftArgument = ChangeType(leftArgument, commonType);
rightArgument = ChangeType(rightArgument, commonType);
return lambda(leftArgument, rightArgument);
}
