/// <summary>
/// Finds the code examples in a given assembly.
/// </summary>
/// <param name="assembly">The assembly to search for.</param>
/// <param name="typesToExclude">List of types to exclude.</param>
public void LoadCodeExamples(Assembly assembly, SystemType[] typesToExclude)
{
lock (codeExampleMap)
{
codeExampleMap.Clear();
SystemType[] types = assembly.GetTypes();
foreach (SystemType type in types)
{
if (type.IsSubclassOf(typeof(ExampleBase)) && !typesToExclude.Contains(type))
{
ExampleBase example = (ExampleBase)Activator.CreateInstance(type);
codeExampleMap.Add(example.Name, example);
}
}
}
}
/// <summary>
/// Finds the code examples.
/// </summary>
/// <param name="assembly">The assembly.</param>
public void LoadCodeExamples(Assembly assembly)
{
SystemType[] types = assembly.GetTypes();
ExampleBase codeExample = null;
foreach (SystemType type in types)
{
if (type.IsSubclassOf(typeof(ExampleBase)))
{
ExampleBase example = (ExampleBase)Activator.CreateInstance(type);
if (!codeExampleMap.TryGetValue(example.Name, out codeExample))
{
codeExampleMap.Add(example.Name, example);
}
}
}
}
/// <summary>
/// Gets the flags from <code>Run</code> method signature of a code example.
/// </summary>
/// <param name="codeExample">The code example.</param>
/// <returns>A list of flags for running this code example.</returns>
private static Flag[] GetFlagsFromRunMethodSignature(ExampleBase codeExample)
{
// Get the Run method.
MethodInfo runMethod = GetRunMethod(codeExample);
if (runMethod == null)
{
throw new MissingMethodException(
$"Run method is missing in the example: {codeExample.Name}.");
}
List<Flag> retval = new List<Flag>();
// Skip one parameter, since the first parameter is the GoogleAdsClient.
foreach(ParameterInfo parameterInfo in runMethod.GetParameters().Skip(1))
{
retval.Add(Flags.FromParameterInfo(parameterInfo));
}
return retval.ToArray();
}
/// <summary>
/// Runs the specified example name.
/// </summary>
/// <param name="exampleName">Name of the example.</param>
/// <param name="session">The session.</param>
/// <param name="args">The arguments.</param>
/// <exception cref="KeyNotFoundException">Thrown if the example with the specified name
/// is not found.</exception>
public void Run(string exampleName, GoogleAdsClient session, IEnumerable <string> args)
{
ExampleBase codeExample = null;
string[] splits = exampleName.Split('.');
string exampleNameWithoutVersion = null;
if (splits.Length == 2)
{
exampleNameWithoutVersion = splits[1];
}
if (codeExampleMap.ContainsKey(exampleName))
{
codeExample = codeExampleMap[exampleName];
}
else if (!string.IsNullOrEmpty(exampleNameWithoutVersion) &&
codeExampleMap.ContainsKey(exampleNameWithoutVersion))
{
codeExample = codeExampleMap[exampleNameWithoutVersion];
}
if (codeExample != null)
{
Console.WriteLine($"Requested: '{exampleName}', Loaded: '{codeExample.VersionedName}'.");
}
else
{
throw new KeyNotFoundException($"Code example not found: '{exampleName}'.");
}
Console.WriteLine(codeExample.Description);
Flag[] flags = GetFlagsFromRunMethodSignature(codeExample);
if (flags.Length > 0)
{
Flags.Parse(args, flags);
}
object[] paramValues = BuildExampleParameterList(session, flags);
MethodInfo runMethod = GetRunMethod(codeExample);
runMethod.Invoke(codeExample, paramValues);
}
/// <summary>
/// Runs the examples from command line arguments.
/// </summary>
/// <param name="args">The command line arguments.</param>
/// <returns>The application's exit code. The valid return codes are:
/// /// <list type="bullet">
/// <item><description>0. The code example ran successfully.</description></item>
/// <item><description>1. The code example threw an exception and did not complete
/// successfully.</description></item>
/// <item><description>2. The application was invoked with an incorrect command line
/// argument.</description></item>
/// </list>
/// </returns>
private static int RunExamplesFromCommandLineArguments(string[] args)
{
ExampleRunner runner = new ExampleRunner();
runner.LoadCodeExamples(Assembly.GetExecutingAssembly());
if (args.Length == 0)
{
// Bad command line parameter.
ShowUsage(runner);
return(2);
}
string exampleName = args[0];
try
{
runner.Run(exampleName, args.Skip(1));
return(0);
}
catch (Exception e) when(e is KeyNotFoundException)
{
// First arg is not a valid example name.
Console.WriteLine("First arg is not a valid example name");
ShowUsage(runner);
return(2);
}
catch (Exception e) when(e is ArgumentException)
{
// Args passed to runner are invalid
Console.WriteLine(e.Message);
Console.WriteLine(ExampleBase.GetUsage(runner.GetCodeExampleType(exampleName)));
return(2);
}
catch (Exception e)
{
// Indicates a failure due to an unhandled exception.
Console.WriteLine(e.Message);
return(1);
}
}
/// <summary>
/// Runs the specified example name.
/// </summary>
/// <param name="exampleName">Name of the example.</param>
/// <param name="session">The session.</param>
/// <param name="args">The arguments.</param>
/// <exception cref="KeyNotFoundException">Thrown if the example with the specified name
/// is not found.</exception>
public void Run(string exampleName, GoogleAdsClient session, IEnumerable <string> args)
{
ExampleBase codeExample = null;
if (!codeExampleMap.TryGetValue(exampleName, out codeExample))
{
throw new KeyNotFoundException($"Example not found: {codeExample}");
}
Console.WriteLine(codeExample.Description);
Flag[] flags = GetFlagsFromRunMethodSignature(codeExample);
if (flags.Length > 0)
{
Flags.Parse(args, flags);
}
object[] paramValues = BuildExampleParameterList(session, flags);
MethodInfo runMethod = GetRunMethod(codeExample);
runMethod.Invoke(codeExample, paramValues);
}
/// <summary>
/// Gets the Run method for a code example.
/// </summary>
/// <param name="codeExample">The code example.</param>
/// <returns>The <see cref="MethodInfo"/> object for the <code>Run</code> method.</returns>
private static MethodInfo GetRunMethod(ExampleBase codeExample)
{
return(codeExample.GetType().GetMethod("Run"));
}
/// <summary>
/// Registers the code example.
/// </summary>
/// <param name="key">The code example name.</param>
/// <param name="value">The code example instance.</param>
private static void RegisterCodeExample(string key, ExampleBase value)
{
codeExampleMap.Add(new ExamplePair(key, value));
}
/// <summary>
/// Invokes the run method.
/// </summary>
/// <param name="codeExample">The code example.</param>
/// <param name="session">The GoogleAdsClient session for running the code example.</param>
private static void InvokeRun(ExampleBase codeExample, GoogleAdsClient session)
{
MethodInfo methodInfo = codeExample.GetType().GetMethod("Run");
methodInfo.Invoke(codeExample, GetParameters(session, codeExample));
}
