public void GetArgumentValue()
{
ConstructorArgumentValues values = new ConstructorArgumentValues();
Assert.IsNull(values.GetArgumentValue(0, typeof(object)), "Mmm... managed to get a non null instance back from an empty instance.");
values.AddGenericArgumentValue(DBNull.Value, typeof(DBNull).FullName);
values.AddNamedArgumentValue("foo", DBNull.Value);
values.AddIndexedArgumentValue(16, DBNull.Value, typeof(DBNull).FullName);
Assert.IsNull(values.GetArgumentValue(100, typeof(string)), "Mmm... managed to get a non null instance back from an instance that should have now't with the specified Type.");
ConstructorArgumentValues.ValueHolder value =
values.GetArgumentValue(-3, typeof(DBNull));
Assert.IsNotNull(value, "Stored a value of a specified Type at a specified index, but got null when retrieving it using the wrong index but the correct Type.");
Assert.AreSame(DBNull.Value, value.Value, "The retrieved value was not the exact same instance as was added.");
value = values.GetArgumentValue("foo", typeof(DBNull));
Assert.IsNotNull(value, "Stored a value of a specified Type under a name, but got null when retrieving it using the wrong name but the correct Type.");
Assert.AreSame(DBNull.Value, value.Value, "The retrieved value was not the exact same instance as was added.");
}
public void GetArgumentValueIgnoresAlreadyUsedValues()
{
ISet used = new ListSet();
ConstructorArgumentValues values = new ConstructorArgumentValues();
values.AddGenericArgumentValue(1);
values.AddNamedArgumentValue("2", 2);
values.AddIndexedArgumentValue(3, 3);
Type intType = typeof(int);
ConstructorArgumentValues.ValueHolder one = values.GetArgumentValue(10, string.Empty, intType, used);
Assert.AreEqual(1, one.Value);
used.Add(one);
ConstructorArgumentValues.ValueHolder two = values.GetArgumentValue(10, "2", intType, used);
Assert.AreEqual(2, two.Value);
used.Add(two);
ConstructorArgumentValues.ValueHolder three = values.GetArgumentValue(3, string.Empty, intType, used);
Assert.AreEqual(3, three.Value);
used.Add(three);
ConstructorArgumentValues.ValueHolder four = values.GetArgumentValue(10, string.Empty, intType, used);
Assert.IsNull(four);
}
public void GetArgumentValueIgnoresAlreadyUsedValues()
{
ISet used = new ListSet();
ConstructorArgumentValues values = new ConstructorArgumentValues();
values.AddGenericArgumentValue(1);
values.AddNamedArgumentValue("2", 2);
values.AddIndexedArgumentValue(3, 3);
Type intType = typeof (int);
ConstructorArgumentValues.ValueHolder one = values.GetArgumentValue(10, string.Empty, intType, used);
Assert.AreEqual(1, one.Value);
used.Add(one);
ConstructorArgumentValues.ValueHolder two = values.GetArgumentValue(10, "2", intType, used);
Assert.AreEqual(2, two.Value);
used.Add(two);
ConstructorArgumentValues.ValueHolder three = values.GetArgumentValue(3, string.Empty, intType, used);
Assert.AreEqual(3, three.Value);
used.Add(three);
ConstructorArgumentValues.ValueHolder four = values.GetArgumentValue(10, string.Empty, intType, used);
Assert.IsNull(four);
}
/// <summary>
/// Create an array of arguments to invoke a constructor or static factory method,
/// given the resolved constructor arguments values.
/// </summary>
/// <remarks>When return value is null the out parameter UnsatisfiedDependencyExceptionData will contain
/// information for use in throwing a UnsatisfiedDependencyException by the caller. This avoids using
/// exceptions for flow control as in the original implementation.</remarks>
private ArgumentsHolder CreateArgumentArray(string objectName, RootObjectDefinition rod, ConstructorArgumentValues resolvedValues, ObjectWrapper wrapper, Type[] paramTypes, MethodBase methodOrCtorInfo, bool autowiring, out UnsatisfiedDependencyExceptionData unsatisfiedDependencyExceptionData)
{
string methodType = (methodOrCtorInfo is ConstructorInfo) ? "constructor" : "factory method";
unsatisfiedDependencyExceptionData = null;
ArgumentsHolder args = new ArgumentsHolder(paramTypes.Length);
ISet usedValueHolders = new HybridSet();
IList autowiredObjectNames = new LinkedList();
bool resolveNecessary = false;
ParameterInfo[] argTypes = methodOrCtorInfo.GetParameters();
for (int paramIndex = 0; paramIndex < paramTypes.Length; paramIndex++)
{
Type paramType = paramTypes[paramIndex];
string parameterName = argTypes[paramIndex].Name;
// If we couldn't find a direct match and are not supposed to autowire,
// let's try the next generic, untyped argument value as fallback:
// it could match after type conversion (for example, String -> int).
ConstructorArgumentValues.ValueHolder valueHolder = null;
if (resolvedValues.GetNamedArgumentValue(parameterName) != null)
{
valueHolder = resolvedValues.GetArgumentValue(parameterName, paramType, usedValueHolders);
}
else
{
valueHolder = resolvedValues.GetArgumentValue(paramIndex, paramType, usedValueHolders);
}
if (valueHolder == null && !autowiring)
{
valueHolder = resolvedValues.GetGenericArgumentValue(null, usedValueHolders);
}
if (valueHolder != null)
{
// We found a potential match - let's give it a try.
// Do not consider the same value definition multiple times!
usedValueHolders.Add(valueHolder);
args.rawArguments[paramIndex] = valueHolder.Value;
try
{
object originalValue = valueHolder.Value;
object convertedValue = TypeConversionUtils.ConvertValueIfNecessary(paramType, originalValue, null);
args.arguments[paramIndex] = convertedValue;
//?
args.preparedArguments[paramIndex] = convertedValue;
}
catch (TypeMismatchException ex)
{
//To avoid using exceptions for flow control, this is not a cost in Java as stack trace is lazily created.
string errorMessage = String.Format(CultureInfo.InvariantCulture,
"Could not convert {0} argument value [{1}] to required type [{2}] : {3}",
methodType, valueHolder.Value,
paramType, ex.Message);
unsatisfiedDependencyExceptionData = new UnsatisfiedDependencyExceptionData(paramIndex, paramType, errorMessage);
return null;
}
}
else
{
// No explicit match found: we're either supposed to autowire or
// have to fail creating an argument array for the given constructor.
if (!autowiring)
{
string errorMessage = String.Format(CultureInfo.InvariantCulture,
"Ambiguous {0} argument types - " +
"Did you specify the correct object references as {0} arguments?",
methodType);
unsatisfiedDependencyExceptionData = new UnsatisfiedDependencyExceptionData(paramIndex, paramType, errorMessage);
return null;
}
try
{
MethodParameter param = MethodParameter.ForMethodOrConstructor(methodOrCtorInfo, paramIndex);
object autowiredArgument = ResolveAutoWiredArgument(param, objectName, autowiredObjectNames);
args.rawArguments[paramIndex] = autowiredArgument;
args.arguments[paramIndex] = autowiredArgument;
args.preparedArguments[paramIndex] = new AutowiredArgumentMarker();
resolveNecessary = true;
}
catch (ObjectsException ex)
{
unsatisfiedDependencyExceptionData = new UnsatisfiedDependencyExceptionData(paramIndex, paramType, ex.Message);
return null;
}
}
}
foreach (string autowiredObjectName in autowiredObjectNames)
{
if (log.IsDebugEnabled)
{
log.Debug("Autowiring by type from object name '" + objectName +
"' via " + methodType + " to object named '" + autowiredObjectName + "'");
}
}
return args;
}
public void GetArgumentValue()
{
ConstructorArgumentValues values = new ConstructorArgumentValues();
Assert.IsNull(values.GetArgumentValue(0, typeof (object)), "Mmm... managed to get a non null instance back from an empty instance.");
values.AddGenericArgumentValue(DBNull.Value, typeof (DBNull).FullName);
values.AddNamedArgumentValue("foo", DBNull.Value);
values.AddIndexedArgumentValue(16, DBNull.Value, typeof (DBNull).FullName);
Assert.IsNull(values.GetArgumentValue(100, typeof (string)), "Mmm... managed to get a non null instance back from an instance that should have now't with the specified Type.");
ConstructorArgumentValues.ValueHolder value =
values.GetArgumentValue(-3, typeof (DBNull));
Assert.IsNotNull(value, "Stored a value of a specified Type at a specified index, but got null when retrieving it using the wrong index but the correct Type.");
Assert.AreSame(DBNull.Value, value.Value, "The retrieved value was not the exact same instance as was added.");
value = values.GetArgumentValue("foo", typeof (DBNull));
Assert.IsNotNull(value, "Stored a value of a specified Type under a name, but got null when retrieving it using the wrong name but the correct Type.");
Assert.AreSame(DBNull.Value, value.Value, "The retrieved value was not the exact same instance as was added.");
}
