/// <summary>
/// Creates dynamic field instance for the specified <see cref="FieldInfo"/>.
/// </summary>
/// <param name="field">Field info to create dynamic field for.</param>
/// <returns>Dynamic field for the specified <see cref="FieldInfo"/>.</returns>
public static IDynamicField Create(FieldInfo field)
{
AssertUtils.ArgumentNotNull(field, "You cannot create a dynamic field for a null value.");
IDynamicField dynamicField = new SafeField(field);
return(dynamicField);
}
public void SafeFieldPerformanceTests()
{
int runs = 10000000;
object myClass = new MyClassWithPrivateFields(123, new object(), 456, new object());
FieldInfo fieldClassRefValue = IField(myClass.GetType(), "instanceRefValue");
FieldInfo fieldClassVtValue = IField(myClass.GetType(), "instanceVTValue");
StopWatch stopWatch = new StopWatch();
using (stopWatch.Start("Duration Class Set/Get field value: {0}"))
{
for (int i = 0; i < runs; i++)
{
SafeField instanceRefField = new SafeField(fieldClassRefValue);
SafeField instanceVtField = new SafeField(fieldClassVtValue);
int res = (int)instanceVtField.GetValue(myClass);
object ores = instanceRefField.GetValue(myClass);
}
}
object myStruct = new MyStructWithPrivateFields(123, new object(), 456, new object());
FieldInfo fieldStructRefValue = IField(myStruct.GetType(), "instanceRefValue");
FieldInfo fieldStructVtValue = IField(myStruct.GetType(), "instanceVTValue");
using (stopWatch.Start("Duration Struct Set/Get field value: {0}"))
{
for (int i = 0; i < runs; i++)
{
SafeField instanceRefField = new SafeField(fieldStructRefValue);
SafeField instanceVtField = new SafeField(fieldStructVtValue);
int res = (int)instanceVtField.GetValue(myStruct);
object ores = instanceRefField.GetValue(myStruct);
}
}
/* on my machine prints
*
* with System.Reflection.Emit.DynamicMethod generated code:
* Duration Class Set/Get field value: 00:00:03.2031250
* Duration Struct Set/Get field value: 00:00:03.5625000
*
* with standard reflection:
* Duration Class Set/Get field value: 00:00:45.4218750
* Duration Struct Set/Get field value: 00:00:44.5312500
*
*/
}
public void TestInstanceMembersOfClass()
{
object testref1 = new object();
object testref2 = new object();
MyClassWithPrivateFields myClass;
// ro readonly int
myClass = new MyClassWithPrivateFields(123, testref1, 456, testref2);
SafeField instanceReadonlyVtField = new SafeField(IField(myClass.GetType(), "instanceReadonlyVTValue"));
Assert.AreEqual(123, instanceReadonlyVtField.GetValue(myClass));
try { instanceReadonlyVtField.SetValue(myClass, 10); }
catch (InvalidOperationException) { }
// ro readonly object
myClass = new MyClassWithPrivateFields(123, testref1, 456, testref2);
SafeField instanceReadonlyRefField = new SafeField(IField(myClass.GetType(), "instanceReadonlyRefValue"));
Assert.AreSame(testref1, instanceReadonlyRefField.GetValue(myClass));
try { instanceReadonlyRefField.SetValue(myClass, this); }
catch (InvalidOperationException) { }
// rw int
myClass = new MyClassWithPrivateFields(123, testref1, 456, testref2);
SafeField instanceVtField = new SafeField(IField(myClass.GetType(), "instanceVTValue"));
Assert.AreEqual(456, instanceVtField.GetValue(myClass));
instanceVtField.SetValue(myClass, 9182);
Assert.AreEqual(9182, instanceVtField.GetValue(myClass));
// rw object
myClass = new MyClassWithPrivateFields(123, testref1, 456, testref2);
SafeField instanceRefField = new SafeField(IField(myClass.GetType(), "instanceRefValue"));
Assert.AreSame(testref2, instanceRefField.GetValue(myClass));
instanceRefField.SetValue(myClass, testref1);
Assert.AreSame(testref1, instanceRefField.GetValue(myClass));
}
public void TestInstanceMembersOfStruct()
{
object testref1 = new object();
object testref2 = new object();
MyStructWithPrivateFields myStruct;
// ro readonly int
myStruct = new MyStructWithPrivateFields(123, testref1, 456, testref2);
SafeField instanceReadonlyVtField = new SafeField(IField(myStruct.GetType(), "instanceReadonlyVTValue"));
Assert.AreEqual(123, instanceReadonlyVtField.GetValue(myStruct));
try { instanceReadonlyVtField.SetValue(myStruct, 10); }
catch (InvalidOperationException) { }
// ro readonly object
myStruct = new MyStructWithPrivateFields(123, testref1, 456, testref2);
SafeField instanceReadonlyRefField = new SafeField(IField(myStruct.GetType(), "instanceReadonlyRefValue"));
Assert.AreSame(testref1, instanceReadonlyRefField.GetValue(myStruct));
try { instanceReadonlyRefField.SetValue(myStruct, this); }
catch (InvalidOperationException) { }
// ro int
myStruct = new MyStructWithPrivateFields(123, testref1, 456, testref2);
SafeField instanceVtField = new SafeField(IField(myStruct.GetType(), "instanceVTValue"));
Assert.AreEqual(456, instanceVtField.GetValue(myStruct));
try { instanceVtField.SetValue(myStruct, 10); }
catch (InvalidOperationException) { }
// ro object
myStruct = new MyStructWithPrivateFields(123, testref1, 456, testref2);
SafeField instanceRefField = new SafeField(IField(myStruct.GetType(), "instanceRefValue"));
Assert.AreSame(testref2, instanceRefField.GetValue(myStruct));
try { instanceRefField.SetValue(myStruct, 10); }
catch (InvalidOperationException) { }
}
private void TestStaticMembersOf(Type type, object expectedRoRefValue)
{
// ro const int
SafeField constField = new SafeField(SField(type, "constantValue"));
Assert.AreEqual(5, constField.GetValue(null));
try { constField.SetValue(null, 3); }
catch (InvalidOperationException) { }
// ro static readonly int
SafeField roVtField = new SafeField(SField(type, "staticReadonlyVTValue"));
Assert.AreEqual(11, roVtField.GetValue(null));
try { roVtField.SetValue(null, 10); }
catch (InvalidOperationException) { }
// ro static readonly object
SafeField roRefField = new SafeField(SField(type, "staticReadonlyRefValue"));
Assert.AreSame(expectedRoRefValue, roRefField.GetValue(null));
try { roRefField.SetValue(null, new object()); }
catch (InvalidOperationException) { }
// rw static int
SafeField vtField = new SafeField(SField(type, "staticVTValue"));
vtField.SetValue(null, 10);
Assert.AreEqual(10, vtField.GetValue(null));
// rw static object
SafeField refField = new SafeField(SField(type, "staticRefValue"));
object o = new object();
refField.SetValue(null, o);
Assert.AreSame(o, refField.GetValue(null));
}
