private static ValueSetter CreateValueSetter(IValueEntry valueEntry)
{
var entryTypeInfo = ValueEntryTypeInfo.Get(valueEntry.GetType());
var entryType = entryTypeInfo.Type;
var entryValueType = entryTypeInfo.RootGenericArguments[1];
var methodInfo = entryType.GetMethod("SetValue", false, false, entryValueType, typeof(bool), typeof(bool));
Assert.IsNotNull(methodInfo);
var drawerValueType = typeof(TValue);
Assert.IsTrue(entryValueType.IsAssignableFrom(drawerValueType));
var parameterTypes = new[]
{ typeof(IValueEntry).MakeByRefType(), drawerValueType, typeof(bool), typeof(bool) };
var dynamicMethod = new DynamicMethod(
entryType.FullName + ".SetValue", typeof(ValueAccessResult), parameterTypes, entryType);
/* Example Implementation:
* static ValueAccessResult SetValue(ref IValueEntry valueEntry,
* Component value, bool handleErrorLogs, bool catchException)
* {
* return ((FixedValueEntry<GameObject, Transform>)valueEntry)
* .SetValue((Transform)value, handleErrorLogs, catchException);
* }
*/
var gen = dynamicMethod.GetILGenerator();
gen.Emit(OpCodes.Ldarg_0); // 0:entry
gen.Emit(OpCodes.Ldind_Ref);
gen.Emit(OpCodes.Castclass, entryType); // 0:typedEntry
gen.Emit(OpCodes.Ldarg_1); // 0:typedEntry 1:drawerTypeValue
gen.EmitTypeCast(drawerValueType, entryValueType); // 0:typedEntry 1:entryValueType
gen.Emit(OpCodes.Ldarg_2); // 0:typedEntry 1:entryTypeValue 2:handleErrorLogs
gen.Emit(OpCodes.Ldarg_3); // 0:typedEntry 1:entryTypeValue 2:handleErrorLogs 3:catchException
gen.Emit(OpCodes.Callvirt, methodInfo); // 0:result
gen.Emit(OpCodes.Ret);
return((ValueSetter)dynamicMethod.CreateDelegate(typeof(ValueSetter)));
}
private static ValueGetter CreateValueGetter(IValueEntry valueEntry)
{
var entryTypeInfo = ValueEntryTypeInfo.Get(valueEntry.GetType());
var entryType = entryTypeInfo.Type;
var entryValueType = entryTypeInfo.RootGenericArguments[1];
var methodInfo = entryType.GetMethod("GetValue", false, false,
entryValueType.MakeByRefType(), typeof(bool), typeof(bool));
Assert.IsNotNull(methodInfo);
// NOTE: This is a WRONG approach since valueType may different from TValue of current instance.
//return (ValueGetter)Delegate.CreateDelegate(typeof(ValueGetter), method);
var drawerValueType = typeof(TValue);
Assert.IsTrue(entryValueType.IsAssignableFrom(drawerValueType));
var parameterTypes = new[]
{ typeof(IValueEntry).MakeByRefType(), drawerValueType.MakeByRefType(), typeof(bool), typeof(bool) };
var dynamicMethod = new DynamicMethod(
entryType.FullName + ".GetValue", typeof(ValueAccessResult), parameterTypes, entryType);
var gen = dynamicMethod.GetILGenerator();
gen.Emit(OpCodes.Ldarg_0); // 0:entry
gen.Emit(OpCodes.Ldind_Ref);
gen.Emit(OpCodes.Castclass, entryType); // 0:typedEntry
if (drawerValueType == entryValueType)
{
/* Example Implementation:
* static ValueAccessResult ViewILGet(
* ref IValueEntry valueEntry, out int value, bool handleErrorLogs, bool catchException)
* {
* return ((FixedValueEntry<GameObject, int>)valueEntry)
* .GetValue(out value, handleErrorLogs, catchException);
* }
*/
gen.Emit(OpCodes.Ldarg_1);
gen.Emit(OpCodes.Ldarg_2);
gen.Emit(OpCodes.Ldarg_3);
gen.Emit(OpCodes.Callvirt, methodInfo); // 0:result
}
else
{
/* Example Implementation:
* static ValueAccessResult ViewILGet(ref IValueEntry valueEntry,
* out Component value, bool handleErrorLogs, bool catchException)
* {
* Transform entryValue;
* var result = ((FixedValueEntry<GameObject, Transform>)valueEntry)
* .GetValue(out entryValue, handleErrorLogs, catchException);
* value = entryValue;
* return result;
* }
*/
var valueInfo = gen.DeclareLocal(entryValueType);
//var resultInfo = gen.DeclareLocal(typeof(ValueAccessResult));
gen.Emit(OpCodes.Ldloca_S, valueInfo.LocalIndex); // 0:typedEntry 1:entryValue
gen.Emit(OpCodes.Ldarg_2); // 0:typedEntry 1:entryValue 2:handleErrorLogs
gen.Emit(OpCodes.Ldarg_3); // 0:typedEntry 1:entryValue 2:handleErrorLogs 3:catchException
gen.Emit(OpCodes.Callvirt, methodInfo); // 0:result
gen.Emit(OpCodes.Ldarg_1); // 0:result 1:value
gen.Emit(OpCodes.Ldloc, valueInfo.LocalIndex); // 0:result 1:value 2:entryValue
gen.Emit(OpCodes.Stind_Ref); // value = entryValue 0:result
}
gen.Emit(OpCodes.Ret);
return((ValueGetter)dynamicMethod.CreateDelegate(typeof(ValueGetter)));
}
