private void AutoModifyField(TypeDefinition targetType, MemberActionAttribute fieldActionAttr,
FieldDefinition yourField)
{
Log_modifying_member("field", yourField);
(fieldActionAttr != null).AssertTrue();
var asModifies = fieldActionAttr as ModifiesMemberAttribute;
string targetFieldName = null;
ModificationScope scope;
if (asModifies != null) {
targetFieldName = asModifies.MemberName ?? yourField.Name;
scope = asModifies.Scope;
} else if (fieldActionAttr is NewMemberAttribute) {
targetFieldName = yourField.Name;
scope = ModificationScope.All;
} else {
throw Errors.Unknown_action_attribute(fieldActionAttr);
}
var targetField = targetType.GetField(targetFieldName);
if (targetField == null) {
throw Errors.Missing_member("field", yourField, targetFieldName);
}
if ((scope & ModificationScope.Accessibility) != 0) {
targetField.SetAccessibility(yourField.GetAccessbility());
}
if ((scope & ModificationScope.CustomAttributes) != 0) {
CopyCustomAttributes(targetField, yourField);
}
if ((scope & ModificationScope.Body) != 0) {
targetField.InitialValue = yourField.InitialValue; //dunno what this is used for
targetField.Constant = yourField.Constant;
}
}
private void AutoModifyProperty(TypeDefinition targetType, MemberActionAttribute propActionAttr,
PropertyDefinition yourProp)
{
Log_modifying_member("property", yourProp);
var modifiesMemberAttr = propActionAttr as ModifiesMemberAttribute;
var newMemberAttr = propActionAttr as NewMemberAttribute;
string targetPropName;
ModificationScope scope;
if (modifiesMemberAttr != null)
{
targetPropName = modifiesMemberAttr.MemberName ?? yourProp.Name;
scope = modifiesMemberAttr.Scope;
}
else if (newMemberAttr != null)
{
targetPropName = yourProp.Name;
scope = ModificationScope.All;
}
else
{
throw Errors.Unknown_action_attribute(propActionAttr);
}
var targetProp = targetType.GetProperty(targetPropName,
yourProp.Parameters.Select(x => x.ParameterType));
if (targetProp == null)
{
throw Errors.Missing_member("property", yourProp, targetPropName);
}
if ((scope & ModificationScope.CustomAttributes) != 0)
{
CopyCustomAttributes(targetProp, yourProp);
for (int i = 0; i < yourProp.Parameters.Count; i++)
{
CopyCustomAttributes(targetProp.Parameters[i], yourProp.Parameters[i]);
}
}
if ((scope & ModificationScope.Body) != 0)
{
targetProp.GetMethod = yourProp.GetMethod != null?FixMethodReference(yourProp.GetMethod).Resolve() : null;
targetProp.SetMethod = yourProp.SetMethod != null?FixMethodReference(yourProp.SetMethod).Resolve() : null;
targetProp.OtherMethods.Clear();
if (yourProp.HasOtherMethods)
{
//I have absolutely NO idea what this is used for
foreach (var otherMethod in yourProp.OtherMethods)
{
targetProp.OtherMethods.Add(FixMethodReference(otherMethod).Resolve());
}
}
}
}
private void AutoModifyMethod(TypeDefinition targetType, MethodDefinition yourMethod,
MemberActionAttribute memberAction)
{
Log_modifying_member("method", yourMethod);
var bodySource = yourMethod;
var insertAttribute = yourMethod.GetCustomAttribute<DuplicatesBodyAttribute>();
if (insertAttribute != null) {
//Note that the source type is resolved using yourMethod's module, which uses a different IMetadataResolver,
//and thus will resolve the method from the target, unmodified assembly.
var importSourceType = insertAttribute.SourceType != null
? yourMethod.Module.Import((TypeReference) insertAttribute.SourceType)
: yourMethod.Module.Import(targetType);
var importMethod = importSourceType.Resolve().GetMethods(insertAttribute.MethodName,
yourMethod.Parameters.Select(x => x.ParameterType)).SingleOrDefault();
var others =
importSourceType.Resolve().Methods.Where(x => x.Name == insertAttribute.MethodName).ToArray();
if (importMethod == null) {
throw Errors.Missing_member("method", yourMethod, insertAttribute.MethodName);
}
bodySource = importMethod;
}
var modifiesMemberAttr = memberAction as ModifiesMemberAttribute;
var newMemberAttr = memberAction as NewMemberAttribute;
ModificationScope scope;
string targetMethodName;
if (modifiesMemberAttr != null) {
targetMethodName = modifiesMemberAttr.MemberName ?? yourMethod.Name;
scope = modifiesMemberAttr.Scope;
} else if (newMemberAttr != null) {
targetMethodName = yourMethod.Name;
scope = ModificationScope.All;
} else {
throw Errors.Unknown_action_attribute(memberAction);
}
var targetMethod =
targetType.GetMethods(targetMethodName, yourMethod.Parameters.Select(x => x.ParameterType)).FirstOrDefault();
if (targetMethod == null) {
throw Errors.Missing_member("method", yourMethod, targetMethodName);
}
if (modifiesMemberAttr != null && targetMethod.IsAbstract && (scope & ModificationScope.Body) != 0) {
throw Errors.Invalid_member("method", yourMethod, targetMethod.FullName,
"You cannot modify the body of an abstract method.");
}
ModifyMethod(targetMethod, yourMethod, scope & ~ModificationScope.Body, newMemberAttr != null);
ModifyMethod(targetMethod, bodySource, ModificationScope.Body & scope, false);
}
private void AutoModifyField(TypeDefinition targetType, MemberActionAttribute fieldActionAttr,
FieldDefinition yourField)
{
Log_modifying_member("field", yourField);
(fieldActionAttr != null).AssertTrue();
var asModifies = fieldActionAttr as ModifiesMemberAttribute;
string targetFieldName = null;
ModificationScope scope;
if (asModifies != null)
{
targetFieldName = asModifies.MemberName ?? yourField.Name;
scope = asModifies.Scope;
}
else if (fieldActionAttr is NewMemberAttribute)
{
targetFieldName = yourField.Name;
scope = ModificationScope.All;
}
else
{
throw Errors.Unknown_action_attribute(fieldActionAttr);
}
var targetField = targetType.GetField(targetFieldName);
if (targetField == null)
{
throw Errors.Missing_member("field", yourField, targetFieldName);
}
if ((scope & ModificationScope.Accessibility) != 0)
{
targetField.SetAccessibility(yourField.GetAccessbility());
}
if ((scope & ModificationScope.CustomAttributes) != 0)
{
CopyCustomAttributes(targetField, yourField);
}
if ((scope & ModificationScope.Body) != 0)
{
targetField.InitialValue = yourField.InitialValue; //dunno what this is used for
targetField.Constant = yourField.Constant;
}
}
private void AutoModifyMethod(TypeDefinition targetType, MethodDefinition yourMethod,
MemberActionAttribute memberAction)
{
Log_modifying_member("method", yourMethod);
var bodySource = yourMethod;
var insertAttribute = yourMethod.GetCustomAttribute <DuplicatesBodyAttribute>();
if (insertAttribute != null)
{
//Note that the source type is resolved using yourMethod's module, which uses a different IMetadataResolver,
//and thus will resolve the method from the target, unmodified assembly.
var importSourceType = insertAttribute.SourceType != null
? yourMethod.Module.Import((TypeReference)insertAttribute.SourceType)
: yourMethod.Module.Import(targetType);
var importMethod = importSourceType.Resolve().GetMethods(insertAttribute.MethodName,
yourMethod.Parameters.Select(x => x.ParameterType)).SingleOrDefault();
var others =
importSourceType.Resolve().Methods.Where(x => x.Name == insertAttribute.MethodName).ToArray();
if (importMethod == null)
{
throw Errors.Missing_member("method", yourMethod, insertAttribute.MethodName);
}
bodySource = importMethod;
}
var modifiesMemberAttr = memberAction as ModifiesMemberAttribute;
var newMemberAttr = memberAction as NewMemberAttribute;
ModificationScope scope;
string targetMethodName;
if (modifiesMemberAttr != null)
{
targetMethodName = modifiesMemberAttr.MemberName ?? yourMethod.Name;
scope = modifiesMemberAttr.Scope;
}
else if (newMemberAttr != null)
{
targetMethodName = yourMethod.Name;
scope = ModificationScope.All;
}
else
{
throw Errors.Unknown_action_attribute(memberAction);
}
var targetMethod =
targetType.GetMethods(targetMethodName, yourMethod.Parameters.Select(x => x.ParameterType)).FirstOrDefault();
if (targetMethod == null)
{
throw Errors.Missing_member("method", yourMethod, targetMethodName);
}
if (modifiesMemberAttr != null && targetMethod.IsAbstract && (scope & ModificationScope.Body) != 0)
{
throw Errors.Invalid_member("method", yourMethod, targetMethod.FullName,
"You cannot modify the body of an abstract method.");
}
ModifyMethod(targetMethod, yourMethod, scope & ~ModificationScope.Body, newMemberAttr != null);
ModifyMethod(targetMethod, bodySource, ModificationScope.Body & scope, false);
}
private void AutoModifyProperty(TypeDefinition targetType, MemberActionAttribute propActionAttr,
PropertyDefinition yourProp)
{
Log_modifying_member("property", yourProp);
var modifiesMemberAttr = propActionAttr as ModifiesMemberAttribute;
var newMemberAttr = propActionAttr as NewMemberAttribute;
string targetPropName;
ModificationScope scope;
if (modifiesMemberAttr != null) {
targetPropName = modifiesMemberAttr.MemberName ?? yourProp.Name;
scope = modifiesMemberAttr.Scope;
} else if (newMemberAttr != null) {
targetPropName = yourProp.Name;
scope = ModificationScope.All;
} else {
throw Errors.Unknown_action_attribute(propActionAttr);
}
var targetProp = targetType.GetProperty(targetPropName,
yourProp.Parameters.Select(x => x.ParameterType));
if (targetProp == null) {
throw Errors.Missing_member("property", yourProp, targetPropName);
}
if ((scope & ModificationScope.CustomAttributes) != 0) {
CopyCustomAttributes(targetProp, yourProp);
for (int i = 0; i < yourProp.Parameters.Count; i++) {
CopyCustomAttributes(targetProp.Parameters[i], yourProp.Parameters[i]);
}
}
if ((scope & ModificationScope.Body) != 0) {
targetProp.GetMethod = yourProp.GetMethod != null ? FixMethodReference(yourProp.GetMethod).Resolve() : null;
targetProp.SetMethod = yourProp.SetMethod != null ? FixMethodReference(yourProp.SetMethod).Resolve() : null;
targetProp.OtherMethods.Clear();
if (yourProp.HasOtherMethods) {
//I have absolutely NO idea what this is used for
foreach (var otherMethod in yourProp.OtherMethods) {
targetProp.OtherMethods.Add(FixMethodReference(otherMethod).Resolve());
}
}
}
}
