private static void CollectionItems(
object source,
object target,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
if (!Is.Enumerable(source, target))
{
return;
}
if (settings.ReferenceHandling == ReferenceHandling.Throw &&
!settings.IsImmutable(source.GetType().GetItemType()))
{
throw State.Throw.ShouldNeverGetHereException("Should have been checked for throw before copy");
}
ICopyer copyer;
if (ArrayCopyer.TryGetOrCreate(source, target, out copyer) ||
ListOfTCopyer.TryGetOrCreate(source, target, out copyer) ||
ListCopyer.TryGetOrCreate(source, target, out copyer) ||
DictionaryTKeyTValueCopyer.TryGetOrCreate(source, target, out copyer) ||
DictionaryCopyer.TryGetOrCreate(source, target, out copyer) ||
SetOfTCopyer.TryGetOrCreate(source, target, out copyer))
{
copyer.Copy(source, target, settings, referencePairs);
return;
}
if (source is IEnumerable || target is IEnumerable)
{
throw State.Throw.ShouldNeverGetHereException("Should be checked before");
}
}
private static ErrorBuilder.TypeErrorsBuilder VerifyCore(MemberSettings settings, Type type)
{
return(ErrorBuilder.Start()
.CheckRequiresReferenceHandling(type, settings, t => !settings.IsImmutable(t))
.CheckIsCopyableEnumerable(type, settings)
.CheckIndexers(type, settings));
}
// ReSharper disable once UnusedParameter.Local
private static bool MemberValueEquals(
object x,
object y,
MemberInfo propertyInfo,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
if (TryGetValueEquals(x, y, settings, out var result))
{
return(result);
}
switch (settings.ReferenceHandling)
{
case ReferenceHandling.References:
return(ReferenceEquals(x, y));
case ReferenceHandling.Structural:
Verify.CanEqualByMemberValues(x, y, settings);
return(MemberValues(x, y, settings, referencePairs));
case ReferenceHandling.Throw:
throw Throw.ShouldNeverGetHereException();
default:
throw new ArgumentOutOfRangeException(
nameof(settings.ReferenceHandling),
settings.ReferenceHandling,
null);
}
}
private static TypeErrorsBuilder VerifyEnumerableRecursively(
TypeErrorsBuilder typeErrors,
Type type,
MemberSettings settings,
MemberPath memberPath,
Func <MemberSettings, MemberPath, TypeErrors> getErrorsRecursively)
{
if (typeof(IEnumerable).IsAssignableFrom(type))
{
memberPath = memberPath == null
? new MemberPath(type)
: memberPath.WithCollectionItem(type);
var recursiveErrors = getErrorsRecursively(settings, memberPath);
if (recursiveErrors == null)
{
return(typeErrors);
}
var collectionErrors = new CollectionErrors(memberPath, recursiveErrors);
typeErrors = typeErrors.CreateIfNull(type)
.Add(collectionErrors);
}
return(typeErrors);
}
internal static void CanEqualByMemberValues <T>(
MemberSettings settings,
string className,
string methodName)
{
CanEqualByMemberValues(typeof(T), settings, className, methodName);
}
private static TypeErrorsBuilder VerifyMemberRecursively(
TypeErrorsBuilder typeErrors,
Type type,
MemberSettings settings,
MemberPath memberPath,
Func <MemberSettings, MemberPath, TypeErrors> getErrorsRecursively,
MemberInfo memberInfo)
{
memberPath = memberPath.WithMember(memberInfo);
if (memberPath.HasLoop())
{
if (settings.ReferenceHandling == ReferenceHandling.Throw)
{
typeErrors = typeErrors.CreateIfNull(type)
.Add(new ReferenceLoop(memberPath));
}
return(typeErrors);
}
var recursiveErrors = getErrorsRecursively(settings, memberPath);
if (recursiveErrors == null)
{
return(typeErrors);
}
var memberErrors = new MemberErrors(memberPath, recursiveErrors);
typeErrors = typeErrors.CreateIfNull(type)
.Add(memberErrors);
return(typeErrors);
}
private static void Copy1DItems <T>(
T[] sourceArray,
T[] targetArray,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
var copyValues = State.Copy.IsCopyValue(
sourceArray.GetType().GetItemType(),
settings);
for (var i = 0; i < sourceArray.Length; i++)
{
if (copyValues)
{
targetArray[i] = sourceArray[i];
continue;
}
var sv = sourceArray[i];
var tv = targetArray[i];
bool created;
bool needsSync;
var clone = State.Copy.CloneWithoutSync(sv, tv, settings, out created, out needsSync);
if (created)
{
targetArray[i] = clone;
}
if (needsSync)
{
State.Copy.Sync(sv, clone, settings, referencePairs);
}
}
}
public override bool Equals(
object x,
object y,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
if (TryGetEitherNullEquals(x, y, out var result))
{
return(result);
}
var xl = (IList <T>)x;
var yl = (IList <T>)y;
if (xl.Count != yl.Count)
{
return(false);
}
var isEquatable = settings.IsEquatable(typeof(T));
if (!typeof(T).IsValueType &&
settings.ReferenceHandling == ReferenceHandling.References)
{
return(isEquatable
? ItemsEquals(xl, yl, EqualityComparer <T> .Default.Equals)
: ItemsEquals(xl, yl, (xi, yi) => ReferenceEquals(xi, yi)));
}
return(isEquatable
? ItemsEquals(xl, yl, EqualityComparer <T> .Default.Equals)
: Equals(xl, yl, settings, referencePairs));
}
private static void ThrowIfHasErrors(this TypeErrors errors, MemberSettings settings, string className, string methodName)
{
if (errors == null)
{
return;
}
if (errors.Errors.Count == 1 && ReferenceEquals(errors.Errors[0], RequiresReferenceHandling.ComplexType))
{
return;
}
var errorBuilder = new StringBuilder();
errorBuilder.AppendFailed(className, methodName)
.AppendNotSupported(errors)
.AppendSolveTheProblemBy()
.AppendSuggestEquatable(errors)
.AppendLine($"* Use {settings.GetType().Name} and specify how comparing is performed:")
.AppendSuggestReferenceHandling(errors, settings)
.AppendSuggestExclude(errors);
var message = errorBuilder.ToString();
throw new NotSupportedException(message);
}
private static void Members <T>(T source, T target, MemberSettings settings, ReferencePairCollection referencePairs)
{
Debug.Assert(source != null, nameof(source));
Debug.Assert(target != null, nameof(target));
Debug.Assert(source.GetType() == target.GetType(), "Must be same type");
using (var borrowed = ListPool <IGetterAndSetter> .Borrow())
{
foreach (var member in settings.GetMembers(source.GetType()))
{
if (settings.IsIgnoringMember(member))
{
continue;
}
var getterAndSetter = settings.GetOrCreateGetterAndSetter(member);
Member(source, target, settings, referencePairs, getterAndSetter);
if (getterAndSetter.IsInitOnly)
{
borrowed.Value.Add(getterAndSetter);
}
}
foreach (var getterAndSetter in borrowed.Value)
{
var sv = getterAndSetter.GetValue(source);
var tv = getterAndSetter.GetValue(target);
if (!EqualBy.MemberValues(sv, tv, settings))
{
Throw.ReadonlyMemberDiffers(new SourceAndTargetValue(source, sv, target, tv), getterAndSetter.Member, settings);
}
}
}
}
private static void TryAddCollectionDiffs(
this DiffBuilder collectionBuilder,
object x,
object y,
MemberSettings settings)
{
if (!Is.Enumerable(x, y))
{
return;
}
if (ListDiffBy.TryGetOrCreate(x, y, out var comparer) ||
ReadonlyListDiffBy.TryGetOrCreate(x, y, out comparer) ||
ArrayDiffBy.TryGetOrCreate(x, y, out comparer) ||
DictionaryDiffBy.TryGetOrCreate(x, y, out comparer) ||
ReadOnlyDictionaryDiffBy.TryGetOrCreate(x, y, out comparer) ||
SetDiffBy.TryGetOrCreate(x, y, out comparer) ||
EnumerableDiffBy.TryGetOrCreate(x, y, out comparer))
{
comparer.AddDiffs(collectionBuilder, x, y, settings);
return;
}
throw Throw.ShouldNeverGetHereException("All enumarebles must be checked here");
}
private static void CollectionItems(
object source,
object target,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
if (!Is.Enumerable(source, target))
{
return;
}
if (settings.ReferenceHandling == ReferenceHandling.Throw &&
!settings.IsImmutable(source.GetType().GetItemType()))
{
throw State.Throw.ShouldNeverGetHereException("Should have been checked for throw before copy");
}
if (ArrayCopyer.TryGetOrCreate(source, target, out var copyer) ||
ListOfTCopyer.TryGetOrCreate(source, target, out copyer) ||
ListCopyer.TryGetOrCreate(source, target, out copyer) ||
DictionaryTKeyTValueCopyer.TryGetOrCreate(source, target, out copyer) ||
DictionaryCopyer.TryGetOrCreate(source, target, out copyer) ||
SetOfTCopyer.TryGetOrCreate(source, target, out copyer))
{
copyer.Copy(source, target, settings, referencePairs);
return;
}
if (source is IEnumerable || target is IEnumerable)
{
throw State.Throw.ShouldNeverGetHereException("Should be checked before");
}
}
/// <inheritdoc />
public override bool Equals(
object x,
object y,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
bool result;
if (TryGetEitherNullEquals(x, y, out result))
{
return(result);
}
var xd = (IReadOnlyDictionary <TKey, TValue>)x;
var yd = (IReadOnlyDictionary <TKey, TValue>)y;
if (xd.Count != yd.Count)
{
return(false);
}
if (settings.IsEquatable(typeof(TValue)))
{
return(KeysAndValuesEquals(xd, yd, EqualityComparer <TValue> .Default.Equals));
}
if (settings.ReferenceHandling == ReferenceHandling.References)
{
return(KeysAndValuesEquals(xd, yd, (xi, yi) => ReferenceEquals(xi, yi)));
}
return(KeysAndValuesEquals(xd, yd, settings, referencePairs));
}
internal static bool KeysAndValuesEquals(
IReadOnlyDictionary <TKey, TValue> x,
IReadOnlyDictionary <TKey, TValue> y,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
foreach (var key in x.Keys)
{
var xv = x[key];
TValue yv;
if (!y.TryGetValue(key, out yv))
{
return(false);
}
if (referencePairs?.Contains(xv, yv) == true)
{
continue;
}
if (!EqualBy.MemberValues(xv, yv, settings, referencePairs))
{
return(false);
}
}
return(true);
}
private static void Copy2DItems <T>(
T[,] sourceArray,
T[,] targetArray,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
var copyValues = State.Copy.IsCopyValue(
sourceArray.GetType().GetItemType(),
settings);
for (var i = sourceArray.GetLowerBound(0); i <= sourceArray.GetUpperBound(0); i++)
{
for (var j = sourceArray.GetLowerBound(1); j <= sourceArray.GetUpperBound(1); j++)
{
if (copyValues)
{
targetArray[i, j] = sourceArray[i, j];
continue;
}
var sv = sourceArray[i, j];
var tv = targetArray[i, j];
var clone = State.Copy.CloneWithoutSync(sv, tv, settings, out var created, out var needsSync);
if (created)
{
targetArray[i, j] = clone;
}
if (needsSync)
{
State.Copy.Sync(sv, clone, settings, referencePairs);
}
}
}
}
internal static TypeErrorsBuilder VerifyRecursive(
this TypeErrorsBuilder typeErrors,
Type type,
MemberSettings settings,
MemberPath memberPath,
Func <MemberSettings, MemberPath, TypeErrors> getPropertyErrors)
{
if (settings.ReferenceHandling == ReferenceHandling.References)
{
return(typeErrors);
}
typeErrors = VerifyEnumerableRecursively(typeErrors, type, settings, memberPath, getPropertyErrors);
foreach (var member in settings.GetMembers(type))
{
if (settings.IsIgnoringMember(member))
{
continue;
}
if (memberPath == null)
{
memberPath = new MemberPath(type);
}
typeErrors = VerifyMemberRecursively(typeErrors, type, settings, memberPath, getPropertyErrors, member);
}
return(typeErrors);
}
private static void CopyAnyDimension(
Array sourceArray,
Array targetArray,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
var copyValues = State.Copy.IsCopyValue(
sourceArray.GetType().GetItemType(),
settings);
foreach (var index in sourceArray.Indices())
{
if (copyValues)
{
targetArray.SetValue(sourceArray.GetValue(index), index);
continue;
}
var sv = sourceArray.GetValue(index);
var tv = targetArray.GetValue(index);
bool created;
bool needsSync;
var clone = State.Copy.CloneWithoutSync(sv, tv, settings, out created, out needsSync);
if (created)
{
targetArray.SetValue(clone, index);
}
if (needsSync)
{
State.Copy.Sync(sv, clone, settings, referencePairs);
}
}
}
internal static bool TryGetValueEquals <T>(T x, T y, MemberSettings settings, out bool result)
{
if (ReferenceEquals(x, y))
{
result = true;
return(true);
}
if (x == null || y == null)
{
result = false;
return(true);
}
if (x.GetType() != y.GetType())
{
result = false;
return(true);
}
if (settings.TryGetComparer(x.GetType(), out var comparer))
{
result = comparer.Equals(x, y);
return(true);
}
if (settings.IsEquatable(x.GetType()))
{
result = Equals(x, y);
return(true);
}
result = false;
return(false);
}
internal static object CreateInstance(object sourceValue, MemberSettings settings)
{
if (sourceValue == null)
{
return(null);
}
var type = sourceValue.GetType();
if (type.IsArray)
{
var constructor = type.GetConstructor(new[] { typeof(int) });
var parameters = new[] { type.GetProperty("Length").GetValue(sourceValue) };
//// ReSharper disable once PossibleNullReferenceException nope, never null here
var array = constructor.Invoke(parameters);
return(array);
}
if (settings.IsImmutable(type))
{
return(sourceValue);
}
try
{
return(Activator.CreateInstance(type, true));
}
catch (Exception e)
{
throw Throw.CreateCannotCreateInstanceException(sourceValue, settings, e);
}
}
internal static bool TryCreate(object x, object y, MemberSettings settings, out IRefCounted <DiffBuilder> subDiffBuilder)
{
bool created;
subDiffBuilder = TrackerCache.GetOrAdd(x, y, settings, pair => new DiffBuilder(pair, settings), out created);
return(created);
}
/// <inheritdoc />
public override bool Equals(
object x,
object y,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
bool result;
if (TryGetEitherNullEquals(x, y, out result))
{
return(result);
}
var isEquatable = settings.IsEquatable(typeof(T));
if (settings.ReferenceHandling == ReferenceHandling.References)
{
return(isEquatable
? ItemsEquals((IEnumerable <T>)x, (IEnumerable <T>)y, EqualityComparer <T> .Default.Equals)
: ItemsEquals((IEnumerable <T>)x, (IEnumerable <T>)y, (xi, yi) => ReferenceEquals(xi, yi)));
}
return(isEquatable
? ItemsEquals((IEnumerable <T>)x, (IEnumerable <T>)y, EqualityComparer <T> .Default.Equals)
: ItemsEquals((IEnumerable <T>)x, (IEnumerable <T>)y, (xi, yi) => EqualBy.MemberValues(xi, yi, settings, referencePairs)));
}
private static void Copy <T>(
ISet <T> source,
ISet <T> target,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
if (Is.IsFixedSize(source, target) && source.Count != target.Count)
{
throw State.Copy.Throw.CannotCopyFixesSizeCollections(source, target, settings);
}
if (settings.IsImmutable(typeof(T)))
{
using (var borrow = HashSetPool <T> .Borrow(EqualityComparer <T> .Default))
{
borrow.Value.UnionWith(source);
target.IntersectWith(borrow.Value);
target.UnionWith(borrow.Value);
return;
}
}
switch (settings.ReferenceHandling)
{
case ReferenceHandling.Throw:
break;
case ReferenceHandling.References:
using (var borrow = HashSetPool <T> .Borrow((x, y) => ReferenceEquals(x, y), x => RuntimeHelpers.GetHashCode(x)))
{
borrow.Value.UnionWith(source);
target.IntersectWith(borrow.Value);
target.UnionWith(borrow.Value);
}
break;
case ReferenceHandling.Structural:
IEqualityComparer <T> comparer;
if (!Set.TryGetComparer(source, out comparer))
{
comparer = EqualityComparer <T> .Default;
}
var copyIngComparer = new CopyingComparer <T>(comparer, settings, referencePairs);
using (var borrow = HashSetPool <T> .Borrow(copyIngComparer))
{
borrow.Value.UnionWith(source);
target.IntersectWith(borrow.Value);
copyIngComparer.StartCopying();
target.UnionWith(borrow.Value);
}
return;
default:
throw new ArgumentOutOfRangeException();
}
}
public void AddDiffs(
DiffBuilder collectionBuilder,
object x,
object y,
MemberSettings settings)
{
this.AddDiffs(collectionBuilder, (IReadOnlyList <T>)x, (IReadOnlyList <T>)y, settings);
}
public void AddDiffs(
DiffBuilder collectionBuilder,
object x,
object y,
MemberSettings settings)
{
this.AddDiffs(collectionBuilder, (IDictionary <TKey, TValue>)x, (IDictionary <TKey, TValue>)y, settings);
}
public void AddDiffs(
DiffBuilder collectionBuilder,
object x,
object y,
MemberSettings settings)
{
this.AddDiffs(collectionBuilder, (Array)x, (Array)y, settings);
}
public void AddDiffs(
DiffBuilder collectionBuilder,
object x,
object y,
MemberSettings settings)
{
this.AddDiffs(collectionBuilder, (IEnumerable <T>)x, (IEnumerable <T>)y, settings);
}
public void Copy(
object source,
object target,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
Copy((IDictionary)source, (IDictionary)target, settings, referencePairs);
}
public void Copy(
object source,
object target,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
Copy((Array)source, (Array)target, settings, referencePairs);
}
public void AddDiffs(
DiffBuilder collectionBuilder,
object x,
object y,
MemberSettings settings)
{
this.AddDiffs(collectionBuilder, (Array)x, (Array)y, settings);
}
// ReSharper disable once UnusedParameter.Local
internal static void IfHasErrors(TypeErrors errors, MemberSettings settings, string className, string methodName)
{
if (errors.HasErrors())
{
var message = GetErrorText(errors, settings, className, methodName);
throw new NotSupportedException(message);
}
}
public bool TryGetValueEquals(object x, object y, MemberSettings settings, out bool equal, out object xv, out object yv)
{
var result = this.TryGetValueEquals((TSource)x, (TSource)y, settings, out equal, out var xValue, out var yValue);
xv = xValue;
yv = yValue;
return(result);
}
internal static bool IsCopyValue(Type type, MemberSettings settings)
{
if (settings.IsImmutable(type) || settings.ReferenceHandling == ReferenceHandling.References)
{
return(true);
}
return(false);
}
public CopyingComparer(
IEqualityComparer <T> inner,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
this.inner = inner;
this.settings = settings;
this.referencePairs = referencePairs;
}
// ReSharper disable once UnusedParameter.Local
internal static Exception CannotCopyFixesSizeCollections(
IEnumerable source,
IEnumerable target,
MemberSettings settings)
{
var error = new CannotCopyFixedSizeCollectionsError(source, target);
var typeErrors = new TypeErrors(target.GetType(), error);
var message = typeErrors.GetErrorText(settings, typeof(Copy).Name, settings.CopyMethodName());
return new InvalidOperationException(message);
}
// ReSharper disable once UnusedParameter.Local
internal static void ReadonlyMemberDiffers(
SourceAndTargetValue sourceAndTargetValue,
MemberInfo member,
MemberSettings settings)
{
var error = new ReadonlyMemberDiffersError(sourceAndTargetValue, member);
var typeErrors = new TypeErrors(sourceAndTargetValue.Source?.GetType(), error);
var message = typeErrors.GetErrorText(settings, typeof(Copy).Name, settings.CopyMethodName());
throw new InvalidOperationException(message);
}
/// <inheritdoc />
public override bool Equals(
object x,
object y,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
bool result;
if (TryGetEitherNullEquals(x, y, out result))
{
return result;
}
return Equals((Array)x, (Array)y, settings, referencePairs);
}
// ReSharper disable once UnusedParameter.Local
private static void ThrowIfHasErrors(this TypeErrors errors, MemberSettings settings, string className, string methodName)
{
if (errors == null)
{
return;
}
if (errors.Errors.Count == 1 && ReferenceEquals(errors.Errors[0], RequiresReferenceHandling.ComplexType))
{
return;
}
var message = errors.GetErrorText(settings, className, methodName);
throw new NotSupportedException(message);
}
internal static TypeErrorsBuilder CheckRequiresReferenceHandling(
this TypeErrorsBuilder typeErrors,
Type type,
MemberSettings settings,
Func<Type, bool> requiresReferenceHandling)
{
if (settings.ReferenceHandling == ReferenceHandling.Throw)
{
if (typeof(IEnumerable).IsAssignableFrom(type))
{
if (type.Implements(typeof(IDictionary<,>)))
{
var arguments = type.GetGenericArguments();
if (arguments.Length != 2 ||
requiresReferenceHandling(arguments[0]) ||
requiresReferenceHandling(arguments[1]))
{
typeErrors = typeErrors.CreateIfNull(type)
.Add(RequiresReferenceHandling.Enumerable);
}
}
else if (requiresReferenceHandling(type.GetItemType()))
{
typeErrors = typeErrors.CreateIfNull(type)
.Add(RequiresReferenceHandling.Enumerable);
}
}
else if (type.IsKeyValuePair())
{
var arguments = type.GetGenericArguments();
if (requiresReferenceHandling(arguments[0]) || requiresReferenceHandling(arguments[1]))
{
typeErrors = typeErrors.CreateIfNull(type)
.Add(RequiresReferenceHandling.ComplexType);
}
}
else if (requiresReferenceHandling(type))
{
typeErrors = typeErrors.CreateIfNull(type)
.Add(RequiresReferenceHandling.ComplexType);
}
}
return typeErrors;
}
private void AddDiffs(
DiffBuilder collectionBuilder,
Array x,
Array y,
MemberSettings settings)
{
RankDiff rankDiff;
if (TryGetRankDiff(x, y, out rankDiff))
{
collectionBuilder.Add(rankDiff);
return;
}
foreach (var index in x.Indices())
{
collectionBuilder.UpdateCollectionItemDiff(x.GetValue(index), y.GetValue(index), new Index(index), settings);
}
}
// ReSharper disable once UnusedParameter.Local
private static string GetErrorText(this TypeErrors errors, MemberSettings settings, string className, string methodName)
{
var errorBuilder = new StringBuilder();
errorBuilder.AppendCopyFailed(className, methodName)
.AppendNotSupported(errors)
.AppendSolveTheProblemBy()
.AppendSuggestImmutable(errors)
.AppendSuggestResizableCollection(errors)
.AppendSuggestDefaultCtor(errors)
.AppendLine($"* Use {settings.GetType().Name} and specify how copying is performed:")
.AppendLine($" - {typeof(ReferenceHandling).Name}.{nameof(ReferenceHandling.Structural)} means that a the entire graph is traversed and immutable property values are copied.")
.AppendLine($" - For structural Activator.CreateInstance is used to create instances so a parameterless constructor may be needed, can be private.")
.AppendLine($" - {typeof(ReferenceHandling).Name}.{nameof(ReferenceHandling.References)} means that references are copied.")
.AppendSuggestExclude(errors);
var message = errorBuilder.ToString();
return message;
}
internal static void Copy(
IDictionary source,
IDictionary target,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
using (var toRemove = ListPool<object>.Borrow())
{
foreach (var key in target.Keys)
{
if (!source.Contains(key))
{
toRemove.Value.Add(key);
}
else
{
// Synchronize key?
}
}
foreach (var key in toRemove.Value)
{
target.Remove(key);
}
}
foreach (var key in source.Keys)
{
var sv = source[key];
var tv = target.ElementAtOrDefault(key);
bool created;
bool needsSync;
var clone = State.Copy.CloneWithoutSync(sv, tv, settings, out created, out needsSync);
if (created)
{
target[key] = clone;
}
if (needsSync)
{
State.Copy.Sync(sv, clone, settings, referencePairs);
}
}
}
private static void Copy(
IList source,
IList target,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
if ((source.IsFixedSize || target.IsFixedSize) && source.Count != target.Count)
{
throw State.Copy.Throw.CannotCopyFixesSizeCollections(source, target, settings);
}
var copyValues = State.Copy.IsCopyValue(
source.GetType().GetItemType(),
settings);
for (var i = 0; i < source.Count; i++)
{
if (copyValues)
{
target.SetElementAt(i, source[i]);
continue;
}
var sv = source[i];
var tv = target.ElementAtOrDefault(i);
bool created;
bool needsSync;
var clone = State.Copy.CloneWithoutSync(sv, tv, settings, out created, out needsSync);
if (created)
{
target.SetElementAt(i, clone);
}
if (needsSync)
{
State.Copy.Sync(sv, clone, settings, referencePairs);
}
}
target.TrimLengthTo(source);
}
private static StringBuilder AppendSuggestReferenceHandling(
this StringBuilder errorBuilder,
TypeErrors errors,
MemberSettings settings)
{
var references = $" - {typeof(ReferenceHandling).Name}.{nameof(ReferenceHandling.References)} means that reference equality is used.";
if (settings.ReferenceHandling == ReferenceHandling.Throw)
{
if (errors.AllErrors.OfType<RequiresReferenceHandling>().Any())
{
return errorBuilder.AppendLine($" - {typeof(ReferenceHandling).Name}.{nameof(ReferenceHandling.Structural)} means that a deep equals is performed.")
.AppendLine(references);
}
}
if (errors.AllErrors.OfType<ReferenceLoop>().Any())
{
return errorBuilder.AppendLine(references);
}
return errorBuilder;
}
private static bool Equals(
Array x,
Array y,
MemberSettings settings,
ReferencePairCollection referencePairs)
{
if (!Is.SameSize(x, y))
{
return false;
}
var isEquatable = settings.IsEquatable(x.GetType().GetItemType());
if (settings.ReferenceHandling == ReferenceHandling.References)
{
return isEquatable
? ItemsEquals(x, y, Equals)
: ItemsEquals(x, y, ReferenceEquals);
}
return isEquatable
? ItemsEquals(x, y, Equals)
: ItemsEquals(x, y, (xi, yi) => EqualBy.MemberValues(xi, yi, settings, referencePairs));
}
private static void ThrowIfHasErrors(this TypeErrors errors, MemberSettings settings, string className, string methodName)
{
if (errors == null)
{
return;
}
if (errors.Errors.Count == 1 && ReferenceEquals(errors.Errors[0], RequiresReferenceHandling.ComplexType))
{
return;
}
var errorBuilder = new StringBuilder();
errorBuilder.AppendFailed(className, methodName)
.AppendNotSupported(errors)
.AppendSolveTheProblemBy()
.AppendSuggestEquatable(errors)
.AppendLine($"* Use {settings.GetType().Name} and specify how comparing is performed:")
.AppendSuggestReferenceHandling(errors, settings)
.AppendSuggestExclude(errors);
var message = errorBuilder.ToString();
throw new NotSupportedException(message);
}
internal static TypeErrorsBuilder CheckIndexers(this TypeErrorsBuilder typeErrors, Type type, MemberSettings settings)
{
var propertiesSettings = settings as PropertiesSettings;
var propertyInfos = type.GetProperties(settings.BindingFlags);
foreach (var propertyInfo in propertyInfos)
{
if (propertyInfo.GetIndexParameters().Length == 0)
{
continue;
}
if (propertiesSettings?.IsIgnoringProperty(propertyInfo) == true)
{
continue;
}
if (settings.IsIgnoringDeclaringType(propertyInfo.DeclaringType))
{
continue;
}
typeErrors = typeErrors.CreateIfNull(type)
.Add(UnsupportedIndexer.GetOrCreate(propertyInfo));
}
return typeErrors;
}
private static TypeErrorsBuilder VerifyMemberRecursively(
TypeErrorsBuilder typeErrors,
Type type,
MemberSettings settings,
MemberPath memberPath,
Func<MemberSettings, MemberPath, TypeErrors> getErrorsRecursively,
MemberInfo memberInfo)
{
memberPath = memberPath.WithMember(memberInfo);
if (memberPath.HasLoop())
{
if (settings.ReferenceHandling == ReferenceHandling.Throw)
{
typeErrors = typeErrors.CreateIfNull(type)
.Add(new ReferenceLoop(memberPath));
}
return typeErrors;
}
var recursiveErrors = getErrorsRecursively(settings, memberPath);
if (recursiveErrors == null)
{
return typeErrors;
}
var memberErrors = new MemberErrors(memberPath, recursiveErrors);
typeErrors = typeErrors.CreateIfNull(type)
.Add(memberErrors);
return typeErrors;
}
private static TypeErrorsBuilder VerifyEnumerableRecursively(
TypeErrorsBuilder typeErrors,
Type type,
MemberSettings settings,
MemberPath memberPath,
Func<MemberSettings, MemberPath, TypeErrors> getErrorsRecursively)
{
if (typeof(IEnumerable).IsAssignableFrom(type))
{
memberPath = memberPath == null
? new MemberPath(type)
: memberPath.WithCollectionItem(type);
var recursiveErrors = getErrorsRecursively(settings, memberPath);
if (recursiveErrors == null)
{
return typeErrors;
}
var collectionErrors = new CollectionErrors(memberPath, recursiveErrors);
typeErrors = typeErrors.CreateIfNull(type)
.Add(collectionErrors);
}
return typeErrors;
}
internal static TypeErrorsBuilder VerifyRecursive(
this TypeErrorsBuilder typeErrors,
Type type,
MemberSettings settings,
MemberPath memberPath,
Func<MemberSettings, MemberPath, TypeErrors> getPropertyErrors)
{
if (settings.ReferenceHandling == ReferenceHandling.References)
{
return typeErrors;
}
typeErrors = VerifyEnumerableRecursively(typeErrors, type, settings, memberPath, getPropertyErrors);
foreach (var member in settings.GetMembers(type))
{
if (settings.IsIgnoringMember(member))
{
continue;
}
if (memberPath == null)
{
memberPath = new MemberPath(type);
}
typeErrors = VerifyMemberRecursively(typeErrors, type, settings, memberPath, getPropertyErrors, member);
}
return typeErrors;
}
internal static TypeErrorsBuilder CheckNotifies(this TypeErrorsBuilder typeErrors, Type type, MemberSettings settings)
{
if (settings.IsImmutable(type))
{
return typeErrors;
}
if (type.IsValueType)
{
if (typeof(INotifyCollectionChanged).IsAssignableFrom(type) ||
typeof(INotifyPropertyChanged).IsAssignableFrom(type))
{
return typeErrors.CreateIfNull(type)
.Add(StructMustNotNotifyError.GetOrCreate(type));
}
return typeErrors;
}
if (typeof(IEnumerable).IsAssignableFrom(type))
{
if (!typeof(INotifyCollectionChanged).IsAssignableFrom(type))
{
return typeErrors.CreateIfNull(type)
.Add(CollectionMustNotifyError.GetOrCreate(type));
}
}
else if (!typeof(INotifyPropertyChanged).IsAssignableFrom(type))
{
if (settings.IsIgnoringDeclaringType(type))
{
return typeErrors;
}
return typeErrors.CreateIfNull(type)
.Add(TypeMustNotifyError.GetOrCreate(type));
}
return typeErrors;
}
internal static InvalidOperationException CreateCannotCreateInstanceException(
object sourceValue,
MemberSettings settings,
Exception exception)
{
var cannotCopyError = new CannotCreateInstanceError(sourceValue);
var typeErrors = new TypeErrors(sourceValue.GetType(), new Error[] { cannotCopyError });
var message = typeErrors.GetErrorText(settings, typeof(Copy).Name, settings.CopyMethodName());
return new InvalidOperationException(message, exception);
}