/// <summary>
/// Indicates whether field with specified <paramref name="fieldIndex"/> is changed.
/// </summary>
/// <param name="fieldIndex">Index of the field to check.</param>
/// <returns><see langword="True"/> if specified field is changed;
/// otherwise, <see langword="false"/>.</returns>
public bool IsChanged(int fieldIndex)
{
if (difference == null)
{
return(false);
}
return(difference.GetFieldState(fieldIndex).IsAvailable());
}
protected bool IsFieldAvailable(FieldInfo field)
{
if (field.ReflectedType.IsInterface)
{
field = TypeInfo.FieldMap[field];
}
return(Tuple.GetFieldState(field.MappingInfo.Offset).IsAvailable());
}
public void MainTest()
{
using (var session = Domain.OpenSession()) {
using (var t = session.OpenTransaction()) {
Book b = session.Query.SingleOrDefault <Book>(key);
Tuple tuple = b.Tuple;
Assert.IsTrue(tuple.GetFieldState(2).IsAvailable());
Assert.IsFalse(tuple.GetFieldState(3).IsAvailable());
Assert.AreEqual(TITLE, b.Title);
Assert.IsFalse(tuple.GetFieldState(3).IsAvailable());
// Fetching lazy load field
Assert.AreEqual(TEXT, b.Text);
t.Complete();
}
}
}
public static bool IsAtLeastOneColumAvailable(this Tuple target, Segment <int> segment)
{
for (int i = segment.Offset; i < segment.EndOffset; i++)
{
var state = target.GetFieldState(i);
if (state.IsAvailable())
{
return(true);
}
}
return(false);
}
public static bool ContainsNonEmptyValues(this Tuple target, Segment <int> segment)
{
for (int i = segment.Offset; i < segment.EndOffset; i++)
{
var state = target.GetFieldState(i);
if (state.HasValue())
{
return(true);
}
}
return(false);
}
public static bool ContainsNonEmptyValues(this Tuple target)
{
for (int i = 0; i < target.Count; i++)
{
var state = target.GetFieldState(i);
if (state.HasValue())
{
return(true);
}
}
return(false);
}
private static void MergeTuplesPreferOriginSlow(Tuple origin, Tuple difference, int startIndex, int length)
{
var bound = startIndex + length;
for (int index = startIndex; index < bound; index++)
{
TupleFieldState fieldState;
if (!origin.GetFieldState(index).IsAvailable())
{
CopyValue(difference, index, origin, index);
}
}
}
public static bool IsValidKeyTuple(Tuple tuple)
{
var limit = tuple.Descriptor.Count;
for (int i = 0; i < limit; i++)
{
if (tuple.GetFieldState(i).IsNull())
{
return(false);
}
}
return(true);
}
/// <summary>
/// Gets the field state map of the specified <see cref="Tuple"/>.
/// </summary>
/// <param name="target">The <see cref="Tuple"/> to inspect.</param>
/// <param name="requestedState">The state to compare with.</param>
/// <returns>Newly created <see cref="BitArray"/> instance which holds inspection result.</returns>
public static BitArray GetFieldStateMap(this Tuple target, TupleFieldState requestedState)
{
var count = target.Descriptor.Count;
var result = new BitArray(count);
switch (requestedState)
{
case TupleFieldState.Default:
for (int i = 0; i < count; i++)
{
result[i] = target.GetFieldState(i) == 0;
}
break;
default:
for (int i = 0; i < count; i++)
{
result[i] = (requestedState & target.GetFieldState(i)) != 0;
}
break;
}
return(result);
}
public static bool IsValidKeyTuple(Tuple tuple, int[] keyIndexes)
{
if (keyIndexes == null)
{
return(IsValidKeyTuple(tuple));
}
var limit = keyIndexes.Length;
for (int i = 0; i < limit; i++)
{
if (tuple.GetFieldState(keyIndexes[i]).IsNull())
{
return(false);
}
}
return(true);
}
public static bool IsNull(Tuple tuple, int[] columns)
{
return(columns.Aggregate(true, (current, column) => current & tuple.GetFieldState(column).IsNull()));
}
private static void TestTuple(Xtensive.Tuples.Tuple tuple)
{
Assert.IsFalse(tuple.GetFieldState(0).IsAvailable());
try {
tuple.GetFieldState(0).IsNull();
throw new AssertionException("Value is not available. No one knows if it is null or not.");
} catch (InvalidOperationException) {
}
tuple.SetValue(0, 1);
Assert.IsTrue(tuple.GetFieldState(0).IsAvailable());
Assert.IsFalse(tuple.GetFieldState(0).IsNull());
Assert.IsTrue(tuple.GetFieldState(0).HasValue());
Assert.AreEqual(1, tuple.GetValue(0));
Assert.AreEqual(1, tuple.GetValue <int>(0));
Assert.AreEqual(new int?(1), tuple.GetValue <int?>(0));
tuple.SetValue(0, null);
Assert.IsTrue(tuple.GetFieldState(0).IsAvailable());
Assert.IsTrue(tuple.GetFieldState(0).IsNull());
Assert.IsFalse(tuple.GetFieldState(0).HasValue());
Assert.AreEqual(null, tuple.GetValue(0));
Assert.AreEqual(null, tuple.GetValue <int?>(0));
tuple.SetValue <int?>(0, null);
Assert.IsTrue(tuple.GetFieldState(0).IsAvailable());
Assert.IsTrue(tuple.GetFieldState(0).IsNull());
Assert.IsFalse(tuple.GetFieldState(0).HasValue());
Assert.AreEqual(null, tuple.GetValue(0));
Assert.AreEqual(null, tuple.GetValue <int?>(0));
Assert.AreEqual(null, tuple.GetValueOrDefault(0));
Assert.AreEqual(null, tuple.GetValueOrDefault <int?>(0));
try {
tuple.GetValue(1);
throw new AssertionException("Value should not be available.");
} catch (InvalidOperationException) {
}
try {
tuple.GetValue <string>(2);
throw new AssertionException("Value should not be available.");
} catch (InvalidOperationException) {
}
try {
tuple.GetValue <byte>(0);
throw new AssertionException("Null reference or Invalid cast exception should be thrown.");
}
catch (NullReferenceException) {}
catch (InvalidCastException) {}
Assert.IsTrue(tuple.Equals(tuple));
}
public override bool CanMaterialize(Tuple tuple) => aggregateType == AggregateType.Sum || (tuple.GetFieldState(0) & TupleFieldState.Null) == 0;
public static bool IsNull(Tuple tuple, int[] columns) => columns.All(column => tuple.GetFieldState(column).IsNull());
public void Main()
{
Tuple t = Tuple.Create <int, string>(0, null);
Assert.IsTrue(t.GetFieldState(0).IsAvailable());
Assert.IsFalse(t.GetFieldState(0).IsNull());
Assert.IsTrue(t.GetFieldState(1).IsAvailable());
Assert.IsTrue(t.GetFieldState(1).IsNull());
t.SetValue(0, null);
t.SetValue(1, null);
Assert.IsTrue(t.GetFieldState(0).IsAvailable());
Assert.IsTrue(t.GetFieldState(1).IsAvailable());
Assert.IsTrue(t.GetFieldState(0).IsNull());
Assert.IsTrue(t.GetFieldState(1).IsNull());
t.SetValue(0, new int?(32));
Assert.IsTrue(t.GetFieldState(0).IsAvailable());
Assert.IsFalse(t.GetFieldState(0).IsNull());
t.SetValue(0, (int?)null);
Assert.IsTrue(t.GetFieldState(0).IsAvailable());
Assert.IsTrue(t.GetFieldState(0).IsNull());
}
/// <inheritdoc/>
public override TupleFieldState GetFieldState(int fieldIndex)
{
return(InnerTuple.GetFieldState(fieldIndex));
}
public static Key Materialize(Domain domain, string nodeId,
TypeInfo type, Tuple value, TypeReferenceAccuracy accuracy, bool canCache, int[] keyIndexes)
{
var hierarchy = type.Hierarchy;
var keyInfo = type.Key;
if (keyIndexes == null)
{
if (value.Descriptor != keyInfo.TupleDescriptor)
{
throw new ArgumentException(Strings.ExWrongKeyStructure);
}
if (accuracy == TypeReferenceAccuracy.ExactType)
{
int typeIdColumnIndex = keyInfo.TypeIdColumnIndex;
if (typeIdColumnIndex >= 0 && !value.GetFieldState(typeIdColumnIndex).IsAvailable())
{
// Ensures TypeId is filled in into Keys of newly created Entities
value.SetValue(typeIdColumnIndex, type.TypeId);
}
}
}
if (hierarchy != null && hierarchy.Root.IsLeaf)
{
accuracy = TypeReferenceAccuracy.ExactType;
canCache = false; // No reason to cache
}
Key key;
var isGenericKey = keyInfo.TupleDescriptor.Count <= WellKnown.MaxGenericKeyLength;
if (isGenericKey)
{
key = CreateGenericKey(domain, nodeId, type, accuracy, value, keyIndexes);
}
else
{
if (keyIndexes != null)
{
throw Exceptions.InternalError(Strings.ExKeyIndexesAreSpecifiedForNonGenericKey, OrmLog.Instance);
}
key = new LongKey(nodeId, type, accuracy, value);
}
if (!canCache)
{
return(key);
}
var keyCache = domain.KeyCache;
lock (keyCache) {
Key foundKey;
if (keyCache.TryGetItem(key, true, out foundKey))
{
key = foundKey;
}
else
{
if (accuracy == TypeReferenceAccuracy.ExactType)
{
keyCache.Add(key);
}
}
}
return(key);
}