private void AddValueNode(List <MetadataNode> itemNodes, ColumnIdentity value)
{
MetadataIdentity identity = new MetadataIdentity(this.schema, value.Name);
IBindingMetadata metadata = identity.GetMetadata <IBindingMetadata>() ?? this.FindDynamicMetadata(identity);
if (metadata != null && !this.IsOutsideResultScope(metadata))
{
if (metadata.HasFlag(BindingMetadataFlags.Dynamic))
{
this.AddDynamicNode(itemNodes, identity, metadata, value);
}
else
{
this.AddStaticNode(itemNodes, metadata, value);
}
}
}
public FuncColumnKey(MetadataIdentity metadata, ColumnIdentity column)
{
this.Metadata = metadata;
this.Column = column;
}
private MetadataNode AddStaticNode(List <MetadataNode> itemNodes, IBindingMetadata metadata, ColumnIdentity value)
{
MetadataNode thisNode = this.FindNode(itemNodes, metadata);
if (thisNode != null)
{
thisNode.Column ??= value;
}
else if (metadata.HasFlag(BindingMetadataFlags.Item))
{
MetadataNode itemNode = new MetadataNode(metadata)
{
Metadata = metadata,
Column = value,
Flags = metadata.HasFlag(BindingMetadataFlags.Dynamic) ? NodeFlags.Dynamic : NodeFlags.None,
};
if (metadata.Parent.HasFlag(BindingMetadataFlags.Model))
{
itemNode.Flags |= NodeFlags.Result;
}
itemNodes.Add(itemNode);
return(itemNode);
}
else
{
MetadataNode parentNode = this.FindNode(itemNodes, metadata.Parent) ?? this.AddStaticNode(itemNodes, metadata.Parent, null);
if (parentNode != null)
{
thisNode = new MetadataNode(metadata)
{
Metadata = metadata,
Column = value,
Flags = metadata.HasFlag(BindingMetadataFlags.Dynamic) ? NodeFlags.Dynamic : NodeFlags.None,
};
parentNode.Properties.Add(thisNode);
}
}
return(thisNode);
}
public void SetCellInfo(ColumnIdentity cellInfo)
{
this.columnInfo = cellInfo;
this.parameter = null;
}
private MetadataNode AddDynamicNode(List <MetadataNode> itemNodes, MetadataIdentity identity, IBindingMetadata metadata, ColumnIdentity value)
{
this.AddStaticNode(itemNodes, metadata, null);
MetadataNode thisNode = this.FindNode(itemNodes, identity);
MetadataIdentity parentIdentity = identity.Pop();
if (thisNode != null)
{
thisNode.Column ??= value;
}
else if (parentIdentity != null)
{
MetadataNode parentNode = this.FindNode(itemNodes, parentIdentity) ?? this.AddDynamicNode(itemNodes, parentIdentity, metadata, null);
if (parentNode != null)
{
thisNode = new MetadataNode(identity)
{
Column = value,
Metadata = metadata,
Flags = NodeFlags.Dynamic,
};
parentNode.Properties.Add(thisNode);
}
}
return(thisNode);
}
public void SetValue(IDbDataParameter adoParameter)
{
this.parameter = adoParameter;
this.columnInfo = null;
}
public FuncColumnKey(MetadataIdentity metadata, ColumnIdentity column)
{
this.Metadata = metadata ?? throw new ArgumentNullException(nameof(metadata));
this.Column = column;
}
private static Action <IField, object> BuildFieldBinder(MetadataIdentity metadata, ColumnIdentity column)
{
ParameterExpression fieldParam = Expression.Parameter(typeof(IField));
ParameterExpression valueParam = Expression.Parameter(typeof(object));
IBindingMetadata binding = metadata.GetMetadata <IBindingMetadata>();
Expression bindValue = valueParam;
if (metadata != null)
{
Type sourceType = null;
if (column != null)
{
BindingColumnInfo columnInfo = new BindingColumnInfo()
{
Column = column,
CanBeNull = true,
Metadata = binding,
};
sourceType = binding.Value?.Read(columnInfo)?.ReturnType;
}
BindingValueInfo valueInfo = new BindingValueInfo()
{
CanBeNull = true,
CanBeDbNull = true,
Metadata = binding,
Value = bindValue,
SourceType = sourceType,
TargetType = binding.Type,
};
bindValue = binding.Value?.Convert?.Invoke(valueInfo) ?? valueParam;
}
MethodInfo bindMethod = typeof(IField).GetMethod(nameof(IField.Bind), new[] { typeof(object) });
Expression bindCall = Expression.Call(fieldParam, bindMethod, Expression.Convert(bindValue, typeof(object)));
return(Expression.Lambda <Action <IField, object> >(bindCall, fieldParam, valueParam).Compile());
}
public static Action <IField, object> GetFieldBinder(MetadataIdentity metadata, ColumnIdentity column)
{
FuncColumnKey key = new FuncColumnKey(metadata, column);
return(columnMap.GetOrAdd(key, _ => BuildFieldBinder(metadata, column)));
}
/// <summary>
/// Initializes a new instance of the SchemaIdentity class.
/// </summary>
/// <param name="reader">The reader to construct from.</param>
public SchemaIdentity(IDataReader reader)
{
int fieldCount = (reader.IsClosed) ? 0 : reader.FieldCount;
_columns = new ColumnIdentity[fieldCount];
// if there are no fields, then this is a simple identity
if (fieldCount == 0)
{
return;
}
// we have to compare nullable, readonly and identity because it affects bulk copy
var schemaTable = reader.GetSchemaTable();
var isNullableColumn = schemaTable.Columns.IndexOf("AllowDbNull");
var isReadOnlyColumn = schemaTable.Columns.IndexOf("IsReadOnly");
var isIdentityColumn = schemaTable.Columns.IndexOf("IsIdentity");
// we know that we are going to store this in a hashtable, so pre-calculate the hashcode
unchecked
{
// base the hashcode on the column names and types
_hashCode = 17;
for (int i = 0; i < fieldCount; i++)
{
var row = schemaTable.Rows[i];
var column = new ColumnIdentity()
{
Name = reader.GetName(i),
Type = reader.GetFieldType(i),
IsNullable = (isNullableColumn == -1) ? false : row.IsNull(isNullableColumn) ? false : Convert.ToBoolean(row[isNullableColumn], CultureInfo.InvariantCulture),
IsReadOnly = (isReadOnlyColumn == -1) ? false : row.IsNull(isReadOnlyColumn) ? false : Convert.ToBoolean(row[isReadOnlyColumn], CultureInfo.InvariantCulture),
IsIdentity = (isIdentityColumn == -1) ? false : row.IsNull(isIdentityColumn) ? false : Convert.ToBoolean(row[isIdentityColumn], CultureInfo.InvariantCulture),
};
_columns[i] = column;
// update the hash code for the name and type
_hashCode *= 23;
_hashCode += column.Name.GetHashCode();
_hashCode *= 23;
_hashCode += column.Type.GetHashCode();
_hashCode *= 23;
if (column.IsNullable)
{
_hashCode++;
}
_hashCode *= 23;
if (column.IsReadOnly)
{
_hashCode++;
}
_hashCode *= 23;
if (column.IsIdentity)
{
_hashCode++;
}
}
}
}
