public static int ReadObject(ExecutionContext context, object[] values, out object[] inlineParameters)
{
inlineParameters = EmptyParameters;
if (values.Length < 1 || values.Length > 4)
{
context.Error.WriteLine("Invalid syntax: ReadObject NodePath [TypedStream [Index]]");
return(-1);
}
string path = values[0].ToString();
Type type = null;
uint index = 0;
// We first get type.
if (values.Length > 1)
{
type = Type.GetType(values[1].ToString());
if (type == null)
{
context.Error.WriteLine("Type '{0}' not resolved.", values[1].ToString());
return(-1);
}
}
if (values.Length > 2)
{
if (values[2] is uint)
{
index = (uint)values[2];
}
else if (values[3] is int)
{
index = (uint)((int)values[2]);
}
else if (!uint.TryParse(values[2].ToString(), out index))
{
context.Error.WriteLine("The index is not a number: {0}", values[2].ToString());
return(-1);
}
}
Node <object> node = context.ShellApp.WorkingDirectory.Find(path);
if (node == null)
{
context.Error.WriteLine("Path '{0}' does not exist", path);
return(-1);
}
TypedStream <object> typedStream = null;
try
{
if (type == null)
{
typedStream = node.OpenForReading();
}
else
{
typedStream = node.Open(type, OpenMode.Read);
}
if (typedStream == null)
{
context.Error.WriteLine("Typed stream '{0}' does not exist on path '{1}'", type, path);
return(-1);
}
// We write it.
inlineParameters = new object[] { typedStream.Read(index) };
}
finally
{
if (typedStream != null)
{
typedStream.Dispose();
}
}
return(1);
}
static List <Selectable> FindInternal <Selectable, T>(List <Selectable> result, Node <object> table,
IQueryExpression <Selectable, T> expression)
{
TypedStream <T> typedStream = table.Open <T>(OpenMode.Read);
if (typedStream == null)
{
throw new TypedStreamNotFoundException(
string.Format("Typed stream of type {0} not found in '{1}'",
typeof(T), table.Path));
}
// We first obtain index table.
IndexTable index2 = table.IndexTable;
StreamIndexTable index = index2 != null ? index2[typeof(T)] : null;
QueryFilter filter = expression.Filter;
// We make sure it is disposed correcly.
using (typedStream)
{
uint[] locations = typedStream.ObjectLocations;
for (int i = 0; i < locations.Length; i++)
{
// We have object's location.
uint primary = locations[i];
T processingObject = default(T);
// 1) We now filter all objects, first by index.
if ((filter & QueryFilter.Index) != 0)
{
Dictionary <string, object> indexData =
StreamIndexTable.IndexOfObject <T>(index, typedStream, primary, out processingObject);
// We now process through filter.
if (!expression.IsSatisfied(primary, indexData))
{
continue;
}
}
// 2) Now we try the alternative filtering, by object.
if ((filter & QueryFilter.Object) != 0)
{
// Force object loading, if not already by indexing.
if (!object.ReferenceEquals(processingObject, null))
{
processingObject = typedStream.Read(primary);
}
// We now process it.
if (!expression.IsSatisfied(processingObject))
{
continue;
}
}
// 3) We now select it.
result.Add(expression.Select(processingObject));
}
}
// 4) After all object are loaded, we sort them
if ((filter & QueryFilter.Sort) != 0)
{
expression.Sort(result);
}
return(result);
}
