/// <summary>
/// Processes a COPY command
/// </summary>
/// <param name="cmd">Copy Command</param>
public void ProcessCopyCommand(CopyCommand cmd)
{
if (this._manager is IUpdateableGenericIOManager)
{
((IUpdateableGenericIOManager)this._manager).Update(cmd.ToString());
}
else
{
try
{
//If Source and Destination are equal this is a no-op
if (EqualityHelper.AreUrisEqual(cmd.SourceUri, cmd.DestinationUri)) return;
//Firstly check that appropriate IO Behaviour is provided
if (cmd.SourceUri == null || cmd.DestinationUri == null)
{
if ((this._manager.IOBehaviour & IOBehaviour.HasDefaultGraph) == 0) throw new SparqlUpdateException("The underlying store does not provide support for an explicit unnamed Default Graph required to process this command");
}
IOBehaviour desired = cmd.DestinationUri == null ? IOBehaviour.OverwriteDefault : IOBehaviour.OverwriteNamed;
if ((this._manager.IOBehaviour & desired) == 0) throw new SparqlUpdateException("The underlying store does not provide the required IO Behaviour to implement this command");
Graph source = new Graph();
this._manager.LoadGraph(source, cmd.SourceUri);
source.BaseUri = cmd.SourceUri;
//If the Manager supports delete ensure the Destination Graph is deleted
if (this._manager.DeleteSupported)
{
try
{
this._manager.DeleteGraph(cmd.DestinationUri);
}
catch (Exception ex)
{
throw new SparqlUpdateException("Unable to process a COPY command as unable to ensure that the Destination Graph was deleted prior to moving the data from the Source Graph", ex);
}
}
//Load Destination Graph and ensure it is empty
Graph dest = new Graph();
this._manager.LoadGraph(dest, cmd.DestinationUri);
dest.BaseUri = cmd.DestinationUri;
dest.Clear();
//Transfer the data and update both the Graphs
dest.Merge(source);
this._manager.SaveGraph(dest);
}
catch
{
if (!cmd.Silent) throw;
}
}
}
/// <summary>
/// Processes a COPY command
/// </summary>
/// <param name="cmd">Copy Command</param>
public void ProcessCopyCommand(CopyCommand cmd)
{
if (this._manager is IUpdateableGenericIOManager)
{
((IUpdateableGenericIOManager)this._manager).Update(cmd.ToString());
}
else
{
try
{
Graph source = new Graph();
this._manager.LoadGraph(source, cmd.SourceUri);
source.BaseUri = cmd.SourceUri;
//If the Manager supports delete ensure the Destination Graph is deleted
if (this._manager.DeleteSupported)
{
try
{
this._manager.DeleteGraph(cmd.DestinationUri);
}
catch (Exception ex)
{
throw new SparqlUpdateException("Unable to process a MOVE command as unable to ensure that the Destination Graph was deleted prior to moving the data from the Source Graph", ex);
}
}
//Load Destination Graph and ensure it is empty
Graph dest = new Graph();
this._manager.LoadGraph(dest, cmd.DestinationUri);
dest.BaseUri = cmd.DestinationUri;
dest.Clear();
//Transfer the data and update both the Graphs
dest.Merge(source);
this._manager.SaveGraph(dest);
}
catch
{
if (!cmd.Silent) throw;
}
}
}