/**
* returns the current SEE polygon from the OSDB
*/
public IPolygon get_SEE()
{
SEEDAO dao = new SEEDAO(this.transactionManager.extension());
return dao.find(this.TxId);
}
/**
* Inits the current Transaction to the area specified in the SEE token. This
* method will import any additional features from the OSDB as required.
*
* My be a lengthy Operation
*
* Throws exceptions when:
* - An IO Error occurs
*/
public void Init(SEE token, int UTM)
{
ISpatialReference utmSR = this.transactionManager.getUTM(UTM);
SEEDAO dao = new SEEDAO(this.transactionManager.extension());
// throwing server faults...
dao.insert(this, token, utmSR);
// DO we need the extract call here?
// data should all be previously extracted.
extract(token.Shape,true);
}
/**
* Expands the current Transaction to include the area specified in the SEE token. This
* method will import any additional features from the OSDB as required.
*
* My be a lengthy Operation
*
* Throws exceptions when:
* - An IO Error occurs
*/
public void Expand(SEE token)
{
// now handled by a REST request. No expanding stored directly by
// the application to the database
// CREATE A NEW TRANSACTION
// COPY OLD TRANSACTIONAL DATA INTO NEW TRANSACTION
// DELETE OLD TRANSACTION
//// order is important here
IPolygon previous = get_SEE();
SEEDAO dao = new SEEDAO(this.transactionManager.extension());
dao.update(this,token);
if(previous == null)
{
// this path is only probably for some odd cases -- and during dev
extract(token.Shape,true);
return;
}
// buggy
// http://forums.esri.com/Thread.asp?c=93&f=1170&t=88297#242834
ITopologicalOperator2 op_original = (ITopologicalOperator2)previous;
op_original.IsKnownSimple_2 = false;
try
{
op_original.Simplify();
}
catch (Exception e)
{
Logger.Warn(e);
}
ITopologicalOperator2 op_new = (ITopologicalOperator2)token.Shape;
op_new.IsKnownSimple_2 = false;
try
{
op_new.Simplify();
}
catch (Exception e)
{
Logger.Warn(e);
}
if (previous.SpatialReference == null)
{
previous.SpatialReference = this.transactionManager.extension().FocusMap.SpatialReference;
}
if (token.Shape.SpatialReference == null)
{
token.Shape.SpatialReference = this.transactionManager.extension().FocusMap.SpatialReference;
}
token.Shape.Project(previous.SpatialReference);
previous.SnapToSpatialReference();
token.Shape.SnapToSpatialReference();
IPolygon t = null;
try
{
t = (IPolygon)(op_new.Difference((IPolygon)previous));
if (op_new is ITopologicalOperator2)
{
op_original = (ITopologicalOperator2)t;
try
{
op_new.Simplify();
}
catch (Exception e)
{
Logger.Warn(e);
}
}
}
catch (Exception e)
{
Logger.Write(e);
t = token.Shape; // less efficient
}
try
{
extract(t, false);
}
catch (HandledException he)
{
// rethrow -- probably connection related
throw he;
}
catch (Exception e)
{
Logger.Write(e);
// probably a bad shape resulting from subtraction above -- retry.
extract(token.Shape, false); // less efficient
}
}
