| public abstract GetValue ( DocumentObject dom, GV flags ) : object | ||
| dom | DocumentObject | |
| flags | GV | |
| return | object | |
/// <summary>
/// Determines whether the member of dom specified by name is null.
/// If a member with the specified name does not exist an ArgumentException will be thrown.
/// </summary>
public virtual bool IsNull(DocumentObject dom, string name)
{
//bool isNull = false;
int dot = name.IndexOf('.');
if (dot == 0)
{
throw new ArgumentException(DomSR.InvalidValueName(name));
}
string trail = null;
if (dot > 0)
{
trail = name.Substring(dot + 1);
name = name.Substring(0, dot);
}
ValueDescriptor vd = this.vds[name];
if (vd == null)
{
throw new ArgumentException(DomSR.InvalidValueName(name));
}
if (vd is NullableDescriptor || vd is ValueTypeDescriptor)
{
if (trail != null)
{
throw new ArgumentException(DomSR.InvalidValueName(name));
}
return(vd.IsNull(dom));
}
DocumentObject docObj = (DocumentObject)vd.GetValue(dom, GV.ReadOnly);
if (docObj == null)
{
return(true);
}
if (trail != null)
{
return(docObj.IsNull(trail));
}
else
{
return(docObj.IsNull());
}
// DomValueDescriptor vd = vds[name];
// if (vd == null)
// throw new ArgumentException(DomSR.InvalidValueName(name));
//
// return vd.IsNull(dom);
}
/// <summary>
/// Gets the object specified by name from dom.
/// </summary>
public object GetValue(DocumentObject dom, string name, GV flags)
{
int dot = name.IndexOf('.');
if (dot == 0)
{
throw new ArgumentException(DomSR.InvalidValueName(name));
}
string trail = null;
if (dot > 0)
{
trail = name.Substring(dot + 1);
name = name.Substring(0, dot);
}
ValueDescriptor vd = _vds[name];
if (vd == null)
{
throw new ArgumentException(DomSR.InvalidValueName(name));
}
object value = vd.GetValue(dom, flags);
if (value == null && flags == GV.GetNull) //??? also for GV.ReadOnly?
{
return(null);
}
//REVIEW DaSt: Create object in case of GV.ReadWrite?
if (trail != null)
{
if (value == null || trail == "")
{
throw new ArgumentException(DomSR.InvalidValueName(name));
}
DocumentObject doc = value as DocumentObject;
if (doc == null)
{
throw new ArgumentException(DomSR.InvalidValueName(name));
}
value = doc.GetValue(trail, flags);
}
return(value);
}
/// <summary>
/// Gets the object specified by name from dom.
/// </summary>
public object GetValue(DocumentObject dom, string name, GV flags)
{
int dot = name.IndexOf('.');
if (dot == 0)
{
throw new ArgumentException(DomSR.InvalidValueName(name));
}
string trail = null;
if (dot > 0)
{
trail = name.Substring(dot + 1);
name = name.Substring(0, dot);
}
ValueDescriptor vd = this.vds[name];
if (vd == null)
{
throw new ArgumentException(DomSR.InvalidValueName(name));
}
object value = vd.GetValue(dom, flags);
if (value == null && flags == GV.GetNull) //??? oder auch GV.ReadOnly?
{
return(null);
}
//REVIEW DaSt: Sollte beim GV.ReadWrite das Objekt angelegt werden?
if (trail != null)
{
if (value == null || trail == "")
{
throw new ArgumentException(DomSR.InvalidValueName(name));
}
DocumentObject doc = value as DocumentObject;
if (doc == null)
{
throw new ArgumentException(DomSR.InvalidValueName(name));
}
value = doc.GetValue(trail, flags);
}
return(value);
}
/// <summary>
/// Parses the assignment to a Color l-value.
/// </summary>
private void ParseColorAssignment(DocumentObject dom, ValueDescriptor vd)
{
object val = vd.GetValue(dom, GV.ReadWrite);
Color color = ParseColor();
dom.SetValue(vd.ValueName, color);
}
/// <summary>
/// Parses the assignment to a DocumentObject l-value.
/// </summary>
private void ParseDocumentObjectAssignment(DocumentObject dom, ValueDescriptor vd)
{
// Create value if it does not exist
object val = vd.GetValue(dom, GV.ReadWrite);
//DocumentObject docObj = (DocumentObject)val;
try
{
if (Symbol == Symbol.Null)
{
//string name = vd.ValueName;
Type type = vd.ValueType;
if (typeof(Border) == type)
((Border)val).Clear();
else if (typeof(Borders) == type)
((Borders)val).ClearAll();
else if (typeof(Shading) == type)
((Shading)val).Clear();
else if (typeof(TabStops) == type)
{
TabStops tabStops = (TabStops)vd.GetValue(dom, GV.ReadWrite);
tabStops.ClearAll();
}
else
ThrowParserException(DomMsgID.NullAssignmentNotSupported, vd.ValueName);
ReadCode();
}
else
{
throw new Exception("Case: TopPosition");
//dom.SetValue(vd.ValueName, docObj);
}
}
catch (Exception ex)
{
ReportParserException(ex, DomMsgID.InvalidAssignment, vd.ValueName);
}
}
/// <summary>
/// Parses the assignment to a struct (i.e. LeftPosition) l-value.
/// </summary>
private void ParseValueTypeAssignment(DocumentObject dom, ValueDescriptor vd)
{
object val = vd.GetValue(dom, GV.ReadWrite);
try
{
INullableValue ival = (INullableValue)val;
ival.SetValue(Token);
dom.SetValue(vd.ValueName, val);
ReadCode();
}
catch (Exception ex)
{
ReportParserException(ex, DomMsgID.InvalidAssignment, vd.ValueName);
}
}