/// <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(string.Format(AppResources.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(string.Format(AppResources.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(string.Format(AppResources.InvalidValueName, name)); } DocumentObject doc = value as DocumentObject; if (doc == null) { throw new ArgumentException(string.Format(AppResources.InvalidValueName, name)); } value = doc.GetValue(trail, flags); } return(value); }