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using System.Collections.Generic;
using System.Linq;
using System.Xml;
namespace TablesAndTuples
{
class WixTableDefinition
{
public WixTableDefinition(string name, IEnumerable<WixColumnDefinition> columns, bool unreal, string tupleDefinitionName, bool? tupleIdIsPrimaryKey)
{
this.Name = name;
this.Unreal = unreal;
this.Columns = columns?.ToArray();
this.TupleDefinitionName = tupleDefinitionName ?? name;
this.TupleIdIsPrimaryKey = tupleIdIsPrimaryKey ?? DeriveTupleIdIsPrimaryKey(this.Columns);
}
public string Name { get; }
public string TupleDefinitionName { get; }
public bool Unreal { get; }
public WixColumnDefinition[] Columns { get; }
public bool TupleIdIsPrimaryKey { get; }
static WixTableDefinition Read(XmlReader reader)
{
var empty = reader.IsEmptyElement;
string name = null;
string tupleDefinitionName = null;
var unreal = false;
bool? tupleIdIsPrimaryKey = null;
while (reader.MoveToNextAttribute())
{
switch (reader.LocalName)
{
case "name":
name = reader.Value;
break;
case "tupleDefinitionName":
tupleDefinitionName = reader.Value;
break;
case "tupleIdIsPrimaryKey":
tupleIdIsPrimaryKey = reader.Value.Equals("yes");
break;
case "unreal":
unreal = reader.Value.Equals("yes");
break;
}
}
if (null == name)
{
throw new XmlException();
}
var columns = new List<WixColumnDefinition>();
// parse the child elements
if (!empty)
{
var done = false;
while (!done && reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.Element:
switch (reader.LocalName)
{
case "columnDefinition":
var columnDefinition = WixColumnDefinition.Read(reader);
columns.Add(columnDefinition);
break;
default:
throw new XmlException();
}
break;
case XmlNodeType.EndElement:
done = true;
break;
}
}
if (!done)
{
throw new XmlException();
}
}
return new WixTableDefinition(name, columns.ToArray(), unreal, tupleDefinitionName, tupleIdIsPrimaryKey);
}
static bool DeriveTupleIdIsPrimaryKey(WixColumnDefinition[] columns)
{
return columns[0].PrimaryKey &&
columns[0].Type == ColumnType.String &&
columns[0].Category == ColumnCategory.Identifier &&
!columns[0].Name.EndsWith("_") &&
(columns.Length == 1 || !columns.Skip(1).Any(t => t.PrimaryKey));
}
public static List<WixTableDefinition> LoadCollection(string inputPath)
{
using (var reader = XmlReader.Create(inputPath))
{
reader.MoveToContent();
if ("tableDefinitions" != reader.LocalName)
{
throw new XmlException();
}
var empty = reader.IsEmptyElement;
var tableDefinitions = new List<WixTableDefinition>();
while (reader.MoveToNextAttribute())
{
}
// parse the child elements
if (!empty)
{
var done = false;
while (!done && reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.Element:
switch (reader.LocalName)
{
case "tableDefinition":
tableDefinitions.Add(WixTableDefinition.Read(reader));
break;
default:
throw new XmlException();
}
break;
case XmlNodeType.EndElement:
done = true;
break;
}
}
if (!done)
{
throw new XmlException();
}
}
return tableDefinitions;
}
}
}
}
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