public static CodeBuilder WriteDocumentEntityData(Type t, CodeBuilder cb = null)
{
var relationFields = t.GetRelationFields().ToArray();
var entityFields = t.GetEntityFields().ToArray();
// Get the entity table
cb.AppendLine($"public EntityTable {t.Name}EntityTable => Document.GetTable(\"{ObjectModelReflection.GetEntityTableName(t)}\");");
cb.AppendLine("");
// Get each non-relationl columns for each element
foreach (var f in entityFields)
{
cb.AppendLine($"public IArray<{f.FieldType.Name}> {t.Name}{f.Name} => Document.GetColumnData<{f.FieldType.Name}>({t.Name}EntityTable, \"{f.Name}\");");
}
// Gget each reational column
foreach (var f in relationFields)
{
var relType = ObjectModelReflection.RelationTypeParameter(f.FieldType);
var relName = f.Name.Substring(1);
if (!f.Name.StartsWith("_"))
{
throw new Exception("Relation names must start with a leading underscore");
}
cb.AppendLine($"public IArray<int> {t.Name}{relName} => Document.GetColumnData<int>({t.Name}EntityTable, \"{relName}\");");
}
cb.AppendLine($"public int Num{t.Name} => {t.Name}EntityTable?.NumRows ?? 0;");
// Element getter function
cb.AppendLine($"public {t.Name} Get{t.Name}(int n)");
cb.AppendLine("{");
// Get the entity retrieval function
cb.AppendLine("if (n < 0) return null;");
cb.AppendLine($"var r = new {t.Name}();");
cb.AppendLine("r.Document = Document;");
cb.AppendLine("r.Index = n;");
foreach (var f in entityFields)
{
cb.AppendLine($"r.{f.Name} = {t.Name}{f.Name}?[n] ?? default;");
}
foreach (var f in relationFields)
{
var relType = ObjectModelReflection.RelationTypeParameter(f.FieldType);
cb.AppendLine($"r.{f.Name} = new Relation<{relType}>({t.Name}{f.Name.Substring(1)}?.ElementAtOrDefault(n, -1) ?? -1, Get{relType.Name});");
}
cb.AppendLine($"r.Properties = {t.Name}PropertyLists.GetOrDefault(n) ?? r.Properties;");
cb.AppendLine("return r;");
cb.AppendLine("}");
return(cb.AppendLine());
}
public static void WriteDocumentBuilder(CodeBuilder cb)
{
cb.AppendLine("public static class DocumentBuilderExtensions");
cb.AppendLine("{");
cb.AppendLine($"public static TableBuilder ToTableBuilder(this IEnumerable<Entity> entities)");
cb.AppendLine("{");
cb.AppendLine("var first = entities.FirstOrDefault();");
cb.AppendLine("if (first == null) return null;");
foreach (var et in ObjectModelReflection.GetEntityTypes())
{
cb.AppendLine($"if (first is {et.Name}) return entities.Cast<{et.Name}>().ToTableBuilder();");
}
cb.AppendLine("throw new Exception($\"Could not generate a TableBuilder for {first.GetType()}\");");
cb.AppendLine("}");
foreach (var et in ObjectModelReflection.GetEntityTypes())
{
var entityType = et.Name;
cb.AppendLine($"public static TableBuilder ToTableBuilder(this IEnumerable<{entityType}> typedEntities)");
cb.AppendLine("{");
var tableName = ObjectModelReflection.GetEntityTableName(et);
cb.AppendLine($"var tb = new TableBuilder(\"{tableName}\");");
var entityFields = et.GetEntityFields().ToArray();
foreach (var f in entityFields)
{
var name = f.Name;
cb.AppendLine($"tb.AddColumn(\"{name}\", typedEntities.Select(x => x.{name}));");
}
var relationFields = et.GetRelationFields().ToArray();
foreach (var f in relationFields)
{
var name = f.Name.Substring(1);
var relType = ObjectModelReflection.RelationTypeParameter(f.FieldType);
var relatedTableName = ObjectModelReflection.GetEntityTableName(relType);
if (string.IsNullOrEmpty(relatedTableName))
{
throw new Exception($"Could not find related table for type {relType}");
}
cb.AppendLine($"tb.AddIndexColumn(\"{relatedTableName}\", \"{name}\", typedEntities.Select(x => x._{name}.Index));");
}
cb.AppendLine("return tb;");
cb.AppendLine("}");
}
cb.AppendLine("} // DocumentBuilderExtensions");
}
public static CodeBuilder WriteEntityClass(Type t, CodeBuilder cb = null)
{
var relationFields = t.GetRelationFields().ToArray();
cb = cb ?? new CodeBuilder();
cb.AppendLine("// AUTO-GENERATED");
cb.AppendLine($"public partial class {t.Name}").AppendLine("{");
foreach (var f in relationFields)
{
cb.AppendLine($"public {ObjectModelReflection.RelationTypeParameter(f.FieldType)} {f.Name.Substring(1)} => {f.Name}.Value;");
}
cb.AppendLine($"public List<Property> Properties = new List<Property>();");
cb.AppendLine("} // end of class");
cb.AppendLine();
return(cb);
}