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FLocal/Patcher/DB/PostgresDBTraits.cs

223 lines
7.4 KiB

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using Npgsql;
namespace Patcher.DB {
class PostgresDBTraits : IDBTraits {
public static readonly IDBTraits instance = new PostgresDBTraits();
protected PostgresDBTraits() {
}
private static readonly Regex ALPHANUMERIC = new Regex("^[a-zA-Z]\\w*$", RegexOptions.Compiled | RegexOptions.Singleline);
private static string _EscapeName(string name) {
if(!ALPHANUMERIC.IsMatch(name)) throw new ApplicationException("Name should contain only alphanumeric characters");
return string.Format("\"{0}\"", name);
}
string IDBTraits.EscapeName(string name) {
return _EscapeName(name);
}
DbConnection IDBTraits.CreateConnection(string connectionString) {
NpgsqlConnection connection = new NpgsqlConnection(connectionString);
connection.Open();
return connection;
}
string IDBTraits.MarkParam(string paramName) {
if(!ALPHANUMERIC.IsMatch(paramName)) throw new ApplicationException("Name should contain only alphanumeric characters");
return ":" + paramName;
}
string IDBTraits.ParamName(string paramName) {
if(!ALPHANUMERIC.IsMatch(paramName)) throw new ApplicationException("Name should contain only alphanumeric characters");
return paramName;
}
private static void AddParam(DbCommand command, string name, DbType type, object value) {
var param = command.CreateParameter();
param.ParameterName = name;
param.DbType = type;
param.Value = value;
command.Parameters.Add(param);
}
private static bool ParseBoolString(string value) {
switch(value.ToLower()) {
case "n":
return false;
case "y":
return true;
default:
throw new ApplicationException(string.Format("Unknown value {0}", value));
}
}
private static T CastResult<T>(object value) where T : class {
if(DBNull.Value.Equals(value)) {
return null;
} else {
return (T)value;
}
}
private static T? CastScalarResult<T>(object value) where T : struct {
if(DBNull.Value.Equals(value)) {
return null;
} else {
return (T)value;
}
}
private static readonly SQLQueryManager _SQLQueryManager = new SQLQueryManager(_EscapeName);
StoredProcedureBody IDBTraits.GetStoredProcedureBody(Func<DbCommand> commandCreator, StoredProcedureReference procedure) {
throw new NotImplementedException();
}
private static string FormatStoredProcedureHeader(StoredProcedureReference procedure) {
throw new NotImplementedException();
}
void IDBTraits.ReplaceStoredProcedureBody(Func<DbCommand> commandCreator, StoredProcedureReference procedure, StoredProcedureBody newBody) {
throw new NotImplementedException();
}
void IDBTraits.RemoveStoredProcedure(Func<DbCommand> commandCreator, StoredProcedureReference procedure) {
throw new NotImplementedException();
}
void IDBTraits.CreateView(Func<DbCommand> commandCreator, string viewName, string body) {
throw new NotImplementedException();
}
void IDBTraits.RemoveView(Func<DbCommand> commandCreator, string viewName) {
throw new NotImplementedException();
}
void IDBTraits.CreateStoredProcedure(Func<DbCommand> commandCreator, StoredProcedureReference procedure, StoredProcedureBody body) {
throw new NotImplementedException();
}
string IDBTraits.GetViewBody(Func<DbCommand> commandCreator, string name) {
throw new NotImplementedException();
}
ColumnOptions IDBTraits.GetColumnOptions(Func<DbCommand> commandCreator, ColumnReference column) {
throw new NotImplementedException();
}
void IDBTraits.RemoveColumn(Func<DbCommand> commandCreator, ColumnReference column) {
using(DbCommand command = commandCreator()) {
command.CommandText = _SQLQueryManager.RemoveColumn(column);
command.ExecuteNonQuery();
}
}
void IDBTraits.CreateColumn(Func<DbCommand> commandCreator, ColumnDescription description) {
using(DbCommand command = commandCreator()) {
command.CommandText = _SQLQueryManager.CreateColumn(description);
command.ExecuteNonQuery();
}
}
void IDBTraits.ModifyColumn(Func<DbCommand> commandCreator, ColumnDescription description) {
using(DbCommand command = commandCreator()) {
command.CommandText = _SQLQueryManager.ModifyColumnPostgresStyle(description);
Console.WriteLine();
Console.WriteLine(command.CommandText);
command.ExecuteNonQuery();
}
}
private static string GetStringRepresentation(ForeignKeyConstraint.ReferentialAction action) {
switch(action) {
case ForeignKeyConstraint.ReferentialAction.NoAction:
return "NO ACTION";
case ForeignKeyConstraint.ReferentialAction.Cascade:
return "CASCADE";
case ForeignKeyConstraint.ReferentialAction.SetNull:
return "SET NULL";
case ForeignKeyConstraint.ReferentialAction.SetDefault:
return "SET DEFAULT";
default:
throw new ApplicationException("Unknown referential action");
}
}
private void CheckConstraint(Func<DbCommand> commandCreator, ForeignKeyConstraint constraint) {
throw new NotImplementedException();
}
private void CheckConstraint(Func<DbCommand> commandCreator, UniqueConstraint constraint) {
throw new NotImplementedException();
}
private void CheckConstraint(Func<DbCommand> commandCreator, CheckConstraint constraint) {
throw new NotImplementedException();
}
private void CheckConstraint(Func<DbCommand> commandCreator, AbstractConstraint constraint) {
constraint.Accept(fkc => CheckConstraint(commandCreator, fkc), uc => CheckConstraint(commandCreator, uc), cc => CheckConstraint(commandCreator, cc));
}
public void RemoveConstraint(Func<DbCommand> commandCreator, AbstractConstraint constraint) {
CheckConstraint(commandCreator, constraint);
using(DbCommand command = commandCreator()) {
command.CommandText = _SQLQueryManager.DropConstraint(constraint);
Console.WriteLine();
Console.WriteLine(command.CommandText);
command.ExecuteNonQuery();
}
}
public void CreateConstraint(Func<DbCommand> commandCreator, AbstractConstraint constraint) {
using(DbCommand command = commandCreator()) {
command.CommandText = _SQLQueryManager.CreateConstraint(constraint);
Console.WriteLine();
Console.WriteLine(command.CommandText);
command.ExecuteNonQuery();
}
}
public void CreateTable(Func<DbCommand> commandCreator, TableDescription table) {
using(DbCommand command = commandCreator()) {
command.CommandText = _SQLQueryManager.CreateTable(table);
Console.WriteLine();
Console.WriteLine(command.CommandText);
command.ExecuteNonQuery();
}
}
private void CheckTable(Func<DbCommand> commandCreator, TableDescription table) {
throw new NotImplementedException();
}
void IDBTraits.RemoveTable(Func<DbCommand> commandCreator, TableDescription table) {
this.CheckTable(commandCreator, table);
using(DbCommand command = commandCreator()) {
command.CommandText = _SQLQueryManager.DropTable(table.table);
Console.WriteLine();
Console.WriteLine(command.CommandText);
command.ExecuteNonQuery();
}
}
bool IDBTraits.IsDDLTransactional {
get { return true; }
}
}
}