1 files changed, 537 insertions, 0 deletions

diff --git a/OpenSim/Data/PGSQL/PGSQLGenericTableHandler.cs b/OpenSim/Data/PGSQL/PGSQLGenericTableHandler.cs
new file mode 100644
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--- /dev/null
+++ b/OpenSim/Data/PGSQL/PGSQLGenericTableHandler.cs
@@ -0,0 +1,537 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Reflection;
+using log4net;
+using OpenMetaverse;
+using OpenSim.Framework;
+using OpenSim.Region.Framework.Interfaces;
+using System.Text;
+using Npgsql;
+
+namespace OpenSim.Data.PGSQL
+{
+    public class PGSQLGenericTableHandler<T> : PGSqlFramework where T : class, new()
+    {
+        private static readonly ILog m_log =
+            LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        protected string m_ConnectionString;
+        protected PGSQLManager m_database; //used for parameter type translation
+        protected Dictionary<string, FieldInfo> m_Fields =
+                new Dictionary<string, FieldInfo>();
+
+        protected Dictionary<string, string> m_FieldTypes = new Dictionary<string, string>();
+
+        protected List<string> m_ColumnNames = null;
+        protected string m_Realm;
+        protected FieldInfo m_DataField = null;
+
+        protected virtual Assembly Assembly
+        {
+            get { return GetType().Assembly; }
+        }
+
+        public PGSQLGenericTableHandler(string connectionString,
+                string realm, string storeName)
+            : base(connectionString)
+        {
+            m_Realm = realm;
+            
+            m_ConnectionString = connectionString;
+
+            if (storeName != String.Empty)
+            {
+                using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
+                {
+                    conn.Open();
+                    Migration m = new Migration(conn, GetType().Assembly, storeName);
+                    m.Update();
+                }
+
+            }
+            m_database = new PGSQLManager(m_ConnectionString);
+
+            Type t = typeof(T);
+            FieldInfo[] fields = t.GetFields(BindingFlags.Public |
+                                             BindingFlags.Instance |
+                                             BindingFlags.DeclaredOnly);
+
+            LoadFieldTypes();
+
+            if (fields.Length == 0)
+                return;
+
+            foreach (FieldInfo f in fields)
+            {
+                if (f.Name != "Data")
+                    m_Fields[f.Name] = f;
+                else
+                    m_DataField = f;
+            }
+
+        }
+
+        private void LoadFieldTypes()
+        {
+            m_FieldTypes = new Dictionary<string, string>();
+
+            string query = string.Format(@"select column_name,data_type
+                        from INFORMATION_SCHEMA.COLUMNS 
+                       where table_name = lower('{0}');
+
+                ", m_Realm);
+            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
+            using (NpgsqlCommand cmd = new NpgsqlCommand(query, conn))
+            {
+                conn.Open();
+                using (NpgsqlDataReader rdr = cmd.ExecuteReader())
+                {
+                    while (rdr.Read())
+                    {
+                        // query produces 0 to many rows of single column, so always add the first item in each row
+                        m_FieldTypes.Add((string)rdr[0], (string)rdr[1]);
+                    }
+                }
+            }
+        }
+
+        private void CheckColumnNames(NpgsqlDataReader reader)
+        {
+            if (m_ColumnNames != null)
+                return;
+
+            m_ColumnNames = new List<string>();
+
+            DataTable schemaTable = reader.GetSchemaTable();
+
+            foreach (DataRow row in schemaTable.Rows)
+            {
+                if (row["ColumnName"] != null &&
+                        (!m_Fields.ContainsKey(row["ColumnName"].ToString())))
+                    m_ColumnNames.Add(row["ColumnName"].ToString());
+
+            }
+        }
+
+        // TODO GET CONSTRAINTS FROM POSTGRESQL
+        private List<string> GetConstraints()
+        {
+            List<string> constraints = new List<string>();
+            string query = string.Format(@"SELECT kcu.column_name
+                        FROM information_schema.table_constraints tc
+                        LEFT JOIN information_schema.key_column_usage kcu
+                        ON tc.constraint_catalog = kcu.constraint_catalog
+                        AND tc.constraint_schema = kcu.constraint_schema
+                        AND tc.constraint_name = kcu.constraint_name
+
+                        LEFT JOIN information_schema.referential_constraints rc
+                        ON tc.constraint_catalog = rc.constraint_catalog
+                        AND tc.constraint_schema = rc.constraint_schema
+                        AND tc.constraint_name = rc.constraint_name
+
+                        LEFT JOIN information_schema.constraint_column_usage ccu
+                        ON rc.unique_constraint_catalog = ccu.constraint_catalog
+                        AND rc.unique_constraint_schema = ccu.constraint_schema
+                        AND rc.unique_constraint_name = ccu.constraint_name
+
+                        where tc.table_name = lower('{0}') 
+                        and lower(tc.constraint_type) in ('primary key')
+                        and kcu.column_name is not null
+                        ;", m_Realm);
+
+            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
+            using (NpgsqlCommand cmd = new NpgsqlCommand(query, conn))
+            {
+                conn.Open();
+                using (NpgsqlDataReader rdr = cmd.ExecuteReader())
+                {
+                    while (rdr.Read())
+                    {
+                        // query produces 0 to many rows of single column, so always add the first item in each row
+                        constraints.Add((string)rdr[0]);
+                    }
+                }
+                return constraints;
+            }
+        }
+
+        public virtual T[] Get(string field, string key)
+        {
+            return Get(new string[] { field }, new string[] { key });
+        }
+
+        public virtual T[] Get(string[] fields, string[] keys)
+        {
+            if (fields.Length != keys.Length)
+                return new T[0];
+
+            List<string> terms = new List<string>();
+
+            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
+            using (NpgsqlCommand cmd = new NpgsqlCommand())
+            {
+
+                for (int i = 0; i < fields.Length; i++)
+                {
+                    if ( m_FieldTypes.ContainsKey(fields[i]) )
+                        cmd.Parameters.Add(m_database.CreateParameter(fields[i], keys[i], m_FieldTypes[fields[i]]));
+                    else
+                        cmd.Parameters.Add(m_database.CreateParameter(fields[i], keys[i]));
+
+                    terms.Add(" \"" + fields[i] + "\" = :" + fields[i]);
+                }
+
+                string where = String.Join(" AND ", terms.ToArray());
+
+                string query = String.Format("SELECT * FROM {0} WHERE {1}",
+                        m_Realm, where);
+
+                cmd.Connection = conn;
+                cmd.CommandText = query;
+                conn.Open();
+                return DoQuery(cmd);
+            }
+        }
+
+        protected T[] DoQuery(NpgsqlCommand cmd)
+        {
+            List<T> result = new List<T>();
+            if (cmd.Connection == null)
+            {
+                cmd.Connection = new NpgsqlConnection(m_connectionString);
+            }
+            if (cmd.Connection.State == ConnectionState.Closed)
+            {
+                cmd.Connection.Open();
+            }
+            using (NpgsqlDataReader reader = cmd.ExecuteReader())
+            {
+                if (reader == null)
+                    return new T[0];
+
+                CheckColumnNames(reader);                
+
+                while (reader.Read())
+                {
+                    T row = new T();
+
+                    foreach (string name in m_Fields.Keys)
+                    {
+                        if (m_Fields[name].GetValue(row) is bool)
+                        {
+                            int v = Convert.ToInt32(reader[name]);
+                            m_Fields[name].SetValue(row, v != 0 ? true : false);
+                        }
+                        else if (m_Fields[name].GetValue(row) is UUID)
+                        {
+                            UUID uuid = UUID.Zero;
+
+                            UUID.TryParse(reader[name].ToString(), out uuid);
+                            m_Fields[name].SetValue(row, uuid);
+                        }
+                        else if (m_Fields[name].GetValue(row) is int)
+                        {
+                            int v = Convert.ToInt32(reader[name]);
+                            m_Fields[name].SetValue(row, v);
+                        }
+                        else
+                        {
+                            m_Fields[name].SetValue(row, reader[name]);
+                        }
+                    }
+
+                    if (m_DataField != null)
+                    {
+                        Dictionary<string, string> data =
+                                new Dictionary<string, string>();
+
+                        foreach (string col in m_ColumnNames)
+                        {
+                            data[col] = reader[col].ToString();
+
+                            if (data[col] == null)
+                                data[col] = String.Empty;
+                        }
+
+                        m_DataField.SetValue(row, data);
+                    }
+
+                    result.Add(row);
+                }
+                return result.ToArray();
+            }
+        }
+
+        public virtual T[] Get(string where)
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
+            using (NpgsqlCommand cmd = new NpgsqlCommand())
+            {
+
+                string query = String.Format("SELECT * FROM {0} WHERE {1}",
+                        m_Realm, where);
+                cmd.Connection = conn;
+                cmd.CommandText = query;
+                //m_log.WarnFormat("[PGSQLGenericTable]: SELECT {0} WHERE {1}", m_Realm, where);
+
+                conn.Open();
+                return DoQuery(cmd);
+            }
+        }
+
+        public virtual T[] Get(string where, NpgsqlParameter parameter)
+        {
+            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
+                using (NpgsqlCommand cmd = new NpgsqlCommand())
+            {
+
+                string query = String.Format("SELECT * FROM {0} WHERE {1}",
+                                             m_Realm, where);
+                cmd.Connection = conn;
+                cmd.CommandText = query;
+                //m_log.WarnFormat("[PGSQLGenericTable]: SELECT {0} WHERE {1}", m_Realm, where);
+
+                cmd.Parameters.Add(parameter);
+
+                conn.Open();
+                return DoQuery(cmd);
+            }
+        }
+
+        public virtual bool Store(T row)
+        {
+            List<string> constraintFields = GetConstraints();
+            List<KeyValuePair<string, string>> constraints = new List<KeyValuePair<string, string>>();
+
+            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
+            using (NpgsqlCommand cmd = new NpgsqlCommand())
+            {
+
+                StringBuilder query = new StringBuilder();
+                List<String> names = new List<String>();
+                List<String> values = new List<String>();
+
+                foreach (FieldInfo fi in m_Fields.Values)
+                {
+                    names.Add(fi.Name);
+                    values.Add(":" + fi.Name);
+                    // Temporarily return more information about what field is unexpectedly null for
+                    // http://opensimulator.org/mantis/view.php?id=5403.  This might be due to a bug in the 
+                    // InventoryTransferModule or we may be required to substitute a DBNull here.
+                    if (fi.GetValue(row) == null)
+                        throw new NullReferenceException(
+                            string.Format(
+                                "[PGSQL GENERIC TABLE HANDLER]: Trying to store field {0} for {1} which is unexpectedly null",
+                                fi.Name, row));
+
+                    if (constraintFields.Count > 0 && constraintFields.Contains(fi.Name))
+                    {
+                        constraints.Add(new KeyValuePair<string, string>(fi.Name, fi.GetValue(row).ToString() ));
+                    }
+                    if (m_FieldTypes.ContainsKey(fi.Name))
+                        cmd.Parameters.Add(m_database.CreateParameter(fi.Name, fi.GetValue(row), m_FieldTypes[fi.Name]));
+                    else
+                        cmd.Parameters.Add(m_database.CreateParameter(fi.Name, fi.GetValue(row)));
+                }
+
+                if (m_DataField != null)
+                {
+                    Dictionary<string, string> data =
+                            (Dictionary<string, string>)m_DataField.GetValue(row);
+
+                    foreach (KeyValuePair<string, string> kvp in data)
+                    {
+                        if (constraintFields.Count > 0 && constraintFields.Contains(kvp.Key))
+                        {
+                            constraints.Add(new KeyValuePair<string, string>(kvp.Key, kvp.Key));
+                        }
+                        names.Add(kvp.Key);
+                        values.Add(":" + kvp.Key);
+
+                        if (m_FieldTypes.ContainsKey(kvp.Key))
+                            cmd.Parameters.Add(m_database.CreateParameter("" + kvp.Key, kvp.Value, m_FieldTypes[kvp.Key]));
+                        else
+                            cmd.Parameters.Add(m_database.CreateParameter("" + kvp.Key, kvp.Value));
+                    }
+
+                }
+
+                query.AppendFormat("UPDATE {0} SET ", m_Realm);
+                int i = 0;
+                for (i = 0; i < names.Count - 1; i++)
+                {
+                    query.AppendFormat("\"{0}\" = {1}, ", names[i], values[i]);
+                }
+                query.AppendFormat("\"{0}\" = {1} ", names[i], values[i]);
+                if (constraints.Count > 0)
+                {
+                    List<string> terms = new List<string>();
+                    for (int j = 0; j < constraints.Count; j++)
+                    {
+                        terms.Add(String.Format(" \"{0}\" = :{0}", constraints[j].Key));
+                    }
+                    string where = String.Join(" AND ", terms.ToArray());
+                    query.AppendFormat(" WHERE {0} ", where);
+                    
+                }
+                cmd.Connection = conn;
+                cmd.CommandText = query.ToString();
+                
+                conn.Open();
+                if (cmd.ExecuteNonQuery() > 0)
+                {
+                    //m_log.WarnFormat("[PGSQLGenericTable]: Updating {0}", m_Realm);
+                    return true;
+                }
+                else
+                {
+                    // assume record has not yet been inserted
+
+                    query = new StringBuilder();
+                    query.AppendFormat("INSERT INTO {0} (\"", m_Realm);
+                    query.Append(String.Join("\",\"", names.ToArray()));
+                    query.Append("\") values (" + String.Join(",", values.ToArray()) + ")");
+                    cmd.Connection = conn;
+                    cmd.CommandText = query.ToString();
+                    
+                    // m_log.WarnFormat("[PGSQLGenericTable]: Inserting into {0} sql {1}", m_Realm, cmd.CommandText);
+
+                    if (conn.State != ConnectionState.Open)
+                        conn.Open();
+                    if (cmd.ExecuteNonQuery() > 0)
+                        return true;
+                }
+
+                return false;
+            }
+        }
+
+        public virtual bool Delete(string field, string key)
+        {
+            return Delete(new string[] { field }, new string[] { key });
+        }
+
+        public virtual bool Delete(string[] fields, string[] keys)
+        {
+            if (fields.Length != keys.Length)
+                return false;
+
+            List<string> terms = new List<string>();
+
+            using (NpgsqlConnection conn = new NpgsqlConnection(m_ConnectionString))
+            using (NpgsqlCommand cmd = new NpgsqlCommand())
+            {
+                for (int i = 0; i < fields.Length; i++)
+                {
+                    if (m_FieldTypes.ContainsKey(fields[i]))
+                        cmd.Parameters.Add(m_database.CreateParameter(fields[i], keys[i], m_FieldTypes[fields[i]]));
+                    else
+                        cmd.Parameters.Add(m_database.CreateParameter(fields[i], keys[i]));
+
+                    terms.Add(" \"" + fields[i] + "\" = :" + fields[i]);
+                }
+
+                string where = String.Join(" AND ", terms.ToArray());
+
+                string query = String.Format("DELETE FROM {0} WHERE {1}", m_Realm, where);
+
+                cmd.Connection = conn;
+                cmd.CommandText = query;
+                conn.Open();
+
+                if (cmd.ExecuteNonQuery() > 0)
+                {
+                    //m_log.Warn("[PGSQLGenericTable]: " + deleteCommand);
+                    return true;
+                }
+                return false;
+            }
+        }
+        public long GetCount(string field, string key)
+        {
+            return GetCount(new string[] { field }, new string[] { key });
+        }
+
+        public long GetCount(string[] fields, string[] keys)
+        {
+            if (fields.Length != keys.Length)
+                return 0;
+
+            List<string> terms = new List<string>();
+
+            using (NpgsqlCommand cmd = new NpgsqlCommand())
+            {
+                for (int i = 0; i < fields.Length; i++)
+                {
+                    cmd.Parameters.AddWithValue(fields[i], keys[i]);
+                    terms.Add("\"" + fields[i] + "\" = :" + fields[i]);
+                }
+
+                string where = String.Join(" and ", terms.ToArray());
+
+                string query = String.Format("select count(*) from {0} where {1}",
+                                             m_Realm, where);
+
+                cmd.CommandText = query;
+
+                Object result = DoQueryScalar(cmd);
+
+                return Convert.ToInt64(result);
+            }
+        }
+
+        public long GetCount(string where)
+        {
+            using (NpgsqlCommand cmd = new NpgsqlCommand())
+            {
+                string query = String.Format("select count(*) from {0} where {1}",
+                                             m_Realm, where);
+
+                cmd.CommandText = query;
+
+                object result = DoQueryScalar(cmd);
+
+                return Convert.ToInt64(result);
+            }
+        }
+
+        public object DoQueryScalar(NpgsqlCommand cmd)
+        {
+            using (NpgsqlConnection dbcon = new NpgsqlConnection(m_ConnectionString))
+            {
+                dbcon.Open();
+                cmd.Connection = dbcon;
+
+                return cmd.ExecuteScalar();
+            }
+        }
+    }
+}