/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2009, 2015 Oracle and/or its affiliates.  All rights reserved.
 *
 */
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Xml;
using BerkeleyDB;
using NUnit.Framework;

namespace CsharpAPITest
{
	public class Configuration
	{
		public static Random random = new Random();

		/*
		 * Configure the value with data in xml and return true or
		 * false to indicate if the value is configured. If there
		 * is no testing data and it is optional, return false. If
		 * there is no testing data in xml and it is compulsory,
		 * ConfigNotFoundException will be thrown. If any testing
		 * data is provided, the value will be set by the testing
		 * data and true will be returned.
		 */
		#region Config
		public static void ConfigAckPolicy(XmlElement xmlElem,
		    string name, ref AckPolicy ackPolicy, bool compulsory)
		{
			XmlNode xmlNode = XMLReader.GetNode(xmlElem,
			    name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				string policy = xmlNode.InnerText;
				if (policy == "ALL")
					ackPolicy = AckPolicy.ALL;
				else if (policy == "ALL_PEERS")
					ackPolicy = AckPolicy.ALL_PEERS;
				else if (policy == "NONE")
					ackPolicy = AckPolicy.NONE;
				else if (policy == "ONE")
					ackPolicy = AckPolicy.ONE;
				else if (policy == "ONE_PEER")
					ackPolicy = AckPolicy.ONE_PEER;
				else if (policy == "QUORUM")
					ackPolicy = AckPolicy.QUORUM;
				else
					throw new InvalidConfigException(name);
			}
		}

		public static bool ConfigBool(XmlElement xmlElem,
		    string name, ref bool value, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			value = bool.Parse(xmlNode.InnerText);
			return true;
		}

		public static bool ConfigByteOrder(XmlElement xmlElem,
		    string name, ref ByteOrder byteOrder, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			byteOrder = ByteOrder.FromConst(
			int.Parse(xmlNode.InnerText));
			return true;
		}

		public static bool ConfigByteMatrix(XmlElement xmlElem,
		    string name, ref byte[,] byteMatrix, bool compulsory)
		{
			int i, j, matrixLen;

			XmlNode xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			matrixLen = xmlNode.ChildNodes.Count;
			byte[,] matrix = new byte[matrixLen, matrixLen];
			for (i = 0; i < matrixLen; i++)
			{
				if (xmlNode.ChildNodes[i].ChildNodes.Count != matrixLen)
					throw new ConfigNotFoundException(name);
				for (j = 0; j < matrixLen; j++)
				{
					matrix[i, j] = byte.Parse(
                        xmlNode.ChildNodes[i].ChildNodes[j].InnerText);
				}
			}

			byteMatrix = matrix;
			return true;
		}

		public static bool ConfigCacheInfo(XmlElement xmlElem,
		    string name, ref CacheInfo cacheSize, bool compulsory)
		{
			XmlNode xmlNode;
			XmlNode xmlChildNode;
			uint bytes;
			uint gigabytes;
			int nCaches;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				if ((xmlChildNode = XMLReader.GetNode(
				    (XmlElement)xmlNode, "Bytes")) != null)
				{
                    bytes = uint.Parse(xmlChildNode.InnerText);
                    if ((xmlChildNode = XMLReader.GetNode(
                         (XmlElement)xmlNode, "Gigabytes")) != null)
                    {
                        gigabytes = uint.Parse(xmlChildNode.InnerText);
                        if ((xmlChildNode = XMLReader.GetNode(
                            (XmlElement)xmlNode, "NCaches")) != null)
                        {
                            nCaches = int.Parse(xmlChildNode.InnerText);
                            cacheSize = new CacheInfo(gigabytes,bytes,nCaches);
                            return true;
                        }
                    }
				}
			}

			return false;
		}

		public static bool ConfigCachePriority(XmlElement xmlElem,
		    string name, ref CachePriority cachePriority, bool compulsory)
		{
			XmlNode xmlNode;
			string priority;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			priority = xmlNode.InnerText;
			if (priority == "DEFAULT")
				cachePriority = CachePriority.DEFAULT;
			else if (priority == "HIGH")
				cachePriority = CachePriority.HIGH;
			else if (priority == "LOW")
				cachePriority = CachePriority.LOW;
			else if (priority == "VERY_HIGH")
				cachePriority = CachePriority.VERY_HIGH;
			else if (priority == "VERY_LOW")
				cachePriority = CachePriority.VERY_LOW;
			else
				throw new InvalidConfigException(name);

			return true;
		}

		public static bool ConfigCreatePolicy(XmlElement xmlElem,
		    string name, ref CreatePolicy createPolicy, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			if (xmlNode.InnerText == "ALWAYS")
				createPolicy = CreatePolicy.ALWAYS;
			else if (xmlNode.InnerText == "IF_NEEDED")
				createPolicy = CreatePolicy.IF_NEEDED;
			else if (xmlNode.InnerText == "NEVER")
				createPolicy = CreatePolicy.NEVER;
			else
				throw new InvalidConfigException(name);

			return true;
		}

		public static bool ConfigDuplicatesPolicy(XmlElement xmlElem,
		    string name, ref DuplicatesPolicy duplicatePolicy,bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			if (xmlNode.InnerText == "NONE")
				duplicatePolicy = DuplicatesPolicy.NONE;
			else if (xmlNode.InnerText == "SORTED")
				duplicatePolicy = DuplicatesPolicy.SORTED;
			else if (xmlNode.InnerText == "UNSORTED")
				duplicatePolicy = DuplicatesPolicy.UNSORTED;
			else
				throw new InvalidConfigException(name);

			return true;
		}

		public static bool ConfigDateTime(XmlElement xmlElem,
		    string name, ref DateTime time, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			time = DateTime.Parse(xmlNode.InnerText);
			return true;
		}

		public static bool ConfigDeadlockPolicy(XmlElement xmlElem,
		    string name, ref DeadlockPolicy deadlockPolicy, bool compulsory)
		{
			XmlNode xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			string policy = xmlNode.InnerText;
			if (policy == "DEFAULT")
				deadlockPolicy = DeadlockPolicy.DEFAULT;
			else if (policy == "EXPIRE")
				deadlockPolicy = DeadlockPolicy.EXPIRE;
			else if (policy == "MAX_LOCKS")
				deadlockPolicy = DeadlockPolicy.MAX_LOCKS;
			else if (policy == "MAX_WRITE")
				deadlockPolicy = DeadlockPolicy.MAX_WRITE;
			else if (policy == "MIN_LOCKS")
				deadlockPolicy = DeadlockPolicy.MIN_LOCKS;
			else if (policy == "MIN_WRITE")
				deadlockPolicy = DeadlockPolicy.MIN_WRITE;
			else if (policy == "OLDEST")
				deadlockPolicy = DeadlockPolicy.OLDEST;
			else if (policy == "RANDOM")
				deadlockPolicy = DeadlockPolicy.RANDOM;
			else if (policy == "YOUNGEST")
				deadlockPolicy = DeadlockPolicy.YOUNGEST;
			else
				throw new InvalidConfigException(name);
			return true;
		}

		public static bool ConfigEncryption(XmlElement xmlElem,
		    string name, DatabaseConfig dbConfig, bool compulsory)
		{
            EncryptionAlgorithm alg;
            XmlNode xmlNode;
            string tmp, password;
            
			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			password = XMLReader.GetNode((XmlElement)xmlNode,
			    "password").InnerText;
			tmp = XMLReader.GetNode((XmlElement)xmlNode, "algorithm").InnerText;
            if (tmp == "AES")
                alg = EncryptionAlgorithm.AES;
            else
                alg = EncryptionAlgorithm.DEFAULT;
			dbConfig.SetEncryption(password, alg);
			return true;
		}

		public static bool ConfigInt(XmlElement xmlElem,
		    string name, ref int value, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			value = int.Parse(xmlNode.InnerText);
			return true;
		}

		public static bool ConfigIsolation(XmlElement xmlElem,
		    string name, ref Isolation value, bool compulsory)
		{
			XmlNode xmlNode;
			int isolationDegree;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			isolationDegree = int.Parse(xmlNode.InnerText);
			if (isolationDegree == 1)
				value = Isolation.DEGREE_ONE;
			else if (isolationDegree == 2)
				value = Isolation.DEGREE_TWO;
			else if (isolationDegree == 3)
				value = Isolation.DEGREE_THREE;
			else
				throw new InvalidConfigException(name);

			return true;
		}

		public static bool ConfigLogFlush(XmlElement xmlElem,
		    string name, ref TransactionConfig.LogFlush value,
		    bool compulsory)
		{
			XmlNode xmlNode;
			string logFlush;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			logFlush = xmlNode.InnerText;
			if (logFlush == "DEFAULT")
				value = TransactionConfig.LogFlush.DEFAULT;
			else if (logFlush == "NOSYNC")
				value = TransactionConfig.LogFlush.NOSYNC;
			else if (logFlush == "WRITE_NOSYNC")
				value = TransactionConfig.LogFlush.WRITE_NOSYNC;
			else if (logFlush == "SYNC")
				value = TransactionConfig.LogFlush.SYNC;
			else
				throw new InvalidConfigException(name);

			return true;
		}

		public static bool ConfigLong(XmlElement xmlElem,
		    string name, ref long value, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			value = long.Parse(xmlNode.InnerText);
			return true;
		}

		public static bool ConfigMaxSequentialWrites(
		    XmlElement xmlElem, string name, 
		    MPoolConfig mpoolConfig, bool compulsory)
		{
			XmlNode xmlNode;
			uint pause;
			int writes;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			pause = uint.Parse(XMLReader.GetNode(
			    (XmlElement)xmlNode, "pause").InnerText);
			writes = int.Parse(XMLReader.GetNode(
			    (XmlElement)xmlNode,"maxWrites").InnerText);
			mpoolConfig.SetMaxSequentialWrites(writes, pause);
			return true;
		}

		public static bool ConfigReplicationHostAddress(
		    XmlElement xmlElem, string name,
		    ref DbSiteConfig siteConfig, bool compulsory)
		{
			XmlNode xmlNode = XMLReader.GetNode(
			    xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			    siteConfig.Host = XMLReader.GetNode(
			    (XmlElement)xmlNode, "Host").InnerText;
			    siteConfig.Port = uint.Parse(XMLReader.GetNode(
			    (XmlElement)xmlNode, "Port").InnerText);
			return true;
		}
		
		public static bool ConfigString(XmlElement xmlElem,
		    string name, ref string valChar, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			valChar = xmlNode.InnerText;
			return true;
		}

		public static bool ConfigStringList(XmlElement xmlElem,
		    string name, ref List<string> strings, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			XmlNodeList list = xmlNode.ChildNodes;
			for (int i = 0; i < list.Count; i++)
				strings.Add(list[i].InnerText);

			return true;
		}

		public static bool ConfigUint(XmlElement xmlElem,
		    string name, ref uint value, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			value = uint.Parse(xmlNode.InnerText);
			return true;
		}

		public static bool ConfigVerboseMessages(
		    XmlElement xmlElem, string name, 
		    ref VerboseMessages verbose, bool compulsory)
		{
			XmlNode xmlNode = XMLReader.GetNode(xmlElem, 
			    name);
			if (xmlNode == null && compulsory == false)
				return false;
			else if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);

			ConfigBool((XmlElement)xmlNode, "AllFileOps",
			    ref verbose.AllFileOps, compulsory);
			ConfigBool((XmlElement)xmlNode, "Deadlock",
			    ref verbose.Deadlock, compulsory);
			ConfigBool((XmlElement)xmlNode, "FileOps",
			    ref verbose.FileOps, compulsory);
			ConfigBool((XmlElement)xmlNode, "Recovery",
			    ref verbose.Recovery, compulsory);
			ConfigBool((XmlElement)xmlNode, "Register",
			    ref verbose.Register, compulsory);
			ConfigBool((XmlElement)xmlNode, "Replication",
			    ref verbose.Replication, compulsory);
			ConfigBool((XmlElement)xmlNode, "ReplicationElection",
			    ref verbose.ReplicationElection, compulsory);
			ConfigBool((XmlElement)xmlNode, "ReplicationLease",
			    ref verbose.ReplicationLease, compulsory);
			ConfigBool((XmlElement)xmlNode, "ReplicationMessages",
			    ref verbose.ReplicationMessages, compulsory);
			ConfigBool((XmlElement)xmlNode, "ReplicationMisc",
			    ref verbose.ReplicationMisc, compulsory);
			ConfigBool((XmlElement)xmlNode, "ReplicationSync",
			    ref verbose.ReplicationSync, compulsory);
			ConfigBool((XmlElement)xmlNode, "RepMgrConnectionFailure",
			    ref verbose.RepMgrConnectionFailure, compulsory);
			ConfigBool((XmlElement)xmlNode, "RepMgrMisc",
			    ref verbose.RepMgrMisc, compulsory);
			ConfigBool((XmlElement)xmlNode, "WaitsForTable",
			    ref verbose.WaitsForTable, compulsory);
			return true;
		}

		#endregion Config

		/*
		 * Confirm that the given value is the same with that in 
		 * xml. If there is no testing data in xml and it is 
		 * compulsory, the ConfigNotFoundException will be thrown. 
		 * If there is no testing data and it is optional, nothing 
		 * will be done. If any testing data is provided, the value 
		 * will be checked.
		 */
		#region Confirm
		public static void ConfirmAckPolicy(XmlElement xmlElem,
		    string name, AckPolicy ackPolicy, bool compulsory)
		{
			XmlNode xmlNode = XMLReader.GetNode(xmlElem,
			    name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				string policy = xmlNode.InnerText;
				if (policy == "ALL")
					Assert.AreEqual(AckPolicy.ALL, 
                                            ackPolicy);
				else if (policy == "ALL_PEERS")
					Assert.AreEqual(AckPolicy.ALL_PEERS, 
                                            ackPolicy);
				else if (policy == "NONE")
					Assert.AreEqual(AckPolicy.NONE, 
                                            ackPolicy);
				else if (policy == "ONE")
					Assert.AreEqual(AckPolicy.ONE, 
                                            ackPolicy);
				else if (policy == "ONE_PEER")
					Assert.AreEqual(AckPolicy.ONE_PEER, 
                                            ackPolicy);
				else if (policy == "QUORUM")
					Assert.AreEqual(AckPolicy.QUORUM, 
                                            ackPolicy);
				else
					throw new InvalidConfigException(name);
			}
		}

		public static void ConfirmBool(XmlElement xmlElem,
		    string name, bool value, bool compulsory)
		{
			XmlNode xmlNode;
			bool expected;

			xmlNode = XMLReader.GetNode(xmlElem,
			    name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				if (xmlNode.ChildNodes.Count > 1)
				{
					expected = bool.Parse(
					    xmlNode.FirstChild.NextSibling.InnerText);
					Assert.AreEqual(expected, value);
				}
			}
		}

		/*
		 * If configure MACHINE, the ByteOrder in database will 
		 * switch to LITTLE_ENDIAN or BIG_ENDIAN according to the 
		 * current machine.
		 */
		public static void ConfirmByteOrder(XmlElement xmlElem,
		    string name, ByteOrder byteOrder, bool compulsory)
		{
			XmlNode xmlNode;
			ByteOrder specOrder;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				specOrder = ByteOrder.FromConst(int.Parse(
				    xmlNode.InnerText));
				if (specOrder == ByteOrder.MACHINE)
					Assert.AreNotEqual(specOrder, byteOrder);
				else
					Assert.AreEqual(specOrder, byteOrder);
			}
		}

		public static void ConfirmByteMatrix(XmlElement xmlElem,
		    string name, byte[,] byteMatrix, bool compulsory)
		{
			int i, j, matrixLen;

			XmlNode xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				/*
				 * If the length of the 2 matrixes are not 
				 * the same, the matrixes are definately 
				 * not equal.
				 */
				matrixLen = xmlNode.ChildNodes.Count;
				Assert.AreEqual(matrixLen * matrixLen,byteMatrix.Length);

				/*
				 * Go over every element in the matrix to 
				 * see if the same with the given xml data.
				 */
				for (i = 0; i < matrixLen; i++)
				{
					if (xmlNode.ChildNodes[i].ChildNodes.Count != matrixLen)
						throw new ConfigNotFoundException(name);
					for (j = 0; j < matrixLen; j++)
						Assert.AreEqual(
						    byte.Parse(xmlNode.ChildNodes[i].ChildNodes[j].InnerText), 
                                                    byteMatrix[i, j]);
				}
			}
		}

		public static void ConfirmCachePriority(XmlElement xmlElem,
		    string name, CachePriority priority, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				if (xmlNode.InnerText == "DEFAULT")
					Assert.AreEqual(CachePriority.DEFAULT, priority);
				else if (xmlNode.InnerText == "HIGH")
					Assert.AreEqual(CachePriority.HIGH, priority);
				else if (xmlNode.InnerText == "LOW")
					Assert.AreEqual(CachePriority.LOW, priority);
				else if (xmlNode.InnerText == "VERY_HIGH")
					Assert.AreEqual(CachePriority.VERY_HIGH, priority);
				else if (xmlNode.InnerText == "VERY_LOW")
					Assert.AreEqual(CachePriority.VERY_LOW, priority);
			}
		}

		public static void ConfirmCacheSize(XmlElement xmlElem,
		    string name, CacheInfo cache, bool compulsory)
		{
			uint bytes;
			uint gigabytes;
			int nCaches;
			XmlNode xmlNode;
			XmlNode xmlChildNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				if ((xmlChildNode = XMLReader.GetNode(
				    (XmlElement)xmlNode, "Bytes")) != null)
				{
					bytes = uint.Parse(xmlChildNode.InnerText);
					if ((xmlChildNode = XMLReader.GetNode(
					    (XmlElement)xmlNode, "Gigabytes")) != null)
					{
						gigabytes = uint.Parse(xmlChildNode.InnerText);
						if ((xmlChildNode = XMLReader.GetNode(
						    (XmlElement)xmlNode,
						    "NCaches")) != null)
						{
							nCaches = int.Parse(xmlChildNode.InnerText);
							Assert.LessOrEqual(bytes, cache.Bytes);
							Assert.AreEqual(gigabytes, cache.Gigabytes);
							Assert.AreEqual(nCaches, cache.NCaches);
						}
					}
				}
			}
		}

		/*
		 * If bytes in CacheSize is assigned, the bytes in cachesize
		 * couldn't be the default one.
		 */
		public static void ConfirmCacheSize(XmlElement xmlElem,
		    string name, CacheInfo cache, uint defaultCache,
		    bool compulsory)
		{
			uint bytes;
			uint gigabytes;
			int nCaches;
			XmlNode xmlNode;
			XmlNode xmlChildNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				if ((xmlChildNode = XMLReader.GetNode(
				    (XmlElement)xmlNode, "Bytes")) != null)
				{
					bytes = defaultCache;
					if ((xmlChildNode = XMLReader.GetNode(
					    (XmlElement)xmlNode, "Gigabytes")) != null)
					{
						gigabytes = uint.Parse(xmlChildNode.InnerText);
						if ((xmlChildNode = XMLReader.GetNode(
						    (XmlElement)xmlNode, "NCaches")) != null)
						{
							nCaches = int.Parse(xmlChildNode.InnerText);
							Assert.AreNotEqual(bytes, cache.Bytes);
							Assert.AreEqual(gigabytes, cache.Gigabytes);
							Assert.AreEqual(nCaches, cache.NCaches);
						}
					}
				}
			}
		}

		public static void ConfirmCreatePolicy(XmlElement xmlElem,
		    string name, CreatePolicy createPolicy, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				if (xmlNode.InnerText == "ALWAYS")
					Assert.IsTrue(createPolicy.Equals(CreatePolicy.ALWAYS));
				else if (xmlNode.InnerText == "IF_NEEDED")
					Assert.IsTrue(createPolicy.Equals(CreatePolicy.IF_NEEDED));
				else if (xmlNode.InnerText == "NEVER")
					Assert.IsTrue(createPolicy.Equals(CreatePolicy.NEVER));
			}
		}

		public static void ConfirmDataBaseType(XmlElement xmlElem,
		    string name, DatabaseType dbType, bool compulsory)
		{
			XmlNode xmlNode;
			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				if (xmlNode.InnerText == "BTREE")
					Assert.AreEqual(dbType, DatabaseType.BTREE);
				else if (xmlNode.InnerText == "HASH")
					Assert.AreEqual(dbType, DatabaseType.HASH);
				else if (xmlNode.InnerText == "QUEUE")
					Assert.AreEqual(dbType, DatabaseType.QUEUE);
				else if (xmlNode.InnerText == "RECNO")
					Assert.AreEqual(dbType, DatabaseType.RECNO);
				else if (xmlNode.InnerText == "UNKNOWN")
					Assert.AreEqual(dbType, DatabaseType.UNKNOWN);
			}
		}

		public static void ConfirmDateTime(XmlElement xmlElem,
		    string name, DateTime time, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
				Assert.AreEqual(DateTime.Parse(
				    xmlNode.InnerText), time);
		}

		public static void ConfirmDeadlockPolicy(XmlElement xmlElem,
		    string name, DeadlockPolicy deadlockPolicy, bool compulsory)
		{
			XmlNode xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				string policy = xmlNode.InnerText;
				if (policy == "DEFAULT")
					Assert.AreEqual(DeadlockPolicy.DEFAULT, deadlockPolicy);
				else if (policy == "EXPIRE")
					Assert.AreEqual(DeadlockPolicy.EXPIRE, deadlockPolicy);
				else if (policy == "MAX_LOCKS")
					Assert.AreEqual(DeadlockPolicy.MAX_LOCKS, deadlockPolicy);
				else if (policy == "MAX_WRITE")
					Assert.AreEqual(DeadlockPolicy.MAX_WRITE, deadlockPolicy);
				else if (policy == "MIN_LOCKS")
					Assert.AreEqual(DeadlockPolicy.MIN_LOCKS, deadlockPolicy);
				else if (policy == "MIN_WRITE")
					Assert.AreEqual(DeadlockPolicy.MIN_WRITE, deadlockPolicy);
				else if (policy == "OLDEST")
					Assert.AreEqual(DeadlockPolicy.OLDEST, deadlockPolicy);
				else if (policy == "RANDOM")
					Assert.AreEqual(DeadlockPolicy.RANDOM, deadlockPolicy);
				else if (policy == "YOUNGEST")
					Assert.AreEqual(DeadlockPolicy.YOUNGEST, deadlockPolicy);
				else
					throw new InvalidConfigException(name);
			}
		}

		public static void ConfirmDuplicatesPolicy(
		    XmlElement xmlElem, string name,
		    DuplicatesPolicy duplicatedPolicy, bool compulsory)
		{
			XmlNode xmlNode;
			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				if (xmlNode.InnerText == "NONE")
					Assert.AreEqual(duplicatedPolicy, DuplicatesPolicy.NONE);
				else if (xmlNode.InnerText == "SORTED")
					Assert.AreEqual(duplicatedPolicy, DuplicatesPolicy.SORTED);
				else if (xmlNode.InnerText == "UNSORTED")
					Assert.AreEqual(duplicatedPolicy, DuplicatesPolicy.UNSORTED);
			}
		}

		public static void ConfirmEncryption(XmlElement xmlElem,
		    string name, string dPwd, EncryptionAlgorithm dAlg, bool compulsory)
		{
            EncryptionAlgorithm alg;
			XmlNode xmlNode = XMLReader.GetNode(xmlElem, 
			    name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				string password = XMLReader.GetNode(
				    (XmlElement)xmlNode, "password").InnerText;
				string tmp = XMLReader.GetNode(
                    (XmlElement)xmlNode, "algorithm").InnerText;
                if (tmp == "AES")
                    alg = EncryptionAlgorithm.AES;
                else
                    alg = EncryptionAlgorithm.DEFAULT;
				Assert.AreEqual(dAlg, alg);
				Assert.AreEqual(dPwd, dPwd);
			}
		}

		public static void ConfirmInt(XmlElement xmlElem,
		    string name, int value, bool compulsory)
		{
			XmlNode xmlNode;
			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
				Assert.AreEqual(int.Parse(xmlNode.InnerText), value);
		}

		public static void ConfirmIsolation(XmlElement xmlElem,
		    string name, Isolation value, bool compulsory)
		{
			XmlNode xmlNode;
			int isolationDegree;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				isolationDegree = int.Parse(xmlNode.InnerText);
				if (isolationDegree == 1)
					Assert.AreEqual(Isolation.DEGREE_ONE, value);
				else if (isolationDegree == 2)
					Assert.AreEqual(Isolation.DEGREE_TWO, value);
				else if (isolationDegree == 3)
					Assert.AreEqual(Isolation.DEGREE_THREE, value);
				else
					throw new InvalidConfigException(name);
			}
		}

		public static void ConfirmLogFlush(XmlElement xmlElem,
		    string name, TransactionConfig.LogFlush value,
		    bool compulsory)
		{
			XmlNode xmlNode;
			string logFlush;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				logFlush = xmlNode.InnerText;
				if (logFlush == "DEFAULT")
					Assert.AreEqual(TransactionConfig.LogFlush.DEFAULT, value);
				else if (logFlush == "NOSYNC")
					Assert.AreEqual(TransactionConfig.LogFlush.NOSYNC, value);
				else if (logFlush == "WRITE_NOSYNC")
					Assert.AreEqual(TransactionConfig.LogFlush.WRITE_NOSYNC, value);
				else if (logFlush == "SYNC")
					Assert.AreEqual(TransactionConfig.LogFlush.SYNC, value);
				else
					throw new InvalidConfigException(name);
			}
		}

		public static void ConfirmLong(XmlElement xmlElem,
		    string name, long value, bool compulsory)
		{
			XmlNode xmlNode;
			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
				Assert.AreEqual(long.Parse(xmlNode.InnerText), value);
		}

		public static void ConfirmMaxSequentialWrites(
		    XmlElement xmlElem, string name,
		    uint mPause, int mWrites, bool compulsory)
		{
			XmlNode xmlNode;
			uint pause;
			int writes;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				writes = int.Parse(XMLReader.GetNode(
				    (XmlElement)xmlNode, "maxWrites").InnerText);
				pause = uint.Parse(XMLReader.GetNode(
				    (XmlElement)xmlNode, "pause").InnerText);

				Assert.AreEqual(mPause, pause);
				Assert.AreEqual(mWrites, writes);
			}
		}

		public static void ConfirmReplicationHostAddress(
		    XmlElement xmlElem, string name,
		    DbSiteConfig siteConfig, bool compulsory)
		{
			XmlNode xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				string host = XMLReader.GetNode(
				    (XmlElement)xmlNode, "Host").InnerText;
				uint port = uint.Parse(XMLReader.GetNode(
				    (XmlElement)xmlNode, "Port").InnerText);

				Assert.AreEqual(host, siteConfig.Host);
				Assert.AreEqual(port, siteConfig.Port);
			}
		}

		public static void ConfirmString(XmlElement xmlElem,
		    string name, string str, bool compulsory)
		{
			XmlNode xmlNode;

			if (str != null)
			{
				xmlNode = XMLReader.GetNode(xmlElem, name);
				if (xmlNode == null && compulsory == true)
					throw new ConfigNotFoundException(name);
				else if (xmlNode != null)
				{
					if (xmlNode.HasChildNodes)
						Assert.AreEqual(
						    xmlNode.FirstChild.InnerText, str);
				}
			}
		}

		public static void ConfirmStringList(XmlElement xmlElem,
		    string name, List<string> strings, bool compulsory)
		{
			XmlNode xmlNode;

			if (strings != null)
			{
				xmlNode = XMLReader.GetNode(xmlElem, name);
				if (xmlNode == null && compulsory == true)
					throw new ConfigNotFoundException(name);
				else if (xmlNode != null)
				{
					if (xmlNode.HasChildNodes)
					{
						XmlNodeList list = xmlNode.ChildNodes;
						for (int i = 0; i < xmlNode.ChildNodes.Count;i++)
							Assert.IsTrue(
							    strings.Contains(list[i].InnerText));
					}
				}
			}
		}

		public static void ConfirmUint(XmlElement xmlElem,
		    string name, uint value, bool compulsory)
		{
			XmlNode xmlNode;

			xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
				Assert.AreEqual(uint.Parse(xmlNode.InnerText), value);
		}

		public static void ConfirmVerboseMessages(
		    XmlElement xmlElem, string name, 
		    VerboseMessages verbose, bool compulsory)
		{
			XmlNode xmlNode = XMLReader.GetNode(xmlElem, name);
			if (xmlNode == null && compulsory == true)
				throw new ConfigNotFoundException(name);
			else if (xmlNode != null)
			{
				ConfirmBool((XmlElement)xmlNode, "AllFileOps",
				    verbose.AllFileOps, compulsory);
				ConfirmBool((XmlElement)xmlNode, "Deadlock",
				    verbose.Deadlock, compulsory);
				ConfirmBool((XmlElement)xmlNode, "FileOps",
				    verbose.FileOps, compulsory);
				ConfirmBool((XmlElement)xmlNode, "Recovery",
				    verbose.Recovery, compulsory);
				ConfirmBool((XmlElement)xmlNode, "Register",
				    verbose.Register, compulsory);
				ConfirmBool((XmlElement)xmlNode, "Replication",
				    verbose.Replication, compulsory);
				ConfirmBool((XmlElement)xmlNode, "ReplicationElection",
				    verbose.ReplicationElection, compulsory);
				ConfirmBool((XmlElement)xmlNode, "ReplicationLease",
				    verbose.ReplicationLease, compulsory);
				ConfirmBool((XmlElement)xmlNode, "ReplicationMessages",
				    verbose.ReplicationMessages, compulsory);
				ConfirmBool((XmlElement)xmlNode, "ReplicationMisc",
				    verbose.ReplicationMisc, compulsory);
				ConfirmBool((XmlElement)xmlNode, "ReplicationSync",
				    verbose.ReplicationSync, compulsory);
				ConfirmBool((XmlElement)xmlNode, "RepMgrConnectionFailure",
				    verbose.RepMgrConnectionFailure, compulsory);
				ConfirmBool((XmlElement)xmlNode, "RepMgrMisc", 
				    verbose.RepMgrMisc, compulsory);
				ConfirmBool((XmlElement)xmlNode,"WaitsForTable", 
				    verbose.WaitsForTable, compulsory);
			}
		}
		#endregion Confirm

		public static void dbtFromString(DatabaseEntry dbt, string s)
		{
			dbt.Data = System.Text.Encoding.ASCII.GetBytes(s);
		}

		public static string strFromDBT(DatabaseEntry dbt)
		{

			System.Text.ASCIIEncoding decode = new ASCIIEncoding();
			return decode.GetString(dbt.Data);
		}

		/*
		 * Reading params successfully returns true. Unless returns 
		 * false. The retrieved Xml fragment is returning in xmlElem.
		 */
		public static XmlElement TestSetUp(string testFixtureName, string testName)
		{
			XMLReader xmlReader = new XMLReader("../../AllTestData.xml");
			XmlElement xmlElem = xmlReader.GetXmlElement(testFixtureName, testName);
			if (xmlElem == null)
				throw new ConfigNotFoundException(testFixtureName + ":" + testName);
			else
				return xmlElem;
		}

		/*
		 * Delete existing test output directory and its files, 
		 * then create a new one.
		 */
		public static void ClearDir(string testDir)
		{
			if (Directory.Exists(testDir))
				Directory.Delete(testDir, true);
			Directory.CreateDirectory(testDir);
		}

		public static string RandomString(int max) {
			string text = "";
			int len = random.Next(max);

			for (int i = 0; i < len; i++)
				text += "a";

			return text;
		}
	}
}