Exemplo n.º 1
0
        public ExternalInterfaceNamespace(ExternalInterfaceSchema externalInterfaceSchema, MiddleTierTable middleTierTable)
        {
            // Initialize the object.
            this.externalInterfaceSchema = externalInterfaceSchema;
            this.middleTierTable         = middleTierTable;

            // Name space and import declarations
            // namespace MarkThree.MiddleTier {
            //	  using System;
            //    using System.Data;
            //    using System.Xml;
            //    using System.Runtime.Serialization;
            this.Name = externalInterfaceSchema.TargetNamespace;
            foreach (string reference in externalInterfaceSchema.References)
            {
                this.Imports.Add(new CodeNamespaceImport(reference));
            }
            this.Imports.Add(new CodeNamespaceImport("MarkThree"));
            this.Imports.Add(new CodeNamespaceImport("System"));
            this.Imports.Add(new CodeNamespaceImport("System.Collections"));
            this.Imports.Add(new CodeNamespaceImport("System.Data"));
            this.Imports.Add(new CodeNamespaceImport("System.Data.SqlClient"));

            this.Types.Add(new ExternalInterfaceClass(externalInterfaceSchema, middleTierTable));
        }
Exemplo n.º 2
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        /// <summary>
        /// Construct a CodeDOM that will find a record based on an external identifier and a configuration.
        /// </summary>
        public FindRequiredKey(ExternalInterfaceSchema ExternalInterfaceSchema, MiddleTierTable middleTierTable) : base(ExternalInterfaceSchema, middleTierTable)
        {
            // These are shorthand notations for values that are use often to construct the tables:
            string tableVariable  = string.Format("{0}Table", this.MiddleTierTable.ElementTable.Name[0].ToString().ToLower() + this.MiddleTierTable.ElementTable.Name.Remove(0, 1));
            string primaryKeyName = this.ExternalInterfaceSchema.RemoveXPath(this.MiddleTierTable.PrimaryKey.Fields[0]);

            // Find the primary column element.
            XmlSchemaElement primaryColumnElement = null;

            foreach (XmlSchemaElement xmlSchemaElement in this.MiddleTierTable.ElementColumns)
            {
                if (xmlSchemaElement.Name == this.ExternalInterfaceSchema.RemoveXPath(this.MiddleTierTable.PrimaryKey.Fields[0]))
                {
                    primaryColumnElement = xmlSchemaElement;
                }
            }

            // Method Header:
            //        /// <summary>Finds a a Algorithm record using a configuration and an external identifier.</summary>
            //        /// <param name="configurationId">Specified which mappings (user id columns) to use when looking up external identifiers.</param>
            //        /// <param name="externalId">The external identifier for the record.</param>
            //        public static int FindRequiredKey(string configurationId, string externalId)
            //        {
            Type returnType = ((XmlSchemaDatatype)primaryColumnElement.ElementType).ValueType;

            this.Comments.Add(new CodeCommentStatement(string.Format("<summary>Finds a a {0} record using a configuration and an external identifier.</summary>", this.MiddleTierTable.ElementTable.Name), true));
            this.Comments.Add(new CodeCommentStatement("<param name=\"configurationId\">Specified which mappings (user id columns) to use when looking up external identifiers.</param>", true));
            this.Comments.Add(new CodeCommentStatement("<param name=\"externalId\">The external identifier for the record.</param>", true));
            this.Attributes = MemberAttributes.Public | MemberAttributes.Final | MemberAttributes.Static;
            this.ReturnType = new CodeTypeReference(returnType);
            this.Name       = "FindRequiredKey";
            this.Parameters.Add(new CodeParameterDeclarationExpression(typeof(object), "configurationId"));
            this.Parameters.Add(new CodeParameterDeclarationExpression(typeof(string), "parameterId"));
            this.Parameters.Add(new CodeParameterDeclarationExpression(typeof(string), "externalId"));

            //            // Look up the internal identifier using the configuration to select the ExternalId column and the external identifier to identify the record
            //            int internalId = Algorithm.FindKey(configurationId, externalId);
            //            if ((internalId == -1))
            //            {
            //                throw new Exception(string.Format("The Algorithm table does not have a record identified by \'{0}\'", externalId));
            //            }
            CodeExpression returnValue = returnType == typeof(int) ?
                                         new CodePropertyReferenceExpression(new CodeTypeReferenceExpression(typeof(int)), "MinValue") :
                                         new CodePropertyReferenceExpression(new CodeTypeReferenceExpression(typeof(string)), "Empty");

            this.Statements.Add(new CodeCommentStatement("Look up the internal identifier using the configuration to select the ExternalId column and the external identifier to identify the record"));
            CodeExpression[] exceptionVariables = new CodeExpression[] { new CodePrimitiveExpression(string.Format("The {0} table does not have a record identified by '{1}'", this.MiddleTierTable.ElementTable.Name, "{0}")), new CodeArgumentReferenceExpression("externalId") };
            this.Statements.Add(new CodeVariableDeclarationStatement(returnType, "internalId", new CodeMethodInvokeExpression(new CodeTypeReferenceExpression(this.MiddleTierTable.ElementTable.Name), "FindKey", new CodeExpression[] { new CodeArgumentReferenceExpression("configurationId"), new CodeArgumentReferenceExpression("parameterId"), new CodeArgumentReferenceExpression("externalId") })));
            this.Statements.Add(new CodeConditionStatement(new CodeBinaryOperatorExpression(new CodeVariableReferenceExpression("internalId"), CodeBinaryOperatorType.IdentityEquality, returnValue), new CodeThrowExceptionStatement(new CodeObjectCreateExpression("Exception", new CodeExpression[] { new CodeMethodInvokeExpression(new CodeTypeReferenceExpression(typeof(string)), "Format", exceptionVariables) }))));

            //            // Return the internal identifier.
            //            return internalId;
            this.Statements.Add(new CodeCommentStatement("Return the internal identifier."));
            this.Statements.Add(new CodeMethodReturnStatement(new CodeVariableReferenceExpression("internalId")));
        }
Exemplo n.º 3
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        /// <summary>
        /// Construct a CodeDOM that will find a record based on an external identifier and a configuration.
        /// </summary>
        public StaticConstructor(ExternalInterfaceSchema ExternalInterfaceSchema, MiddleTierTable middleTierTable)
        {
            // Initialize the object.
            this.ExternalInterfaceSchema = ExternalInterfaceSchema;
            this.middleTierTable         = middleTierTable;

            // These are shorthand notations for values that are use often to construct the tables:
            string tableVariable  = string.Format("{0}Table", middleTierTable.ElementTable.Name[0].ToString().ToLower() + middleTierTable.ElementTable.Name.Remove(0, 1));
            string primaryKeyName = ExternalInterfaceSchema.RemoveXPath(middleTierTable.PrimaryKey.Fields[0]);

            // Method Header:
            //        /// <summary>Initializes the static elements of an Object.</summary>
            //        public static int TypeConstructor(string configurationId, string parameterId, string externalId)
            //        {
            this.Comments.Add(new CodeCommentStatement(@"<summary>Initializes the static elements of an Object.</summary>", true));
            this.Attributes = MemberAttributes.Final | MemberAttributes.Static;


            //			// The table must be locked before the indices can be read into an accelerator array.
            //			ServerMarketData.AlgorithmTypeLock.AcquireReaderLock(Timeout.Infinite);
            this.Statements.Add(new CodeCommentStatement(@"The table must be locked before the indices can be read into an accelerator array."));
            this.Statements.Add(new CodeMethodInvokeExpression(new CodeTypeReferenceExpression(string.Format("{0}.{1}Lock", ExternalInterfaceSchema.DataSetName, middleTierTable.ElementTable.Name)), "AcquireReaderLock", new CodeExpression[] { new CodeFieldReferenceExpression(new CodeTypeReferenceExpression("System.Threading.Timeout"), "Infinite") }));

            // Get an accessor to the table schema information.  This makes accessing information about the table much faster as
            // it doesn't need to do the lock checking each time it references the table.
            //            // Accessor for the Algorithm Table.
            //            ServerMarketData.AlgorithmDataTable algorithmTable = ServerMarketData.Algorithm;
            this.Statements.Add(new CodeCommentStatement(string.Format("Accessor for the {0} Table.", middleTierTable.ElementTable.Name)));
            this.Statements.Add(new CodeVariableDeclarationStatement(new CodeTypeReference(string.Format("{0}.{1}DataTable", ExternalInterfaceSchema.DataSetName, middleTierTable.ElementTable.Name)), tableVariable, new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(ExternalInterfaceSchema.DataSetName), middleTierTable.ElementTable.Name)));

            // Indirect lookup operation using the external identifier to find a a row.
            //            // This does an indirect lookup operation using the views created for the ExternalId columns.  Take the index of the user
            //            // identifier column calcualted above and use it to find a record containing the external identifier.
            //            int externalIdIndex = GetExternalKeyIndex(configurationId, parameterId);
            //            DataView[] externalIdIndexArray = new DataView[] {
            //                    algorithmTable.UKAlgorithmExternalId0,
            //                    algorithmTable.UKAlgorithmExternalId1};
            //            DataRowView[] dataRowView = externalIdIndexArray[externalIdIndex].FindRows(new object[] {
            //                        externalId});
            this.Statements.Add(new CodeCommentStatement("This does an indirect lookup operation using the views created for the ExternalId columns.  Take the index of the user"));
            this.Statements.Add(new CodeCommentStatement("identifier column calcualted above and use it to find a record containing the external identifier."));
            CodeExpression[] userViewArray = new CodeExpression[this.middleTierTable.UniqueIndices.Length];
            for (int index = 0; index < this.middleTierTable.UniqueIndices.Length; index++)
            {
                userViewArray[index] = new CodeFieldReferenceExpression(new CodeVariableReferenceExpression(tableVariable), this.middleTierTable.UniqueIndices[index].Name);
            }
            this.Statements.Add(new CodeAssignStatement(new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(middleTierTable.ElementTable.Name), "externalKeyArray"), new CodeArrayCreateExpression("DataView", userViewArray)));

            //			// The table must be released after the array is constructed.
            //			ServerMarketData.AlgorithmTypeLock.AcquireReaderLock(Timeout.Infinite);
            this.Statements.Add(new CodeCommentStatement(@"The table must be released after the array is constructed."));
            this.Statements.Add(new CodeMethodInvokeExpression(new CodeTypeReferenceExpression(string.Format("{0}.{1}Lock", ExternalInterfaceSchema.DataSetName, middleTierTable.ElementTable.Name)), "ReleaseReaderLock"));
        }
Exemplo n.º 4
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 public Update(ExternalInterfaceSchema ExternalInterfaceSchema, MiddleTierTable middleTierTable) : base(ExternalInterfaceSchema, middleTierTable)
 {
     // The method may have different formats depending on the use of identity columns or the presense of a base class.
     if (!this.MiddleTierTable.IsIdentityClass)
     {
         UpdateWithoutIdentity();
     }
     else
     {
         if (this.MiddleTierTable.ElementBaseTable == null)
         {
             UpdateWithoutBase();
         }
         else
         {
             UpdateWithBase();
         }
     }
 }
Exemplo n.º 5
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        /// <summary>
        /// Creates a procedure that collects table locks needed for the 'Delete' operation.
        /// </summary>
        /// <param name="externalInterfaceClass"></param>
        public DeleteLock(ExternalInterfaceSchema ExternalInterfaceSchema, MiddleTierTable middleTierTable)
            : base(ExternalInterfaceSchema, middleTierTable)
        {
            // These are shorthand notations for values that are use often to construct the tables:
            string tableVariable = string.Format("{0}Table", this.MiddleTierTable.ElementTable.Name[0].ToString().ToLower() + this.MiddleTierTable.ElementTable.Name.Remove(0, 1));
            string rowVariable   = string.Format("{0}Row", this.MiddleTierTable.ElementTable.Name[0].ToString().ToLower() + this.MiddleTierTable.ElementTable.Name.Remove(0, 1));
            string tableTypeName = string.Format("{0}.{1}DataTable", this.ExternalInterfaceSchema.DataSetName, this.MiddleTierTable.ElementTable.Name);

            //        /// <summary>Collects the table lock request(s) for an 'Delete' operation</summary>
            //        /// <param name="requestLocks">A collection of table locks required for this operation.</param>
            //        public static void Delete(Transaction transaction)
            //        {
            this.Comments.Add(new CodeCommentStatement("<summary>Collects the table lock request(s) for an 'Delete' operation</summary>", true));
            this.Comments.Add(new CodeCommentStatement(@"<param name=""adoTransaction"">A collection of table locks required for this operation</param>", true));
            this.Attributes = MemberAttributes.Public | MemberAttributes.Final | MemberAttributes.Static;
            if (this.MiddleTierTable.ElementBaseTable != null)
            {
                this.Attributes |= MemberAttributes.New;
            }
            this.Name = "Delete";
            this.Parameters.Add(new CodeParameterDeclarationExpression("AdoTransaction", "adoTransaction"));

            //            // Call the internal methods to lock the tables required for an insert or update operation.
            //            Shadows.Web.Service.Equity.Insert(transaction);
            //            Shadows.Web.Service.Equity.Delete(transaction);
            this.Statements.Add(new CodeCommentStatement("Call the internal methods to lock the tables required for an insert or update operation."));
            this.Statements.Add(new CodeMethodInvokeExpression(new CodeTypeReferenceExpression(string.Format("{0}.{1}", this.ExternalInterfaceSchema.InternalNamespace, this.MiddleTierTable.ElementTable.Name)), "Delete", new CodeExpression[] { new CodeVariableReferenceExpression("adoTransaction") }));

            //            // These table lock(s) are required for the 'Delete' operation.
            //            transaction.Locks.AddReaderLock(ServerMarketData.ConfigurationLock);
            //            transaction.Locks.AddWriterLock(ServerMarketData.AlgorithmLock);
            //            transaction.Locks.AddReaderLock(ServerMarketData.AlgorithmTypeLock);
            this.Statements.Add(new CodeCommentStatement("These table lock(s) are required for the 'Delete' operation."));
            this.Statements.Add(new CodeMethodInvokeExpression(new CodeFieldReferenceExpression(new CodeArgumentReferenceExpression("adoTransaction"), "LockRequests"), "AddReaderLock", new CodeExpression[] { new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(this.ExternalInterfaceSchema.DataSetName), string.Format("{0}Lock", this.MiddleTierTable.ElementTable.Name)) }));
            if (this.MiddleTierTable.IsExternalIdClass)
            {
                this.Statements.Add(new CodeMethodInvokeExpression(new CodeFieldReferenceExpression(new CodeArgumentReferenceExpression("adoTransaction"), "LockRequests"), "AddReaderLock", new CodeExpression[] { new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(this.ExternalInterfaceSchema.DataSetName), "ConfigurationLock") }));
            }
        }
Exemplo n.º 6
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        static int Main(string[] args)
        {
            try
            {
                // Defaults
                ExternalInterfaceCompiler.targetNamespace   = string.Empty;
                ExternalInterfaceCompiler.internalNamespace = string.Empty;
                ExternalInterfaceCompiler.persistentStore   = string.Empty;
                ExternalInterfaceCompiler.dataSetName       = string.Empty;
                ExternalInterfaceCompiler.references        = new ArrayList();

                // The command line parser is driven by different states that are triggered by the flags read.  Unless a flag has
                // been read, the command line parser assumes that it's reading the file name from the command line.
                argumentState = ArgumentState.InputFileName;

                // Parse the command line for arguments.
                foreach (string argument in args)
                {
                    // Decode the current argument into a state change (or some other action).
                    switch (argument)
                    {
                    case "-ds": argumentState = ArgumentState.DataSetName; continue;

                    case "-i": argumentState = ArgumentState.InputFileName; continue;

                    case "-is": argumentState = ArgumentState.InternalNamespace; continue;

                    case "-ns": argumentState = ArgumentState.TargetNamespace; continue;

                    case "-out": argumentState = ArgumentState.OutputFileName; continue;

                    case "-ps": argumentState = ArgumentState.PersistentStore; continue;

                    case "-ref": argumentState = ArgumentState.Reference; continue;

                    case "-t": argumentState = ArgumentState.TargetTable; continue;
                    }

                    // The parsing state will determine which variable is read next.
                    switch (argumentState)
                    {
                    case ArgumentState.DataSetName: ExternalInterfaceCompiler.dataSetName = argument; break;

                    case ArgumentState.InputFileName: ExternalInterfaceCompiler.inputFileName = argument; break;

                    case ArgumentState.InternalNamespace: ExternalInterfaceCompiler.internalNamespace = argument; break;

                    case ArgumentState.OutputFileName: ExternalInterfaceCompiler.outputFileName = argument; break;

                    case ArgumentState.PersistentStore: ExternalInterfaceCompiler.persistentStore = argument; break;

                    case ArgumentState.Reference: ExternalInterfaceCompiler.references.Add(argument); break;

                    case ArgumentState.TargetNamespace: ExternalInterfaceCompiler.targetNamespace = argument; break;

                    case ArgumentState.TargetTable: ExternalInterfaceCompiler.targetTableName = argument; break;
                    }

                    // The default state is to look for the input file name on the command line.
                    argumentState = ArgumentState.InputFileName;
                }

                // Throw a usage message back at the user if no file name was given.
                if (inputFileName == null || targetNamespace == string.Empty)
                {
                    throw new Exception("Usage: Generator -i <input file name> -t <target table name>");
                }

                // If the name of the internal namespace MarkThree.MiddleTier to find the commands that use only internal identifiers) was
                // not specified on the command line, then try to infer it from the target namespace.
                if (internalNamespace == string.Empty)
                {
                    internalNamespace = targetNamespace.Replace(".External", string.Empty);
                }

                // If no output file name was specified, create one from the input file specification.
                if (outputFileName == null)
                {
                    outputFileName = string.Format("{0}.cs", Path.GetFileNameWithoutExtension(inputFileName));
                }

                StreamReader            streamReader            = new StreamReader(inputFileName);
                string                  inputContents           = streamReader.ReadToEnd();
                ExternalInterfaceSchema externalInterfaceSchema = new ExternalInterfaceSchema(inputContents);
                MiddleTierTable         middleTierTable         = new MiddleTierTable(externalInterfaceSchema, ExternalInterfaceCompiler.targetTableName);

                externalInterfaceSchema.InternalNamespace = ExternalInterfaceCompiler.internalNamespace;
                externalInterfaceSchema.TargetNamespace   = ExternalInterfaceCompiler.targetNamespace;
                externalInterfaceSchema.PersistentStore   = ExternalInterfaceCompiler.persistentStore;
                externalInterfaceSchema.DataSetName       = ExternalInterfaceCompiler.dataSetName;
                externalInterfaceSchema.References        = ExternalInterfaceCompiler.references;

                byte[] buffer = GenerateCode(externalInterfaceSchema, middleTierTable);

                FileStream outputStream = new FileStream(outputFileName, FileMode.OpenOrCreate, FileAccess.Write);
                outputStream.Write(buffer, 0, buffer.Length);
                outputStream.Close();
            }
            catch (Exception exception)
            {
                Console.WriteLine(exception.Message);
            }

            return(0);
        }
Exemplo n.º 7
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        /// <summary>
        /// Generate the code from the inputs.
        /// </summary>
        /// <param name="inputFileName">The name of the input file.</param>
        /// <param name="inputFileContent">The contents of the input file.</param>
        /// <returns>A buffer containing the generated code.</returns>
        protected static byte[] GenerateCode(ExternalInterfaceSchema ExternalInterfaceSchema, MiddleTierTable middleTierTable)
        {
            // Create a namespace MarkThree.MiddleTier add it to the module.  This namespace MarkThree.MiddleTier all the relavent code in it.
            CodeCompileUnit codeCompileUnit = new CodeCompileUnit();

            codeCompileUnit.Namespaces.Add(new ExternalInterfaceNamespace(ExternalInterfaceSchema, middleTierTable));

            // This will generate the code from the abstract compile unit and dump it in a memory stream.
            MemoryStream memoryStream = new MemoryStream();
            StreamWriter streamWriter = new StreamWriter(memoryStream, Encoding.UTF8);

            ExternalInterfaceCompiler.CodeProvider.GenerateCodeFromCompileUnit(codeCompileUnit, streamWriter,
                                                                               ExternalInterfaceCompiler.codeGeneratorOptions);
            streamWriter.Close();

            // Return the source code converted to a stream of bytes.
            return(memoryStream.GetBuffer());
        }
Exemplo n.º 8
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        /// <summary>
        /// Creates a procedure that collects table locks needed for the 'Update' operation.
        /// </summary>
        /// <param name="externalInterfaceClass"></param>
        public UpdateLock(ExternalInterfaceSchema ExternalInterfaceSchema, MiddleTierTable middleTierTable) : base(ExternalInterfaceSchema, middleTierTable)
        {
            // These are shorthand notations for values that are use often to construct the tables:
            string tableVariable = string.Format("{0}Table", this.MiddleTierTable.ElementTable.Name[0].ToString().ToLower() + this.MiddleTierTable.ElementTable.Name.Remove(0, 1));
            string rowVariable   = string.Format("{0}Row", this.MiddleTierTable.ElementTable.Name[0].ToString().ToLower() + this.MiddleTierTable.ElementTable.Name.Remove(0, 1));
            string tableTypeName = string.Format("{0}.{1}DataTable", this.ExternalInterfaceSchema.DataSetName, this.MiddleTierTable.ElementTable.Name);

            //        /// <summary>Collects the table lock request(s) for an 'Update' operation</summary>
            //        /// <param name="requestLocks">A collection of table locks required for this operation.</param>
            //        public static void Update(Transaction transaction)
            //        {
            this.Comments.Add(new CodeCommentStatement("<summary>Collects the table lock request(s) for an 'Update' operation</summary>", true));
            this.Comments.Add(new CodeCommentStatement(@"<param name=""adoTransaction"">A collection of table locks required for this operation</param>", true));
            this.Attributes = MemberAttributes.Public | MemberAttributes.Final | MemberAttributes.Static;
            if (this.MiddleTierTable.ElementBaseTable != null)
            {
                this.Attributes |= MemberAttributes.New;
            }
            this.Name = "Update";
            this.Parameters.Add(new CodeParameterDeclarationExpression("AdoTransaction", "adoTransaction"));

            //            // Call the internal methods to lock the tables required for an insert or update operation.
            //            Shadows.Web.Service.Equity.Insert(transaction);
            //            Shadows.Web.Service.Equity.Update(transaction);
            this.Statements.Add(new CodeCommentStatement("Call the internal methods to lock the tables required for an insert or update operation."));
            this.Statements.Add(new CodeMethodInvokeExpression(new CodeTypeReferenceExpression(string.Format("{0}.{1}", this.ExternalInterfaceSchema.InternalNamespace, this.MiddleTierTable.ElementTable.Name)), "Insert", new CodeExpression[] { new CodeVariableReferenceExpression("adoTransaction") }));
            this.Statements.Add(new CodeMethodInvokeExpression(new CodeTypeReferenceExpression(string.Format("{0}.{1}", this.ExternalInterfaceSchema.InternalNamespace, this.MiddleTierTable.ElementTable.Name)), "Update", new CodeExpression[] { new CodeVariableReferenceExpression("adoTransaction") }));

            //            // These table lock(s) are required for the 'Update' operation.
            //            transaction.Locks.AddReaderLock(ServerMarketData.ConfigurationLock);
            //            transaction.Locks.AddWriterLock(ServerMarketData.AlgorithmLock);
            //            transaction.Locks.AddReaderLock(ServerMarketData.AlgorithmTypeLock);
            this.Statements.Add(new CodeCommentStatement("These table lock(s) are required for the 'Update' operation."));
            this.Statements.Add(new CodeMethodInvokeExpression(new CodeFieldReferenceExpression(new CodeArgumentReferenceExpression("adoTransaction"), "LockRequests"), "AddReaderLock", new CodeExpression[] { new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(this.ExternalInterfaceSchema.DataSetName), string.Format("{0}Lock", this.MiddleTierTable.ElementTable.Name)) }));
            ArrayList arrayLock = new ArrayList();

            foreach (XmlSchemaKeyref keyrefParent in this.MiddleTierTable.KeyrefParents)
            {
                // Get the name of the parent table.
                XmlSchemaIdentityConstraint keyParent          = this.ExternalInterfaceSchema.FindKey(keyrefParent.Refer.Name);
                XmlSchemaElement            elementParentTable = this.ExternalInterfaceSchema.FindTable(this.ExternalInterfaceSchema.RemoveXPath(keyParent.Selector));
                // Collect the locks of all the parent tables.
                CollectTableLocks(arrayLock, elementParentTable);
            }
            // This will set a flag is the configuration table is needed to resolve external identifiers.
            bool needsCondigurationTable = this.MiddleTierTable.IsExternalIdClass;

            foreach (XmlSchemaElement elementParentTable in arrayLock)
            {
                if (this.ExternalInterfaceSchema.HasExternalIdColumn(elementParentTable))
                {
                    needsCondigurationTable = true;
                    break;
                }
            }
            if (needsCondigurationTable)
            {
                this.Statements.Add(new CodeMethodInvokeExpression(new CodeFieldReferenceExpression(new CodeArgumentReferenceExpression("adoTransaction"), "LockRequests"), "AddReaderLock", new CodeExpression[] { new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(this.ExternalInterfaceSchema.DataSetName), "ConfigurationLock") }));
            }
            foreach (XmlSchemaElement elementParentTable in arrayLock)
            {
                this.Statements.Add(new CodeMethodInvokeExpression(new CodeFieldReferenceExpression(new CodeArgumentReferenceExpression("adoTransaction"), "LockRequests"), "AddReaderLock", new CodeExpression[] { new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(this.ExternalInterfaceSchema.DataSetName), string.Format("{0}Lock", elementParentTable.Name)) }));
            }
        }
Exemplo n.º 9
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        /// <summary>
        /// Construct a CodeDOM that will find a record based on an external identifier and a configuration.
        /// </summary>
        public GetExternalKeyIndex(ExternalInterfaceSchema ExternalInterfaceSchema, MiddleTierTable middleTierTable) : base(ExternalInterfaceSchema, middleTierTable)
        {
            // These are shorthand notations for values that are use often to construct the tables:
            string tableVariable  = string.Format("{0}Table", this.MiddleTierTable.ElementTable.Name[0].ToString().ToLower() + this.MiddleTierTable.ElementTable.Name.Remove(0, 1));
            string primaryKeyName = this.ExternalInterfaceSchema.RemoveXPath(this.MiddleTierTable.PrimaryKey.Fields[0]);

            // Method Header:
            //        /// <summary>Finds a a Algorithm record using a configuration and an external identifier.</summary>
            //        /// <param name="configurationId">Specified which mappings (user id columns) to use when looking up external identifiers.</param>
            //        /// <param name="externalId">The external (user supplied) identifier for the record.</param>
            //        public static int GetExternalKeyIndex(string configurationId, string parameterId, string externalId)
            //        {


            // Method Header:
            ///       /// <summary>Calculates which index to uses when searching for external identifiers.</summary>
            ///       /// <param name="configurationId">Specified which mappings (user id columns) to use when looking up external identifiers.</param>
            ///       /// <param name="parameterId">The name of the parameter as specified in the configuration table.</param>
            ///       /// <returns>An index into the array of keys to search for an external identifier.</returns>
            this.Comments.Add(new CodeCommentStatement(@"<summary>Calculates which index to uses when searching for external identifiers.</summary>", true));
            this.Comments.Add(new CodeCommentStatement(@"<param name=""configurationId"">Specified which mappings (user id columns) to use when looking up external identifiers.</param>", true));
            this.Comments.Add(new CodeCommentStatement(@"<param name=""parameterId"">The name of the parameter as specified in the configuration table.</param>", true));
            this.Comments.Add(new CodeCommentStatement(@"<returns>An index into the array of keys to search for an external identifier.</returns>", true));
            this.Attributes = MemberAttributes.Public | MemberAttributes.Final | MemberAttributes.Static;
            this.ReturnType = new CodeTypeReference(typeof(int));
            this.Name       = "GetExternalKeyIndex";
            this.Parameters.Add(new CodeParameterDeclarationExpression(typeof(object), "configurationId"));
            this.Parameters.Add(new CodeParameterDeclarationExpression(typeof(string), "parameterId"));

            // Translate the configuration identifier into an index into the user Id columns:
            //            // Translate the configurationId and the predefined parameter name into an index into the array of user ids.  The index
            //            // is where we expect to find the identifier.  That is, an index of 1 will guide the lookup logic to use the external
            //            // identifiers found in the 'ExternalId1' column.
            //            ServerMarketData.ConfigurationRow configurationRow = ServerMarketData.Configuration.FindByConfigurationIdParameterId(configurationId, "AlgorithmId");
            //            int externalKeyIndex = 0;
            //            if ((configurationRow != null))
            //            {
            //                externalKeyIndex = configurationRow.Index;
            //            }
            this.Statements.Add(new CodeCommentStatement("Translate the configurationId and the predefined parameter name into an index into the array of user ids.  The index"));
            this.Statements.Add(new CodeCommentStatement("is where we expect to find the identifier.  That is, an index of 1 will guide the lookup logic to use the external"));
            this.Statements.Add(new CodeCommentStatement("identifiers found in the 'ExternalId1' column."));
            this.Statements.Add(new CodeVariableDeclarationStatement(typeof(int), "externalKeyIndex", new CodePrimitiveExpression(0)));
            CodeStatementCollection trueStatements = new CodeStatementCollection();

            trueStatements.Add(new CodeCommentStatement("Attempt to find a external column specification for the given configuration and parameter.  This record tells us"));
            trueStatements.Add(new CodeCommentStatement("which column to use in the array of external columns."));
            trueStatements.Add(new CodeVariableDeclarationStatement(string.Format("{0}.ConfigurationRow", this.ExternalInterfaceSchema.DataSetName), "configurationRow", new CodeMethodInvokeExpression(new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(this.ExternalInterfaceSchema.DataSetName), "Configuration"), "FindByConfigurationIdParameterId", new CodeExpression[] { new CodeCastExpression(typeof(string), new CodeArgumentReferenceExpression("configurationId")), new CodeArgumentReferenceExpression("parameterId") })));
            CodeExpression[] exceptionVariables = new CodeExpression[] { new CodePrimitiveExpression(@"The parameter {1} isn't defined for configuration '{0}'"), new CodeArgumentReferenceExpression("configurationId"), new CodeArgumentReferenceExpression("parameterId") };
            CodeStatement    externalKeyIndex   = new CodeAssignStatement(new CodeVariableReferenceExpression("externalKeyIndex"), new CodeFieldReferenceExpression(new CodeVariableReferenceExpression("configurationRow"), "ColumnIndex"));

            trueStatements.Add(new CodeConditionStatement(new CodeBinaryOperatorExpression(new CodeVariableReferenceExpression("configurationRow"), CodeBinaryOperatorType.IdentityInequality, new CodePrimitiveExpression(null)), externalKeyIndex));
            CodeStatement[] trueStatementBlock = new CodeStatement[trueStatements.Count];
            trueStatements.CopyTo(trueStatementBlock, 0);
            this.Statements.Add(new CodeConditionStatement(new CodeBinaryOperatorExpression(new CodeArgumentReferenceExpression("configurationId"), CodeBinaryOperatorType.IdentityInequality, new CodePrimitiveExpression(null)), trueStatementBlock));

            //            // This is the index into the array of keys to be used when searching for an external identifier.
            //            return externalKeyIndex;
            this.Statements.Add(new CodeCommentStatement("This is the index into the array of keys to be used when searching for an external identifier."));
            this.Statements.Add(new CodeMethodReturnStatement(new CodeVariableReferenceExpression("externalKeyIndex")));
        }
Exemplo n.º 10
0
 public ExternalInterfaceMethod(ExternalInterfaceSchema ExternalInterfaceSchema, MiddleTierTable middleTierTable)
 {
     // Initialize the object
     this.externalInterfaceSchema = ExternalInterfaceSchema;
     this.middleTierTable         = middleTierTable;
 }
Exemplo n.º 11
0
        /// <summary>
        /// Construct a CodeDOM that will find a record based on an external identifier and a configuration.
        /// </summary>
        public FindKey(ExternalInterfaceSchema ExternalInterfaceSchema, MiddleTierTable middleTierTable)
            : base(ExternalInterfaceSchema, middleTierTable)
        {
            // These are shorthand notations for values that are use often to construct the tables:
            string tableVariable  = string.Format("{0}Table", this.MiddleTierTable.ElementTable.Name[0].ToString().ToLower() + this.MiddleTierTable.ElementTable.Name.Remove(0, 1));
            string primaryKeyName = this.ExternalInterfaceSchema.RemoveXPath(this.MiddleTierTable.PrimaryKey.Fields[0]);

            // Find the primary column element.
            XmlSchemaElement primaryColumnElement = null;

            foreach (XmlSchemaElement xmlSchemaElement in this.MiddleTierTable.ElementColumns)
            {
                if (xmlSchemaElement.Name == this.ExternalInterfaceSchema.RemoveXPath(this.MiddleTierTable.PrimaryKey.Fields[0]))
                {
                    primaryColumnElement = xmlSchemaElement;
                }
            }

            // Method Header:
            //        /// <summary>Finds a a Algorithm record using a configuration and an external identifier.</summary>
            //        /// <param name="configurationId">Specified which mappings (user id columns) to use when looking up external identifiers.</param>
            //        /// <param name="externalId">The external (user supplied) identifier for the record.</param>
            //        public static int FindKey(string configurationId, string parameterId, string externalId)
            //        {
            Type returnType = ((XmlSchemaDatatype)primaryColumnElement.ElementType).ValueType;

            this.Comments.Add(new CodeCommentStatement(string.Format("<summary>Finds a a {0} record using a configuration and an external identifier.</summary>", this.MiddleTierTable.ElementTable.Name), true));
            this.Comments.Add(new CodeCommentStatement(@"<param name=""configurationId"">Specified which mappings (user id columns) to use when looking up external identifiers.</param>", true));
            this.Comments.Add(new CodeCommentStatement(@"<param name=""parameterId"">The name of the parameter as specified in the configuration table.</param>", true));
            this.Comments.Add(new CodeCommentStatement(@"<param name=""externalId"">The external (user supplied) identifier for the record.</param>", true));
            this.Attributes = MemberAttributes.Public | MemberAttributes.Final | MemberAttributes.Static;
            this.ReturnType = new CodeTypeReference(returnType);
            this.Name       = "FindKey";
            this.Parameters.Add(new CodeParameterDeclarationExpression(typeof(object), "configurationId"));
            this.Parameters.Add(new CodeParameterDeclarationExpression(typeof(string), "parameterId"));
            this.Parameters.Add(new CodeParameterDeclarationExpression(typeof(object), "externalId"));

            // This calculates the return value when there is no match.
            CodeExpression returnValue = returnType == typeof(int) ?
                                         new CodePropertyReferenceExpression(new CodeTypeReferenceExpression(typeof(int)), "MinValue") :
                                         new CodePropertyReferenceExpression(new CodeTypeReferenceExpression(typeof(string)), "Empty");

            //			// A missing key will never match a column.
            //			if ((externalId == null))
            //			{
            //				return;
            //			}
            this.Statements.Add(new CodeCommentStatement("A missing key will never match a column."));
            this.Statements.Add(new CodeConditionStatement(new CodeBinaryOperatorExpression(new CodeArgumentReferenceExpression("externalId"), CodeBinaryOperatorType.IdentityEquality, new CodePrimitiveExpression(null)), new CodeStatement[] { new CodeMethodReturnStatement(returnValue) }));

            // Get an accessor to the table schema information.  This makes accessing information about the table much faster as
            // it doesn't need to do the lock checking each time it references the table.
            //            // Accessor for the Algorithm Table.
            //            ServerMarketData.AlgorithmDataTable algorithmTable = ServerMarketData.Algorithm;
            this.Statements.Add(new CodeCommentStatement(string.Format("Accessor for the {0} Table.", this.MiddleTierTable.ElementTable.Name)));
            this.Statements.Add(new CodeVariableDeclarationStatement(new CodeTypeReference(string.Format("{0}.{1}DataTable", this.ExternalInterfaceSchema.DataSetName, this.MiddleTierTable.ElementTable.Name)), tableVariable, new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(this.ExternalInterfaceSchema.DataSetName), this.MiddleTierTable.ElementTable.Name)));

            //			int externalKeyIndex = GetExternalKeyIndex(configurationId, parameterId);
            //			DataView externalKeyView = externalKeyArray[externalKeyIndex];
            //			int recordIndex = externalKeyView.Find(new object[] {externalId});
            //			if (recordIndex == -1)
            //				return -1;
            //			return ((int)(externalIndexView[recordIndex].Row[objectTable.ObjectIdColumn]));
            this.Statements.Add(new CodeCommentStatement(@"Look for the record using the external identifier.  The configuration selected the key to use, which effectively"));
            this.Statements.Add(new CodeCommentStatement(@"selected the external id column to use for the search.  If a record is found in the view, a translation still needs"));
            this.Statements.Add(new CodeCommentStatement(@"to be made back to the original table before an index to the record can be returned to the caller."));
            this.Statements.Add(new CodeVariableDeclarationStatement(typeof(int), "externalKeyIndex", new CodeMethodInvokeExpression(new CodeTypeReferenceExpression(this.MiddleTierTable.ElementTable.Name), "GetExternalKeyIndex", new CodeExpression[] { new CodeArgumentReferenceExpression("configurationId"), new CodeArgumentReferenceExpression("parameterId") })));
            this.Statements.Add(new CodeVariableDeclarationStatement(typeof(System.Data.DataView), "externalKeyView", new CodeArrayIndexerExpression(new CodeFieldReferenceExpression(new CodeTypeReferenceExpression(this.MiddleTierTable.ElementTable.Name), "externalKeyArray"), new CodeExpression[] { new CodeVariableReferenceExpression("externalKeyIndex") })));
            this.Statements.Add(new CodeVariableDeclarationStatement(typeof(int), "recordIndex", new CodeMethodInvokeExpression(new CodeVariableReferenceExpression("externalKeyView"), "Find", new CodeExpression[] { new CodeArrayCreateExpression(typeof(object), new CodeExpression[] { new CodeArgumentReferenceExpression("externalId") }) })));
            this.Statements.Add(new CodeConditionStatement(new CodeBinaryOperatorExpression(new CodeVariableReferenceExpression("recordIndex"), CodeBinaryOperatorType.IdentityEquality, new CodePrimitiveExpression(-1)), new CodeMethodReturnStatement(returnValue)));
            this.Statements.Add(new CodeMethodReturnStatement(new CodeCastExpression(returnType, new CodeArrayIndexerExpression(new CodeFieldReferenceExpression(new CodeArrayIndexerExpression(new CodeVariableReferenceExpression("externalKeyView"), new CodeExpression[] { new CodeVariableReferenceExpression("recordIndex") }), "Row"), new CodeExpression[] { new CodeFieldReferenceExpression(new CodeVariableReferenceExpression(tableVariable), string.Format("{0}Column", primaryKeyName)) }))));
        }
Exemplo n.º 12
0
        public ExternalInterfaceClass(ExternalInterfaceSchema ExternalInterfaceSchema, MiddleTierTable middleTierTable)
        {
            // Initialize the object
            this.ExternalInterfaceSchema = ExternalInterfaceSchema;
            this.middleTierTable         = middleTierTable;

            // Find out if the class has external identifiers or has a parent table that uses external identifiers.  The external
            // interface methods are only meaningful for resolving these external identifiers.
            bool isExternalInterfaceNeeded = middleTierTable.IsExternalIdClass || this.middleTierTable.ElementTable.Name == "Configuration";

            foreach (XmlSchemaKeyref keyrefParent in middleTierTable.KeyrefParents)
            {
                XmlSchemaIdentityConstraint keyParent     = ExternalInterfaceSchema.FindKey(keyrefParent.Refer.Name);
                XmlSchemaElement            elementParent = ExternalInterfaceSchema.FindTable(ExternalInterfaceSchema.RemoveXPath(keyParent.Selector));
                if (this.ExternalInterfaceSchema.HasExternalIdColumn(elementParent))
                {
                    isExternalInterfaceNeeded = true;
                }
            }

            // Construct the header for an inherited and independent class.
            if (middleTierTable.ElementBaseTable == null)
            {
                ExternalInterfaceClassWithoutBase();
            }
            else
            {
                ExternalInterfaceClassWithBase();
            }

            // The base classes need to define a persistent data store and gain a reference to the static, in-memory
            // data model.  Inheritied classes don't need to be bothered because the base class has already defined these
            // resources.
            if (this.middleTierTable.ElementBaseTable == null)
            {
                // This field is a string which accesses the persistent memory store parameters from the configuration file.
                this.Members.Add(new PersistentStore(this.ExternalInterfaceSchema));

                // This field provides access to the in-memory data model.
                this.Members.Add(new AdoDatabase(this.ExternalInterfaceSchema));
            }

            // Optional Methods for finding a record based on an external identifier.
            if (middleTierTable.IsExternalIdClass && this.middleTierTable.ElementBaseTable == null)
            {
                this.Members.Add(new ExternalKeyArray(ExternalInterfaceSchema));
                this.Members.Add(new StaticConstructor(ExternalInterfaceSchema, middleTierTable));
                this.Members.Add(new GetExternalKeyIndex(ExternalInterfaceSchema, middleTierTable));
                this.Members.Add(new FindKey(ExternalInterfaceSchema, middleTierTable));
                this.Members.Add(new FindRequiredKey(ExternalInterfaceSchema, middleTierTable));
                this.Members.Add(new FindOptionalKey(ExternalInterfaceSchema, middleTierTable));
            }

            // Lock and Load
            this.Members.Add(new LoadLock(ExternalInterfaceSchema, middleTierTable));
            this.Members.Add(new Load(ExternalInterfaceSchema, middleTierTable));

            // If a table consists only of primary key elements (such as a mapping table), an update operation is undefined.  That is,
            // there are no columns to update.
            if (middleTierTable.NonPrimaryKeyColumns != 0)
            {
                this.Members.Add(new UpdateLock(ExternalInterfaceSchema, middleTierTable));
                this.Members.Add(new Update(ExternalInterfaceSchema, middleTierTable));
            }

            // Delete and Archive Methods
            this.Members.Add(new DeleteLock(ExternalInterfaceSchema, middleTierTable));
            this.Members.Add(new Delete(ExternalInterfaceSchema, middleTierTable));
            this.Members.Add(new ArchiveLock(ExternalInterfaceSchema, middleTierTable));
            this.Members.Add(new Archive(ExternalInterfaceSchema, middleTierTable));
        }