239 lines
12 KiB
C#
239 lines
12 KiB
C#
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Data;
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using System.Data.Linq;
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using System.Data.Common;
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using System.Linq.Expressions;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Transactions;
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using System.Reflection;
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using System.Diagnostics.CodeAnalysis;
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namespace System.Data.Linq.Provider {
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/// <summary>
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/// A data provider implements this interface to hook into the LINQ to SQL framework.
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/// </summary>
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internal interface IProvider : IDisposable {
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/// <summary>
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/// Initializes the database provider with the data services object and connection.
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/// </summary>
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/// <param name="dataServices"></param>
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/// <param name="connection">A connection string, connection object or transaction object
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/// used to seed the provider with database connection information.</param>
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void Initialize(IDataServices dataServices, object connection);
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/// <summary>
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/// The text writer used by the provider to output information such as query and commands
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/// being executed.
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/// </summary>
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TextWriter Log { get; set; }
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/// <summary>
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/// The connection object used by the provider when executing queries and commands.
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/// </summary>
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DbConnection Connection { get; }
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/// <summary>
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/// The transaction object used by the provider when executing queries and commands.
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/// </summary>
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DbTransaction Transaction { get; set; }
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/// <summary>
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/// The command timeout setting to use for command execution.
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/// </summary>
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int CommandTimeout { get; set; }
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/// <summary>
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/// Clears the connection of any current activity.
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/// </summary>
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void ClearConnection();
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/// <summary>
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/// Creates a new database instance (catalog or file) at the location specified by the connection
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/// using the metadata encoded within the entities or mapping file.
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/// </summary>
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void CreateDatabase();
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/// <summary>
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/// Deletes the database instance at the location specified by the connection.
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/// </summary>
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void DeleteDatabase();
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/// <summary>
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/// Returns true if the database specified by the connection object exists.
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/// </summary>
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/// <returns></returns>
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bool DatabaseExists();
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/// <summary>
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/// Executes the query specified as a LINQ expression tree.
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/// </summary>
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/// <param name="query"></param>
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/// <returns>A result object from which you can obtain the return value and output parameters.</returns>
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IExecuteResult Execute(Expression query);
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/// <summary>
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/// Compiles the query specified as a LINQ expression tree.
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/// </summary>
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/// <param name="query"></param>
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/// <returns>A compiled query instance.</returns>
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ICompiledQuery Compile(Expression query);
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/// <summary>
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/// Translates a DbDataReader into a sequence of objects (entity or projection) by mapping
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/// columns of the data reader to object members by name.
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/// </summary>
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/// <param name="elementType">The type of the resulting objects.</param>
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/// <param name="reader"></param>
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/// <returns></returns>
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IEnumerable Translate(Type elementType, DbDataReader reader);
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/// <summary>
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/// Translates an IDataReader containing multiple result sets into sequences of objects
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/// (entity or projection) by mapping columns of the data reader to object members by name.
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/// </summary>
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/// <param name="reader"></param>
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/// <returns></returns>
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IMultipleResults Translate(DbDataReader reader);
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/// <summary>
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/// Returns the query text in the database server's native query language
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/// that would need to be executed to perform the specified query.
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/// </summary>
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/// <param name="query">The query</param>
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/// <returns></returns>
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string GetQueryText(Expression query);
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/// <summary>
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/// Return an IDbCommand object representing the translation of specified query.
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/// </summary>
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/// <param name="query"></param>
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/// <returns></returns>
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DbCommand GetCommand(Expression query);
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}
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/// <summary>
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/// A compiled query.
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/// </summary>
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internal interface ICompiledQuery {
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/// <summary>
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/// Executes the compiled query using the specified provider and a set of arguments.
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/// </summary>
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/// <param name="provider">The provider that will execute the compiled query.</param>
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/// <param name="arguments">Argument values to supply to the parameters of the compiled query,
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/// when the query is specified as a LambdaExpression.</param>
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/// <returns></returns>
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IExecuteResult Execute(IProvider provider, object[] arguments);
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}
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internal static class DataManipulation {
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/// <summary>
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/// The method signature used to encode an Insert command.
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/// The method will throw a NotImplementedException if called directly.
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <typeparam name="TResult"></typeparam>
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/// <param name="item"></param>
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/// <param name="resultSelector"></param>
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/// <returns></returns>
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "item", Justification = "[....]: The method is being used to represent a method signature")]
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "resultSelector", Justification = "[....]: The method is being used to represent a method signature")]
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public static TResult Insert<TEntity, TResult>(TEntity item, Func<TEntity, TResult> resultSelector) {
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throw new NotImplementedException();
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}
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/// <summary>
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/// The method signature used to encode an Insert command.
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/// The method will throw a NotImplementedException if called directly.
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <param name="item"></param>
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/// <returns></returns>
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "item", Justification = "[....]: The method is being used to represent a method signature")]
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public static int Insert<TEntity>(TEntity item) {
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throw new NotImplementedException();
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}
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/// <summary>
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/// The method signature used to encode an Update command.
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/// The method will throw a NotImplementedException if called directly.
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <typeparam name="TResult"></typeparam>
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/// <param name="item"></param>
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/// <param name="check"></param>
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/// <param name="resultSelector"></param>
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/// <returns></returns>
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "item", Justification = "[....]: The method is being used to represent a method signature")]
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "check", Justification = "[....]: The method is being used to represent a method signature")]
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "resultSelector", Justification = "[....]: The method is being used to represent a method signature")]
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public static TResult Update<TEntity, TResult>(TEntity item, Func<TEntity, bool> check, Func<TEntity, TResult> resultSelector) {
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throw new NotImplementedException();
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}
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/// <summary>
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/// The method signature used to encode an Update command.
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/// The method will throw a NotImplementedException if called directly.
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <typeparam name="TResult"></typeparam>
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/// <param name="item"></param>
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/// <param name="resultSelector"></param>
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/// <returns></returns>
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "item", Justification = "[....]: The method is being used to represent a method signature")]
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "resultSelector", Justification = "[....]: The method is being used to represent a method signature")]
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public static TResult Update<TEntity, TResult>(TEntity item, Func<TEntity, TResult> resultSelector) {
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throw new NotImplementedException();
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}
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/// <summary>
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/// The method signature used to encode an Update command.
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/// The method will throw a NotImplementedException if called directly.
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <param name="item"></param>
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/// <param name="check"></param>
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/// <returns></returns>
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "item", Justification = "[....]: The method is being used to represent a method signature")]
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "check", Justification = "[....]: The method is being used to represent a method signature")]
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public static int Update<TEntity>(TEntity item, Func<TEntity, bool> check) {
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throw new NotImplementedException();
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}
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/// <summary>
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/// The method signature used to encode an Update command.
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/// The method will throw a NotImplementedException if called directly.
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <param name="item"></param>
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/// <returns></returns>
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "item", Justification = "[....]: The method is being used to represent a method signature")]
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public static int Update<TEntity>(TEntity item) {
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throw new NotImplementedException();
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}
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/// <summary>
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/// The method signature used to encode a Delete command.
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/// The method will throw a NotImplementedException if called directly.
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <param name="item"></param>
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/// <param name="check"></param>
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/// <returns></returns>
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "item", Justification = "[....]: The method is being used to represent a method signature")]
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "check", Justification = "[....]: The method is being used to represent a method signature")]
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public static int Delete<TEntity>(TEntity item, Func<TEntity, bool> check) {
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throw new NotImplementedException();
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}
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/// <summary>
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/// The method signature used to encode a Delete command.
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/// The method will throw a NotImplementedException if called directly.
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <param name="item"></param>
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/// <returns></returns>
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[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "item", Justification = "[....]: The method is being used to represent a method signature")]
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public static int Delete<TEntity>(TEntity item) {
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throw new NotImplementedException();
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}
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}
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}
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