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1451 lines (1337 loc) · 55.2 KB
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//
// Copyright (c) 2012-2017 Krueger Systems, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Threading;
using System.Threading.Tasks;
#pragma warning disable CA1001 // Types that own disposable fields should be disposable
#pragma warning disable CA1200 // Avoid using cref tags with a prefix
#pragma warning disable CA1720 // Identifier contains type name
namespace SQLite
{
/// <summary>
/// A pooled asynchronous connection to a SQLite database.
/// </summary>
public partial class SQLiteAsyncConnection
{
SQLiteConnectionString _connectionString;
SQLiteConnectionWithLock _fullMutexReadConnection;
readonly bool isFullMutex;
SQLiteOpenFlags _openFlags;
/// <summary>
/// Constructs a new SQLiteAsyncConnection and opens a pooled SQLite database specified by databasePath.
/// </summary>
/// <param name="databasePath">
/// Specifies the path to the database file.
/// </param>
/// <param name="storeDateTimeAsTicks">
/// Specifies whether to store DateTime properties as ticks (true) or strings (false). You
/// absolutely do want to store them as Ticks in all new projects. The value of false is
/// only here for backwards compatibility. There is a *significant* speed advantage, with no
/// down sides, when setting storeDateTimeAsTicks = true.
/// If you use DateTimeOffset properties, it will be always stored as ticks regardingless
/// the storeDateTimeAsTicks parameter.
/// </param>
/// <param name="key">
/// Specifies the encryption key to use on the database. Should be a string or a byte[].
/// </param>
public SQLiteAsyncConnection(string databasePath, bool storeDateTimeAsTicks = true, object key = null)
: this(databasePath, SQLiteOpenFlags.FullMutex | SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create, storeDateTimeAsTicks, key: key)
{
}
/// <summary>
/// Constructs a new SQLiteAsyncConnection and opens a pooled SQLite database specified by databasePath.
/// </summary>
/// <param name="databasePath">
/// Specifies the path to the database file.
/// </param>
/// <param name="openFlags">
/// Flags controlling how the connection should be opened.
/// </param>
/// <param name="storeDateTimeAsTicks">
/// Specifies whether to store DateTime properties as ticks (true) or strings (false). You
/// absolutely do want to store them as Ticks in all new projects. The value of false is
/// only here for backwards compatibility. There is a *significant* speed advantage, with no
/// down sides, when setting storeDateTimeAsTicks = true.
/// If you use DateTimeOffset properties, it will be always stored as ticks regardingless
/// the storeDateTimeAsTicks parameter.
/// </param>
/// <param name="key">
/// Specifies the encryption key to use on the database. Should be a string or a byte[].
/// </param>
public SQLiteAsyncConnection(string databasePath, SQLiteOpenFlags openFlags, bool storeDateTimeAsTicks = true, object key = null)
{
_openFlags = openFlags;
isFullMutex = _openFlags.HasFlag(SQLiteOpenFlags.FullMutex);
_connectionString = new SQLiteConnectionString(databasePath, storeDateTimeAsTicks, key);
if (isFullMutex)
_fullMutexReadConnection = new SQLiteConnectionWithLock(_connectionString, openFlags) { SkipLock = true };
}
/// <summary>
/// Gets the database path used by this connection.
/// </summary>
public string DatabasePath => GetConnection().DatabasePath;
/// <summary>
/// Gets the SQLite library version number. 3007014 would be v3.7.14
/// </summary>
public int LibVersionNumber => GetConnection().LibVersionNumber;
/// <summary>
/// The amount of time to wait for a table to become unlocked.
/// </summary>
public TimeSpan GetBusyTimeout()
{
return GetConnection().BusyTimeout;
}
/// <summary>
/// Sets the amount of time to wait for a table to become unlocked.
/// </summary>
public Task SetBusyTimeoutAsync(TimeSpan value)
{
return ReadAsync<object>(conn => {
conn.BusyTimeout = value;
return null;
});
}
/// <summary>
/// Whether to store DateTime properties as ticks (true) or strings (false).
/// </summary>
public bool StoreDateTimeAsTicks => GetConnection().StoreDateTimeAsTicks;
/// <summary>
/// Whether to writer queries to <see cref="Tracer"/> during execution.
/// </summary>
/// <value>The tracer.</value>
public bool Trace
{
get { return GetConnection().Trace; }
set { GetConnection().Trace = value; }
}
/// <summary>
/// The delegate responsible for writing trace lines.
/// </summary>
/// <value>The tracer.</value>
public Action<string> Tracer
{
get { return GetConnection().Tracer; }
set { GetConnection().Tracer = value; }
}
/// <summary>
/// Whether Trace lines should be written that show the execution time of queries.
/// </summary>
public bool TimeExecution
{
get { return GetConnection().TimeExecution; }
set { GetConnection().TimeExecution = value; }
}
/// <summary>
/// Returns the mappings from types to tables that the connection
/// currently understands.
/// </summary>
public IEnumerable<TableMapping> TableMappings => GetConnection().TableMappings;
/// <summary>
/// Closes all connections to all async databases.
/// You should *never* need to do this.
/// This is a blocking operation that will return when all connections
/// have been closed.
/// </summary>
public static void ResetPool()
{
SQLiteConnectionPool.Shared.Reset();
}
/// <summary>
/// Gets the pooled lockable connection used by this async connection.
/// You should never need to use this. This is provided only to add additional
/// functionality to SQLite-net. If you use this connection, you must use
/// the Lock method on it while using it.
/// </summary>
public SQLiteConnectionWithLock GetConnection()
{
return SQLiteConnectionPool.Shared.GetConnection(_connectionString, _openFlags);
}
/// <summary>
/// Closes any pooled connections used by the database.
/// </summary>
public Task CloseAsync()
{
return Task.Factory.StartNew(() => {
SQLiteConnectionPool.Shared.CloseConnection(_connectionString, _openFlags);
}, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
}
Task<T> ReadAsync<T>(Func<SQLiteConnectionWithLock, T> read)
{
return Task.Factory.StartNew(() => {
var conn = isFullMutex ? _fullMutexReadConnection : GetConnection();
using (conn.Lock())
{
return read(conn);
}
}, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
}
Task<T> WriteAsync<T>(Func<SQLiteConnectionWithLock, T> write)
{
return Task.Factory.StartNew(() => {
var conn = GetConnection();
using (conn.Lock())
{
return write(conn);
}
}, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default);
}
/// <summary>
/// Enable or disable extension loading.
/// </summary>
public Task EnableLoadExtensionAsync(bool enabled)
{
return WriteAsync<object>(conn => {
conn.EnableLoadExtension(enabled);
return null;
});
}
/// <summary>
/// Executes a "create table if not exists" on the database. It also
/// creates any specified indexes on the columns of the table. It uses
/// a schema automatically generated from the specified type. You can
/// later access this schema by calling GetMapping.
/// </summary>
/// <returns>
/// Whether the table was created or migrated.
/// </returns>
public Task<CreateTableResult> CreateTableAsync<T>(CreateFlags createFlags = CreateFlags.None)
where T : new()
{
return WriteAsync(conn => conn.CreateTable<T>(createFlags));
}
/// <summary>
/// Executes a "create table if not exists" on the database. It also
/// creates any specified indexes on the columns of the table. It uses
/// a schema automatically generated from the specified type. You can
/// later access this schema by calling GetMapping.
/// </summary>
/// <param name="ty">Type to reflect to a database table.</param>
/// <param name="createFlags">Optional flags allowing implicit PK and indexes based on naming conventions.</param>
/// <returns>
/// Whether the table was created or migrated.
/// </returns>
public Task<CreateTableResult> CreateTableAsync(Type ty, CreateFlags createFlags = CreateFlags.None)
{
return WriteAsync(conn => conn.CreateTable(ty, createFlags));
}
/// <summary>
/// Executes a "create table if not exists" on the database for each type. It also
/// creates any specified indexes on the columns of the table. It uses
/// a schema automatically generated from the specified type. You can
/// later access this schema by calling GetMapping.
/// </summary>
/// <returns>
/// Whether the table was created or migrated for each type.
/// </returns>
public Task<CreateTablesResult> CreateTablesAsync<T, T2>(CreateFlags createFlags = CreateFlags.None)
where T : new()
where T2 : new()
{
return CreateTablesAsync(createFlags, typeof(T), typeof(T2));
}
/// <summary>
/// Executes a "create table if not exists" on the database for each type. It also
/// creates any specified indexes on the columns of the table. It uses
/// a schema automatically generated from the specified type. You can
/// later access this schema by calling GetMapping.
/// </summary>
/// <returns>
/// Whether the table was created or migrated for each type.
/// </returns>
public Task<CreateTablesResult> CreateTablesAsync<T, T2, T3>(CreateFlags createFlags = CreateFlags.None)
where T : new()
where T2 : new()
where T3 : new()
{
return CreateTablesAsync(createFlags, typeof(T), typeof(T2), typeof(T3));
}
/// <summary>
/// Executes a "create table if not exists" on the database for each type. It also
/// creates any specified indexes on the columns of the table. It uses
/// a schema automatically generated from the specified type. You can
/// later access this schema by calling GetMapping.
/// </summary>
/// <returns>
/// Whether the table was created or migrated for each type.
/// </returns>
public Task<CreateTablesResult> CreateTablesAsync<T, T2, T3, T4>(CreateFlags createFlags = CreateFlags.None)
where T : new()
where T2 : new()
where T3 : new()
where T4 : new()
{
return CreateTablesAsync(createFlags, typeof(T), typeof(T2), typeof(T3), typeof(T4));
}
/// <summary>
/// Executes a "create table if not exists" on the database for each type. It also
/// creates any specified indexes on the columns of the table. It uses
/// a schema automatically generated from the specified type. You can
/// later access this schema by calling GetMapping.
/// </summary>
/// <returns>
/// Whether the table was created or migrated for each type.
/// </returns>
public Task<CreateTablesResult> CreateTablesAsync<T, T2, T3, T4, T5>(CreateFlags createFlags = CreateFlags.None)
where T : new()
where T2 : new()
where T3 : new()
where T4 : new()
where T5 : new()
{
return CreateTablesAsync(createFlags, typeof(T), typeof(T2), typeof(T3), typeof(T4), typeof(T5));
}
/// <summary>
/// Executes a "create table if not exists" on the database for each type. It also
/// creates any specified indexes on the columns of the table. It uses
/// a schema automatically generated from the specified type. You can
/// later access this schema by calling GetMapping.
/// </summary>
/// <returns>
/// Whether the table was created or migrated for each type.
/// </returns>
public Task<CreateTablesResult> CreateTablesAsync(CreateFlags createFlags = CreateFlags.None, params Type[] types)
{
return WriteAsync(conn => conn.CreateTables(createFlags, types));
}
/// <summary>
/// Executes a "drop table" on the database. This is non-recoverable.
/// </summary>
public Task<int> DropTableAsync<T>()
where T : new()
{
return WriteAsync(conn => conn.DropTable<T>());
}
/// <summary>
/// Executes a "drop table" on the database. This is non-recoverable.
/// </summary>
/// <param name="map">
/// The TableMapping used to identify the table.
/// </param>
public Task<int> DropTableAsync(TableMapping map)
{
return WriteAsync(conn => conn.DropTable(map));
}
/// <summary>
/// Creates an index for the specified table and column.
/// </summary>
/// <param name="tableName">Name of the database table</param>
/// <param name="columnName">Name of the column to index</param>
/// <param name="unique">Whether the index should be unique</param>
public Task<int> CreateIndexAsync(string tableName, string columnName, bool unique = false)
{
return WriteAsync(conn => conn.CreateIndex(tableName, columnName, unique));
}
/// <summary>
/// Creates an index for the specified table and column.
/// </summary>
/// <param name="indexName">Name of the index to create</param>
/// <param name="tableName">Name of the database table</param>
/// <param name="columnName">Name of the column to index</param>
/// <param name="unique">Whether the index should be unique</param>
public Task<int> CreateIndexAsync(string indexName, string tableName, string columnName, bool unique = false)
{
return WriteAsync(conn => conn.CreateIndex(indexName, tableName, columnName, unique));
}
/// <summary>
/// Creates an index for the specified table and columns.
/// </summary>
/// <param name="tableName">Name of the database table</param>
/// <param name="columnNames">An array of column names to index</param>
/// <param name="unique">Whether the index should be unique</param>
public Task<int> CreateIndexAsync(string tableName, string[] columnNames, bool unique = false)
{
return WriteAsync(conn => conn.CreateIndex(tableName, columnNames, unique));
}
/// <summary>
/// Creates an index for the specified table and columns.
/// </summary>
/// <param name="indexName">Name of the index to create</param>
/// <param name="tableName">Name of the database table</param>
/// <param name="columnNames">An array of column names to index</param>
/// <param name="unique">Whether the index should be unique</param>
public Task<int> CreateIndexAsync(string indexName, string tableName, string[] columnNames, bool unique = false)
{
return WriteAsync(conn => conn.CreateIndex(indexName, tableName, columnNames, unique));
}
/// <summary>
/// Creates an index for the specified object property.
/// e.g. CreateIndex<Client>(c => c.Name);
/// </summary>
/// <typeparam name="T">Type to reflect to a database table.</typeparam>
/// <param name="property">Property to index</param>
/// <param name="unique">Whether the index should be unique</param>
public Task<int> CreateIndexAsync<T>(Expression<Func<T, object>> property, bool unique = false)
{
return WriteAsync(conn => conn.CreateIndex(property, unique));
}
/// <summary>
/// Inserts the given object and retrieves its
/// auto incremented primary key if it has one.
/// </summary>
/// <param name="obj">
/// The object to insert.
/// </param>
/// <returns>
/// The number of rows added to the table.
/// </returns>
public Task<int> InsertAsync(object obj)
{
return WriteAsync(conn => conn.Insert(obj));
}
/// <summary>
/// Inserts the given object (and updates its
/// auto incremented primary key if it has one).
/// The return value is the number of rows added to the table.
/// </summary>
/// <param name="obj">
/// The object to insert.
/// </param>
/// <param name="objType">
/// The type of object to insert.
/// </param>
/// <returns>
/// The number of rows added to the table.
/// </returns>
public Task<int> InsertAsync(object obj, Type objType)
{
return WriteAsync(conn => conn.Insert(obj, objType));
}
/// <summary>
/// Inserts the given object (and updates its
/// auto incremented primary key if it has one).
/// The return value is the number of rows added to the table.
/// </summary>
/// <param name="obj">
/// The object to insert.
/// </param>
/// <param name="extra">
/// Literal SQL code that gets placed into the command. INSERT {extra} INTO ...
/// </param>
/// <returns>
/// The number of rows added to the table.
/// </returns>
public Task<int> InsertAsync(object obj, string extra)
{
return WriteAsync(conn => conn.Insert(obj, extra));
}
/// <summary>
/// Inserts the given object (and updates its
/// auto incremented primary key if it has one).
/// The return value is the number of rows added to the table.
/// </summary>
/// <param name="obj">
/// The object to insert.
/// </param>
/// <param name="extra">
/// Literal SQL code that gets placed into the command. INSERT {extra} INTO ...
/// </param>
/// <param name="objType">
/// The type of object to insert.
/// </param>
/// <returns>
/// The number of rows added to the table.
/// </returns>
public Task<int> InsertAsync(object obj, string extra, Type objType)
{
return WriteAsync(conn => conn.Insert(obj, extra, objType));
}
/// <summary>
/// Inserts the given object (and updates its
/// auto incremented primary key if it has one).
/// The return value is the number of rows added to the table.
/// If a UNIQUE constraint violation occurs with
/// some pre-existing object, this function deletes
/// the old object.
/// </summary>
/// <param name="obj">
/// The object to insert.
/// </param>
/// <returns>
/// The number of rows modified.
/// </returns>
public Task<int> InsertOrReplaceAsync(object obj)
{
return WriteAsync(conn => conn.InsertOrReplace(obj));
}
/// <summary>
/// Inserts the given object (and updates its
/// auto incremented primary key if it has one).
/// The return value is the number of rows added to the table.
/// If a UNIQUE constraint violation occurs with
/// some pre-existing object, this function deletes
/// the old object.
/// </summary>
/// <param name="obj">
/// The object to insert.
/// </param>
/// <param name="objType">
/// The type of object to insert.
/// </param>
/// <returns>
/// The number of rows modified.
/// </returns>
public Task<int> InsertOrReplaceAsync(object obj, Type objType)
{
return WriteAsync(conn => conn.InsertOrReplace(obj, objType));
}
/// <summary>
/// Updates all of the columns of a table using the specified object
/// except for its primary key.
/// The object is required to have a primary key.
/// </summary>
/// <param name="obj">
/// The object to update. It must have a primary key designated using the PrimaryKeyAttribute.
/// </param>
/// <returns>
/// The number of rows updated.
/// </returns>
public Task<int> UpdateAsync(object obj)
{
return WriteAsync(conn => conn.Update(obj));
}
/// <summary>
/// Updates all of the columns of a table using the specified object
/// except for its primary key.
/// The object is required to have a primary key.
/// </summary>
/// <param name="obj">
/// The object to update. It must have a primary key designated using the PrimaryKeyAttribute.
/// </param>
/// <param name="objType">
/// The type of object to insert.
/// </param>
/// <returns>
/// The number of rows updated.
/// </returns>
public Task<int> UpdateAsync(object obj, Type objType)
{
return WriteAsync(conn => conn.Update(obj, objType));
}
/// <summary>
/// Updates all specified objects.
/// </summary>
/// <param name="objects">
/// An <see cref="IEnumerable"/> of the objects to insert.
/// </param>
/// <param name="runInTransaction">
/// A boolean indicating if the inserts should be wrapped in a transaction
/// </param>
/// <returns>
/// The number of rows modified.
/// </returns>
public Task<int> UpdateAllAsync(IEnumerable objects, bool runInTransaction = true)
{
return WriteAsync(conn => conn.UpdateAll(objects, runInTransaction));
}
/// <summary>
/// Deletes the given object from the database using its primary key.
/// </summary>
/// <param name="objectToDelete">
/// The object to delete. It must have a primary key designated using the PrimaryKeyAttribute.
/// </param>
/// <returns>
/// The number of rows deleted.
/// </returns>
public Task<int> DeleteAsync(object objectToDelete)
{
return WriteAsync(conn => conn.Delete(objectToDelete));
}
/// <summary>
/// Deletes the object with the specified primary key.
/// </summary>
/// <param name="primaryKey">
/// The primary key of the object to delete.
/// </param>
/// <returns>
/// The number of objects deleted.
/// </returns>
/// <typeparam name='T'>
/// The type of object.
/// </typeparam>
public Task<int> DeleteAsync<T>(object primaryKey)
{
return WriteAsync(conn => conn.Delete<T>(primaryKey));
}
/// <summary>
/// Deletes the object with the specified primary key.
/// </summary>
/// <param name="primaryKey">
/// The primary key of the object to delete.
/// </param>
/// <param name="map">
/// The TableMapping used to identify the table.
/// </param>
/// <returns>
/// The number of objects deleted.
/// </returns>
public Task<int> DeleteAsync(object primaryKey, TableMapping map)
{
return WriteAsync(conn => conn.Delete(primaryKey, map));
}
/// <summary>
/// Deletes all the objects from the specified table.
/// WARNING WARNING: Let me repeat. It deletes ALL the objects from the
/// specified table. Do you really want to do that?
/// </summary>
/// <returns>
/// The number of objects deleted.
/// </returns>
/// <typeparam name='T'>
/// The type of objects to delete.
/// </typeparam>
public Task<int> DeleteAllAsync<T>()
{
return WriteAsync(conn => conn.DeleteAll<T>());
}
/// <summary>
/// Deletes all the objects from the specified table.
/// WARNING WARNING: Let me repeat. It deletes ALL the objects from the
/// specified table. Do you really want to do that?
/// </summary>
/// <param name="map">
/// The TableMapping used to identify the table.
/// </param>
/// <returns>
/// The number of objects deleted.
/// </returns>
public Task<int> DeleteAllAsync(TableMapping map)
{
return WriteAsync(conn => conn.DeleteAll(map));
}
/// <summary>
/// Attempts to retrieve an object with the given primary key from the table
/// associated with the specified type. Use of this method requires that
/// the given type have a designated PrimaryKey (using the PrimaryKeyAttribute).
/// </summary>
/// <param name="pk">
/// The primary key.
/// </param>
/// <returns>
/// The object with the given primary key. Throws a not found exception
/// if the object is not found.
/// </returns>
public Task<T> GetAsync<T>(object pk)
where T : new()
{
return ReadAsync(conn => conn.Get<T>(pk));
}
/// <summary>
/// Attempts to retrieve an object with the given primary key from the table
/// associated with the specified type. Use of this method requires that
/// the given type have a designated PrimaryKey (using the PrimaryKeyAttribute).
/// </summary>
/// <param name="pk">
/// The primary key.
/// </param>
/// <param name="map">
/// The TableMapping used to identify the table.
/// </param>
/// <returns>
/// The object with the given primary key. Throws a not found exception
/// if the object is not found.
/// </returns>
public Task<object> GetAsync(object pk, TableMapping map)
{
return ReadAsync(conn => conn.Get(pk, map));
}
/// <summary>
/// Attempts to retrieve the first object that matches the predicate from the table
/// associated with the specified type.
/// </summary>
/// <param name="predicate">
/// A predicate for which object to find.
/// </param>
/// <returns>
/// The object that matches the given predicate. Throws a not found exception
/// if the object is not found.
/// </returns>
public Task<T> GetAsync<T>(Expression<Func<T, bool>> predicate)
where T : new()
{
return ReadAsync(conn => conn.Get<T>(predicate));
}
/// <summary>
/// Attempts to retrieve an object with the given primary key from the table
/// associated with the specified type. Use of this method requires that
/// the given type have a designated PrimaryKey (using the PrimaryKeyAttribute).
/// </summary>
/// <param name="pk">
/// The primary key.
/// </param>
/// <returns>
/// The object with the given primary key or null
/// if the object is not found.
/// </returns>
public Task<T> FindAsync<T>(object pk)
where T : new()
{
return ReadAsync(conn => conn.Find<T>(pk));
}
/// <summary>
/// Attempts to retrieve an object with the given primary key from the table
/// associated with the specified type. Use of this method requires that
/// the given type have a designated PrimaryKey (using the PrimaryKeyAttribute).
/// </summary>
/// <param name="pk">
/// The primary key.
/// </param>
/// <param name="map">
/// The TableMapping used to identify the table.
/// </param>
/// <returns>
/// The object with the given primary key or null
/// if the object is not found.
/// </returns>
public Task<object> FindAsync(object pk, TableMapping map)
{
return ReadAsync(conn => conn.Find(pk, map));
}
/// <summary>
/// Attempts to retrieve the first object that matches the predicate from the table
/// associated with the specified type.
/// </summary>
/// <param name="predicate">
/// A predicate for which object to find.
/// </param>
/// <returns>
/// The object that matches the given predicate or null
/// if the object is not found.
/// </returns>
public Task<T> FindAsync<T>(Expression<Func<T, bool>> predicate)
where T : new()
{
return ReadAsync(conn => conn.Find<T>(predicate));
}
/// <summary>
/// Attempts to retrieve the first object that matches the query from the table
/// associated with the specified type.
/// </summary>
/// <param name="query">
/// The fully escaped SQL.
/// </param>
/// <param name="args">
/// Arguments to substitute for the occurences of '?' in the query.
/// </param>
/// <returns>
/// The object that matches the given predicate or null
/// if the object is not found.
/// </returns>
public Task<T> FindWithQueryAsync<T>(string query, params object[] args)
where T : new()
{
return ReadAsync(conn => conn.FindWithQuery<T>(query, args));
}
/// <summary>
/// Attempts to retrieve the first object that matches the query from the table
/// associated with the specified type.
/// </summary>
/// <param name="map">
/// The TableMapping used to identify the table.
/// </param>
/// <param name="query">
/// The fully escaped SQL.
/// </param>
/// <param name="args">
/// Arguments to substitute for the occurences of '?' in the query.
/// </param>
/// <returns>
/// The object that matches the given predicate or null
/// if the object is not found.
/// </returns>
public Task<object> FindWithQueryAsync(TableMapping map, string query, params object[] args)
{
return ReadAsync(conn => conn.FindWithQuery(map, query, args));
}
/// <summary>
/// Retrieves the mapping that is automatically generated for the given type.
/// </summary>
/// <param name="type">
/// The type whose mapping to the database is returned.
/// </param>
/// <param name="createFlags">
/// Optional flags allowing implicit PK and indexes based on naming conventions
/// </param>
/// <returns>
/// The mapping represents the schema of the columns of the database and contains
/// methods to set and get properties of objects.
/// </returns>
public Task<TableMapping> GetMappingAsync(Type type, CreateFlags createFlags = CreateFlags.None)
{
return ReadAsync(conn => conn.GetMapping(type, createFlags));
}
/// <summary>
/// Retrieves the mapping that is automatically generated for the given type.
/// </summary>
/// <param name="createFlags">
/// Optional flags allowing implicit PK and indexes based on naming conventions
/// </param>
/// <returns>
/// The mapping represents the schema of the columns of the database and contains
/// methods to set and get properties of objects.
/// </returns>
public Task<TableMapping> GetMappingAsync<T>(CreateFlags createFlags = CreateFlags.None)
where T : new()
{
return ReadAsync(conn => conn.GetMapping<T>(createFlags));
}
/// <summary>
/// Query the built-in sqlite table_info table for a specific tables columns.
/// </summary>
/// <returns>The columns contains in the table.</returns>
/// <param name="tableName">Table name.</param>
public Task<List<SQLiteConnection.ColumnInfo>> GetTableInfoAsync(string tableName)
{
return ReadAsync(conn => conn.GetTableInfo(tableName));
}
/// <summary>
/// Creates a SQLiteCommand given the command text (SQL) with arguments. Place a '?'
/// in the command text for each of the arguments and then executes that command.
/// Use this method instead of Query when you don't expect rows back. Such cases include
/// INSERTs, UPDATEs, and DELETEs.
/// You can set the Trace or TimeExecution properties of the connection
/// to profile execution.
/// </summary>
/// <param name="query">
/// The fully escaped SQL.
/// </param>
/// <param name="args">
/// Arguments to substitute for the occurences of '?' in the query.
/// </param>
/// <returns>
/// The number of rows modified in the database as a result of this execution.
/// </returns>
public Task<int> ExecuteAsync(string query, params object[] args)
{
return WriteAsync(conn => conn.Execute(query, args));
}
/// <summary>
/// Inserts all specified objects.
/// </summary>
/// <param name="objects">
/// An <see cref="IEnumerable"/> of the objects to insert.
/// <param name="runInTransaction"/>
/// A boolean indicating if the inserts should be wrapped in a transaction.
/// </param>
/// <returns>
/// The number of rows added to the table.
/// </returns>
public Task<int> InsertAllAsync(IEnumerable objects, bool runInTransaction = true)
{
return WriteAsync(conn => conn.InsertAll(objects, runInTransaction));
}
/// <summary>
/// Inserts all specified objects.
/// </summary>
/// <param name="objects">
/// An <see cref="IEnumerable"/> of the objects to insert.
/// </param>
/// <param name="extra">
/// Literal SQL code that gets placed into the command. INSERT {extra} INTO ...
/// </param>
/// <param name="runInTransaction">
/// A boolean indicating if the inserts should be wrapped in a transaction.
/// </param>
/// <returns>
/// The number of rows added to the table.
/// </returns>
public Task<int> InsertAllAsync(IEnumerable objects, string extra, bool runInTransaction = true)
{
return WriteAsync(conn => conn.InsertAll(objects, extra, runInTransaction));
}
/// <summary>
/// Inserts all specified objects.
/// </summary>
/// <param name="objects">
/// An <see cref="IEnumerable"/> of the objects to insert.
/// </param>
/// <param name="objType">
/// The type of object to insert.
/// </param>
/// <param name="runInTransaction">
/// A boolean indicating if the inserts should be wrapped in a transaction.
/// </param>
/// <returns>
/// The number of rows added to the table.
/// </returns>
public Task<int> InsertAllAsync(IEnumerable objects, Type objType, bool runInTransaction = true)
{
return WriteAsync(conn => conn.InsertAll(objects, objType, runInTransaction));
}
/// <summary>
/// Executes <paramref name="action"/> within a (possibly nested) transaction by wrapping it in a SAVEPOINT. If an
/// exception occurs the whole transaction is rolled back, not just the current savepoint. The exception
/// is rethrown.
/// </summary>
/// <param name="action">
/// The <see cref="Action"/> to perform within a transaction. <paramref name="action"/> can contain any number
/// of operations on the connection but should never call <see cref="SQLiteConnection.Commit"/> or
/// <see cref="SQLiteConnection.Commit"/>.
/// </param>
public Task RunInTransactionAsync(Action<SQLiteConnection> action)
{
return WriteAsync<object>(conn => {
conn.BeginTransaction();
try
{
action(conn);
conn.Commit();
return null;
}
catch (Exception)
{
conn.Rollback();
throw;
}
});
}
/// <summary>
/// Returns a queryable interface to the table represented by the given type.
/// </summary>
/// <returns>
/// A queryable object that is able to translate Where, OrderBy, and Take
/// queries into native SQL.
/// </returns>
public AsyncTableQuery<T> Table<T>()
where T : new()
{
//
// This isn't async as the underlying connection doesn't go out to the database
// until the query is performed. The Async methods are on the query iteself.
//
var conn = GetConnection();
return new AsyncTableQuery<T>(conn.Table<T>());
}
/// <summary>
/// Creates a SQLiteCommand given the command text (SQL) with arguments. Place a '?'
/// in the command text for each of the arguments and then executes that command.
/// Use this method when return primitive values.
/// You can set the Trace or TimeExecution properties of the connection
/// to profile execution.
/// </summary>
/// <param name="query">