/// <summary>
/// This function binds a user-defined functions to a connection.
/// </summary>
/// <param name="sqliteBase">
/// The <see cref="SQLiteBase" /> object instance associated with the
/// <see cref="SQLiteConnection" /> that the function should be bound to.
/// </param>
/// <param name="functionAttribute">
/// The <see cref="SQLiteFunctionAttribute"/> object instance containing
/// the metadata for the function to be bound.
/// </param>
/// <param name="function">
/// The <see cref="SQLiteFunction"/> object instance that implements the
/// function to be bound.
/// </param>
/// <param name="flags">
/// The flags associated with the parent connection object.
/// </param>
internal static void BindFunction(
SQLiteBase sqliteBase,
SQLiteFunctionAttribute functionAttribute,
SQLiteFunction function,
SQLiteConnectionFlags flags
)
{
if (sqliteBase == null)
{
throw new ArgumentNullException("sqliteBase");
}
if (functionAttribute == null)
{
throw new ArgumentNullException("functionAttribute");
}
if (function == null)
{
throw new ArgumentNullException("function");
}
FunctionType functionType = functionAttribute.FuncType;
function._base = sqliteBase;
function._flags = flags;
function._InvokeFunc = (functionType == FunctionType.Scalar) ?
new SQLiteCallback(function.ScalarCallback) : null;
function._StepFunc = (functionType == FunctionType.Aggregate) ?
new SQLiteCallback(function.StepCallback) : null;
function._FinalFunc = (functionType == FunctionType.Aggregate) ?
new SQLiteFinalCallback(function.FinalCallback) : null;
function._CompareFunc = (functionType == FunctionType.Collation) ?
new SQLiteCollation(function.CompareCallback) : null;
function._CompareFunc16 = (functionType == FunctionType.Collation) ?
new SQLiteCollation(function.CompareCallback16) : null;
string name = functionAttribute.Name;
if (functionType != FunctionType.Collation)
{
bool needCollSeq = (function is SQLiteFunctionEx);
sqliteBase.CreateFunction(
name, functionAttribute.Arguments, needCollSeq,
function._InvokeFunc, function._StepFunc,
function._FinalFunc);
}
else
{
sqliteBase.CreateCollation(
name, function._CompareFunc, function._CompareFunc16);
}
}
static SQLiteFunction()
{
try
{
Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
int length = assemblies.Length;
AssemblyName name = Assembly.GetCallingAssembly().GetName();
for (int i = 0; i < length; i++)
{
Type[] types;
bool flag = false;
try
{
AssemblyName[] referencedAssemblies = assemblies[i].GetReferencedAssemblies();
int num3 = referencedAssemblies.Length;
for (int k = 0; k < num3; k++)
{
if (referencedAssemblies[k].Name == name.Name)
{
flag = true;
break;
}
}
if (!flag)
{
continue;
}
types = assemblies[i].GetTypes();
}
catch (ReflectionTypeLoadException exception)
{
types = exception.Types;
}
int num5 = types.Length;
for (int j = 0; j < num5; j++)
{
if (types[j] != null)
{
object[] customAttributes = types[j].GetCustomAttributes(typeof(SQLiteFunctionAttribute), false);
int num7 = customAttributes.Length;
for (int m = 0; m < num7; m++)
{
SQLiteFunctionAttribute item = customAttributes[m] as SQLiteFunctionAttribute;
if (item != null)
{
item._instanceType = types[j];
_registeredFunctions.Add(item);
}
}
}
}
}
}
catch
{
}
}
public static void RegisterFunction(Type typ)
{
object[] customAttributes = typ.GetCustomAttributes(typeof(SQLiteFunctionAttribute), false);
int length = customAttributes.Length;
for (int i = 0; i < length; i++)
{
SQLiteFunctionAttribute item = customAttributes[i] as SQLiteFunctionAttribute;
if (item != null)
{
item._instanceType = typ;
_registeredFunctions.Add(item);
}
}
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Attempts to bind the specified <see cref="SQLiteFunction" /> object
/// instance to this connection.
/// </summary>
/// <param name="functionAttribute">
/// The <see cref="SQLiteFunctionAttribute"/> object instance containing
/// the metadata for the function to be bound.
/// </param>
/// <param name="function">
/// The <see cref="SQLiteFunction"/> object instance that implements the
/// function to be bound.
/// </param>
public void BindFunction(
SQLiteFunctionAttribute functionAttribute,
SQLiteFunction function
)
{
CheckDisposed();
if (_sql == null)
throw new InvalidOperationException(
"Database connection not valid for binding functions.");
_sql.BindFunction(functionAttribute, function, _flags);
}
/// <summary> /// This function binds a user-defined functions to the connection. /// </summary> /// <param name="functionAttribute"> /// The <see cref="SQLiteFunctionAttribute"/> object instance containing /// the metadata for the function to be bound. /// </param> /// <param name="function"> /// The <see cref="SQLiteFunction"/> object instance that implements the /// function to be bound. /// </param> /// <param name="flags"> /// The flags associated with the parent connection object. /// </param> internal abstract void BindFunction(SQLiteFunctionAttribute functionAttribute, SQLiteFunction function, SQLiteConnectionFlags flags);
/// <summary>
/// This function binds a user-defined functions to a connection.
/// </summary>
/// <param name="sqliteBase">
/// The <see cref="SQLiteBase" /> object instance associated with the
/// <see cref="SQLiteConnection" /> that the function should be bound to.
/// </param>
/// <param name="functionAttribute">
/// The <see cref="SQLiteFunctionAttribute"/> object instance containing
/// the metadata for the function to be bound.
/// </param>
/// <param name="function">
/// The <see cref="SQLiteFunction"/> object instance that implements the
/// function to be bound.
/// </param>
/// <param name="flags">
/// The flags associated with the parent connection object.
/// </param>
internal static void BindFunction(
SQLiteBase sqliteBase,
SQLiteFunctionAttribute functionAttribute,
SQLiteFunction function,
SQLiteConnectionFlags flags
)
{
if (sqliteBase == null)
throw new ArgumentNullException("sqliteBase");
if (functionAttribute == null)
throw new ArgumentNullException("functionAttribute");
if (function == null)
throw new ArgumentNullException("function");
FunctionType functionType = functionAttribute.FuncType;
function._base = sqliteBase;
function._flags = flags;
function._InvokeFunc = (functionType == FunctionType.Scalar) ?
new SQLiteCallback(function.ScalarCallback) : null;
function._StepFunc = (functionType == FunctionType.Aggregate) ?
new SQLiteCallback(function.StepCallback) : null;
function._FinalFunc = (functionType == FunctionType.Aggregate) ?
new SQLiteFinalCallback(function.FinalCallback) : null;
function._CompareFunc = (functionType == FunctionType.Collation) ?
new SQLiteCollation(function.CompareCallback) : null;
function._CompareFunc16 = (functionType == FunctionType.Collation) ?
new SQLiteCollation(function.CompareCallback16) : null;
string name = functionAttribute.Name;
if (functionType != FunctionType.Collation)
{
bool needCollSeq = (function is SQLiteFunctionEx);
sqliteBase.CreateFunction(
name, functionAttribute.Arguments, needCollSeq,
function._InvokeFunc, function._StepFunc,
function._FinalFunc);
}
else
{
sqliteBase.CreateCollation(
name, function._CompareFunc, function._CompareFunc16);
}
}
/// <summary> /// This function binds a user-defined functions to the connection. /// </summary> /// <param name="functionAttribute"> /// The <see cref="SQLiteFunctionAttribute"/> object instance containing /// the metadata for the function to be bound. /// </param> /// <param name="function"> /// The <see cref="SQLiteFunction"/> object instance that implements the /// function to be bound. /// </param> /// <param name="flags"> /// The flags associated with the parent connection object. /// </param> internal abstract void BindFunction(SQLiteFunctionAttribute functionAttribute, SQLiteFunction function, SQLiteConnectionFlags flags);
/// <summary>
/// This function binds a user-defined function to the connection.
/// </summary>
/// <param name="functionAttribute">
/// The <see cref="SQLiteFunctionAttribute"/> object instance containing
/// the metadata for the function to be bound.
/// </param>
/// <param name="function">
/// The <see cref="SQLiteFunction"/> object instance that implements the
/// function to be bound.
/// </param>
/// <param name="flags">
/// The flags associated with the parent connection object.
/// </param>
internal override void BindFunction(
SQLiteFunctionAttribute functionAttribute,
SQLiteFunction function,
SQLiteConnectionFlags flags
)
{
SQLiteFunction.BindFunction(this, functionAttribute, function, flags);
if (_functions == null)
_functions = new List<SQLiteFunction>();
_functions.Add(function);
}
/// <summary> /// This function unbinds a user-defined function from the connection. /// </summary> /// <param name="functionAttribute"> /// The <see cref="SQLiteFunctionAttribute"/> object instance containing /// the metadata for the function to be unbound. /// </param> /// <param name="flags"> /// The flags associated with the parent connection object. /// </param> /// <returns>Non-zero if the function was unbound.</returns> internal abstract bool UnbindFunction(SQLiteFunctionAttribute functionAttribute, SQLiteConnectionFlags flags);
/// <summary>
/// This function binds a user-defined function to the connection.
/// </summary>
/// <param name="functionAttribute">
/// The <see cref="SQLiteFunctionAttribute"/> object instance containing
/// the metadata for the function to be unbound.
/// </param>
/// <param name="flags">
/// The flags associated with the parent connection object.
/// </param>
/// <returns>Non-zero if the function was unbound and removed.</returns>
internal override bool UnbindFunction(
SQLiteFunctionAttribute functionAttribute,
SQLiteConnectionFlags flags
)
{
if (functionAttribute == null)
throw new ArgumentNullException("functionAttribute");
if (_functions == null)
return false;
SQLiteFunction function;
if (_functions.TryGetValue(functionAttribute, out function))
{
if (SQLiteFunction.UnbindFunction(
this, functionAttribute, function, flags) &&
_functions.Remove(functionAttribute))
{
return true;
}
}
return false;
}
/// <summary>
/// This function binds a user-defined function to the connection.
/// </summary>
/// <param name="functionAttribute">
/// The <see cref="SQLiteFunctionAttribute"/> object instance containing
/// the metadata for the function to be bound.
/// </param>
/// <param name="function">
/// The <see cref="SQLiteFunction"/> object instance that implements the
/// function to be bound.
/// </param>
/// <param name="flags">
/// The flags associated with the parent connection object.
/// </param>
internal override void BindFunction(
SQLiteFunctionAttribute functionAttribute,
SQLiteFunction function,
SQLiteConnectionFlags flags
)
{
if (functionAttribute == null)
throw new ArgumentNullException("functionAttribute");
if (function == null)
throw new ArgumentNullException("function");
SQLiteFunction.BindFunction(this, functionAttribute, function, flags);
if (_functions == null)
_functions = new Dictionary<SQLiteFunctionAttribute, SQLiteFunction>();
_functions[functionAttribute] = function;
}
/// <summary>
/// Creates a <see cref="SQLiteFunction" /> instance based on the specified
/// <see cref="SQLiteFunctionAttribute" />.
/// </summary>
/// <param name="functionAttribute">
/// The <see cref="SQLiteFunctionAttribute" /> containing the metadata about
/// the function to create.
/// </param>
/// <param name="function">
/// The created function -OR- null if the function could not be created.
/// </param>
/// <returns>
/// Non-zero if the function was created; otherwise, zero.
/// </returns>
private static bool CreateFunction(
SQLiteFunctionAttribute functionAttribute,
out SQLiteFunction function
)
{
if (functionAttribute == null)
{
function = null;
return false;
}
else if ((functionAttribute.Callback1 != null) ||
(functionAttribute.Callback2 != null))
{
function = new SQLiteDelegateFunction(
functionAttribute.Callback1,
functionAttribute.Callback2);
return true;
}
else if (functionAttribute.InstanceType != null)
{
function = (SQLiteFunction)Activator.CreateInstance(
functionAttribute.InstanceType);
return true;
}
else
{
function = null;
return false;
}
}
/// <summary>
/// Alternative method of registering a function. This method
/// does not require the specified type to be annotated with
/// <see cref="SQLiteFunctionAttribute" />.
/// </summary>
/// <param name="name">
/// The name of the function to register.
/// </param>
/// <param name="argumentCount">
/// The number of arguments accepted by the function.
/// </param>
/// <param name="functionType">
/// The type of SQLite function being resitered (e.g. scalar,
/// aggregate, or collating sequence).
/// </param>
/// <param name="instanceType">
/// The <see cref="Type" /> that actually implements the function.
/// This will only be used if the <paramref name="callback1" />
/// and <paramref name="callback2" /> parameters are null.
/// </param>
/// <param name="callback1">
/// The <see cref="Delegate" /> to be used for all calls into the
/// <see cref="SQLiteFunction.Invoke" />,
/// <see cref="SQLiteFunction.Step" />,
/// and <see cref="SQLiteFunction.Compare" /> virtual methods.
/// </param>
/// <param name="callback2">
/// The <see cref="Delegate" /> to be used for all calls into the
/// <see cref="SQLiteFunction.Final" /> virtual method. This
/// parameter is only necessary for aggregate functions.
/// </param>
public static void RegisterFunction(
string name,
int argumentCount,
FunctionType functionType,
Type instanceType,
Delegate callback1,
Delegate callback2
)
{
SQLiteFunctionAttribute at = new SQLiteFunctionAttribute(
name, argumentCount, functionType);
at.InstanceType = instanceType;
at.Callback1 = callback1;
at.Callback2 = callback2;
_registeredFunctions.Add(at, null);
}
/// <summary>
/// This function unbinds a user-defined functions from a connection.
/// </summary>
/// <param name="sqliteBase">
/// The <see cref="SQLiteBase" /> object instance associated with the
/// <see cref="SQLiteConnection" /> that the function should be bound to.
/// </param>
/// <param name="functionAttribute">
/// The <see cref="SQLiteFunctionAttribute"/> object instance containing
/// the metadata for the function to be bound.
/// </param>
/// <param name="function">
/// The <see cref="SQLiteFunction"/> object instance that implements the
/// function to be bound.
/// </param>
/// <param name="flags">
/// The flags associated with the parent connection object.
/// </param>
/// <returns>Non-zero if the function was unbound.</returns>
internal static bool UnbindFunction(
SQLiteBase sqliteBase,
SQLiteFunctionAttribute functionAttribute,
SQLiteFunction function,
SQLiteConnectionFlags flags /* NOT USED */
)
{
if (sqliteBase == null)
throw new ArgumentNullException("sqliteBase");
if (functionAttribute == null)
throw new ArgumentNullException("functionAttribute");
if (function == null)
throw new ArgumentNullException("function");
FunctionType functionType = functionAttribute.FuncType;
string name = functionAttribute.Name;
if (functionType != FunctionType.Collation)
{
bool needCollSeq = (function is SQLiteFunctionEx);
return sqliteBase.CreateFunction(
name, functionAttribute.Arguments, needCollSeq,
null, null, null, false) == SQLiteErrorCode.Ok;
}
else
{
return sqliteBase.CreateCollation(
name, null, null, false) == SQLiteErrorCode.Ok;
}
}
