Deveel.Data.Routines.ExternalFunction Class Reference

Inheritance diagram for Deveel.Data.Routines.ExternalFunction:

Public Member Functions
	ExternalFunction (FunctionInfo functionInfo)
override InvokeResult	Execute (InvokeContext context)
	Executes the function and provides a result. More...
override SqlType	ReturnType (InvokeContext context)
	Resolves the function return type against the given context. More...
Public Member Functions inherited from Deveel.Data.Routines.Function
SqlType	ReturnType ()
	Gets the function static return type More...

Private Member Functions
DataObject	ConvertValue (object value, SqlType sqlType)
object[]	ConvertArguments (MethodInfo methodInfo, DataObject[] args)
MethodInfo	DiscoverMethod ()

Private Attributes
MethodInfo	method

Additional Inherited Members
Static Public Attributes inherited from Deveel.Data.Routines.Function
static readonly SqlType	DynamicType = new DynamicSqlType()
	A special SqlType that is used to mark an argument of a function as dynamic. More...
Protected Member Functions inherited from Deveel.Data.Routines.Function
	Function (FunctionInfo functionInfo)
	Function (ObjectName name, RoutineParameter[] parameters, FunctionType functionType)
	Function (ObjectName name, RoutineParameter[] parameters, SqlType returnType)
	Function (ObjectName name, RoutineParameter[] parameters, SqlType returnType, FunctionType functionType)
Properties inherited from Deveel.Data.Routines.Function
FunctionType	FunctionType [get]
FunctionInfo	FunctionInfo [get, private set]
ObjectName	FunctionName [get]
RoutineInfo IRoutine.	RoutineInfo [get]
RoutineType IRoutine.	Type [get]
DbObjectType IDbObject.	ObjectType [get]
ObjectName IDbObject.	FullName [get]
Properties inherited from Deveel.Data.Routines.IFunction
FunctionType	FunctionType [get]
	Gets the type of function. More...
Properties inherited from Deveel.Data.Routines.IRoutine
RoutineType	Type [get]
	Gets the type of routine that will be executed. More...
RoutineInfo	RoutineInfo [get]
Properties inherited from Deveel.Data.Sql.IDbObject
ObjectName	FullName [get]
	Gets the fully qualified name of the object used to resolve it uniquely within the database. More...
DbObjectType	ObjectType [get]
	Gets the type of database object that the implementation is for More...

Detailed Description

Definition at line 23 of file ExternalFunction.cs.

Constructor & Destructor Documentation

Deveel.Data.Routines.ExternalFunction.ExternalFunction ( FunctionInfo  functionInfo )

inline

Definition at line 26 of file ExternalFunction.cs.

            : base(functionInfo) {
            if (functionInfo.FunctionType != FunctionType.External)
                throw new ArgumentException("The information specified are not pointing to any external function.");
        }

Member Function Documentation

object [] Deveel.Data.Routines.ExternalFunction.ConvertArguments ( MethodInfo  methodInfo, DataObject[]  args  )

inlineprivate

Definition at line 55 of file ExternalFunction.cs.

                                                                                    {
            var methodParams = methodInfo.GetParameters();

            if (methodParams.Length != args.Length)
                throw new InvalidOperationException();      // TODO: support the case of the Unbounded parameters

            var values = new object[args.Length];
            for (int i = 0; i < args.Length; i++) {
                var paramType = methodParams[i].ParameterType;
                var sqlType = PrimitiveTypes.FromType(paramType);

                values[i] = sqlType.ConvertTo(args[i].Value, paramType);
            }

            return values;
        }

DataObject Deveel.Data.Routines.ExternalFunction.ConvertValue ( object  value, SqlType  sqlType  )

inlineprivate

Definition at line 51 of file ExternalFunction.cs.

                                                                       {
            throw new NotImplementedException();
        }

MethodInfo Deveel.Data.Routines.ExternalFunction.DiscoverMethod ( )

inlineprivate

Definition at line 79 of file ExternalFunction.cs.

                                            {
            var type = FunctionInfo.ExternalType;
            var methodName = FunctionInfo.ExternalMethodName;
            if (String.IsNullOrEmpty(methodName))
                methodName = FunctionInfo.RoutineName.Name;

            throw new NotImplementedException();
        }

override InvokeResult Deveel.Data.Routines.ExternalFunction.Execute ( InvokeContext  context )

inlinevirtual

Executes the function and provides a result.

Parameters

context

The context of the execution.

Returns

Returns a InvokeResult instance that encapsulates the returned value of the function.

See also

InvokeResult.ReturnValue

Implements Deveel.Data.Routines.Function.

Definition at line 32 of file ExternalFunction.cs.

                                                                    {
            if (method == null)
                method = DiscoverMethod();

            if (method == null)
                throw new InvalidOperationException();

            var args = context.EvaluatedArguments;

            try {
                var methodArgs = ConvertArguments(method, args);
                var result = method.Invoke(null, methodArgs);

                return  context.Result(ConvertValue(result, ReturnType()));
            } catch (Exception) {
                throw;
            }
        }

override SqlType Deveel.Data.Routines.ExternalFunction.ReturnType ( InvokeContext  context )

inlinevirtual

Resolves the function return type against the given context.

Parameters

context

The execution context used to resolve the function return type.

Returns

Returns an instance of SqlType that defines the type of the returned value resolved against the given execution context..

Reimplemented from Deveel.Data.Routines.Function.

Definition at line 72 of file ExternalFunction.cs.

                                                                  {
            if (method == null)
                method = DiscoverMethod();

            return base.ReturnType(context);
        }

Member Data Documentation

MethodInfo Deveel.Data.Routines.ExternalFunction.method

private

Definition at line 24 of file ExternalFunction.cs.

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The documentation for this class was generated from the following file:

• /var/calculate/remote/distfiles/egit-src/deveeldb.git/src/deveeldb/Deveel.Data.Routines/ExternalFunction.cs