#region License
//=============================================================================
// Vici Core - Productivity Library for .NET 3.5
//
// Copyright (c) 2008-2010 Philippe Leybaert
//
// 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.
//=============================================================================
#endregion
using System;
using System.Collections.Generic;
using System.Reflection;
namespace Vici.Core.Parser{
public class CallExpression : Expression
{
private readonly Expression _methodExpression;
private readonly Expression[] _parameters;
public CallExpression(TokenPosition position, Expression methodExpression, Expression[] parameters) : base(position)
{
_methodExpression = methodExpression;
_parameters = parameters;
}
public override ValueExpression Evaluate(IParserContext context)
{
object methodObject = _methodExpression.Evaluate(context).Value;
ValueExpression[] parameters = EvaluateExpressionArray(_parameters, context);
Type[] parameterTypes = Array.ConvertAll(parameters, expr => expr.Type);
object[] parameterValues = Array.ConvertAll(parameters, expr => expr.Value);
if (methodObject is MethodDefinition)
{
Type returnType;
return Exp.Value(TokenPosition, ((MethodDefinition)methodObject).Invoke(parameterTypes, parameterValues, out returnType), returnType);
}
if (methodObject is ConstructorInfo[])
{
ConstructorInfo[] constructors = (ConstructorInfo[]) methodObject;
MethodBase method = new LazyBinder().SelectMethod(BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance, constructors, parameterTypes, null);
if (method == null)
throw new ExpressionEvaluationException("No match found for constructor " + constructors[0].Name, this);
object value = ((ConstructorInfo)method).Invoke(parameterValues);
return Exp.Value(TokenPosition, value, method.ReflectedType);
}
if (methodObject is Delegate[])
{
Delegate[] delegates = (Delegate[]) methodObject;
MethodBase[] methods = Array.ConvertAll<Delegate, MethodBase>(delegates, d => d.Method);
MethodBase method = new LazyBinder().SelectMethod(BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance, methods, parameterTypes, null);
if (method == null)
throw new ExpressionEvaluationException("No match found for delegate " + _methodExpression, this);
object value = method.Invoke(delegates[Array.IndexOf(methods, method)].Target, parameterValues);
return Exp.Value(TokenPosition, value, ((MethodInfo)method).ReturnType);
}
if (methodObject is Delegate)
{
Delegate method = (Delegate) methodObject;
object value = method.Method.Invoke(method.Target, parameterValues);
return new ValueExpression(TokenPosition, value, method.Method.ReturnType);
}
throw new ExpressionEvaluationException(_methodExpression + " is not a function", this);
}
public override string ToString()
{
string[] parameters = Array.ConvertAll(_parameters, expr => expr.ToString());
return "(" + _methodExpression + "(" + String.Join(",", parameters) + "))";
}
}
}
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