public static InvokeMethod CreateMethodExpression(IContainerContext containerContext, ResolutionTarget[] parameters, MethodInfo methodInfo)
{
var strategyParameter = Expression.Constant(containerContext.ResolutionStrategy, typeof(IResolutionStrategy));
var resolutionInfoParameter = Expression.Parameter(typeof(ResolutionInfo), "resolutionInfo");
var instanceParameter = Expression.Parameter(typeof(object), "instance");
var convertedInstance = Expression.Convert(instanceParameter, methodInfo.DeclaringType);
var arguments = CreateExpressionFromResolutionTargets(parameters, strategyParameter, resolutionInfoParameter);
var callExpression = Expression.Call(convertedInstance, methodInfo, arguments);
return Expression.Lambda<InvokeMethod>(callExpression, resolutionInfoParameter, instanceParameter).Compile();
}
public Expression GetExpressionForResolutionTarget(ResolutionTarget resolutionTarget, ResolutionInfo resolutionInfo, Expression resolutionInfoExpression)
{
return this.resolutionStrategy.GetExpressionForResolutionTarget(resolutionTarget, resolutionInfo, resolutionInfoExpression);
}
public object EvaluateResolutionTarget(ResolutionTarget resolutionTarget,
ResolutionInfo resolutionInfo)
{
return this.resolutionStrategy.EvaluateResolutionTarget(resolutionTarget, resolutionInfo);
}
private Expression CreateOverrideExpression(ResolutionTarget resolutionTarget, Expression resolutionInfoExpression)
{
var overrideManagerExpression = Expression.Property(resolutionInfoExpression, "OverrideManager");
var callExpression = Expression.Call(overrideManagerExpression, "GetOverriddenValue", null, Expression.Constant(resolutionTarget.TypeInformation));
return Expression.Convert(callExpression, resolutionTarget.TypeInformation.Type);
}
public Expression GetExpressionForResolutionTarget(ResolutionTarget resolutionTarget, ResolutionInfo resolutionInfo, Expression resolutionInfoExpression)
{
if (resolutionInfo.OverrideManager != null &&
resolutionInfo.OverrideManager.ContainsValue(resolutionTarget.TypeInformation))
return this.CreateOverrideExpression(resolutionTarget, resolutionInfoExpression);
return resolutionTarget.ResolutionTargetValue != null ? Expression.Constant(resolutionTarget.ResolutionTargetValue) :
resolutionTarget.Resolver.GetExpression(resolutionInfo, resolutionInfoExpression);
}
public object EvaluateResolutionTarget(ResolutionTarget resolutionTarget, ResolutionInfo resolutionInfo)
{
if (resolutionInfo.OverrideManager != null && resolutionInfo.OverrideManager.ContainsValue(resolutionTarget.TypeInformation))
return resolutionInfo.OverrideManager.GetOverriddenValue(resolutionTarget.TypeInformation);
return resolutionTarget.ResolutionTargetValue ?? resolutionTarget.Resolver.Resolve(resolutionInfo);
}
private static Expression CreateResolutionTargetExpression(ResolutionTarget resolutionTarget, Expression strategyParameter,
Expression resolutionInfoParameter)
{
var target = Expression.Constant(resolutionTarget, typeof(ResolutionTarget));
var evaluate = Expression.Call(strategyParameter, "EvaluateResolutionTarget", null, target, resolutionInfoParameter);
return Expression.Convert(evaluate, resolutionTarget.TypeInformation.Type);
}