private void MemberExpression(
MemberInfo memberInfo,
Expression instanceExpr,
List<ParameterExpression> locals,
Dictionary<int, ParameterExpression> typedVars,
Dictionary<string, ParameterExpression> namedVars,
List<Expression> creations)
{
var fieldInfo = memberInfo as FieldInfo;
var propInfo = memberInfo as PropertyInfo;
if (fieldInfo != null)
{
var item = this.InternalFindDependence(fieldInfo.FieldType) ?? this.InternalFindDependence(fieldInfo.Name);
if (item == null)
{
return;
}
var itemGenerator = new InstanceFactoryGenerator(item);
var valueExpr = itemGenerator.ValueExpression(locals, typedVars, namedVars, creations);
if (valueExpr != null) {
var assignExpr = Expression.Assign(Expression.Field(instanceExpr, fieldInfo), valueExpr);
creations.Add(assignExpr);
item.Changed += (sender, e) => this.Injection.ResetInstanceFactory();
}
}
if (propInfo != null && propInfo.CanWrite)
{
var item = this.InternalFindDependence(propInfo.PropertyType) ?? this.InternalFindDependence(propInfo.Name);
if (item == null)
{
return;
}
var itemGenerator = new InstanceFactoryGenerator(item);
var valueExpr = itemGenerator.ValueExpression(locals, typedVars, namedVars, creations,propInfo.PropertyType);
if (valueExpr != null) {
var assignExpr = Expression.Assign(Expression.Property(instanceExpr, propInfo), valueExpr);
creations.Add(assignExpr);
item.Changed += (sender, e) => this.Injection.ResetInstanceFactory();
}
}
}
private Expression NewExpression(
ConstructorInfo ctor,
List<ParameterExpression> locals,
Dictionary<int, ParameterExpression> typedVars,
Dictionary<string, ParameterExpression> namedVars,
List<Expression> creations)
{
var parameters = ctor.GetParameters();
var paramExpressions = new List<Expression>();
foreach (var parameterInfo in parameters)
{
var item = this.InternalFindDependence(parameterInfo.Name) ?? this.InternalFindDependence(parameterInfo.ParameterType.FullName);
if (item == null)
{
if (parameterInfo.HasDefaultValue)
{
paramExpressions.Add(Expression.Constant(parameterInfo.DefaultValue, parameterInfo.ParameterType));
}
else
{
throw new Exception("The parameter [" + parameterInfo.Name + "] of [" + ctor.DeclaringType.FullName + "] was not defined default value and can not be found in inject context.");
}
}
else
{
var itemGenerator = new InstanceFactoryGenerator(item);
var instanceExpr = itemGenerator.ValueExpression(locals, typedVars, namedVars, creations,parameterInfo.ParameterType);
paramExpressions.Add(instanceExpr);
item.Changed += (sender, e) => this.Injection.ResetInstanceFactory();
}
}
return Expression.New(ctor, paramExpressions);
}
