public IEnumerable <object> ToList <TReturn>(Expression <Func <TEntity, TReturn> > expression)
{
var code = expression.GetHashCode();
if (SelectHandler == null)
{
SelectHandler = SqlHandler.Select <TEntity>();
}
var type = typeof(TReturn);
if (!JoinExpressionMapping.Contains(code))
{
var nclass = NClass.DefaultDomain().Public();
StringBuilder script = new StringBuilder();
// 获取构造函数参数
var arguments = ((NewExpression)expression.Body).Arguments;
//获取匿名类成员
var members = ((NewExpression)expression.Body).Members;
var joinTypeFlagMapping = new Dictionary <Type, JoinTypeFlag>();
for (int i = 0; i < arguments.Count; i++)
{
// 方法类型参数
if (arguments[i].NodeType == ExpressionType.Call)
{
var methodExpression = (MethodCallExpression)arguments[i];
var methodDeclaringType = methodExpression.Method.DeclaringType;
if (methodDeclaringType.IsGenericType && methodDeclaringType.GetGenericTypeDefinition().Name.Contains("Join"))
{
var joinType = methodDeclaringType.GetGenericArguments()[0];
if (methodExpression.Arguments[0].NodeType == ExpressionType.Quote)
{
var quoteExpression = (UnaryExpression)methodExpression.Arguments[0];
if (quoteExpression.Operand.NodeType == ExpressionType.Lambda)
{
var lambdaExpression = (LambdaExpression)quoteExpression.Operand;
if (lambdaExpression.Body.NodeType == ExpressionType.MemberAccess)
{
var memberExpression = (MemberExpression)lambdaExpression.Body;
nclass.Property(item => item
.Public()
.Type(((PropertyInfo)memberExpression.Member).PropertyType)
.Name(memberExpression.Member.Name));
var definitionType = methodDeclaringType.GetGenericTypeDefinition();
if (definitionType == typeof(InnerJoin <>))
{
joinTypeFlagMapping[joinType] = JoinTypeFlag.Inner;
script.Append(InnerJoin.GetJoinScript(joinType));
}
else if (definitionType == typeof(LeftJoin <>))
{
joinTypeFlagMapping[joinType] = JoinTypeFlag.Left;
script.Append(LeftJoin.GetJoinScript(joinType));
}
else if (definitionType == typeof(RightJoin <>))
{
joinTypeFlagMapping[joinType] = JoinTypeFlag.Right;
script.Append(RightJoin.GetJoinScript(joinType));
}
script.Append($".\"{memberExpression.Member.Name}\" AS \"{members[i].Name}\",");
}
}
}
}
}
else if (arguments[i].NodeType == ExpressionType.MemberAccess)
{
var memberExpression = (MemberExpression)arguments[i];
nclass.Property(item => item
.Public()
.Type(((PropertyInfo)memberExpression.Member).PropertyType)
.Name(memberExpression.Member.Name));
script.Append($"a.\"{memberExpression.Member.Name}\",");
}
//JoinObjectCache<ISelect<T>, TReturn>.GetObjects = NDelegate.RandomDomain().Func<ISelect<T>, object>(builder.ToString());
}
if (script.Length > 1)
{
script.Length -= 1;
var joinScript = script.ToString();
JoinExpressionMapping = JoinExpressionMapping.Add(code);
var tempClass = nclass.GetType();
ProxyCaller <TEntity, TReturn> .Add(code, NDelegate
.DefaultDomain(item => item.LogSyntaxError())
.Func <ISelect <TEntity>, IEnumerable <object> >($"return arg.ToList<{tempClass.GetDevelopName()}>(\"{joinScript.Replace("\"","\\\"")}\");"));
var builder = new StringBuilder();
foreach (var item in joinTypeFlagMapping)
{
var joinFieldCache = OrmNavigate <TEntity> .JoinScriptMapping[item.Key];
string joinAlias = string.Empty;
switch (item.Value)
{
case JoinTypeFlag.Left:
joinAlias = LeftJoin.GetJoinScript(item.Key);
builder.Append($"obj.LeftJoin(\"");
break;
case JoinTypeFlag.Inner:
joinAlias = InnerJoin.GetJoinScript(item.Key);
builder.Append($"obj.InnerJoin(\"");
break;
case JoinTypeFlag.Right:
joinAlias = RightJoin.GetJoinScript(item.Key);
builder.Append($"obj.RightJoin(\"");
break;
default:
break;
}
var joinFieldScript = $"\"{item.Key.Name}\" AS {joinAlias} ON a.\"{joinFieldCache.src}\" = {joinAlias}.\"{joinFieldCache.dst}\"";
builder.Append(joinFieldScript.Replace("\"", "\\\""));
builder.AppendLine("\");");
}
//$"\"{typeof(TJoinEntity).Name}\" AS {InnerJoinHelper<TJoinEntity>.JoinAliasName} ON a.\"{srcFieldName}\" = {InnerJoinHelper<TJoinEntity>.JoinAliasName}.\"{destFieldName}\"")
JoinFiller <TEntity, TReturn> .Add(code, NDelegate
.DefaultDomain()
.Action <ISelect <TEntity> >(builder.ToString()));
}
}
JoinFiller <TEntity, TReturn> .HandlerSelect(code, SelectHandler);
return(ProxyCaller <TEntity, TReturn> .ToList(code, SelectHandler));
}
static void Main(string[] args)
{
DomainManagement.RegisterDefault <AssemblyDomain>();
//var @operator = FastMethodOperator.DefaultDomain();
//var actionDelegate = @operator
// .Param(typeof(string), "parameter")
// .Body("Console.WriteLine(parameter);")
// .Compile();
//actionDelegate.DynamicInvoke("HelloWorld!");
//var action = (Action<string>)actionDelegate;
//action("HelloWorld!");
//actionDelegate.DisposeDomain();
//起个类
NClass nClass = NClass.DefaultDomain();
nClass
.Namespace("MyNamespace")
.Public()
.Name("MyClass")
.Ctor(ctor => ctor.Public().Body("MyField=\"Hello\";"))
.Property(prop => prop
.Type(typeof(string))
.Name("MyProperty")
.Public()
.OnlyGetter("return \"World!\";")
);
//添加方法
MethodBuilder mb = new MethodBuilder();
mb
.Public()
.Override()
.Name("ToString")
.Body("return MyField+\" \"+MyProperty;")
.Return(typeof(string));
nClass.Method(mb);
//添加字段
FieldBuilder fb = nClass.GetFieldBuilder();
fb.Public()
.Name("MyField")
.Type <string>();
//动态调用动态创建的类
var action = NDelegate
.RandomDomain()
.Action("Console.WriteLine((new MyClass()).ToString());", nClass.GetType());
action();
action.DisposeDomain();
//Console.WriteLine(typeof(List<int>[]).GetRuntimeName());
//Console.WriteLine(typeof(List<int>[,]).GetRuntimeName());
//Console.WriteLine(typeof(int[,]).GetRuntimeName());
//Console.WriteLine(typeof(int[][]).GetRuntimeName());
//Console.WriteLine(typeof(int[][,,,]).GetRuntimeName());
Console.ReadKey();
}