private void Parse(NewArrayExpression expr)
{
var exps = expr.Expressions;
var length = expr.Expressions.Count;
var arr = Array.CreateInstance(expr.Type.GetElementType(), length);
for (int i = 0; i < length; i++)
{
Parse(exps[i]);
if (_state.DustType != DustType.Sql)
{
arr.SetValue(_state.Object, i);
}
else
{
var arr1 = new ISawDust[length];
var dust = GetSawDust();
if (i > 0)
{
_state.Object = arr.GetValue(0);
arr1[0] = new SawDust(this, _state.DustType, arr.GetValue(0));
for (int j = 1; j < i; j++)
{
arr1[j] = new SawDust(this, _state.DustType, arr.GetValue(j));
}
}
for (; i < length; i++)
{
Parse(exps[i]);
arr1[i] = GetSawDust();
}
_state.Array = arr1;
return;
}
}
_state.Array = arr;
}
/// <summary> 解析方法,如果全部是常量,则直接执行
/// </summary>
/// <param name="expr">方法表达式</param>
/// <param name="target">方法的调用实例</param>
/// <param name="args">方法参数</param>
/// <returns></returns>
private bool TryInvoke(MethodCallExpression expr, out ISawDust target, out ISawDust[] args)
{
ISubExpression subexpr = null;
//判断方法调用实例,如果是null为静态方法,反之为实例方法
if (expr.Object == null)
{
target = new SawDust(this, DustType.Object, null);
}
else
{
Parse(expr.Object);
if (_state.DustType == DustType.SubExpression) subexpr = _state.SubExpression;
target = GetSawDust();
}
var exprArgs = expr.Arguments;
var length = exprArgs.Count;
args = new ISawDust[length];
var call = target.Type != DustType.Sql;
for (int i = 0; i < length; i++)
{
Parse(exprArgs[i]);
if (_state.DustType == DustType.Sql)
{
if (call) call = false;
args[i] = new SawDust(this, DustType.Sql, _state.Sql);
}
else if (_state.DustType == DustType.Array && _state.Array is ISawDust[])
{
if (call) call = false;
args[i] = new SawDust(this, DustType.Array, _state.Array);
}
else
{
args[i] = new SawDust(this, _state.DustType, _state.Object);
}
}
if (call)
{
var method = expr.Method;
if (subexpr != null && !TypesHelper.IsChild(typeof(ISubExpression), method.ReturnType))
{
_state.Sql = subexpr.GetSqlString(args);
}
else
{
_state.Object = method.Invoke(target.Value, args.Select(it => it.Value).ToArray());
}
return true;
}
else
{
return false;
}
}
