private Expression(string expressionString)
{
TkDebug.AssertArgumentNullOrEmpty(expressionString, "expressionString", null);
fParser = ExpressionParser.ParseExpression(expressionString);
TkDebug.ThrowIfNoGlobalVariable();
PlugInFactoryManager factories = BaseGlobalVariable.Current.FactoryManager;
BasePlugInFactory paramFactory = factories.GetCodeFactory(
ParamExpressionPlugInFactory.REG_NAME);
BasePlugInFactory exprFactory = factories.GetCodeFactory(
ExpressionPlugInFactory.REG_NAME);
fExpressions = new List <BaseExpressionItem>();
foreach (string item in fParser.ParamArray)
{
string firstChar = item[0].ToString();
BaseExpressionItem expressionItem;
if (paramFactory.Contains(firstChar))
{
IParamExpression expression = paramFactory.CreateInstance <IParamExpression>(firstChar);
string parameter = item.Substring(1);
expressionItem = new ParamExpressionItem(expression, parameter);
}
else
{
IExpression expression = exprFactory.CreateInstance <IExpression>(item);
expressionItem = new ExpressionItem(expression, item);
}
fExpressions.Add(expressionItem);
}
}
/// <summary>
/// Initializes a new instance of the ParamExpressionItem class.
/// </summary>
/// <param name="expression"></param>
/// <param name="parameter"></param>
public ParamExpressionItem(IParamExpression expression, string parameter)
{
fExpression = expression;
Name = parameter;
fAttribute = Attribute.GetCustomAttribute(expression.GetType(),
typeof(ParamExpressionAttribute)) as ParamExpressionAttribute;
TkDebug.AssertNotNull(fAttribute, string.Format(ObjectUtil.SysCulture,
"此处错误不该发生，因为插件{0}应该附着了相应的Attribute", expression.GetType()), expression);
SqlInject = fAttribute.SqlInject;
}
