public static IManagedProperty Find(this ManagedPropertyList list, string property, bool ignoreCase)
{
if (ignoreCase)
{
for (int i = 0, c = list.Count; i < c; i++)
{
var item = list[i];
if (item.Name.EqualsIgnoreCase(property))
{
return(item);
}
}
return(null);
}
return(list.Find(property));
}
private IConstraint CreatePropertyConstraint(string property, string comparison, string value)
{
var mp = _properties.Find(property, true);
if (mp == null)
{
throw new InvalidProgramException(string.Format("查询条件解析出错，没有找到名称为 {0} 的属性。", property));
}
var column = _mainTable.Column(mp);
var op = PropertyOperator.Equal;
switch (comparison.ToLower())
{
case "eq":
op = PropertyOperator.Equal;
break;
case "ne":
op = PropertyOperator.NotEqual;
break;
case "gt":
op = PropertyOperator.Greater;
break;
case "ge":
op = PropertyOperator.GreaterEqual;
break;
case "lt":
op = PropertyOperator.Less;
break;
case "le":
op = PropertyOperator.LessEqual;
break;
default:
throw new NotSupportedException("不支持这个操作符：" + comparison + "。");
}
return(_f.Constraint(column, op, value));
}
private void DealConstraintWord(string part)
{
//part 表示列名
if (_column == null)
{
//可能使用了引用属性，例如表达式：User.Name eq 'huqf'
var properties = part.Split(new char[] { '.' }, StringSplitOptions.RemoveEmptyEntries);
if (properties.Length > 1)
{
ITableSource lastTable = _mainTable;
for (int i = 0; i < properties.Length; i++)
{
var property = properties[i];
var mp = lastTable.EntityRepository.EntityMeta.ManagedProperties.GetCompiledProperties().Find(property);
if (mp == null)
{
throw new InvalidProgramException(string.Format("查询条件解析出错，没有找到名称为 {0} 的属性。", property));
}
var refProperty = mp as IRefEntityProperty;
if (refProperty != null)
{
lastTable = _f.FindOrCreateJoinTable(_query, lastTable, refProperty);
}
else
{
_column = lastTable.Column(mp);
}
}
if (_column == null)
{
throw new InvalidProgramException(string.Format("{0} 查询条件出错：属性表达式不能以引用实体属性结尾。", part));
}
}
else
{
var mp = _properties.Find(part, true);
if (mp == null)
{
throw new InvalidProgramException(string.Format("查询条件解析出错，没有找到名称为 {0} 的属性。", part));
}
_column = _mainTable.Column(mp);
}
}
//part 表示操作符
else if (_comparison == null)
{
_comparison = part;
}
//part 表示值
else
{
var propertyConstraint = CreateColumnConstraint(_comparison, part);
if (_concat.HasValue && _current != null)
{
_current = _f.Binary(_current, _concat.Value, propertyConstraint);
_concat = null;
}
else
{
_current = propertyConstraint;
}
_column = null;
_comparison = null;
}
}
