|
public FindLambdaContext ( string parameterName ) : |
||
| parameterName | string | |
| return | ||
public override Expression MemberExpression(MemberExpression expression)
{
var type = _persistentClass;
MappedClassMetadata mappedClass = null;
var members = expression.Members;
var lastAliasName = _rootAlias;
// If we are inside a lambda expression
if (_context.ExpressionLevel > 1)
{
// Lambda member expression MUST start with a variable name
var lambdaContext = _context.FindLambdaContext(members[0].Name);
if (lambdaContext == null)
{
throw new QueryException(ErrorMessages.Expression_LambdaMemberMustStartWithParameter);
}
type = lambdaContext.ParameterType;
lastAliasName = lambdaContext.ParameterAlias;
members = members.Skip(1).ToList();
}
else if (members[0].Name == "$it")
{
// Special case: $it variable outside of lambda expression
members = members.Skip(1).ToList();
}
if (type != null)
{
_context.SessionFactoryContext.MappedClassMetadata.TryGetValue(type, out mappedClass);
}
if (members.Count == 1)
{
Debug.Assert(members[0].IdExpression == null);
string resolvedName = ResolveName(mappedClass, string.Empty, members[0].Name, ref type);
if (string.IsNullOrEmpty(resolvedName))
{
/**
* 01.06.2020: Throwing exception moved from "ResolveName" to here.
*/
throw new QueryException(String.Format(
ErrorMessages.Resolve_CannotResolveName, members[0].Name, type)
);
}
return(new ResolvedMemberExpression(
expression.MemberType,
(lastAliasName != null ? lastAliasName + "." : null) + resolvedName,
type
));
}
var sb = new StringBuilder();
var typeIsMapped = false;
var baseTypeIsMapped = false;
for (int i = 0; i < members.Count; i++)
{
var member = members[i];
Debug.Assert(member.IdExpression == null);
bool isLastMember = i == members.Count - 1;
string resolvedName = ResolveName(mappedClass, sb.ToString(), member.Name, ref type);
/**
* 01.06.2020: If the name could not be resolved, then perhaps the type is not mapped? Check whether the type is in our
* dictionary of "base type to inherited mapping" and try it again with the type of the mappec class.
*/
if (string.IsNullOrEmpty(resolvedName))
{
typeIsMapped = _context.SessionFactoryContext.MappedClassMetadata.ContainsKey(type);
baseTypeIsMapped = _context.SessionFactoryContext.BaseClassToMappedClass.ContainsKey(type);
if (!typeIsMapped && baseTypeIsMapped)
{
type = _context.SessionFactoryContext.BaseClassToMappedClass[type];
}
resolvedName = ResolveName(mappedClass, sb.ToString(), member.Name, ref type);
if (string.IsNullOrEmpty(resolvedName))
{
throw new QueryException(String.Format(
ErrorMessages.Resolve_CannotResolveName, members[0].Name, type)
);
}
}
if (sb.Length > 0)
{
sb.Append('.');
}
sb.Append(resolvedName);
/**
* 01.06.2020: If type is not mapped, check whether the type is the base class of a mapped class.
* SessionFactory was extended to hold a dictionary with base type (key) and mapped class type (value). The dictionary will be used
* during building ICriteria if searched type is not mapped, but exists as key in this dictionary. This behavior is required if base
* controller classes are used and model classes are overwritten and the inherited models are mapped. If the base model are queried
* and filtered by name of referenced type, then the OData.nHibernate cannot find the mapping. With the new dictionary the mapping can be found.
*/
typeIsMapped = _context.SessionFactoryContext.MappedClassMetadata.ContainsKey(type);
baseTypeIsMapped = _context.SessionFactoryContext.BaseClassToMappedClass.ContainsKey(type);
if (type != null && (typeIsMapped || baseTypeIsMapped) && !isLastMember)
{
if (typeIsMapped)
{
mappedClass = _context.SessionFactoryContext.MappedClassMetadata[type];
}
else if (baseTypeIsMapped)
{
mappedClass = _context.SessionFactoryContext.MappedClassMetadata[_context.SessionFactoryContext.BaseClassToMappedClass[type]];
}
string path = (lastAliasName != null ? lastAliasName + "." : null) + sb;
Alias alias;
if (!Aliases.TryGetValue(path, out alias))
{
alias = new Alias(_context.CreateUniqueAliasName(), path, type);
Aliases.Add(path, alias);
_context.AddAlias(alias);
}
lastAliasName = alias.Name;
sb.Clear();
}
}
return(new ResolvedMemberExpression(
expression.MemberType,
(lastAliasName != null ? lastAliasName + "." : null) + sb,
type
));
}
public override Expression MemberExpression(MemberExpression expression)
{
var type = _persistentClass;
MappedClassMetadata mappedClass = null;
var members = expression.Members;
var lastAliasName = _rootAlias;
// If we are inside a lambda expression
if (_context.ExpressionLevel > 1)
{
// Lambda member expression MUST start with a variable name
var lambdaContext = _context.FindLambdaContext(members[0].Name);
if (lambdaContext == null)
{
throw new QueryException(ErrorMessages.Expression_LambdaMemberMustStartWithParameter);
}
type = lambdaContext.ParameterType;
lastAliasName = lambdaContext.ParameterAlias;
members = members.Skip(1).ToList();
}
else if (members[0].Name == "$it")
{
// Special case: $it variable outside of lambda expression
members = members.Skip(1).ToList();
}
if (type != null)
{
_context.SessionFactoryContext.MappedClassMetadata.TryGetValue(type, out mappedClass);
}
if (members.Count == 1)
{
Debug.Assert(members[0].IdExpression == null);
string resolvedName = ResolveName(mappedClass, string.Empty, members[0].Name, ref type);
return(new ResolvedMemberExpression(
expression.MemberType,
(lastAliasName != null ? lastAliasName + "." : null) + resolvedName,
type
));
}
var sb = new StringBuilder();
for (int i = 0; i < members.Count; i++)
{
var member = members[i];
Debug.Assert(member.IdExpression == null);
bool isLastMember = i == members.Count - 1;
string resolvedName = ResolveName(mappedClass, sb.ToString(), member.Name, ref type);
if (sb.Length > 0)
{
sb.Append('.');
}
sb.Append(resolvedName);
if (type != null && _context.SessionFactoryContext.MappedClassMetadata.ContainsKey(type) && !isLastMember)
{
mappedClass = _context.SessionFactoryContext.MappedClassMetadata[type];
string path = (lastAliasName != null ? lastAliasName + "." : null) + sb;
Alias alias;
if (!Aliases.TryGetValue(path, out alias))
{
alias = new Alias(_context.CreateUniqueAliasName(), path, type);
Aliases.Add(path, alias);
_context.AddAlias(alias);
}
lastAliasName = alias.Name;
sb.Clear();
}
}
return(new ResolvedMemberExpression(
expression.MemberType,
(lastAliasName != null ? lastAliasName + "." : null) + sb,
type
));
}