public Expression Remap(int offset, Dictionary <Expression, Expression> processedExpressions)
{
if (!CanRemap)
{
return(this);
}
Expression value;
if (processedExpressions.TryGetValue(this, out value))
{
return(value);
}
var mapping = new Segment <int>(Mapping.Offset + offset, Mapping.Length);
var result = new StructureExpression(PersistentType, mapping);
processedExpressions.Add(this, result);
var processedFields = Fields
.Select(f => f.Remap(offset, processedExpressions))
.Cast <PersistentFieldExpression>()
.ToList();
result.Fields = processedFields;
result.IsNullable = IsNullable;
return(result);
}
public static StructureExpression CreateLocalCollectionStructure(TypeInfo typeInfo, Segment <int> mapping)
{
if (!typeInfo.IsStructure)
{
throw new ArgumentException(string.Format(Strings.ExTypeXIsNotStructure, typeInfo.Name));
}
var result = new StructureExpression(typeInfo, mapping);
result.Fields = typeInfo.Fields
.Select(f => BuildNestedFieldExpression(f, mapping.Offset))
.ToList();
return(result);
}
public Expression RemoveOuterParameter(Dictionary <Expression, Expression> processedExpressions)
{
Expression value;
if (processedExpressions.TryGetValue(this, out value))
{
return(value);
}
var result = new StructureExpression(PersistentType, Mapping);
processedExpressions.Add(this, result);
var processedFields = Fields
.Select(f => f.RemoveOuterParameter(processedExpressions))
.Cast <PersistentFieldExpression>()
.ToList();
result.Fields = processedFields;
return(result);
}
public Expression Remap(int[] map, Dictionary <Expression, Expression> processedExpressions)
{
if (!CanRemap)
{
return(this);
}
Expression value;
if (processedExpressions.TryGetValue(this, out value))
{
return(value);
}
var result = new StructureExpression(PersistentType, default(Segment <int>));
processedExpressions.Add(this, result);
var processedFields = Fields
.Select(f => f.Remap(map, processedExpressions))
.Where(f => f != null)
.Cast <PersistentFieldExpression>()
.ToList();
if (processedFields.Count == 0)
{
processedExpressions[this] = null;
return(null);
}
var length = processedFields.Select(f => f.Mapping.Offset).Distinct().Count();
var offset = processedFields.Min(f => f.Mapping.Offset);
result.Mapping = new Segment <int>(offset, length);
result.Fields = processedFields;
result.IsNullable = IsNullable;
return(result);
}
