static ResultElement CreateResultElement(Type type)
{
//TODO init _resultElement
ResultElement resultElement = new ResultElement();
TypeDescriptor typeDescriptor = TypeDescriptor.GetDescriptor(type);
string alias = resultElement.GenerateUniqueTableAlias(typeDescriptor.Table.Name);
resultElement.FromTable = CreateRootTable(typeDescriptor.Table, alias);
MappingObjectExpression moe = new MappingObjectExpression(typeDescriptor.EntityType.GetConstructor(Type.EmptyTypes));
DbTableSegment tableExp = resultElement.FromTable.Table;
DbTable table = new DbTable(alias);
foreach (MappingMemberDescriptor item in typeDescriptor.MappingMemberDescriptors.Values)
{
DbColumnAccessExpression columnAccessExpression = new DbColumnAccessExpression(table, item.Column);
moe.AddMemberExpression(item.MemberInfo, columnAccessExpression);
if (item.IsPrimaryKey)
{
moe.PrimaryKey = columnAccessExpression;
}
}
resultElement.MappingObjectExpression = moe;
return(resultElement);
}
static ResultElement CreateResultElement(Type type, string explicitTableName)
{
if (type.IsAbstract || type.IsInterface)
{
throw new ArgumentException("The type of input can not be abstract class or interface.");
}
//TODO init _resultElement
ResultElement resultElement = new ResultElement();
TypeDescriptor typeDescriptor = TypeDescriptor.GetDescriptor(type);
DbTable dbTable = typeDescriptor.Table;
if (explicitTableName != null)
{
dbTable = new DbTable(explicitTableName, dbTable.Schema);
}
string alias = resultElement.GenerateUniqueTableAlias(dbTable.Name);
resultElement.FromTable = CreateRootTable(dbTable, alias);
ConstructorInfo constructor = typeDescriptor.EntityType.GetConstructor(Type.EmptyTypes);
if (constructor == null)
{
throw new ArgumentException(string.Format("The type of '{0}' does't define a none parameter constructor.", type.FullName));
}
MappingObjectExpression moe = new MappingObjectExpression(constructor);
DbTableSegment tableExp = resultElement.FromTable.Table;
DbTable table = new DbTable(alias);
foreach (MappingMemberDescriptor item in typeDescriptor.MappingMemberDescriptors.Values)
{
DbColumnAccessExpression columnAccessExpression = new DbColumnAccessExpression(table, item.Column);
moe.AddMappingMemberExpression(item.MemberInfo, columnAccessExpression);
if (item.IsPrimaryKey)
{
moe.PrimaryKey = columnAccessExpression;
}
}
resultElement.MappingObjectExpression = moe;
return(resultElement);
}
public override JoinQueryResult Visit(RootQueryExpression exp)
{
Type type = exp.ElementType;
TypeDescriptor typeDescriptor = TypeDescriptor.GetDescriptor(type);
string explicitTableName = exp.ExplicitTable;
DbTable dbTable = typeDescriptor.Table;
if (explicitTableName != null)
{
dbTable = new DbTable(explicitTableName, dbTable.Schema);
}
string alias = this._resultElement.GenerateUniqueTableAlias(dbTable.Name);
DbTableSegment tableSeg = CreateTableExpression(dbTable, alias);
MappingObjectExpression moe = new MappingObjectExpression(typeDescriptor.EntityType.GetConstructor(Type.EmptyTypes));
DbTable table = new DbTable(alias);
foreach (MappingMemberDescriptor item in typeDescriptor.MappingMemberDescriptors.Values)
{
DbColumnAccessExpression columnAccessExpression = new DbColumnAccessExpression(table, item.Column);
moe.AddMemberExpression(item.MemberInfo, columnAccessExpression);
if (item.IsPrimaryKey)
{
moe.PrimaryKey = columnAccessExpression;
}
}
//TODO 解析 on 条件表达式
DbExpression condition = null;
List <IMappingObjectExpression> moeList = new List <IMappingObjectExpression>(this._moeList.Count + 1);
moeList.AddRange(this._moeList);
moeList.Add(moe);
condition = GeneralExpressionVisitor.ParseLambda(this._conditionExpression, moeList);
DbJoinTableExpression joinTable = new DbJoinTableExpression(this._joinType, tableSeg, condition);
JoinQueryResult result = new JoinQueryResult();
result.MappingObjectExpression = moe;
result.JoinTable = joinTable;
return(result);
}
public override JoinQueryResult Visit(RootQueryExpression exp)
{
Type type = exp.ElementType;
TypeDescriptor typeDescriptor = EntityTypeContainer.GetDescriptor(type);
string explicitTableName = exp.ExplicitTable;
DbTable dbTable = typeDescriptor.Table;
if (explicitTableName != null)
{
dbTable = new DbTable(explicitTableName, dbTable.Schema);
}
string alias = this._resultElement.GenerateUniqueTableAlias(dbTable.Name);
DbTableSegment tableSeg = CreateTableSegment(dbTable, alias, exp.Lock);
MappingObjectExpression moe = new MappingObjectExpression(typeDescriptor.Definition.Type.GetConstructor(Type.EmptyTypes));
DbTable table = new DbTable(alias);
foreach (PropertyDescriptor item in typeDescriptor.PropertyDescriptors)
{
DbColumnAccessExpression columnAccessExpression = new DbColumnAccessExpression(table, item.Column);
moe.AddMappingMemberExpression(item.Property, columnAccessExpression);
if (item.IsPrimaryKey)
{
moe.PrimaryKey = columnAccessExpression;
}
}
//TODO 解析 on 条件表达式
var scopeParameters = this._scopeParameters.Clone(this._conditionExpression.Parameters.Last(), moe);
DbExpression condition = GeneralExpressionParser.Parse(this._conditionExpression, scopeParameters, this._resultElement.ScopeTables);
DbJoinTableExpression joinTable = new DbJoinTableExpression(this._joinType.AsDbJoinType(), tableSeg, condition);
JoinQueryResult result = new JoinQueryResult();
result.MappingObjectExpression = moe;
result.JoinTable = joinTable;
return(result);
}
protected override IMappingObjectExpression VisitNew(NewExpression exp)
{
IMappingObjectExpression result = new MappingObjectExpression(exp.Constructor);
ParameterInfo[] parames = exp.Constructor.GetParameters();
for (int i = 0; i < parames.Length; i++)
{
ParameterInfo pi = parames[i];
Expression argExp = exp.Arguments[i];
if (MappingTypeSystem.IsMappingType(pi.ParameterType))
{
DbExpression dbExpression = this.ResolveExpression(argExp);
result.AddMappingConstructorParameter(pi, dbExpression);
}
else
{
IMappingObjectExpression subResult = this.Visit(argExp);
result.AddComplexConstructorParameter(pi, subResult);
}
}
return(result);
}
