public static HqlBooleanExpression AsBooleanExpression(this HqlTreeNode node)
{
if (node is HqlDot)
{
return(new HqlBooleanDot(node.Factory, (HqlDot)node));
}
// TODO - nice error handling if cast fails
return((HqlBooleanExpression)node);
}
internal void AddChild(HqlTreeNode child)
{
if (child is HqlExpressionSubTreeHolder)
{
AddChildren(child.Children);
}
else
{
_children.Add(child);
_node.AddChild(child.AstNode);
}
}
internal void AddChild(HqlTreeNode child)
{
if (child is HqlDistinctHolder)
{
AddChildren(child.Children);
}
else
{
_children.Add(child);
_node.AddChild(child.AstNode);
}
}
internal static HqlExpression ToArithmeticExpression(this HqlTreeNode node)
{
var hqlBooleanExpression = node as HqlBooleanExpression;
if (hqlBooleanExpression != null)
{
var builder = new HqlTreeBuilder();
return(builder.Case(new[] { builder.When(hqlBooleanExpression, builder.True()) }, builder.False()));
}
return((HqlExpression)node);
}
public static HqlBooleanExpression AsBooleanExpression(this HqlTreeNode node)
{
var hqlDot = node as HqlDot;
if (hqlDot != null)
{
return(new HqlBooleanDot(hqlDot.Factory, hqlDot));
}
var hqlBooleanExpression = node as HqlBooleanExpression;
if (hqlBooleanExpression != null)
{
return(hqlBooleanExpression);
}
// TODO - nice error handling if cast fails
throw new NotSupportedException();
}
public static HqlBooleanExpression ToBooleanExpression(this HqlTreeNode node)
{
var hqlDot = node as HqlDot;
if (hqlDot != null)
{
return(new HqlBooleanDot(hqlDot.Factory, hqlDot));
}
var hqlBooleanExpression = node as HqlBooleanExpression;
if (hqlBooleanExpression != null)
{
return(hqlBooleanExpression);
}
var builder = new HqlTreeBuilder();
return(builder.Equality(node.AsExpression(), builder.True()));
}
public HqlJoin(IASTFactory factory, HqlTreeNode expression, HqlAlias @alias) : base(HqlSqlWalker.JOIN, "join", factory, expression, @alias)
{
}
private void ExecuteAddOrderBy(HqlTreeNode orderBy)
{
if (orderBy == null)
return;
if (!_root.NodesPreOrder.OfType<HqlOrderBy>().Any())
_root.As<HqlQuery>().AddChild(orderBy);
}
public void AddFromClause(HqlTreeNode from)
{
root.NodesPreOrder.Where(n => n is HqlFrom).First().AddChild(from);
}
public void AddSelectClause(HqlTreeNode select)
{
root.NodesPreOrder.Where(n => n is HqlSelectFrom).First().AddChild(select);
}
public void AddChild(int index, HqlTreeNode node)
{
_children.Insert(index, node);
_node.InsertChild(index, node.AstNode);
}
public HqlOrderBy(IASTFactory factory, HqlTreeNode expression, HqlDirection hqlDirection)
: base(HqlSqlWalker.ORDER, "", factory, expression,
hqlDirection == HqlDirection.Ascending ?
(HqlTreeNode)new HqlDirectionAscending(factory) : (HqlTreeNode)new HqlDirectionDescending(factory))
{
}
public HqlCount(IASTFactory factory, HqlTreeNode child)
: base(HqlSqlWalker.COUNT, "count", factory, child)
{
}
public static HqlExpression AsExpression(this HqlTreeNode node)
{
// TODO - nice error handling if cast fails
return((HqlExpression)node);
}
public HqlAnd(IASTFactory factory, HqlTreeNode left, HqlTreeNode right) : base(HqlSqlWalker.AND, "and", factory, left, right)
{
}
public HqlMin(IASTFactory factory, HqlTreeNode expression)
: base(HqlSqlWalker.AGGREGATE, "min", factory, expression)
{
}
public HqlAverage(IASTFactory factory, HqlTreeNode expression) : base(HqlSqlWalker.AGGREGATE, "avg", factory, expression)
{
}
public HqlCast(IASTFactory factory, HqlTreeNode expression, System.Type type) : base(HqlSqlWalker.METHOD_CALL, "method", factory)
{
AddChild(new HqlIdent(factory, "cast"));
AddChild(new HqlExpressionList(factory, expression, new HqlIdent(factory, type)));
}
public HqlAs(IASTFactory factory, HqlTreeNode expression, System.Type type) : base(HqlSqlWalker.AS, "as", factory, expression)
{
switch (System.Type.GetTypeCode(type))
{
case TypeCode.Int32:
AddChild(new HqlIdent(factory, "integer"));
break;
default:
throw new InvalidOperationException();
}
}
public HqlWhere(IASTFactory factory, HqlTreeNode expression)
: base(HqlSqlWalker.WHERE, "where", factory, expression)
{
}
internal void AddChild(HqlTreeNode child)
{
_children.Add(child);
_node.AddChild(child.AstNode);
}
public HqlRange Range(HqlTreeNode ident, HqlAlias alias)
{
return new HqlRange(_factory, ident, alias);
}
public HqlExpressionSubTreeHolder(IASTFactory factory, HqlTreeNode[] children) : base(int.MinValue, "expression sub-tree holder", factory, children)
{
}
public HqlIn(IASTFactory factory, HqlExpression itemExpression, HqlTreeNode source)
: base(HqlSqlWalker.IN, "in", factory, itemExpression)
{
AddChild(new HqlInList(factory, source));
}
public void AddFromClause(HqlTreeNode from)
{
_root.NodesPreOrder.OfType<HqlFrom>().First().AddChild(from);
}
public void AddSelectClause(HqlTreeNode select)
{
_root.NodesPreOrder.OfType<HqlSelectFrom>().First().AddChild(select);
}
public HqlIn(IASTFactory factory, HqlExpression itemExpression, HqlTreeNode source)
: base(HqlSqlWalker.IN, "in", factory, itemExpression)
{
AddChild(new HqlInList(factory, source));
}
public IntermediateHqlTree(bool root)
{
_isRoot = root;
TreeBuilder = new HqlTreeBuilder();
_root = TreeBuilder.Query(TreeBuilder.SelectFrom(TreeBuilder.From()));
}
private void ExecuteAddOrderBy(HqlTreeNode orderBy)
{
if (orderBy == null)
return;
if (!_root.NodesPreOrder.Any(x => x == orderBy))
_root.AddChild(orderBy);
}
public HqlIn In(HqlExpression itemExpression, HqlTreeNode source)
{
return new HqlIn(_factory, itemExpression, source);
}
public HqlDistinctHolder(IASTFactory factory, HqlTreeNode[] children) : base(int.MinValue, "distinct holder", factory, children)
{
}
internal void AddChild(HqlTreeNode child)
{
if (child is HqlDistinctHolder)
{
AddChildren(child.Children);
}
else
{
_children.Add(child);
_node.AddChild(child.AstNode);
}
}
public HqlRange Range(HqlTreeNode ident, HqlAlias alias)
{
return(new HqlRange(_factory, ident, alias));
}
public HqlIn In(HqlExpression itemExpression, HqlTreeNode source)
{
return(new HqlIn(_factory, itemExpression, source));
}
public HqlInList(IASTFactory factory, HqlTreeNode source)
: base(HqlSqlWalker.IN_LIST, "inlist", factory, source)
{
}
public HqlInList(IASTFactory factory, HqlTreeNode source)
: base(HqlSqlWalker.IN_LIST, "inlist", factory, source)
{
}
private void DetectOuterExists()
{
if (_root is HqlExists)
{
_takeCount = TreeBuilder.Constant(1);
_root = Root.Children.First();
Expression<Func<IEnumerable<object>, bool>> x = l => l.Any();
_listTransformers.Add(x);
}
}
internal void AddChild(HqlTreeNode child)
{
if (child is HqlExpressionSubTreeHolder)
{
AddChildren(child.Children);
}
else
{
_children.Add(child);
_node.AddChild(child.AstNode);
}
}
public void SetRoot(HqlTreeNode newRoot)
{
_root = newRoot;
}
public HqlJoin Join(HqlTreeNode expression, HqlAlias @alias)
{
return new HqlJoin(_factory, expression, @alias);
}
public ExpressionToHqlTranslationResults(HqlTreeNode statement,
IList<LambdaExpression> itemTransformers,
IList<LambdaExpression> listTransformers,
IList<LambdaExpression> postExecuteTransformers,
List<Action<IQuery, IDictionary<string, Tuple<object, IType>>>> additionalCriteria)
{
Statement = statement;
PostExecuteTransformer = MergeLambdasAndCompile(postExecuteTransformers);
var itemTransformer = MergeLambdasAndCompile(itemTransformers);
var listTransformer = MergeLambdasAndCompile(listTransformers);
if (itemTransformer != null || listTransformer != null)
{
ResultTransformer = new ResultTransformer(itemTransformer, listTransformer);
}
AdditionalCriteria = additionalCriteria;
}
