public override HqlTreeNode BuildHql(MethodInfo method, Expression targetObject, ReadOnlyCollection<Expression> arguments, HqlTreeBuilder treeBuilder, IHqlExpressionVisitor visitor)
{
string leadingOrTrailing = "TRAILING";
if (method.Name == "TrimLeading")
leadingOrTrailing = "LEADING";
return treeBuilder.MethodCall("Trim",
treeBuilder.Ident(leadingOrTrailing),
visitor.Visit(arguments[1]).AsExpression(),
treeBuilder.Ident("FROM"),
visitor.Visit(arguments[0]).AsExpression());
}
public override HqlTreeNode BuildHql(MethodInfo method, Expression targetObject,
ReadOnlyCollection<Expression> arguments, HqlTreeBuilder treeBuilder, IHqlExpressionVisitor visitor)
{
// There is a problem with NHibernate when an identifier matches an entity's name. The resulting
// SQL may be null in that situation. The searchTable's name is split in 2 identifiers to mitigate the problem.
string searchTable = (string)((ConstantExpression)arguments[2]).Value;
var searchTableFullName = searchTable.Split('.');
if (searchTableFullName.Length != 2)
throw new FrameworkException("FullTextSearch table name '" + searchTable + "' must have format 'schema.table'.");
string searchColumns = (string)((ConstantExpression)arguments[3]).Value;
var parameters = new HqlExpression[]
{
visitor.Visit(arguments[0]).AsExpression(),
visitor.Visit(arguments[1]).AsExpression(),
treeBuilder.Ident(searchTableFullName[0]),
treeBuilder.Ident(searchTableFullName[1]),
treeBuilder.Ident(searchColumns),
};
return treeBuilder.BooleanMethodCall("FullTextSearch", parameters);
}
public override HqlTreeNode BuildHql(MethodInfo method, Expression targetObject, ReadOnlyCollection<Expression> arguments, HqlTreeBuilder treeBuilder, IHqlExpressionVisitor visitor)
{
string trimWhere;
if (method.Name == "TrimStart")
trimWhere = "leading";
else if (method.Name == "TrimEnd")
trimWhere = "trailing";
else
trimWhere = "both";
string trimChars = "";
if (method.GetParameters().Length > 0)
foreach (char c in (char[])((ConstantExpression)arguments[0]).Value)
trimChars += c;
if (trimChars == "")
{
return treeBuilder.MethodCall("trim", treeBuilder.Ident(trimWhere), treeBuilder.Ident("from"), visitor.Visit(targetObject).AsExpression());
}
else
{
return treeBuilder.MethodCall("trim", treeBuilder.Ident(trimWhere), treeBuilder.Constant(trimChars), treeBuilder.Ident("from"), visitor.Visit(targetObject).AsExpression());
}
}