public bool TryPeek(out IFragmentTarget target)
{
if (this.Targets.Count == 0)
{
target = default(IFragmentTarget);
return(false);
}
target = this.Targets.Peek();
return(true);
}
public static byte GetPriority(IFragmentTarget target)
{
var priority = default(byte);
if (!Priorities.TryGetValue(target.FragmentType, out priority))
{
throw new NotImplementedException();
}
return(priority);
}
protected virtual void WriteAssociativeExpression(IFragmentTarget target)
{
var writer = this.Peek as ISqlQueryWriter;
if (writer == null)
{
throw new NotImplementedException();
}
writer.Builder.Append(target.CommandText);
}
protected virtual bool IsAssociativeExpression(IFragmentTarget target)
{
var writer = target as ISqlQueryWriter;
if (writer == null)
{
return(false);
}
return(writer.GetRenderContext().HasFlag(RenderHints.AssociativeExpression));
}
protected virtual void ImportConstants(IFragmentTarget target)
{
foreach (var key in target.Constants.Keys)
{
var value = target.Constants[key];
if (value != null)
{
var type = value.GetType();
if (!type.IsScalar())
{
throw new InvalidOperationException(string.Format("Constant with name \"{0}\" has invalid type \"{1}\".", key, type.FullName));
}
}
this.Constants[key] = target.Constants[key];
}
}
public SqlServerQueryFragment(IFragmentTarget target)
: base(target)
{
}
public SQLiteQueryFragment(IFragmentTarget target) : base(target)
{
}
protected override SqlQueryFragment CreateQueryFragment(IFragmentTarget target)
{
return(new SQLiteQueryFragment(target));
}
public SqlCeQueryFragment(IFragmentTarget target)
: base(target)
{
}
public SqlQueryFragment(IFragmentTarget target)
: this(target.CommandText, GetPriority(target))
{
}
public IFragmentTarget Push(IFragmentTarget target)
{
this.Targets.Push(target);
return(target);
}
protected abstract SqlQueryFragment CreateQueryFragment(IFragmentTarget target);
