/// <summary>
/// Adds a key/value pair to the <see cref="T:System.Collections.Generic.IDictionary`2"/> if the key does not already exist.
/// </summary>
/// <param name="key">The key of the element to add.</param>
/// <param name="value">The value to be added, if the key does not already exist.</param>
/// <exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.IDictionary`2"/> is read-only.</exception>
public TValue GetOrAdd(TKey key, TValue value)
{
FetchValue ii = new FetchValue(value);
AddEntry(key, ref ii);
return(ii.Value);
}
/// <summary>
/// Compiles the fragment.
/// </summary>
/// <param name="queryBuilder">The query builder.</param>
/// <param name="engine">The engine.</param>
public virtual void Compile(QueryBuilder queryBuilder, IEngine engine)
{
if (!engine.Options.TopSupported)
{
throw new ClauseNotSupportedException("Top clause is not supported in this engine.");
}
queryBuilder.Write("TOP(");
if (engine.Options.TopAsParameters || FetchValue is IQueryFragment)
{
queryBuilder.WriteValue(FetchValue);
}
else
{
queryBuilder.Write(FetchValue.ToString());
}
queryBuilder.Write(")");
if (PercentValue)
{
queryBuilder.Write(" PERCENT");
}
if (WithTiesValue)
{
queryBuilder.Write(" WITH TIES");
}
}
/// <summary>
/// Adds an element with the provided key and value to the <see cref="T:System.Collections.Generic.IDictionary`2"/>.
/// </summary>
public bool TryAdd(TKey key, TValue value)
{
FetchValue ii = new FetchValue(value);
return(InsertResult.Inserted == AddEntry(key, ref ii));
}
