/// <summary>
/// Uses the specified renderer to render this transform.
/// </summary>
/// <param name="renderer"></param>
/// <param name="options"></param>
/// <returns></returns>
public Statement[] Render(IRenderer renderer, RenderOptions options)
{
// filter changes according to options
var filteredChanges = CollectionUtils.Select(_changes, change => FilterChange(change, options));
// allow the renderer to modify the change set, and then sort the changes appropriately
filteredChanges = OrderChanges(renderer.PreFilter(filteredChanges));
var statements = new List<Statement>();
foreach (var change in filteredChanges)
{
statements.AddRange(change.GetStatements(renderer));
}
return statements.ToArray();
}
/// <summary>
/// Determines whether specified change should be included in rendering based on specified options.
/// </summary>
/// <param name="change"></param>
/// <param name="options"></param>
/// <returns></returns>
private static bool FilterChange(RelationalModelChange change, RenderOptions options)
{
if (options.SuppressForeignKeys)
{
if (change is AddForeignKeyChange || change is DropForeignKeyChange)
return false;
}
if (options.SuppressIndexes)
{
if (change is AddIndexChange || change is DropIndexChange)
return false;
}
if (options.SuppressUniqueConstraints)
{
if (change is AddUniqueConstraintChange || change is DropUniqueConstraintChange)
return false;
}
if (options.SuppressPrimaryKeys)
{
if (change is AddPrimaryKeyChange || change is DropPrimaryKeyChange)
return false;
}
return true;
}
