/// <summary>
/// Initializes a new instance of the <see cref="ChildEnumerator"/> class.
/// This class is used to initialize the enumerator.
/// </summary>
/// <param name="childIterable">The referenced <see cref="ChildIterable"/> class.</param>
/// <param name="treeContext">The tree context, <see cref="ParserRuleContext"/>.</param>
internal ChildEnumerator(ChildIterable childIterable, ParserRuleContext treeContext)
{
this.childIterable = childIterable;
if (treeContext.children is null)
{
this.childIter = null;
this.Current = null;
this.index = -1;
}
else
{
this.childIter = treeContext.children.GetEnumerator();
}
}
/// <summary>
/// Initialize the <see cref="UserAgentGetChildrenVisitor"/> by the name and provided range.
/// </summary>
/// <param name="name">The name of the visitor based on the kind of node we need to iterate children.</param>
/// <param name="start">The start range.</param>
/// <param name="end">>The end range.</param>
private void Init(string name, int start, int end)
{
switch (name)
{
case UserAgentTreeFlattener.KEYVALUE:
this.childIterable = new ChildIterable(false, start, end, clazz => (
clazz is UserAgentParser.KeyValueContext ||
clazz is UserAgentParser.KeyWithoutValueContext ||
clazz is UserAgentParser.ProductNameKeyValueContext));
break;
case UserAgentTreeFlattener.PRODUCT:
this.childIterable = new ChildIterable(false, start, end, clazz => (
clazz is UserAgentParser.ProductContext ||
clazz is UserAgentParser.CommentProductContext ||
clazz is UserAgentParser.ProductNameNoVersionContext));
break;
case UserAgentTreeFlattener.UUID:
this.childIterable = new ChildIterable(false, start, end, clazz => (
clazz is UserAgentParser.UuIdContext ||
clazz is UserAgentParser.ProductNameUuidContext));
break;
case UserAgentTreeFlattener.BASE64:
this.childIterable = new ChildIterable(false, start, end, clazz => (
clazz is UserAgentParser.Base64Context));
break;
case UserAgentTreeFlattener.URL:
this.childIterable = new ChildIterable(false, start, end, clazz => (
clazz is UserAgentParser.SiteUrlContext ||
clazz is UserAgentParser.ProductNameUrlContext));
break;
case UserAgentTreeFlattener.EMAIL:
this.childIterable = new ChildIterable(false, start, end, clazz => (
clazz is UserAgentParser.EmailAddressContext ||
clazz is UserAgentParser.ProductNameEmailContext));
break;
case UserAgentTreeFlattener.TEXT:
this.childIterable = new ChildIterable(false, start, end, clazz => (
clazz is UserAgentParser.MultipleWordsContext ||
clazz is UserAgentParser.VersionWordsContext ||
clazz is UserAgentParser.EmptyWordContext ||
clazz is UserAgentParser.RootTextContext ||
clazz is UserAgentParser.KeyValueVersionNameContext));
break;
case UserAgentTreeFlattener.NAME:
this.childIterable = new ChildIterable(false, start, end, clazz => (
clazz is UserAgentParser.ProductNameContext));
break;
case UserAgentTreeFlattener.VERSION:
this.childIterable = new ChildIterable(true, start, end, clazz => (
clazz is UserAgentParser.ProductVersionContext ||
clazz is UserAgentParser.ProductVersionWithCommasContext ||
clazz is UserAgentParser.ProductVersionWordsContext ||
clazz is UserAgentParser.ProductVersionSingleWordContext));
break;
case UserAgentTreeFlattener.COMMENTS:
this.childIterable = new ChildIterable(true, start, end, clazz => (
clazz is UserAgentParser.CommentBlockContext));
break;
case UserAgentTreeFlattener.KEY:
this.childIterable = new ChildIterable(false, start, end, clazz => (
clazz is UserAgentParser.KeyNameContext));
break;
case UserAgentTreeFlattener.VALUE:
this.childIterable = new ChildIterable(false, start, end, clazz => (
clazz is UserAgentParser.UuIdContext ||
clazz is UserAgentParser.MultipleWordsContext ||
clazz is UserAgentParser.SiteUrlContext ||
clazz is UserAgentParser.EmailAddressContext ||
clazz is UserAgentParser.KeyValueVersionNameContext ||
clazz is UserAgentParser.KeyValueProductVersionNameContext));
break;
case UserAgentTreeFlattener.ENTRY:
this.childIterable = new ChildIterable(false, start, end, clazz => (
clazz is UserAgentParser.CommentEntryContext));
break;
default:
this.childIterable = new ChildIterable(false, start, end, clazz => false);
break;
}
}
