public virtual ICharSequence Escape(ICharSequence text, CultureInfo locale, EscapeQuerySyntaxType type)
{
if (text == null || text.Length == 0)
{
return(text);
}
// escape wildcards and the escape char (this has to be perform before
// anything else)
// since we need to preserve the UnescapedCharSequence and escape the
// original escape chars
if (text is UnescapedCharSequence)
{
text = ((UnescapedCharSequence)text).ToStringEscaped(wildcardChars);
}
else
{
text = new UnescapedCharSequence(text).ToStringEscaped(wildcardChars);
}
if (type == EscapeQuerySyntaxType.STRING)
{
return(EscapeQuoted(text, locale));
}
else
{
return(EscapeTerm(text, locale));
}
}
protected override IQueryNode PostProcessNode(IQueryNode node)
{
if (node is WildcardQueryNode)
{
WildcardQueryNode wildcardNode = (WildcardQueryNode)node;
if (wildcardNode.Text.Length > 0)
{
// Validate if the wildcard was escaped
if (UnescapedCharSequence.WasEscaped(wildcardNode.Text, 0))
{
return(node);
}
switch (wildcardNode.Text[0])
{
case '*':
case '?':
throw new QueryNodeException(new Message(
QueryParserMessages.LEADING_WILDCARD_NOT_ALLOWED, node
.ToQueryString(new EscapeQuerySyntax())));
}
}
}
return(node);
}
protected override IQueryNode PostProcessNode(IQueryNode node)
{
if (node is WildcardQueryNode wildcardNode)
{
if (wildcardNode.Text.Length > 0)
{
// Validate if the wildcard was escaped
if (UnescapedCharSequence.WasEscaped(wildcardNode.Text, 0))
{
return(node);
}
switch (wildcardNode.Text[0])
{
case '*':
case '?':
// LUCENENET: Factored out NLS/Message/IMessage so end users can optionally utilize the built-in .NET localization.
throw new QueryNodeException(string.Format(
QueryParserMessages.LEADING_WILDCARD_NOT_ALLOWED, node
.ToQueryString(new EscapeQuerySyntax())));
}
}
}
return(node);
}
private bool IsPrefixWildcard(string text)
{
if (text is null || text.Length <= 0 || !IsWildcard(text))
{
return(false);
}
// Validate last character is a '*' and was not escaped
// If single '*' is is a wildcard not prefix to simulate old queryparser
if (text[text.Length - 1] != '*')
{
return(false);
}
if (UnescapedCharSequence.WasEscaped(new StringCharSequence(text), text.Length - 1))
{
return(false);
}
if (text.Length == 1)
{
return(false);
}
// Only make a prefix if there is only one single star at the end and no '?' or '*' characters
// If single wildcard return false to mimic old queryparser
for (int i = 0; i < text.Length; i++)
{
if (text[i] == '?')
{
return(false);
}
if (text[i] == '*' && !UnescapedCharSequence.WasEscaped(new StringCharSequence(text), i))
{
if (i == text.Length - 1)
{
return(true);
}
else
{
return(false);
}
}
}
return(false);
}
private static bool IsWildcard(string text) // LUCENENET: CA1822: Mark members as static
{
if (text is null || text.Length <= 0)
{
return(false);
}
// If a un-escaped '*' or '?' if found return true
// start at the end since it's more common to put wildcards at the end
for (int i = text.Length - 1; i >= 0; i--)
{
if ((text[i] == '*' || text[i] == '?') && !UnescapedCharSequence.WasEscaped(new StringCharSequence(text), i))
{
return(true);
}
}
return(false);
}
private bool IsWildcard(string text)
{
if (text == null || text.Length <= 0)
{
return(false);
}
// If a un-escaped '*' or '?' if found return true
// start at the end since it's more common to put wildcards at the end
for (int i = text.Length - 1; i >= 0; i--)
{
if ((text[i] == '*' || text[i] == '?') && !UnescapedCharSequence.WasEscaped(new StringCharSequenceWrapper(text), i))
{
return(true);
}
}
return(false);
}
protected override IQueryNode PostProcessNode(IQueryNode node)
{
CultureInfo locale = GetQueryConfigHandler().Get(ConfigurationKeys.LOCALE);
if (locale == null)
{
locale = CultureInfo.InvariantCulture; //Locale.getDefault();
}
if (node is WildcardQueryNode ||
node is FuzzyQueryNode ||
(node is FieldQueryNode && node.Parent is IRangeQueryNode) ||
node is RegexpQueryNode)
{
ITextableQueryNode txtNode = (ITextableQueryNode)node;
ICharSequence text = txtNode.Text;
txtNode.Text = text != null?UnescapedCharSequence.ToLowerCase(text, locale) : null;
}
return(node);
}
