/// <summary>
/// Parse a filter ID, that is, an ID of the general form "[f1] s1-t1/v1",
/// with the filters optional, and the variants optional.
/// </summary>
///
/// <param name="id">the id to be parsed</param>
/// <param name="pos">INPUT-OUTPUT parameter. On input, the position of the firstcharacter to parse. On output, the position after the lastcharacter parsed.</param>
/// <returns>a SingleID object or null if the parse fails</returns>
public static TransliteratorIDParser.SingleID ParseFilterID(String id, int[] pos)
{
int start = pos[0];
TransliteratorIDParser.Specs specs = ParseFilterID(id, pos, true);
if (specs == null)
{
pos[0] = start;
return(null);
}
// Assemble return results
TransliteratorIDParser.SingleID single = SpecsToID(specs, FORWARD);
single.filter = specs.filter;
return(single);
}
/// <summary>
/// Convert the elements of the 'list' vector, which are SingleID objects,
/// into actual Transliterator objects. In the course of this, some (or all)
/// entries may be removed. If all entries are removed, the Null
/// transliterator will be added.
/// Delete entries with empty basicIDs; these are generated by elements like
/// "(A)" in the forward direction, or "A()" in the reverse. THIS MAY RESULT
/// IN AN EMPTY VECTOR. Convert SingleID entries to actual transliterators.
/// </summary>
///
/// <param name="list">vector of SingleID objects. On exit, vector of one or moreTransliterators.</param>
public static void InstantiateList(ArrayList list)
{
Transliterator t;
for (int i = 0; i <= list.Count;) // [sic]: i<=list.size()
// We run the loop too long by one, so we can
// do an insert after the last element
{
if (i == list.Count)
{
break;
}
TransliteratorIDParser.SingleID single = (TransliteratorIDParser.SingleID)list[i];
if (single.basicID.Length == 0)
{
ILOG.J2CsMapping.Collections.Collections.RemoveAt(list, i);
}
else
{
t = single.GetInstance();
if (t == null)
{
t = single.GetInstance();
throw new ArgumentException("Illegal ID "
+ single.canonID);
}
list[i] = t;
++i;
}
}
// An empty list is equivalent to a Null transliterator.
if (list.Count == 0)
{
t = IBM.ICU.Text.Transliterator.GetBasicInstance("Any-Null", null);
if (t == null)
{
// Should never happen
throw new ArgumentException(
"Internal error; cannot instantiate Any-Null");
}
list.Add(t);
}
}
/// <summary>
/// Parse a compound ID, consisting of an optional forward global filter, a
/// separator, one or more single IDs delimited by separators, an an optional
/// reverse global filter. The separator is a semicolon. The global filters
/// are UnicodeSet patterns. The reverse global filter must be enclosed in
/// parentheses.
/// </summary>
///
/// <param name="id">the pattern the parse</param>
/// <param name="dir">the direction.</param>
/// <param name="canonID_0">OUTPUT parameter that receives the canonical ID, consisting ofcanonical IDs for all elements, as returned byparseSingleID(), separated by semicolons. Previous contentsare discarded.</param>
/// <param name="list">OUTPUT parameter that receives a list of SingleID objectsrepresenting the parsed IDs. Previous contents are discarded.</param>
/// <param name="globalFilter">OUTPUT parameter that receives a pointer to a newly createdglobal filter for this ID in this direction, or null if thereis none.</param>
/// <returns>true if the parse succeeds, that is, if the entire id is consumed
/// without syntax error.</returns>
public static bool ParseCompoundID(String id, int dir,
StringBuilder canonID_0, ArrayList list, UnicodeSet[] globalFilter)
{
int[] pos = new int[] { 0 };
int[] withParens = new int[1];
list.Clear();
UnicodeSet filter_1;
globalFilter[0] = null;
canonID_0.Length = 0;
// Parse leading global filter, if any
withParens[0] = 0; // parens disallowed
filter_1 = ParseGlobalFilter(id, pos, dir, withParens, canonID_0);
if (filter_1 != null)
{
if (!IBM.ICU.Impl.Utility.ParseChar(id, pos, ID_DELIM))
{
// Not a global filter; backup and resume
canonID_0.Length = 0;
pos[0] = 0;
}
if (dir == FORWARD)
{
globalFilter[0] = filter_1;
}
}
bool sawDelimiter = true;
for (;;)
{
TransliteratorIDParser.SingleID single = ParseSingleID(id, pos, dir);
if (single == null)
{
break;
}
if (dir == FORWARD)
{
list.Add(single);
}
else
{
list.Insert(0, single);
}
if (!IBM.ICU.Impl.Utility.ParseChar(id, pos, ID_DELIM))
{
sawDelimiter = false;
break;
}
}
if (list.Count == 0)
{
return(false);
}
// Construct canonical ID
for (int i = 0; i < list.Count; ++i)
{
TransliteratorIDParser.SingleID single_2 = (TransliteratorIDParser.SingleID)list[i];
canonID_0.Append(single_2.canonID);
if (i != (list.Count - 1))
{
canonID_0.Append(ID_DELIM);
}
}
// Parse trailing global filter, if any, and only if we saw
// a trailing delimiter after the IDs.
if (sawDelimiter)
{
withParens[0] = 1; // parens required
filter_1 = ParseGlobalFilter(id, pos, dir, withParens, canonID_0);
if (filter_1 != null)
{
// Don't require trailing ';', but parse it if present
IBM.ICU.Impl.Utility.ParseChar(id, pos, ID_DELIM);
if (dir == REVERSE)
{
globalFilter[0] = filter_1;
}
}
}
// Trailing unparsed text is a syntax error
IBM.ICU.Impl.Utility.SkipWhitespace(id, pos[0]);
if (pos[0] != id.Length)
{
return(false);
}
return(true);
}
