Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Regex / System / Text / RegularExpressions / RegexGroupCollection.cs / 1 / RegexGroupCollection.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- // The GroupCollection lists the captured Capture numbers // contained in a compiled Regex. namespace System.Text.RegularExpressions { using System.Collections; ////// [ Serializable() ] public class GroupCollection : ICollection { internal Match _match; internal Hashtable _captureMap; // cache of Group objects fed to the user internal Group[] _groups; /* * Nonpublic constructor */ internal GroupCollection(Match match, Hashtable caps) { _match = match; _captureMap = caps; } /* * The object on which to synchronize */ ////// Represents a sequence of capture substrings. The object is used /// to return the set of captures done by a single capturing group. /// ////// public Object SyncRoot { get { return _match; } } /* * ICollection */ ///[To be supplied.] ////// public bool IsSynchronized { get { return false; } } /* * ICollection */ ///[To be supplied.] ////// public bool IsReadOnly { get { return true; } } ///[To be supplied.] ////// public int Count { get { return _match._matchcount.Length; } } ////// Returns the number of groups. /// ////// public Group this[int groupnum] { get { return GetGroup(groupnum); } } ///[To be supplied.] ////// public Group this[String groupname] { get { if (_match._regex == null) return Group._emptygroup; return GetGroup(_match._regex.GroupNumberFromName(groupname)); } } internal Group GetGroup(int groupnum) { if (_captureMap != null) { Object o; o = _captureMap[groupnum]; if (o == null) return Group._emptygroup; //throw new ArgumentOutOfRangeException("groupnum"); return GetGroupImpl((int)o); } else { //if (groupnum >= _match._regex.CapSize || groupnum < 0) // throw new ArgumentOutOfRangeException("groupnum"); if (groupnum >= _match._matchcount.Length || groupnum < 0) return Group._emptygroup; return GetGroupImpl(groupnum); } } /* * Caches the group objects */ internal Group GetGroupImpl(int groupnum) { if (groupnum == 0) return _match; // Construct all the Group objects the first time GetGroup is called if (_groups == null) { _groups = new Group[_match._matchcount.Length - 1]; for (int i = 0; i < _groups.Length; i++) { _groups[i] = new Group(_match._text, _match._matches[i + 1], _match._matchcount[i + 1]); } } return _groups[groupnum - 1]; } /* * As required by ICollection */ ///[To be supplied.] ////// public void CopyTo(Array array, int arrayIndex) { if (array == null) throw new ArgumentNullException("array"); for (int i = arrayIndex, j = 0; j < Count; i++, j++) { array.SetValue(this[j], i); } } /* * As required by ICollection */ ////// Copies all the elements of the collection to the given array /// beginning at the given index. /// ////// public IEnumerator GetEnumerator() { return new GroupEnumerator(this); } } /* * This non-public enumerator lists all the captures * Should it be public? */ internal class GroupEnumerator : IEnumerator { internal GroupCollection _rgc; internal int _curindex; /* * Nonpublic constructor */ internal GroupEnumerator(GroupCollection rgc) { _curindex = -1; _rgc = rgc; } /* * As required by IEnumerator */ public bool MoveNext() { int size = _rgc.Count; if (_curindex >= size) return false; _curindex++; return(_curindex < size); } /* * As required by IEnumerator */ public Object Current { get { return Capture;} } /* * Returns the current capture */ public Capture Capture { get { if (_curindex < 0 || _curindex >= _rgc.Count) throw new InvalidOperationException(SR.GetString(SR.EnumNotStarted)); return _rgc[_curindex]; } } /* * Reset to before the first item */ public void Reset() { _curindex = -1; } } }/// Provides an enumerator in the same order as Item[]. /// ///
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