PatternGrouping.jvm.cs :  » 2.6.4-mono-.net-core » System.Text » System » Text » RegularExpressions » C# / CSharp Open Source

//
// PatternGrouping.jvm.cs
//
// Author:
//  Arina Itkes  <arinai@mainsoft.com>
//
// Copyright (C) 2007 Mainsoft, Inc.
//

//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//



using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;

namespace System.Text.RegularExpressions{
  sealed class PatternGrouping
  {
    int _groupCount;
    IDictionary _groupNameToNumberMap;
    int [] _javaToNetGroupNumbersMap;
    string [] _groupNumberToNameMap;
    int [] _netToJavaNumbersMap;
    bool _sameGroupsFlag;

    internal string [] GroupNumberToNameMap {
      get { return _groupNumberToNameMap; }
    }

    internal int [] JavaToNetGroupNumbersMap {
      get { return _javaToNetGroupNumbersMap; }
    }

    internal IDictionary GroupNameToNumberMap {
      get { return _groupNameToNumberMap; }
    }

    internal int [] NetToJavaNumbersMap {
      get { return _netToJavaNumbersMap; }
    }

    internal bool SameGroupsFlag {
      get { return _sameGroupsFlag; }
    }

    internal int GroupCount {
      get { return _groupCount; }
    }

    internal PatternGrouping () {
      this._groupCount = -1;
    }

    internal void SetGroups (int netGroupCount, int javaGroupCount) {
      this._groupCount = netGroupCount;

      _groupNameToNumberMap = new Hashtable (_groupCount + 1);
      _javaToNetGroupNumbersMap = new int [javaGroupCount + 1];
      _groupNumberToNameMap = new string [_groupCount + 1];
      _netToJavaNumbersMap = new int [_groupCount + 1];

      for (int i = 0; i <= _groupCount; ++i) {
        _groupNameToNumberMap.Add (i.ToString (), i);
        _javaToNetGroupNumbersMap [i] = i;
        _groupNumberToNameMap [i] = i.ToString ();
        _netToJavaNumbersMap [i] = i;
      }
      for (int i = _groupCount + 1; i <= javaGroupCount; ++i) {
        _javaToNetGroupNumbersMap [i] = -1;
      }
    }

    internal void SetGroups (string [] namedGroups,
                int [] javaGroupNumberToNetGroupNumber,
                int noNamedGroupNumber,
                int capturedGroupsCount,
                int sameGroupsCounter,
                RegexOptions options) {
      _groupNumberToNameMap = new string [capturedGroupsCount + 1];
      _groupNameToNumberMap = new Hashtable (capturedGroupsCount + 1);
      _netToJavaNumbersMap = new int [capturedGroupsCount + 1];

      _javaToNetGroupNumbersMap = javaGroupNumberToNetGroupNumber;

      if ((options & RegexOptions.ExplicitCapture) == RegexOptions.ExplicitCapture) {
        FillExplicitGroupMaps (namedGroups,
        capturedGroupsCount,
        sameGroupsCounter,
        options);
        return;
      }
      else {
        FillImplicitGroupMaps (namedGroups,
          noNamedGroupNumber + 1,
          capturedGroupsCount,
          sameGroupsCounter,
          options);
      }

    }

    private void FillImplicitGroupMaps (string [] namedGroups,
      int namedGroupNumber,
      int capturedGroupsCount,
      int sameGroupsCounter,
      RegexOptions options) {
      int addedNamedGroupsCount = 0;

      for (int i = 0; i < capturedGroupsCount + 1; ++i) {
        int netGroupNumber = _javaToNetGroupNumbersMap [i];
        if (netGroupNumber == -1) {
          if (_groupNameToNumberMap.Contains (namedGroups [addedNamedGroupsCount])) {
            _javaToNetGroupNumbersMap [i] = (int) _groupNameToNumberMap [namedGroups [addedNamedGroupsCount]];
            ++sameGroupsCounter;
          }
          else {
            _javaToNetGroupNumbersMap [i] = namedGroupNumber;
            _groupNumberToNameMap [namedGroupNumber] = namedGroups [addedNamedGroupsCount];
            ++namedGroupNumber;
          }

          netGroupNumber = _javaToNetGroupNumbersMap [i];
          ++addedNamedGroupsCount;
        }
        else {
          _groupNumberToNameMap [netGroupNumber] =
            netGroupNumber.ToString ();
        }
        _groupNameToNumberMap [_groupNumberToNameMap [netGroupNumber]] = netGroupNumber;
        _netToJavaNumbersMap [_javaToNetGroupNumbersMap [i]] = i;
      }
      _groupCount = capturedGroupsCount - sameGroupsCounter;
      _sameGroupsFlag = (sameGroupsCounter != 0);

    }

    private void FillExplicitGroupMaps (string [] namedGroups,
      int capturedGroupsCount,
      int sameGroupsCounter,
      RegexOptions options) {
      int addedNamedGroupsCount = 0;
      int namedGroupNumber = 1;
      int nonCapturedGroupsNumber = 0;

      for (int i = 1; i < capturedGroupsCount + 1; ++i) {
        int netGroupNumber = _javaToNetGroupNumbersMap [i];
        if (netGroupNumber >= 0) {
          _javaToNetGroupNumbersMap [i] = -1;
          ++nonCapturedGroupsNumber;
          continue;
        }

        if (_groupNameToNumberMap.Contains (namedGroups [addedNamedGroupsCount])) {
          _javaToNetGroupNumbersMap [i] = (int) _groupNameToNumberMap [namedGroups [addedNamedGroupsCount]];
          ++sameGroupsCounter;
        }
        else {
          _javaToNetGroupNumbersMap [i] = namedGroupNumber;
          _groupNumberToNameMap [namedGroupNumber] = namedGroups [addedNamedGroupsCount];
          ++namedGroupNumber;
        }

        netGroupNumber = _javaToNetGroupNumbersMap [i];
        ++addedNamedGroupsCount;

        _groupNameToNumberMap [_groupNumberToNameMap [netGroupNumber]] = netGroupNumber;
        _netToJavaNumbersMap [_javaToNetGroupNumbersMap [i]] = i;
      }
      _groupCount = capturedGroupsCount - sameGroupsCounter - nonCapturedGroupsNumber;
      _sameGroupsFlag = (sameGroupsCounter != 0);
    }
  }
}