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

//
// JvmReMachine.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.Collections;
using System.Text;
using java.util.regex;
using java.lang;

namespace System.Text.RegularExpressions{
  sealed class JvmReMachine : BaseMachine
  {
    readonly PatternData _patternData;

    internal JvmReMachine (PatternData patternData) {
      this._patternData = patternData;
    }

    #region Properties

    internal PatternData PatternData {
      get { return _patternData; }
    }

    internal Pattern JavaPattern {
      get { return _patternData.JavaPattern; }
    }

    internal IDictionary Mapping {
      get { return _patternData.GroupNameToNumberMap; }
      set { throw new NotImplementedException ("Mapping setter of JvmReMachine should not be called."); }//We must implement the setter of interface but it is not in use
    }

    internal string [] NamesMapping {
      get { return _patternData.GroupNumberToNameMap; }
      set { throw new NotImplementedException ("NamesMapping setter of JvmReMachine should not be called."); }//We must implement the setter of interface but it is not in use
    }

    internal int GroupCount {
      get { return _patternData.GroupCount; }
    }

    #endregion Properties

    #region Implementations of IMachine Interface

    public override Match Scan (Regex regex, string text, int start, int end) {

      if (start > end)
        return Match.Empty;

      Matcher m = JavaPattern.matcher (((CharSequence) (object) text).subSequence(0, end));

      if (!m.find (start)) {
        return System.Text.RegularExpressions.Match.Empty;
      }

      GroupCollection groups = new GroupCollection (regex.GroupCount + 1);
      Match match = new Match (regex, this, groups, text, text.Length,
                    m.start (), m.end () - m.start ());
      for (int javaGroupNumber = 1; javaGroupNumber <= m.groupCount (); ++javaGroupNumber) {
        AddGroup (m, groups, javaGroupNumber, text, match);
      }

      return match;
    }

    public override string [] Split (Regex regex, string input, int count, int startat) {
      
      string [] splitArray = JavaPattern.split ((CharSequence) (object) input.Substring (startat), count);
      
      if (regex.GroupCount == 0 || splitArray.Length == 1) {
        return splitArray;
      }

      if (count == 0)
        count = Int32.MaxValue;

      Matcher m = JavaPattern.matcher ((CharSequence) (object) input.Substring (startat));

      int splitArrayIndex = 1;

      List<string> splits = new List<string> (splitArray.Length * (1 + regex.GroupCount));
      splits.Add (splitArray [0]);

      for (int number = 0; number < count; ++number) {
        
        if (!m.find ())
          break;
        
        for (int i = 1; i <= m.groupCount (); ++i) {
          splits.Add (m.group (i));
        }

        splits.Add (splitArray [splitArrayIndex++]);
      }

      return splits.ToArray ();
    }

    public override string Replace (Regex regex, string input, string replacement, int count, int startat) {
      
      if (regex.SameGroupNamesFlag) {
        return base.Replace (regex, input, replacement, count, startat);
      }

      if (count < 0) {
        count = Int32.MaxValue;
      }

      string replacementPattern = ReplacementData.Reformat (regex, replacement);
      Matcher m = JavaPattern.matcher ((CharSequence) (object) input);

      StringBuffer sb = new StringBuffer ();
      if (count > 0 && m.find (startat)) {
        ReplacementData.ReplaceMatch (replacementPattern, m, sb, input, _patternData);
      }

      for (int matchesCounter = 1; matchesCounter < count; ++matchesCounter) {
        if (!m.find ()) {
          break;
        }
        ReplacementData.ReplaceMatch (replacementPattern, m, sb, input, _patternData);
      }


      m.appendTail (sb);
      return sb.ToString ();

    }

    public override string Result (string replacement, Match match) {
      if (match.Length == 0)
        return String.Empty;

      string result = Replace (match.Regex, match.Text, replacement, 1, 0);
      return result.Substring (match.Index, result.Length - (match.Text.Length - match.Length));

    }

    #endregion Implementations of IMachine Interface

    private void AddGroup (Matcher m, GroupCollection groups, int javaGroupNumber, string text, Match match) {
      int netGroupNumber = _patternData.JavaToNetGroupNumbersMap [javaGroupNumber];
      if (netGroupNumber == -1) {
        return;
      }

      int index = m.start (javaGroupNumber);

      if (index < 0){
        if(groups[netGroupNumber] == null) 
          groups.SetValue (new Group (), netGroupNumber);
        return;
      }

      Group group = new Group (text, index, m.end (javaGroupNumber) - index, match, netGroupNumber);

      groups.SetValue (group, netGroupNumber);
    }
  }
}