RegexCaptureCollection.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Regex / System / Text / RegularExpressions / RegexCaptureCollection.cs / 1305376 / RegexCaptureCollection.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

// The CaptureCollection lists the captured Capture numbers 
// contained in a compiled Regex. 

namespace System.Text.RegularExpressions { 

    using System.Collections;

    /* 
     * This collection returns the Captures for a group
     * in the order in which they were matched (left to right 
     * or right to left). It is created by Group.Captures 
     */
    ///  
    ///    
    ///       Represents a sequence of capture substrings. The object is used
    ///       to return the set of captures done by a single capturing group.
    ///     
    /// 
#if !SILVERLIGHT 
    [ Serializable() ] 
#endif
    public class CaptureCollection : ICollection { 
        internal Group _group;
        internal int _capcount;
        internal Capture[] _captures;
 
        /*
         * Nonpublic constructor 
         */ 
        internal CaptureCollection(Group group) {
            _group = group; 
            _capcount = _group._capcount;
        }

        /* 
         * The object on which to synchronize
         */ 
        ///  
        ///    [To be supplied.]
        ///  
        public Object SyncRoot {
            get {
                return _group;
            } 
        }
 
        /* 
         * ICollection
         */ 
        /// 
        ///    [To be supplied.]
        /// 
        public bool IsSynchronized { 
            get {
                return false; 
            } 
        }
 
        /*
         * ICollection
         */
        ///  
        ///    [To be supplied.]
        ///  
        public bool IsReadOnly { 
            get {
                return true; 
            }
        }

        /* 
         * The number of captures for the group
         */ 
        ///  
        ///    
        ///       Returns the number of captures. 
        ///    
        /// 
        public int Count {
            get { 
                return _capcount;
            } 
        } 

        /* 
         * The ith capture in the group
         */
        /// 
        ///     
        ///       Provides a means of accessing a specific capture in the collection.
        ///     
        ///  
        public Capture this[int i]
        { 
            get {
                return GetCapture(i);
            }
        } 

        /* 
         * As required by ICollection 
         */
        ///  
        ///    
        ///       Copies all the elements of the collection to the given array
        ///       beginning at the given index.
        ///     
        /// 
        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 
         */
        ///  
        ///    
        ///       Provides an enumerator in the same order as Item[].
        ///    
        ///  
        public IEnumerator GetEnumerator() {
            return new CaptureEnumerator(this); 
        } 

        /* 
         * Nonpublic code to return set of captures for the group
         */
        internal Capture GetCapture(int i) {
            if (i == _capcount - 1 && i >= 0) 
                return _group;
 
            if (i >= _capcount || i < 0) 
                throw new ArgumentOutOfRangeException("i");
 
            // first time a capture is accessed, compute them all
            if (_captures == null) {
                _captures = new Capture[_capcount];
                for (int j = 0; j < _capcount - 1; j++) { 
                    _captures[j] = new Capture(_group._text, _group._caps[j * 2], _group._caps[j * 2 + 1]);
                } 
            } 

            return _captures[i]; 
        }
    }

 
    /*
     * This non-public enumerator lists all the captures 
     * Should it be public? 
     */
#if !SILVERLIGHT 
    [ Serializable() ]
#endif
    internal class CaptureEnumerator : IEnumerator {
        internal CaptureCollection _rcc; 
        internal int _curindex;
 
        /* 
         * Nonpublic constructor
         */ 
        internal CaptureEnumerator(CaptureCollection rcc) {
            _curindex = -1;
            _rcc = rcc;
        } 

        /* 
         * As required by IEnumerator 
         */
        public bool MoveNext() { 
            int size = _rcc.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 >= _rcc.Count)
                    throw new InvalidOperationException(SR.GetString(SR.EnumNotStarted)); 
 
                return _rcc[_curindex];
            } 
        }

        /*
         * Reset to before the first item 
         */
        public void Reset() { 
            _curindex = -1; 
        }
    } 

}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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