Exemplo n.º 1
0
        public IPattern Build(string pattern)
        {
            if (pattern == null)
            {
                throw new ArgumentNullException("pattern");
            }

            pattern = pattern.TrimStart(_slashes);

            if (pattern.TrimEnd(_slashes).Length < pattern.Length)
            {
                // If the pattern end with a slash, it is considered as
                // a directory.
                pattern = pattern.TrimEnd(_slashes) + "/**";
            }

            var allSegments          = new List <IPathSegment>();
            var isParentSegmentLegal = true;

            IList <IPathSegment>          segmentsPatternStartsWith = null;
            IList <IList <IPathSegment> > segmentsPatternContains   = null;
            IList <IPathSegment>          segmentsPatternEndsWith   = null;

            var endPattern = pattern.Length;

            for (int scanPattern = 0; scanPattern < endPattern;)
            {
                var beginSegment = scanPattern;
                var endSegment   = NextIndex(pattern, _slashes, scanPattern, endPattern);

                IPathSegment segment = null;

                if (segment == null && endSegment - beginSegment == 3)
                {
                    if (pattern[beginSegment] == '*' &&
                        pattern[beginSegment + 1] == '.' &&
                        pattern[beginSegment + 2] == '*')
                    {
                        // turn *.* into *
                        beginSegment += 2;
                    }
                }

                if (segment == null && endSegment - beginSegment == 2)
                {
                    if (pattern[beginSegment] == '*' &&
                        pattern[beginSegment + 1] == '*')
                    {
                        // recognized **
                        segment = new RecursiveWildcardSegment();
                    }
                    else if (pattern[beginSegment] == '.' &&
                             pattern[beginSegment + 1] == '.')
                    {
                        // recognized ..

                        if (!isParentSegmentLegal)
                        {
                            throw new ArgumentException("\"..\" can be only added at the beginning of the pattern.");
                        }
                        segment = new ParentPathSegment();
                    }
                }

                if (segment == null && endSegment - beginSegment == 1)
                {
                    if (pattern[beginSegment] == '.')
                    {
                        // recognized .
                        segment = new CurrentPathSegment();
                    }
                }

                if (segment == null && endSegment - beginSegment > 2)
                {
                    if (pattern[beginSegment] == '*' &&
                        pattern[beginSegment + 1] == '*' &&
                        pattern[beginSegment + 2] == '.')
                    {
                        // recognize **.
                        // swallow the first *, add the recursive path segment and
                        // the remaining part will be treat as wild card in next loop.
                        segment    = new RecursiveWildcardSegment();
                        endSegment = beginSegment;
                    }
                }

                if (segment == null)
                {
                    var beginsWith = string.Empty;
                    var contains   = new List <string>();
                    var endsWith   = string.Empty;

                    for (int scanSegment = beginSegment; scanSegment < endSegment;)
                    {
                        var beginLiteral = scanSegment;
                        var endLiteral   = NextIndex(pattern, _star, scanSegment, endSegment);

                        if (beginLiteral == beginSegment)
                        {
                            if (endLiteral == endSegment)
                            {
                                // and the only bit
                                segment = new LiteralPathSegment(Portion(pattern, beginLiteral, endLiteral), ComparisonType);
                            }
                            else
                            {
                                // this is the first bit
                                beginsWith = Portion(pattern, beginLiteral, endLiteral);
                            }
                        }
                        else if (endLiteral == endSegment)
                        {
                            // this is the last bit
                            endsWith = Portion(pattern, beginLiteral, endLiteral);
                        }
                        else
                        {
                            if (beginLiteral != endLiteral)
                            {
                                // this is a middle bit
                                contains.Add(Portion(pattern, beginLiteral, endLiteral));
                            }
                            else
                            {
                                // note: NOOP here, adjacent *'s are collapsed when they
                                // are mixed with literal text in a path segment
                            }
                        }

                        scanSegment = endLiteral + 1;
                    }

                    if (segment == null)
                    {
                        segment = new WildcardPathSegment(beginsWith, contains, endsWith, ComparisonType);
                    }
                }

                if (!(segment is ParentPathSegment))
                {
                    isParentSegmentLegal = false;
                }

                if (segment is CurrentPathSegment)
                {
                    // ignore ".\"
                }
                else
                {
                    if (segment is RecursiveWildcardSegment)
                    {
                        if (segmentsPatternStartsWith == null)
                        {
                            segmentsPatternStartsWith = new List <IPathSegment>(allSegments);
                            segmentsPatternEndsWith   = new List <IPathSegment>();
                            segmentsPatternContains   = new List <IList <IPathSegment> >();
                        }
                        else if (segmentsPatternEndsWith.Count != 0)
                        {
                            segmentsPatternContains.Add(segmentsPatternEndsWith);
                            segmentsPatternEndsWith = new List <IPathSegment>();
                        }
                    }
                    else if (segmentsPatternEndsWith != null)
                    {
                        segmentsPatternEndsWith.Add(segment);
                    }

                    allSegments.Add(segment);
                }

                scanPattern = endSegment + 1;
            }

            if (segmentsPatternStartsWith == null)
            {
                return(new LinearPattern(allSegments));
            }
            else
            {
                return(new RaggedPattern(allSegments, segmentsPatternStartsWith, segmentsPatternEndsWith, segmentsPatternContains));
            }
        }
Exemplo n.º 2
0
        public void Match(string testSample, bool expectation)
        {
            var pathSegment = new ParentPathSegment();

            Assert.Equal(expectation, pathSegment.Match(testSample));
        }