public IPattern <TKey, TPayload, TRegister, TAccumulator> Or(
Func <IAbstractPatternRoot <TKey, TPayload, TRegister, TAccumulator>, IPattern <TKey, TPayload, TRegister, TAccumulator> > pattern1,
Func <IAbstractPatternRoot <TKey, TPayload, TRegister, TAccumulator>, IPattern <TKey, TPayload, TRegister, TAccumulator> > pattern2,
params Func <IAbstractPatternRoot <TKey, TPayload, TRegister, TAccumulator>, IPattern <TKey, TPayload, TRegister, TAccumulator> >[] patterns)
{
var allPatterns = new Afa <TPayload, TRegister, TAccumulator> [patterns.Length + 2];
allPatterns[0] = pattern1(new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>()).AFA;
allPatterns[1] = pattern2(new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>()).AFA;
for (int i = 0; i < patterns.Length; i++)
{
allPatterns[i + 2] = patterns[i](new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>()).AFA;
}
var result = new Afa <TPayload, TRegister, TAccumulator>(this.defaultRegister, this.defaultAccumulator);
int oldMax;
for (int i = 0; i < allPatterns.Length; i++)
{
var nextPattern = allPatterns[i];
oldMax = result.MaxState + 1;
result.AddArc(0, nextPattern.StartState + oldMax, new EpsilonArc <TPayload, TRegister>());
// If the next pattern start state is also a final state, add it directly, as it will not necessarily have a transition entry
if (nextPattern.finalStates.Contains(nextPattern.StartState))
{
if (!result.finalStates.Contains(nextPattern.StartState + oldMax))
{
result.finalStates.Add(nextPattern.StartState + oldMax);
}
}
foreach (var kvp1 in nextPattern.transitionInfo)
{
foreach (var kvp2 in kvp1.Value)
{
int from = kvp1.Key + oldMax;
int to = kvp2.Key + oldMax;
result.AddArc(from, to, kvp2.Value);
if (nextPattern.finalStates.Contains(kvp2.Key))
{
if (!result.finalStates.Contains(to))
{
result.finalStates.Add(to);
}
}
}
}
}
result.StartState = 0;
return(Concat(x => new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>(this.source, result)));
}
public IPattern <TKey, TPayload, TRegister, TAccumulator> Or(
Func <IAbstractPatternRoot <TKey, TPayload, TRegister, TAccumulator>, IPattern <TKey, TPayload, TRegister, TAccumulator> > pattern1,
Func <IAbstractPatternRoot <TKey, TPayload, TRegister, TAccumulator>, IPattern <TKey, TPayload, TRegister, TAccumulator> > pattern2,
params Func <IAbstractPatternRoot <TKey, TPayload, TRegister, TAccumulator>, IPattern <TKey, TPayload, TRegister, TAccumulator> >[] patterns)
{
var allPatterns = new Afa <TPayload, TRegister, TAccumulator> [patterns.Length + 2];
allPatterns[0] = pattern1(new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>()).AFA;
allPatterns[1] = pattern2(new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>()).AFA;
for (int i = 0; i < patterns.Length; i++)
{
allPatterns[i + 2] = patterns[i](new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>()).AFA;
}
var result = new Afa <TPayload, TRegister, TAccumulator>();
int oldMax;
for (int i = 0; i < allPatterns.Length; i++)
{
var nextPattern = allPatterns[i];
oldMax = result.MaxState + 1;
result.AddArc(0, nextPattern.StartState + oldMax, new EpsilonArc <TPayload, TRegister>());
foreach (var kvp1 in nextPattern.transitionInfo)
{
foreach (var kvp2 in kvp1.Value)
{
int from = kvp1.Key;
int to = kvp2.Key;
from = from + oldMax;
to = to + oldMax;
result.AddArc(from, to, kvp2.Value);
if (nextPattern.finalStates.Contains(kvp2.Key))
{
if (!result.finalStates.Contains(to))
{
result.finalStates.Add(to);
}
}
}
}
}
result.StartState = 0;
return(Concat(x => new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>(this.source, result)));
}
public IPattern <TKey, TPayload, TRegister, TAccumulator> KleeneStar(
Func <IAbstractPatternRoot <TKey, TPayload, TRegister, TAccumulator>, IPattern <TKey, TPayload, TRegister, TAccumulator> > pattern)
{
var newConcreteRegex = pattern(new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>());
var result = new Afa <TPayload, TRegister, TAccumulator>();
var pattern_ = (Afa <TPayload, TRegister, TAccumulator>)newConcreteRegex.AFA;
// Every final state maps back to the start state
foreach (var kvp1 in pattern_.transitionInfo)
{
foreach (var kvp2 in kvp1.Value)
{
var to = kvp2.Key;
if (pattern_.finalStates.Contains(to))
{
to = pattern_.StartState;
}
result.AddArc(kvp1.Key, to, kvp2.Value);
}
}
// Start state becomes the single final state
result.finalStates.Add(pattern_.StartState);
result.StartState = pattern_.StartState;
return(Concat(x => new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>(this.source, result)));
}
/// <summary>
/// Creates a new pattern resulting from the disjunction of other patterns
/// </summary>
/// <typeparam name="TInput">The type of stream input data</typeparam>
/// <typeparam name="TRegister">The type of the register to be mutated as transitions occur</typeparam>
/// <typeparam name="TAccumulator">The type of the accumulator in the underlying automaton</typeparam>
/// <param name="pattern1">The first pattern in the disjunction</param>
/// <param name="pattern2">The second pattern in the disjunction</param>
/// <param name="patterns">Any remaining patterns to be disjunction, in order</param>
/// <returns>A pattern whose first transition is the one just created</returns>
public static Afa <TInput, TRegister, TAccumulator> Or <TInput, TRegister, TAccumulator>(Afa <TInput, TRegister, TAccumulator> pattern1, Afa <TInput, TRegister, TAccumulator> pattern2, params Afa <TInput, TRegister, TAccumulator>[] patterns)
{
var allPatterns = new Afa <TInput, TRegister, TAccumulator> [patterns.Length + 2];
allPatterns[0] = pattern1;
allPatterns[1] = pattern2;
patterns.CopyTo(allPatterns, 2);
var result = new Afa <TInput, TRegister, TAccumulator>();
int oldMax;
for (int i = 0; i < allPatterns.Length; i++)
{
var nextPattern = allPatterns[i];
oldMax = result.MaxState + 1;
result.AddArc(0, nextPattern.StartState + oldMax, new EpsilonArc <TInput, TRegister>());
foreach (var kvp1 in nextPattern.transitionInfo)
{
foreach (var kvp2 in kvp1.Value)
{
int from = kvp1.Key;
int to = kvp2.Key;
from = from + oldMax;
to = to + oldMax;
result.AddArc(from, to, kvp2.Value);
if (nextPattern.finalStates.Contains(kvp2.Key))
{
if (!result.finalStates.Contains(to))
{
result.finalStates.Add(to);
}
}
}
}
}
result.StartState = 0;
return(result);
}
public IPattern <TKey, TPayload, TRegister, TAccumulator> Epsilon()
{
var afa = new Afa <TPayload, TRegister, TAccumulator>();
afa.AddArc(0, 1, new EpsilonArc <TPayload, TRegister> {
});
afa.Seal();
return(Concat(x => new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>(this.source, afa)));
}
public IPattern <TKey, TPayload, TRegister, TAccumulator> SingleElement(Expression <Func <long, TPayload, TRegister, bool> > condition = null, Expression <Func <long, TPayload, TRegister, TRegister> > aggregator = null)
{
var afa = new Afa <TPayload, TRegister, TAccumulator>();
afa.AddArc(0, 1, new SingleElementArc <TPayload, TRegister> {
Fence = condition, Transfer = aggregator
});
afa.Seal();
return(Concat(x => new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>(this.source, afa)));
}
public IPattern <TKey, TPayload, TRegister, TAccumulator> MultiElement(Expression <Func <long, TRegister, TAccumulator> > initialize, Expression <Func <long, TPayload, TRegister, TAccumulator, TAccumulator> > accumulate, Expression <Func <long, TPayload, TAccumulator, bool> > skipToEnd, Expression <Func <long, TAccumulator, TRegister, bool> > fence, Expression <Func <long, TAccumulator, TRegister, TRegister> > transfer, Expression <Action <TAccumulator> > dispose)
{
var afa = new Afa <TPayload, TRegister, TAccumulator>();
afa.AddArc(0, 1, new MultiElementArc <TPayload, TRegister, TAccumulator>
{
Initialize = initialize,
Accumulate = accumulate,
SkipToEnd = skipToEnd,
Fence = fence,
Transfer = transfer,
Dispose = dispose
});
afa.Seal();
return(Concat(x => new PatternMatcher <TKey, TPayload, TRegister, TAccumulator>(this.source, afa)));
}
/// <summary>
/// Creates a new pattern resulting from zero to many iterations of the given pattern
/// </summary>
/// <typeparam name="TInput">The type of stream input data</typeparam>
/// <typeparam name="TRegister">The type of the register to be mutated as transitions occur</typeparam>
/// <typeparam name="TAccumulator">The type of the accumulator in the underlying automaton</typeparam>
/// <param name="pattern">The pattern to iterate</param>
/// <returns>A pattern whose first transition is the one just created</returns>
public static Afa <TInput, TRegister, TAccumulator> KleeneStar <TInput, TRegister, TAccumulator>(Afa <TInput, TRegister, TAccumulator> pattern)
{
var result = new Afa <TInput, TRegister, TAccumulator>();
// Every final state maps back to the start state
foreach (var kvp1 in pattern.transitionInfo)
{
foreach (var kvp2 in kvp1.Value)
{
var to = kvp2.Key;
if (pattern.finalStates.Contains(to))
{
to = pattern.StartState;
}
result.AddArc(kvp1.Key, to, kvp2.Value);
}
}
// Start state becomes the single final state
result.finalStates.Add(pattern.StartState);
result.StartState = pattern.StartState;
return(result);
}