/// <summary>
/// Performs common parsing operations: start with a parse action to move the
/// value cursor onto the first character, then call a character handler for each
/// character in the pattern to build up the steps. If any handler fails,
/// that failure is returned - otherwise the return value is null.
/// </summary>
internal void ParseCustomPattern(string patternText,
Dictionary <char, CharacterHandler <TResult, TBucket> > characterHandlers)
{
var patternCursor = new PatternCursor(patternText);
// Now iterate over the pattern.
while (patternCursor.MoveNext())
{
CharacterHandler <TResult, TBucket> handler;
if (characterHandlers.TryGetValue(patternCursor.Current, out handler))
{
handler(patternCursor, this);
}
else
{
char current = patternCursor.Current;
if ((current >= 'A' && current <= 'Z') || (current >= 'a' && current <= 'z') ||
current == PatternCursor.EmbeddedPatternStart || current == PatternCursor.EmbeddedPatternEnd)
{
throw new InvalidPatternException(TextErrorMessages.UnquotedLiteral, current);
}
AddLiteral(patternCursor.Current, ParseResult <TResult> .MismatchedCharacter);
}
}
}
public void TestGetQuotedString_EscapeAtEnd()
{
var cursor = new PatternCursor("'abc\\");
Assert.AreEqual('\'', GetNextCharacter(cursor));
cursor.GetQuotedString('\'', ref failure);
Assert.Throws<InvalidPatternException>(() => failure.GetResultOrThrow());
}
public void GetRepeatCount_Valid(string text, int expectedCount)
{
var cursor = new PatternCursor(text);
Assert.IsTrue(cursor.MoveNext());
int actual = cursor.GetRepeatCount(10);
Assert.AreEqual(expectedCount, actual);
ValidateCurrentCharacter(cursor, expectedCount - 1, 'a');
}
public void GetQuotedString_Valid(string pattern, string expected)
{
var cursor = new PatternCursor(pattern);
Assert.AreEqual('\'', GetNextCharacter(cursor));
string actual = cursor.GetQuotedString('\'');
Assert.AreEqual(expected, actual);
Assert.IsFalse(cursor.MoveNext());
}
public void TestGetQuotedString_HandlesEscapedCloseQuote()
{
var cursor = new PatternCursor("'ab\\'c'");
char openQuote = GetNextCharacter(cursor);
string actual = cursor.GetQuotedString(openQuote);
Assert.AreEqual("ab'c", actual);
Assert.IsFalse(cursor.MoveNext());
}
public void TestGetQuotedString_HandlesOtherQuote()
{
var cursor = new PatternCursor("[abc]");
GetNextCharacter(cursor);
string actual = cursor.GetQuotedString(']');
Assert.AreEqual("abc", actual);
Assert.IsFalse(cursor.MoveNext());
}
public void TestGetQuotedString_Empty()
{
var cursor = new PatternCursor("''");
char openQuote = GetNextCharacter(cursor);
string actual = cursor.GetQuotedString(openQuote);
Assert.AreEqual(string.Empty, actual);
Assert.IsFalse(cursor.MoveNext());
}
internal static void HandleBackslash(PatternCursor pattern, SteppedPatternBuilder <TResult, TBucket> builder)
{
if (!pattern.MoveNext())
{
throw new InvalidPatternException(TextErrorMessages.EscapeAtEndOfString);
}
builder.AddLiteral(pattern.Current, ParseResult <TResult> .EscapedCharacterMismatch);
}
public void TestGetQuotedString()
{
var cursor = new PatternCursor("'abc'");
Assert.AreEqual('\'', GetNextCharacter(cursor));
string actual = cursor.GetQuotedString('\'');
Assert.AreEqual("abc", actual);
Assert.IsFalse(cursor.MoveNext());
}
public void TestGetQuotedString_handlesDoubleQuote()
{
var cursor = new PatternCursor("\"abc\"");
char openQuote = GetNextCharacter(cursor);
string actual = cursor.GetQuotedString(openQuote, ref failure);
Assert.AreEqual("abc", actual);
Assert.IsFalse(cursor.MoveNext());
}
public void GetQuotedString_NotAtEnd()
{
var cursor = new PatternCursor("'abc'more");
char openQuote = GetNextCharacter(cursor);
string actual = cursor.GetQuotedString(openQuote);
Assert.AreEqual("abc", actual);
ValidateCurrentCharacter(cursor, 4, '\'');
Assert.AreEqual('m', GetNextCharacter(cursor));
}
/// <summary>
/// Handle a leading "%" which acts as a pseudo-escape - it's mostly used to allow format strings such as "%H" to mean
/// "use a custom format string consisting of H instead of a standard pattern H".
/// </summary>
internal static void HandlePercent(PatternCursor pattern, SteppedPatternBuilder <TResult, TBucket> builder)
{
if (pattern.HasMoreCharacters)
{
if (pattern.PeekNext() != '%')
{
// Handle the next character as normal
return;
}
throw new InvalidPatternException(TextErrorMessages.PercentDoubled);
}
throw new InvalidPatternException(TextErrorMessages.PercentAtEndOfString);
}
/// <summary>
/// Performs common parsing operations: start with a parse action to move the
/// value cursor onto the first character, then call a character handler for each
/// character in the pattern to build up the steps. If any handler fails,
/// that failure is returned - otherwise the return value is null.
/// </summary>
internal void ParseCustomPattern(string patternText,
Dictionary <char, CharacterHandler <TResult, TBucket> > characterHandlers)
{
var patternCursor = new PatternCursor(patternText);
// Now iterate over the pattern.
while (patternCursor.MoveNext())
{
CharacterHandler <TResult, TBucket> handler;
if (characterHandlers.TryGetValue(patternCursor.Current, out handler))
{
handler(patternCursor, this);
}
else
{
AddLiteral(patternCursor.Current, ParseResult <TResult> .MismatchedCharacter);
}
}
}
public void GetQuotedString_Invalid(string pattern)
{
var cursor = new PatternCursor(pattern);
Assert.AreEqual('\'', GetNextCharacter(cursor));
Assert.Throws<InvalidPatternException>(() => cursor.GetQuotedString('\''));
}
public void GetEmbeddedPattern_Valid(string pattern, string expectedEmbedded)
{
var cursor = new PatternCursor(pattern);
cursor.MoveNext();
string embedded = cursor.GetEmbeddedPattern();
Assert.AreEqual(expectedEmbedded, embedded);
ValidateCurrentCharacter(cursor, expectedEmbedded.Length + 2, '>');
}
public void TestGetRepeatCount_three()
{
var cursor = new PatternCursor("aaa");
char ch = GetNextCharacter(cursor);
int actual = cursor.GetRepeatCount(10, ch, ref failure);
AssertNoFailure();
Assert.AreEqual(3, actual);
ValidateCurrentCharacter(cursor, 2, 'a');
}
public void TestGetRepeatCount_exceedsMax()
{
var cursor = new PatternCursor("aaa");
char ch = GetNextCharacter(cursor);
cursor.GetRepeatCount(2, ch, ref failure);
AssertInvalidPatternFailure();
}
public void TestGetQuotedString_simple()
{
var cursor = new PatternCursor("'abc'");
char openQuote = GetNextCharacter(cursor);
string actual = cursor.GetQuotedString(openQuote, ref failure);
AssertNoFailure();
Assert.AreEqual("abc", actual);
Assert.IsFalse(cursor.MoveNext());
}
public void TestGetQuotedString_missingCloseQuote()
{
var cursor = new PatternCursor("'abc");
char openQuote = GetNextCharacter(cursor);
cursor.GetQuotedString(openQuote, ref failure);
Assert.Throws<InvalidPatternException>(() => failure.GetResultOrThrow());
}
public void TestGetRepeatCount_Three()
{
var cursor = new PatternCursor("aaa");
Assert.IsTrue(cursor.MoveNext());
int actual = cursor.GetRepeatCount(10);
Assert.AreEqual(3, actual);
ValidateCurrentCharacter(cursor, 2, 'a');
}
public void TestGetEmbeddedPattern_Valid()
{
var cursor = new PatternCursor("x<HH:mm>y");
cursor.MoveNext();
string embedded = cursor.GetEmbeddedPattern('<', '>');
Assert.AreEqual("HH:mm", embedded);
ValidateCurrentCharacter(cursor, 7, '>');
}
public void TestGetEmbeddedPattern_Valid_WithEscaping()
{
var cursor = new PatternCursor(@"x<HH:\Tmm>y");
cursor.MoveNext();
string embedded = cursor.GetEmbeddedPattern('<', '>');
Assert.AreEqual(@"HH:\Tmm", embedded);
Assert.AreEqual('>', cursor.Current);
}
public void TestGetEmbeddedPattern_WrongOpenCharacter()
{
var cursor = new PatternCursor("x(oops)");
cursor.MoveNext();
Assert.Throws<InvalidPatternException>(() => cursor.GetEmbeddedPattern('<', '>'));
}
public void TestGetEmbeddedPattern_QuotedCloseCharacter()
{
var cursor = new PatternCursor("x<oops'>'");
cursor.MoveNext();
Assert.Throws<InvalidPatternException>(() => cursor.GetEmbeddedPattern('<', '>'));
}
public void TestGetQuotedString_MissingCloseQuote()
{
var cursor = new PatternCursor("'abc");
char openQuote = GetNextCharacter(cursor);
Assert.Throws<InvalidPatternException>(() => cursor.GetQuotedString(openQuote));
}
/// <summary>
/// Returns true if the next character in the pattern might represent a digit from another value (e.g. a different
/// field). Returns false otherwise, e.g. if we've reached the end of the pattern, or the next character is a literal
/// non-digit.
/// </summary>
private static bool CheckIfNextCharacterMightBeDigit(PatternCursor pattern)
{
int originalIndex = pattern.Index;
try
{
if (!pattern.MoveNext())
{
return(false);
}
char next = pattern.Current;
// If we've got an unescaped letter, assume it could be a field.
// If we've got an unescaped digit, it's a no-brainer.
if ((next >= '0' && next <= '9') || (next >= 'a' && next <= 'z') || (next >= 'A' && next <= 'Z'))
{
return(true);
}
// A % is tricky - could be any number of things. Act conservatively.
if (next == '%')
{
return(true);
}
// Quoting: find the unquoted text, and see whether it starts with a non-digit.
if (next == '\'' || next == '\"')
{
// If this throws, catch it and let it get thrown later, in the right context.
try
{
string quoted = pattern.GetQuotedString(next);
// Empty quotes - could be trying to disguise a digit afterwards...
if (quoted.Length == 0)
{
return(true);
}
char firstQuoted = quoted[0];
// Check if the quoted string starts with a digit, basically.
return(firstQuoted >= '0' && firstQuoted <= '9');
}
catch (InvalidPatternException)
{
// Doesn't really matter...
return(true);
}
}
if (next == '\\')
{
if (!pattern.MoveNext())
{
return(true); // Doesn't really matter; we'll throw an exception soon anyway.
}
char quoted = pattern.Current;
return(quoted >= '0' && quoted <= '9');
}
// Could be a date/time separator, but otherwise it's just something that we'll include
// as a literal and won't be a digit.
return(false);
}
finally
{
pattern.Move(originalIndex);
}
}
internal static void HandleQuote(PatternCursor pattern, SteppedPatternBuilder <TResult, TBucket> builder)
{
string quoted = pattern.GetQuotedString(pattern.Current);
builder.AddLiteral(quoted, ParseResult <TResult> .QuotedStringMismatch);
}
public void TestGetRepeatCount_ExceedsMax()
{
var cursor = new PatternCursor("aaa");
Assert.IsTrue(cursor.MoveNext());
Assert.Throws<InvalidPatternException>(() => cursor.GetRepeatCount(2));
}
/// <summary>
/// Handles date, time and date/time embedded patterns.
/// </summary>
internal void AddEmbeddedLocalPartial(
PatternCursor pattern,
Func <TBucket, LocalDatePatternParser.LocalDateParseBucket> dateBucketExtractor,
Func <TBucket, LocalTimePatternParser.LocalTimeParseBucket> timeBucketExtractor,
Func <TResult, LocalDate> dateExtractor,
Func <TResult, LocalTime> timeExtractor,
// null if date/time embedded patterns are invalid
Func <TResult, LocalDateTime>?dateTimeExtractor)
{
// This will be d (date-only), t (time-only), or < (date and time)
// If it's anything else, we'll see the problem when we try to get the pattern.
var patternType = pattern.PeekNext();
if (patternType == 'd' || patternType == 't')
{
pattern.MoveNext();
}
string embeddedPatternText = pattern.GetEmbeddedPattern();
switch (patternType)
{
case '<':
{
var sampleBucket = CreateSampleBucket();
var templateTime = timeBucketExtractor(sampleBucket).TemplateValue;
var templateDate = dateBucketExtractor(sampleBucket).TemplateValue;
if (dateTimeExtractor is null)
{
throw new InvalidPatternException(TextErrorMessages.InvalidEmbeddedPatternType);
}
AddField(PatternFields.EmbeddedDate, 'l');
AddField(PatternFields.EmbeddedTime, 'l');
AddEmbeddedPattern(
LocalDateTimePattern.Create(embeddedPatternText, FormatInfo, templateDate + templateTime).UnderlyingPattern,
(bucket, value) =>
{
var dateBucket = dateBucketExtractor(bucket);
var timeBucket = timeBucketExtractor(bucket);
dateBucket.Calendar = value.Calendar;
dateBucket.Year = value.Year;
dateBucket.MonthOfYearNumeric = value.Month;
dateBucket.DayOfMonth = value.Day;
timeBucket.Hours24 = value.Hour;
timeBucket.Minutes = value.Minute;
timeBucket.Seconds = value.Second;
timeBucket.FractionalSeconds = value.NanosecondOfSecond;
},
dateTimeExtractor);
break;
}
case 'd':
AddEmbeddedDatePattern('l', embeddedPatternText, dateBucketExtractor, dateExtractor);
break;
case 't':
AddEmbeddedTimePattern('l', embeddedPatternText, timeBucketExtractor, timeExtractor);
break;
default:
throw new InvalidOperationException("Bug in Noda Time: embedded pattern type wasn't date, time, or date+time");
}
}
public void GetEmbeddedPattern_Invalid(string text)
{
var cursor = new PatternCursor(text);
cursor.MoveNext();
Assert.Throws<InvalidPatternException>(() => cursor.GetEmbeddedPattern());
}
