public void TokenEquality_SameValueAsObject()
{
TSQLKeyword token1 = new TSQLKeyword(0, "GO");
Object token2 = new TSQLKeyword(0, "GO");
Assert.IsTrue(token1.Equals(token2));
}
public void TokenEquality_NotEqualOperator()
{
TSQLKeyword token1 = new TSQLKeyword(0, "GO");
TSQLKeyword token2 = new TSQLKeyword(0, "USE");
Assert.IsTrue(token1 != token2);
}
public void TokenEquality_EqualsOperator()
{
TSQLKeyword token1 = new TSQLKeyword(0, "GO");
TSQLKeyword token2 = new TSQLKeyword(0, "GO");
Assert.IsTrue(token1 == token2);
}
public void TokenEquality_NotEqualOperatorNull()
{
TSQLKeyword token = new TSQLKeyword(0, "GO");
Assert.IsTrue(null != token);
}
public void TokenEquality_EqualsOperatorNull()
{
TSQLKeyword token = new TSQLKeyword(0, "GO");
Assert.IsFalse(null == token);
}
public void TokenEquality_SameToken()
{
TSQLKeyword token = new TSQLKeyword(0, "GO");
Assert.IsTrue(token.Equals(token));
}
public TSQLOrderByClause Parse(IEnumerator <TSQLToken> tokenizer)
{
TSQLOrderByClause orderBy = new TSQLOrderByClause();
TSQLKeyword keyword = tokenizer.Current.AsKeyword;
if (keyword == null ||
keyword.Keyword != TSQLKeywords.ORDER)
{
throw new ApplicationException("ORDER expected.");
}
orderBy.Tokens.Add(keyword);
// subqueries
int nestedLevel = 0;
while (
tokenizer.MoveNext() &&
!(
tokenizer.Current.Type == TSQLTokenType.Character &&
tokenizer.Current.AsCharacter.Character == TSQLCharacters.Semicolon
) &&
!(
nestedLevel == 0 &&
tokenizer.Current.Type == TSQLTokenType.Character &&
tokenizer.Current.AsCharacter.Character == TSQLCharacters.CloseParentheses
) &&
(
nestedLevel > 0 ||
tokenizer.Current.Type != TSQLTokenType.Keyword ||
(
tokenizer.Current.Type == TSQLTokenType.Keyword &&
tokenizer.Current.AsKeyword.Keyword.In
(
TSQLKeywords.BY,
TSQLKeywords.NULL,
TSQLKeywords.CASE,
TSQLKeywords.WHEN,
TSQLKeywords.THEN,
TSQLKeywords.ELSE,
TSQLKeywords.AND,
TSQLKeywords.OR,
TSQLKeywords.BETWEEN,
TSQLKeywords.EXISTS,
TSQLKeywords.END,
TSQLKeywords.IN,
TSQLKeywords.IS,
TSQLKeywords.NOT,
TSQLKeywords.OVER,
TSQLKeywords.LIKE,
TSQLKeywords.ASC,
TSQLKeywords.DESC,
TSQLKeywords.FETCH,
TSQLKeywords.COLLATE
)
)
))
{
orderBy.Tokens.Add(tokenizer.Current);
if (tokenizer.Current.Type == TSQLTokenType.Character)
{
TSQLCharacters character = tokenizer.Current.AsCharacter.Character;
if (character == TSQLCharacters.OpenParentheses)
{
// should we recurse for subqueries?
nestedLevel++;
if (tokenizer.MoveNext())
{
if (
tokenizer.Current.Type == TSQLTokenType.Keyword &&
tokenizer.Current.AsKeyword.Keyword == TSQLKeywords.SELECT)
{
TSQLSelectStatement selectStatement = new TSQLSelectStatementParser().Parse(tokenizer);
orderBy.Tokens.AddRange(selectStatement.Tokens);
if (
tokenizer.Current != null &&
tokenizer.Current.Type == TSQLTokenType.Character &&
tokenizer.Current.AsCharacter.Character == TSQLCharacters.CloseParentheses)
{
nestedLevel--;
orderBy.Tokens.Add(tokenizer.Current);
}
}
else
{
orderBy.Tokens.Add(tokenizer.Current);
}
}
}
else if (character == TSQLCharacters.CloseParentheses)
{
nestedLevel--;
}
}
}
return(orderBy);
}
public void KeywordToken_NoneKeyword()
{
TSQLKeyword token = new TSQLKeyword(0, "blah");
Assert.AreEqual(TSQLKeywords.None, token.Keyword);
}
public void KeywordToken_Keyword()
{
TSQLKeyword token = new TSQLKeyword(0, "go");
Assert.AreEqual(TSQLKeywords.GO, token.Keyword);
}
public TSQLWhereClause Parse(TSQLTokenizer tokenizer)
{
TSQLWhereClause where = new TSQLWhereClause();
TSQLKeyword keyword = tokenizer.Current.AsKeyword;
if (keyword == null ||
keyword.Keyword != TSQLKeywords.WHERE)
{
throw new ApplicationException("WHERE expected.");
}
where.Tokens.Add(keyword);
// subqueries
int nestedLevel = 0;
while (
tokenizer.Read() &&
!(
tokenizer.Current.Type == TSQLTokenType.Character &&
tokenizer.Current.AsCharacter.Character == TSQLCharacters.Semicolon
) &&
!(
nestedLevel == 0 &&
tokenizer.Current.Type == TSQLTokenType.Character &&
tokenizer.Current.AsCharacter.Character == TSQLCharacters.CloseParentheses
) &&
(
nestedLevel > 0 ||
tokenizer.Current.Type != TSQLTokenType.Keyword ||
(
tokenizer.Current.Type == TSQLTokenType.Keyword &&
tokenizer.Current.AsKeyword.Keyword.In
(
TSQLKeywords.NULL,
TSQLKeywords.CASE,
TSQLKeywords.WHEN,
TSQLKeywords.THEN,
TSQLKeywords.ELSE,
TSQLKeywords.AND,
TSQLKeywords.OR,
TSQLKeywords.BETWEEN,
TSQLKeywords.EXISTS,
TSQLKeywords.END,
TSQLKeywords.IN,
TSQLKeywords.IS,
TSQLKeywords.NOT,
TSQLKeywords.LIKE
)
)
))
{
where.Tokens.Add(tokenizer.Current);
if (tokenizer.Current.Type == TSQLTokenType.Character)
{
TSQLCharacters character = tokenizer.Current.AsCharacter.Character;
if (character == TSQLCharacters.OpenParentheses)
{
// should we recurse for subqueries?
nestedLevel++;
if (tokenizer.Read())
{
if (
tokenizer.Current.Type == TSQLTokenType.Keyword &&
tokenizer.Current.AsKeyword.Keyword == TSQLKeywords.SELECT)
{
TSQLSelectStatement selectStatement = new TSQLSelectStatementParser().Parse(tokenizer);
where.Tokens.AddRange(selectStatement.Tokens);
if (
tokenizer.Current != null &&
tokenizer.Current.Type == TSQLTokenType.Character &&
tokenizer.Current.AsCharacter.Character == TSQLCharacters.CloseParentheses)
{
nestedLevel--;
where.Tokens.Add(tokenizer.Current);
}
}
else
{
where.Tokens.Add(tokenizer.Current);
}
}
}
else if (character == TSQLCharacters.CloseParentheses)
{
nestedLevel--;
}
}
}
return(where);
}
