org.apache.ignite.internal.sql

Class SqlParserUtils

java.lang.Object

org.apache.ignite.internal.sql.SqlParserUtils

public class SqlParserUtils
extends Object

Parser utility methods.

Method Summary

Modifier and Type	Method and Description
static SqlParseException	error(SqlLexerToken token, String msg) Create parse exception referring to current lexer position.
static SqlParseException	errorUnexpectedToken(SqlLexer lex, String expToken) Create generic parse exception due to unexpected token.
static SqlParseException	errorUnexpectedToken(SqlLexerToken token) Create generic parse exception due to unexpected token.
static SqlParseException	errorUnexpectedToken(SqlLexerToken token, String firstExpToken, String... expTokens) Create generic parse exception due to unexpected token.
static SqlParseException	errorUnsupported(SqlLexerToken token) Error on unsupported keyword.
static void	errorUnsupportedIfMatchesKeyword(SqlLexerToken token, String... keywords) Throw unsupported token exception if one of passed keywords is found.
static void	errorUnsupportedIfMatchesKeyword(SqlLexerToken token, String keyword) Throw unsupported token exception if passed keyword is found.
static boolean	isValidIdentifier(SqlLexerToken token) Check if token is identifier.
static boolean	matchesKeyword(SqlLexerToken token, String expKeyword) Check if current lexer token matches expected.
static boolean	parseBoolean(SqlLexer lex) Parse boolean parameter value based on presence of tokens 1, 0, ON, OFF.
static String	parseIdentifier(SqlLexer lex, String... additionalExpTokens) Process name.
static boolean	parseIfExists(SqlLexer lex) Parse IF EXISTS statement.
static boolean	parseIfNotExists(SqlLexer lex) Parse IF NOT EXISTS statement.
static int	parseInt(SqlLexer lex) Parse integer value (positive or negative).
static SqlQualifiedName	parseQualifiedIdentifier(SqlLexer lex, String... additionalExpTokens) Process qualified name.
static String	parseString(SqlLexer lex, String... additionalExpTokens) Process name.
static String	parseUsername(SqlLexer lex, String... additionalExpTokens) Process name.
static boolean	skipCommaOrRightParenthesis(SqlLexer lex) Skip comma or right parenthesis.
static void	skipIfMatches(SqlLexer lex, SqlLexerTokenType tokenTyp) Skip next token if it matches expected type.
static void	skipIfMatchesKeyword(SqlLexer lex, String expKeyword) Skip token if it matches expected keyword.
static boolean	skipIfMatchesOptionalKeyword(SqlLexer lex, String expKeyword) Skip token if it matches expected keyword by using lookahead.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

parseIfExists

public static boolean parseIfExists(SqlLexer lex)

Parse IF EXISTS statement.

Parameters:

lex - Lexer.

Returns:

True if statement is found.

parseIfNotExists

public static boolean parseIfNotExists(SqlLexer lex)

Parse IF NOT EXISTS statement.

Parameters:

lex - Lexer.

Returns:

True if statement is found.

skipCommaOrRightParenthesis

public static boolean skipCommaOrRightParenthesis(SqlLexer lex)

Skip comma or right parenthesis.

Parameters:

lex - Lexer.

Returns:

True if right parenthesis is found.

parseInt

public static int parseInt(SqlLexer lex)

Parse integer value (positive or negative).

Parameters:

lex - Lexer.

Returns:

Integer value.

parseBoolean

public static boolean parseBoolean(SqlLexer lex)

Parse boolean parameter value based on presence of tokens 1, 0, ON, OFF. Not that this is not and is not intended to be routine for parsing a boolean literal from TRUE/FALSE.

Parameters:

lex - Lexer.

Returns:

Boolean parameter value.

parseIdentifier

public static String parseIdentifier(SqlLexer lex,
                                     String... additionalExpTokens)

Process name.

Parameters:

lex - Lexer.

additionalExpTokens - Additional expected tokens in case of error.

Returns:

Name.

parseUsername

public static String parseUsername(SqlLexer lex,
                                   String... additionalExpTokens)

Process name.

Parameters:

lex - Lexer.

additionalExpTokens - Additional expected tokens in case of error.

Returns:

Name.

parseString

public static String parseString(SqlLexer lex,
                                 String... additionalExpTokens)

Process name.

Parameters:

lex - Lexer.

additionalExpTokens - Additional expected tokens in case of error.

Returns:

Name.

parseQualifiedIdentifier

public static SqlQualifiedName parseQualifiedIdentifier(SqlLexer lex,
                                                        String... additionalExpTokens)

Process qualified name.

Parameters:

lex - Lexer.

additionalExpTokens - Additional expected tokens in case of error.

Returns:

Qualified name.

isValidIdentifier

public static boolean isValidIdentifier(SqlLexerToken token)

Check if token is identifier.

Parameters:

token - Token.

Returns:

True if we are standing on possible identifier.

matchesKeyword

public static boolean matchesKeyword(SqlLexerToken token,
                                     String expKeyword)

Check if current lexer token matches expected.

Parameters:

token - Token..

expKeyword - Expected keyword.

Returns:

True if matches.

skipIfMatchesKeyword

public static void skipIfMatchesKeyword(SqlLexer lex,
                                        String expKeyword)

Skip token if it matches expected keyword.

Parameters:

lex - Lexer.

expKeyword - Expected keyword.

skipIfMatchesOptionalKeyword

public static boolean skipIfMatchesOptionalKeyword(SqlLexer lex,
                                                   String expKeyword)

Skip token if it matches expected keyword by using lookahead. If next token is not what we expect, no shift is done.

Parameters:

lex - Lexer.

expKeyword - Expected keyword.

Returns:

true In case token mathes, false otherwise.

skipIfMatches

public static void skipIfMatches(SqlLexer lex,
                                 SqlLexerTokenType tokenTyp)

Skip next token if it matches expected type.

Parameters:

lex - Lexer.

tokenTyp - Expected token type.

error

public static SqlParseException error(SqlLexerToken token,
                                      String msg)

Create parse exception referring to current lexer position.

Parameters:

token - Token.

msg - Message.

Returns:

Exception.

errorUnexpectedToken

public static SqlParseException errorUnexpectedToken(SqlLexerToken token)

Create generic parse exception due to unexpected token.

Parameters:

token - Token.

Returns:

Exception.

errorUnsupportedIfMatchesKeyword

public static void errorUnsupportedIfMatchesKeyword(SqlLexerToken token,
                                                    String keyword)

Throw unsupported token exception if passed keyword is found.

Parameters:

token - Token.

keyword - Keyword.

errorUnsupportedIfMatchesKeyword

public static void errorUnsupportedIfMatchesKeyword(SqlLexerToken token,
                                                    String... keywords)

Throw unsupported token exception if one of passed keywords is found.

Parameters:

token - Token.

keywords - Keywords.

errorUnsupported

public static SqlParseException errorUnsupported(SqlLexerToken token)

Error on unsupported keyword.

Parameters:

token - Token.

Returns:

Error.

errorUnexpectedToken

public static SqlParseException errorUnexpectedToken(SqlLexer lex,
                                                     String expToken)

Create generic parse exception due to unexpected token.

Parameters:

lex - Lexer.

expToken - Expected token.

Returns:

Exception.

errorUnexpectedToken

public static SqlParseException errorUnexpectedToken(SqlLexerToken token,
                                                     String firstExpToken,
                                                     String... expTokens)

Create generic parse exception due to unexpected token.

Parameters:

token - Token.

firstExpToken - First expected token.

expTokens - Additional expected tokens (if any).

Returns:

Exception.