org.postgresql.core
Class Parser

java.lang.Object
  org.postgresql.core.Parser

public class Parser
extends Object

Basic query parser infrastructure.

Author:

Michael Paesold (mpaesold@gmx.at)

Constructor Summary

Parser()

Method Summary

static boolean	charTerminatesIdentifier(char c)
static boolean	isDollarQuoteContChar(char c) Checks if a character is valid as the second or later character of a dollar quoting tag.
static boolean	isDollarQuoteStartChar(char c) Checks if a character is valid as the start of a dollar quoting tag.
static boolean	isIdentifierContChar(char c) Checks if a character is valid as the second or later character of an identifier.
static boolean	isIdentifierStartChar(char c) Checks if a character is valid as the start of an identifier.
static boolean	isOperatorChar(char c)
static boolean	isSpace(char c)
static int	parseBlockComment(char[] query, int offset) Test if the / character at offset starts a block comment, and return the position of the last / character.
static int	parseDollarQuotes(char[] query, int offset) Test if the dollar character ($) at the given offset starts a dollar-quoted string and return the offset of the ending dollar character.
static int	parseDoubleQuotes(char[] query, int offset) Find the end of the double-quoted string starting at the given offset.
static int	parseLineComment(char[] query, int offset) Test if the - character at offset starts a -- style line comment, and return the position of the first \r or \n character.
static int	parseSingleQuotes(char[] query, int offset, boolean standardConformingStrings) Find the end of the single-quoted string starting at the given offset.

Methods inherited from class java.lang.Object

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

Constructor Detail

Parser

public Parser()

Method Detail

parseSingleQuotes

public static int parseSingleQuotes(char[] query,
                                    int offset,
                                    boolean standardConformingStrings)

Find the end of the single-quoted string starting at the given offset. Note: for 'single '' quote in string', this method currently returns the offset of first ' character after the initial one. The caller must call the method a second time for the second part of the quoted string.

parseDoubleQuotes

public static int parseDoubleQuotes(char[] query,
                                    int offset)

Find the end of the double-quoted string starting at the given offset. Note: for "double "" quote in string", this method currently returns the offset of first " character after the initial one. The caller must call the method a second time for the second part of the quoted string.

parseDollarQuotes

public static int parseDollarQuotes(char[] query,
                                    int offset)

Test if the dollar character ($) at the given offset starts a dollar-quoted string and return the offset of the ending dollar character.

parseLineComment

public static int parseLineComment(char[] query,
                                   int offset)

Test if the - character at offset starts a -- style line comment, and return the position of the first \r or \n character.

parseBlockComment

public static int parseBlockComment(char[] query,
                                    int offset)

Test if the / character at offset starts a block comment, and return the position of the last / character.

isSpace

public static boolean isSpace(char c)

Returns:

true if the character is a whitespace character as defined in the backend's parser

isOperatorChar

public static boolean isOperatorChar(char c)

Returns:

true if the given character is a valid character for an operator in the backend's parser

isIdentifierStartChar

public static boolean isIdentifierStartChar(char c)

Checks if a character is valid as the start of an identifier.

Parameters:

c - the character to check

Returns:

true if valid as first character of an identifier; false if not

isIdentifierContChar

public static boolean isIdentifierContChar(char c)

Checks if a character is valid as the second or later character of an identifier.

Parameters:

c - the character to check

Returns:

true if valid as second or later character of an identifier; false if not

charTerminatesIdentifier

public static boolean charTerminatesIdentifier(char c)

Returns:

true if the character terminates an identifier

isDollarQuoteStartChar

public static boolean isDollarQuoteStartChar(char c)

Checks if a character is valid as the start of a dollar quoting tag.

Parameters:

c - the character to check

Returns:

true if valid as first character of a dollar quoting tag; false if not

isDollarQuoteContChar

public static boolean isDollarQuoteContChar(char c)

Checks if a character is valid as the second or later character of a dollar quoting tag.

Parameters:

c - the character to check

Returns:

true if valid as second or later character of a dollar quoting tag; false if not