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oracle.javatools.parser.plsql.syntax
Class SqlPlsqlLexer

java.lang.Object
oracle.javatools.parser.AbstractLexer
oracle.javatools.parser.plsql.syntax.SqlPlsqlLexer

All Implemented Interfaces:

Lexer, SqlTokens

public class SqlPlsqlLexer

extends AbstractLexer

The SqlPlsqlLexer is used by the code editor only to highlight both the sql and plsql keywords.

Nested Class Summary

protected static class

BaseSqlLexer.Context

Nested classes/interfaces inherited from class oracle.javatools.parser.AbstractLexer

AbstractLexer.DefaultLexerToken

Field Summary

protected static int	CONTEXT_SIZE The number of elements in the int[] context.
protected int	endOffset The ending offset of the last token found.
protected int	hash If lastToken is TK_IDENTIFIER or is in the keywordTable, then this will be the token's hash value.
static int	KW_base
protected int	lastToken The last token found from lex() operation.
protected int	startOffset The starting offset of the last token found.
protected static int	TK_NOT_FOUND To resolve compiler ambiguity.

Fields inherited from class oracle.javatools.parser.AbstractLexer

currentPos, textBuffer

Fields inherited from interface oracle.javatools.parser.plsql.SqlTokens

OP_AMPERSAND, OP_ARROW, OP_ASSIGN, OP_ATSIGN, OP_base, OP_CAT, OP_COLON, OP_COMMA, OP_DBLDOT, OP_DOT, OP_ELLIPSIS, OP_EQUAL, OP_EXP, OP_GREATER, OP_GTEQL, OP_L_LBL, OP_LBRKT, OP_LESS, OP_LPAREN, OP_LTEQ, OP_max, OP_MINUS, OP_NOTEQL1, OP_NOTEQL2, OP_NOTEQL3, OP_NOTEQL4, OP_OR, OP_OUTERJOIN, OP_PERCENT, OP_PLUS, OP_R_LBL, OP_RBRKT, OP_RPAREN, OP_SEMICLN, OP_SHRIEK, OP_SLASH, OP_STAR, OP_words, TK_BIND_VAR, TK_EOS, TK_IDENTIFIER, TK_invalid, TK_INVALID, TK_MULTI_COMMENT, TK_N, TK_QUOTED_IDENTIFIER, TK_SINGLE_COMMENT, TK_STRING

Fields inherited from interface oracle.javatools.parser.Lexer

TK_EOF

Constructor Summary

SqlPlsqlLexer()
Constructs a default SqlPlsqlLexer with a starting position of 0.

Method Summary

void	backup() Unlexes the last found token.
static boolean	isDecimalDigit(char digit) Utility routine to check whether the given digit is a decimal digit.
int	lex(LexerToken lexedToken) Scans the text buffer at the current position and returns the token that was found.
protected void	restore_context(BaseSqlLexer.Context context)
protected void	save_context(BaseSqlLexer.Context context)
void	setSkipComments(boolean skipComments) Sets whether the PlsqlLexer should generate tokens for Java comments.
protected void	skipQuotedStringLiteral() Skip an alternatively quoted string literal, syntax introduced in Database 10gR1.
protected void	skipStringLiteral() Utility routine which scans through the text buffer to find the end of the string literal.

Methods inherited from class oracle.javatools.parser.AbstractLexer

createLexerToken, getTextBuffer, setPosition, setTextBuffer

Methods inherited from class java.lang.Object

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

Field Detail

KW_base

public static final int KW_base

See Also:

Constant Field Values

CONTEXT_SIZE

protected static final int CONTEXT_SIZE

The number of elements in the int[] context.

See Also:

Constant Field Values

TK_NOT_FOUND

protected static final int TK_NOT_FOUND

To resolve compiler ambiguity.

See Also:

Constant Field Values

lastToken

protected int lastToken

The last token found from lex() operation.

startOffset

protected int startOffset

The starting offset of the last token found.

endOffset

protected int endOffset

The ending offset of the last token found.

hash

protected int hash

If lastToken is TK_IDENTIFIER or is in the keywordTable, then this will be the token's hash value.

Constructor Detail

SqlPlsqlLexer

public SqlPlsqlLexer()

Constructs a default SqlPlsqlLexer with a starting position of 0. Clients must call setTextBuffer() to initialize the text buffer used for the Lexer. To start lexing from an offset other than 0, call setPosition().

Method Detail

setSkipComments

public void setSkipComments(boolean skipComments)

Sets whether the PlsqlLexer should generate tokens for Java comments.

Parameters:

skipComments - true to ignore comments in token generation

lex

public int lex(LexerToken lexedToken)

Scans the text buffer at the current position and returns the token that was found. The token and offset information is also stored in the lexedToken instance passed in to the call.

Specified by:

lex in interface Lexer

Specified by:

lex in class AbstractLexer

Parameters:

lexedToken - the instance passed in where token info is stored

Returns:

the token that was found, same as calling lexedToken.getToken() (for convenience)

backup

public void backup()

Unlexes the last found token. The next call to lex() will return the last token and offset information found.

Specified by:

backup in interface Lexer

Specified by:

backup in class AbstractLexer

skipStringLiteral

protected final void skipStringLiteral()

Utility routine which scans through the text buffer to find the end of the string literal. Sets the current position on the character after the trailing ('), or on the end of line character.

skipQuotedStringLiteral

protected final void skipQuotedStringLiteral()

Skip an alternatively quoted string literal, syntax introduced in Database 10gR1.

isDecimalDigit

public static boolean isDecimalDigit(char digit)

Utility routine to check whether the given digit is a decimal digit.

Parameters:

digit - the digit to check

save_context

protected void save_context(BaseSqlLexer.Context context)

restore_context

protected void restore_context(BaseSqlLexer.Context context)

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