Package com.sun.tools.javac.parser

Class Scanner

java.lang.Object

com.sun.tools.javac.parser.Scanner

All Implemented Interfaces:

Lexer

public class Scanner
extends Object
implements Lexer

The lexical analyzer maps an input stream consisting of ASCII characters and Unicode escapes into a token sequence.

This is NOT part of any supported API. If you write code that depends on this, you do so at your own risk. This code and its internal interfaces are subject to change or deletion without notice.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Scanner(ScannerFactory fac, char[] buf, int inputLength)
protected	Scanner(ScannerFactory fac, CharBuffer buf) Create a scanner from the input array.
protected	Scanner(ScannerFactory fac, JavaTokenizer tokenizer)

Method Summary

Modifier and Type	Method and Description
int	errPos() Return the position where a lexical error occurred;
void	errPos(int pos) Set the position where a lexical error occurred;
Position.LineMap	getLineMap() Build a map for translating between line numbers and positions in the input.
void	nextToken() Consume the next token.
Tokens.Token	prevToken() Return the last character position of the previous token.
Tokens.Token	split() Splits the current token in two and return the first (splitted) token.
Tokens.Token	token() Return current token.
Tokens.Token	token(int lookahead) Return token with given lookahead.

Methods inherited from class java.lang.Object

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

Constructor Detail

Scanner

protected Scanner(ScannerFactory fac,
                  CharBuffer buf)

Create a scanner from the input array. This method might modify the array. To avoid copying the input array, ensure that inputLength < input.length or input[input.length -1] is a white space character.

Parameters:

fac - the factory which created this Scanner

buf - the input, might be modified Must be positive and less than or equal to input.length.

Scanner

protected Scanner(ScannerFactory fac,
                  char[] buf,
                  int inputLength)

Scanner

protected Scanner(ScannerFactory fac,
                  JavaTokenizer tokenizer)

Method Detail

token

public Tokens.Token token()

Description copied from interface: Lexer

Return current token.

Specified by:

token in interface Lexer

token

public Tokens.Token token(int lookahead)

Description copied from interface: Lexer

Return token with given lookahead.

Specified by:

token in interface Lexer

prevToken

public Tokens.Token prevToken()

Description copied from interface: Lexer

Return the last character position of the previous token.

Specified by:

prevToken in interface Lexer

nextToken

public void nextToken()

Description copied from interface: Lexer

Consume the next token.

Specified by:

nextToken in interface Lexer

split

public Tokens.Token split()

Description copied from interface: Lexer

Splits the current token in two and return the first (splitted) token. For instance '<<<' is split into two tokens '<' and '<<' respectively, and the latter is returned.

Specified by:

split in interface Lexer

getLineMap

public Position.LineMap getLineMap()

Description copied from interface: Lexer

Build a map for translating between line numbers and positions in the input.

Specified by:

getLineMap in interface Lexer

Returns:

a LineMap

errPos

public int errPos()

Description copied from interface: Lexer

Return the position where a lexical error occurred;

Specified by:

errPos in interface Lexer

errPos

public void errPos(int pos)

Description copied from interface: Lexer

Set the position where a lexical error occurred;

Specified by:

errPos in interface Lexer