org.yaml.snakeyaml.scanner

Interface Scanner

All Known Implementing Classes:

ScannerImpl

public interface Scanner

This interface represents an input stream of Tokens.

The parser and the scanner form together the 'Parse' step in the loading process (see chapter 3.1 of the YAML Specification).

See Also:

Token

Method Summary

Modifier and Type	Method and Description
boolean	checkToken(Token.ID... choices) Check if the next token is one of the given types.
Token	getToken() Returns the next token.
Token	peekToken() Return the next token, but do not delete it from the stream.

Method Detail

checkToken

boolean checkToken(Token.ID... choices)

Check if the next token is one of the given types.

Parameters:

choices - token IDs.

Returns:

true if the next token can be assigned to a variable of at least one of the given types. Returns false if no more tokens are available.

Throws:

ScannerException - Thrown in case of malformed input.

peekToken

Token peekToken()

Return the next token, but do not delete it from the stream. The method must be called only after checkToken(org.yaml.snakeyaml.tokens.Token.ID...).

Returns:

The token that will be returned on the next call to getToken()

Throws:

ScannerException - Thrown in case of malformed input.

IndexOutOfBoundsException - if no more token left

getToken

Token getToken()

Returns the next token.

The token will be removed from the stream. (Every invocation of this method must happen after calling checkToken(org.yaml.snakeyaml.tokens.Token.ID...).

Returns:

the coming token

Throws:

ScannerException - Thrown in case of malformed input.

IndexOutOfBoundsException - if no more token left