org.apache.olingo.server.core.uri.parser

Class UriTokenizer

java.lang.Object

org.apache.olingo.server.core.uri.parser.UriTokenizer

public class UriTokenizer
extends Object

Simple OData URI tokenizer that works on a given string by keeping an index.

As far as feasible, it tries to work on character basis, assuming this to be faster than string operations. Since only the index is "moved", backing out while parsing a token is easy and used throughout. There is intentionally no method to push back tokens (although it would be easy to add such a method) because this tokenizer should behave like a classical token-consuming tokenizer. There is, however, the possibility to save the current state and return to it later.

Whitespace is not an extra token but consumed with the tokens that require whitespace. Optional whitespace is not supported.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	UriTokenizer.TokenKind

Constructor Summary

Constructors

Constructor and Description
UriTokenizer(String parseString)

Method Summary

Modifier and Type	Method and Description
String	getText() Returns the string value corresponding to the last successful next(TokenKind) call.
boolean	next(UriTokenizer.TokenKind allowedTokenKind) Tries to find a token of the given token kind at the current index.
void	returnToSavedState() Return to the previously saved state.
void	saveState() Save the current state.

Methods inherited from class java.lang.Object

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

Constructor Detail

UriTokenizer

public UriTokenizer(String parseString)

Method Detail

saveState

public void saveState()

Save the current state.

See Also:

returnToSavedState()

returnToSavedState

public void returnToSavedState()

Return to the previously saved state.

See Also:

saveState()

getText

public String getText()

Returns the string value corresponding to the last successful next(TokenKind) call.

next

public boolean next(UriTokenizer.TokenKind allowedTokenKind)

Tries to find a token of the given token kind at the current index. The order in which this method is called with different token kinds is important, not only for performance reasons but also if tokens can start with the same characters (e.g., a qualified name starts with an OData identifier). The index is advanced to the end of this token if the token is found.

Parameters:

allowedTokenKind - the kind of token to expect

Returns:

true if the token is found; false otherwise

See Also:

getText()