Package org.pipservices3.expressions.tokenizers.generic

Class SymbolRootNode

java.lang.Object

org.pipservices3.expressions.tokenizers.generic.SymbolNode

org.pipservices3.expressions.tokenizers.generic.SymbolRootNode

public class SymbolRootNode
extends SymbolNode

This class is a special case of a SymbolNode. A SymbolRootNode object has no symbol of its own, but has children that represent all possible symbols.

Constructor Summary

Constructors

Constructor	Description
SymbolRootNode()	Creates and initializes a root node.

Method Summary

Modifier and Type	Method	Description
void	add(String value, TokenType tokenType)	Add the given string as a symbol.
Token	nextToken(IScanner scanner)	Return a symbol string from a scanner.

Methods inherited from class org.pipservices3.expressions.tokenizers.generic.SymbolNode

addDescendantLine, ancestry, deepestRead, ensureChildWithChar, findChildWithChar, getTokenType, getValid, setTokenType, setValid, unreadToValid

Methods inherited from class java.lang.Object

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

Constructor Details

SymbolRootNode

public SymbolRootNode()

Creates and initializes a root node.

Method Details

add

public void add(String value,
 TokenType tokenType)
         throws Exception

Add the given string as a symbol.

Parameters:

value - The character sequence to add.

tokenType -

Throws:

Exception

nextToken

public Token nextToken(IScanner scanner)

Return a symbol string from a scanner.

Parameters:

scanner - A scanner to read from

Returns:

A symbol string from a scanner