Package org.pipservices3.expressions.tokenizers.generic

Class SymbolNode

java.lang.Object

org.pipservices3.expressions.tokenizers.generic.SymbolNode

Direct Known Subclasses:

SymbolRootNode

public class SymbolNode
extends Object

Constructor Summary

Constructors

Constructor	Description
SymbolNode(SymbolNode parent, int character)	Constructs a SymbolNode with the given parent, representing the given character.

Method Summary

Modifier and Type	Method	Description
void	addDescendantLine(String value, TokenType tokenType)	Add a line of descendants that represent the characters in the given string.
String	ancestry()	Show the symbol this node represents.
SymbolNode	deepestRead(IScanner scanner)	Find the descendant that takes as many characters as possible from the input.
SymbolNode	ensureChildWithChar(int value)	Find or create a child for the given character.
SymbolNode	findChildWithChar(int value)	Find a child with the given character.
TokenType	getTokenType()
boolean	getValid()
void	setTokenType(TokenType value)
void	setValid(boolean value)
SymbolNode	unreadToValid(IScanner scanner)	Unwind to a valid node; this node is "valid" if its ancestry represents a complete symbol.

Methods inherited from class java.lang.Object

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

Constructor Detail

SymbolNode

public SymbolNode(SymbolNode parent,
                  int character)

Constructs a SymbolNode with the given parent, representing the given character.

Parameters:

parent - This node's parent

character - This node's associated character.

Method Detail

ensureChildWithChar

public SymbolNode ensureChildWithChar(int value)
                               throws Exception

Find or create a child for the given character.

Parameters:

value -

Throws:

Exception

addDescendantLine

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

Add a line of descendants that represent the characters in the given string.

Parameters:

value -

tokenType -

Throws:

Exception

deepestRead

public SymbolNode deepestRead(IScanner scanner)

Find the descendant that takes as many characters as possible from the input.

Parameters:

scanner -

findChildWithChar

public SymbolNode findChildWithChar(int value)

Find a child with the given character.

Parameters:

value -

unreadToValid

public SymbolNode unreadToValid(IScanner scanner)

Unwind to a valid node; this node is "valid" if its ancestry represents a complete symbol. If this node is not valid, put back the character and ask the parent to unwind.

Parameters:

scanner -

getValid

public boolean getValid()

setValid

public void setValid(boolean value)

getTokenType

public TokenType getTokenType()

setTokenType

public void setTokenType(TokenType value)

ancestry

public String ancestry()

Show the symbol this node represents.

Returns:

The symbol this node represents.