org.apache.velocity.runtime.parser.node

Interface Node

public interface Node

All AST nodes must implement this interface. It provides basic machinery for constructing the parent and child relationships between nodes.

Method Summary
Object	childrenAccept(ParserVisitor visitor, Object data)
boolean	evaluate(InternalContextAdapter context)
Object	execute(Object o, InternalContextAdapter context)
int	getColumn()
Token	getFirstToken()
int	getInfo()
Token	getLastToken()
int	getLine()
int	getType()
Object	init(InternalContextAdapter context, Object data)
boolean	isInvalid()
Object	jjtAccept(ParserVisitor visitor, Object data) Accept the visitor.
void	jjtAddChild(Node n, int i) This method tells the node to add its argument to the node's list of children.
void	jjtClose() This method is called after all the child nodes have been added.
Node	jjtGetChild(int i) This method returns a child node.
int	jjtGetNumChildren() Return the number of children the node has.
Node	jjtGetParent()
void	jjtOpen() This method is called after the node has been made the current node.
void	jjtSetParent(Node n) This pair of methods are used to inform the node of its parent.
String	literal()
boolean	render(InternalContextAdapter context, Writer writer)
void	setInfo(int info)
void	setInvalid()
Object	value(InternalContextAdapter context)

Method Detail

childrenAccept

public Object childrenAccept(ParserVisitor visitor, Object data)

evaluate

public boolean evaluate(InternalContextAdapter context)

execute

public Object execute(Object o, InternalContextAdapter context)

getColumn

public int getColumn()

getFirstToken

public Token getFirstToken()

getInfo

public int getInfo()

getLastToken

public Token getLastToken()

getLine

public int getLine()

getType

public int getType()

init

public Object init(InternalContextAdapter context, Object data)

isInvalid

public boolean isInvalid()

jjtAccept

public Object jjtAccept(ParserVisitor visitor, Object data)

Accept the visitor. *

jjtAddChild

public void jjtAddChild(Node n, int i)

This method tells the node to add its argument to the node's list of children.

jjtClose

public void jjtClose()

This method is called after all the child nodes have been added.

jjtGetChild

public Node jjtGetChild(int i)

This method returns a child node. The children are numbered from zero, left to right.

jjtGetNumChildren

public int jjtGetNumChildren()

Return the number of children the node has.

jjtGetParent

public Node jjtGetParent()

jjtOpen

public void jjtOpen()

This method is called after the node has been made the current node. It indicates that child nodes can now be added to it.

jjtSetParent

public void jjtSetParent(Node n)

This pair of methods are used to inform the node of its parent.

literal

public String literal()

render

public boolean render(InternalContextAdapter context, Writer writer)

setInfo

public void setInfo(int info)

setInvalid

public void setInvalid()

value

public Object value(InternalContextAdapter context)

Copyright B) 2002 Apache Software Foundation. All Rights Reserved.