org.apache.commons.jexl.parser
Interface Node

All Known Implementing Classes:

SimpleNode

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	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() Gets the number of children the node has.
Node	jjtGetParent() Gets the parent node.
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.

Method Detail

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.

jjtClose

public void jjtClose()

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

jjtSetParent

public void jjtSetParent(Node n)

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

Parameters:

n - the parent node.

jjtGetParent

public Node jjtGetParent()

Gets the parent node.

Returns:

the parent to this node.

jjtAddChild

public void jjtAddChild(Node n,
                        int i)

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

Parameters:

n - the child node to add

i - the index to add it at.

jjtGetChild

public Node jjtGetChild(int i)

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

Parameters:

i - the index of the child to get.

Returns:

the child at the given index.

jjtGetNumChildren

public int jjtGetNumChildren()

Gets the number of children the node has.

Returns:

the number of children the node has.

jjtAccept

public Object jjtAccept(ParserVisitor visitor,
                        Object data)

Accept the visitor.

Parameters:

data - arbitrary data.

visitor - the visitor.

Returns:

the result of the visit.