Package org.apache.commons.jexl2.parser

Class SimpleNode

java.lang.Object

org.apache.commons.jexl2.parser.SimpleNode

All Implemented Interfaces:

Node

Direct Known Subclasses:

JexlNode

public class SimpleNode
extends java.lang.Object
implements Node

A class originally generated by JJTree with the following JavaCCOptions: MULTI=true,NODE_USES_PARSER=true,VISITOR=true,TRACK_TOKENS=false,NODE_PREFIX=AST,NODE_EXTENDS=,NODE_FACTORY= Works around issue https://javacc.dev.java.net/issues/show_bug.cgi?id=227 As soon as this issue if fixed and the maven plugin uses the correct version of Javacc, this class can go away. The technical goal is to ensure every reference made in the parser was to a JexlNode; unfortunately, as in javacc 4.1, it still uses a SimpleNode reference in the generated ParserVisitor. Besides, there is no need to keep the parser around in the node. The functional goal is to a allow a volatile value in the node so it can serve as a last evaluation cache even in multi-threaded executions.

Field Summary

Fields

Modifier and Type	Field	Description
protected JexlNode[]	children	The array of children nodes.
protected int	id	The node type id.
protected JexlNode	parent	The parent node.
protected java.lang.Object	value	volatile value so it can be used as a last evaluation cache.

Constructor Summary

Constructors

Constructor	Description
SimpleNode(int i)	Creates a SimpleNode instance.
SimpleNode(Parser p, int i)	Creates a SimpleNode instance.

Method Summary

Modifier and Type	Method	Description
java.lang.Object	childrenAccept(ParserVisitor visitor, java.lang.Object data)	Accept the visitor on all this node's children.
void	dump(java.lang.String prefix)
int	getId()
java.lang.Object	jjtAccept(ParserVisitor visitor, java.lang.Object data)	Accept the visitor.
void	jjtAddChild(Node n, int i)	Adds a child node.
void	jjtClose()	This method is called after all the child nodes have been added.
JexlNode	jjtGetChild(int i)	Gets a child of this node.
int	jjtGetNumChildren()	Gets this node number of children.
JexlNode	jjtGetParent()	Gets this node's parent.
java.lang.Object	jjtGetValue()	Gets this node value.
void	jjtOpen()	This method is called after the node has been made the current node.
void	jjtSetParent(Node n)	Sets this node's parent.
void	jjtSetValue(java.lang.Object value)	Sets this node value.
java.lang.String	toString()
java.lang.String	toString(java.lang.String prefix)

Methods inherited from class java.lang.Object

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

Field Detail

parent

protected JexlNode parent

The parent node.

children

protected JexlNode[] children

The array of children nodes.

id

protected final int id

The node type id.

value

protected volatile java.lang.Object value

volatile value so it can be used as a last evaluation cache.

Constructor Detail

SimpleNode

public SimpleNode(int i)

Creates a SimpleNode instance.

Parameters:

i - the node type identifier

SimpleNode

public SimpleNode(Parser p,
                  int i)

Creates a SimpleNode instance.

Parameters:

p - the parser instance

i - the node type identifier

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.

Specified by:

jjtOpen in interface Node

jjtClose

public void jjtClose()

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

Specified by:

jjtClose in interface Node

jjtSetParent

public void jjtSetParent(Node n)

Sets this node's parent.

Specified by:

jjtSetParent in interface Node

Parameters:

n - the parent

jjtGetParent

public JexlNode jjtGetParent()

Gets this node's parent.

Specified by:

jjtGetParent in interface Node

Returns:

the parent node

jjtAddChild

public void jjtAddChild(Node n,
                        int i)

Adds a child node.

Specified by:

jjtAddChild in interface Node

Parameters:

n - the child node

i - the child offset

jjtGetChild

public JexlNode jjtGetChild(int i)

Gets a child of this node.

Specified by:

jjtGetChild in interface Node

Parameters:

i - the child offset

Returns:

the child node

jjtGetNumChildren

public int jjtGetNumChildren()

Gets this node number of children.

Specified by:

jjtGetNumChildren in interface Node

Returns:

the number of children

jjtSetValue

public void jjtSetValue(java.lang.Object value)

Sets this node value.

Parameters:

value -

jjtGetValue

public java.lang.Object jjtGetValue()

Gets this node value.

Returns:

value

jjtAccept

public java.lang.Object jjtAccept(ParserVisitor visitor,
                                  java.lang.Object data)

Accept the visitor.

Specified by:

jjtAccept in interface Node

Parameters:

visitor - the visitor

data - contextual data

Returns:

result of visit

childrenAccept

public java.lang.Object childrenAccept(ParserVisitor visitor,
                                       java.lang.Object data)

Accept the visitor on all this node's children.

Parameters:

visitor - the visitor

data - contextual data

Returns:

result of visit

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

toString

public java.lang.String toString(java.lang.String prefix)

dump

public void dump(java.lang.String prefix)

getId

public int getId()

Specified by:

getId in interface Node