org.apache.commons.jexl.parser

Class ASTReference

public class ASTReference extends SimpleNode

reference - any variable expression.

Version: $Id: ASTReference.java 398272 2006-04-30 03:14:01Z dion $

Field Summary
protected SimpleNode	root first variable in the expression.

Constructor Summary
	ASTReference(int id) Create the node given an id.
	ASTReference(Parser p, int id) Create a node with the given parser and id.

Method Summary
Object	execute(Object obj, JexlContext jc) evaluate each piece of the reference. e.g. foo.bar.woogie[2].name, foo is our 'root', and we need to evaluate 'bar.woogie[2].name' relative to foo.
String	getRootString() Gets the variable name of `root`.
Object	jjtAccept(ParserVisitor visitor, Object data)
void	jjtClose() Store the first child as `root`.
Object	value(JexlContext jc)

Field Detail

root

protected SimpleNode root

first variable in the expression.

Constructor Detail

ASTReference

public ASTReference(int id)

Create the node given an id.

Parameters: id node id.

ASTReference

public ASTReference(Parser p, int id)

Create a node with the given parser and id.

Parameters: p a parser. id node id.

Method Detail

execute

public Object execute(Object obj, JexlContext jc)

evaluate each piece of the reference. e.g. foo.bar.woogie[2].name, foo is our 'root', and we need to evaluate 'bar.woogie[2].name' relative to foo.

Parameters: jc the JexlContext to evaluate against. obj not used. root.value(jc) is used instead.

Returns: the value of the array expression.

Throws: Exception on any error

getRootString

public String getRootString()

Gets the variable name of root.

Returns: the identifier.

Throws: Exception on any error

See Also: getIdentifierString getIdentifierString

jjtAccept

public Object jjtAccept(ParserVisitor visitor, Object data)

{@inheritDoc }

jjtClose

public void jjtClose()

Store the first child as root.

value

public Object value(JexlContext jc)

{@inheritDoc }

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