org.apache.commons.jexl.parser
Class  ASTReference
java.lang.Object
  |
  +--org.apache.commons.jexl.parser.SimpleNode
        |
        +--org.apache.commons.jexl.parser.ASTReference
- All Implemented Interfaces: 
- Node
- 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 | rootfirst variable in the expression.
 | 
 
 
 
 
| Methods inherited from class org.apache.commons.jexl.parser.SimpleNode | 
| childrenAccept, dump, interpret, jjtAddChild, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, setValue, toString, toString | 
 
 
root
protected SimpleNode root
- first variable in the expression.
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.
 
jjtAccept
public Object jjtAccept(ParserVisitor visitor,
                        Object data)
- {@inheritDoc}- 
- Overrides:
- jjtAcceptin class- SimpleNode
 
- Following copied from class: org.apache.commons.jexl.parser.SimpleNode
- 
- Parameters:
- visitor- a- ParserVisitor.
- data- data to be passed along to the visitor.
- Returns:
- the value from visiting.
- See Also: 
- ParserVisitor.visit(org.apache.commons.jexl.parser.SimpleNode, java.lang.Object)
 
value
public Object value(JexlContext jc)
             throws Exception
- {@inheritDoc}- 
- Overrides:
- valuein class- SimpleNode
 
- Following copied from class: org.apache.commons.jexl.parser.SimpleNode
- 
- Parameters:
- context- the context to retrieve values from.
- Returns:
- the value of the node.
- Throws:
- Exception- when evaluating the operands fails.
 
jjtClose
public void jjtClose()
- Store the first child as root.
- 
- Overrides:
- jjtClosein class- SimpleNode
 
execute
public Object execute(Object obj,
                      JexlContext jc)
               throws Exception
- 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.- 
- Overrides:
- executein class- SimpleNode
 
- 
- Parameters:
- jc- the- JexlContextto 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()
                     throws Exception
- Gets the variable name of root.
- 
- Returns:
- the identifier.
- Throws:
- Exception- on any error
- See Also: 
- ASTIdentifier.getIdentifierString(),- ASTArrayAccess.getIdentifierString()
 
Copyright © 2003-2006 The Apache Software Foundation. All Rights Reserved.