org.apache.commons.jexl.parser
Class  ASTArrayAccess
java.lang.Object
  |
  +--org.apache.commons.jexl.parser.SimpleNode
        |
        +--org.apache.commons.jexl.parser.ASTArrayAccess
- All Implemented Interfaces: 
- Node
- public class ASTArrayAccess- extends SimpleNode
Like an ASTIdentifier, but with array access allowed.
 
 $foo[2]
- Version: 
- $Id: ASTArrayAccess.java 398180 2006-04-29 15:40:35Z dion $
 
 
 
| Methods inherited from class org.apache.commons.jexl.parser.SimpleNode | 
| childrenAccept, dump, interpret, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, setValue, toString, toString | 
 
 
ASTArrayAccess
public ASTArrayAccess(int id)
- Create the node given an id.- 
- Parameters:
- id- node id.
 
ASTArrayAccess
public ASTArrayAccess(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)
 
execute
public Object execute(Object obj,
                      JexlContext jc)
               throws Exception
- evaluate array access upon a base object.
 
 foo.bar[2]
 
 makes me rethink the array operator :)- 
- Overrides:
- executein class- SimpleNode
 
- 
- Parameters:
- jc- the- JexlContextto evaluate against.
- obj- not used.
- Returns:
- the value of the array expression.
- Throws:
- Exception- on any error
 
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.
 
evaluateExpr
public static Object evaluateExpr(Object o,
                                  Object loc)
                           throws Exception
- Evaluate the Array expression 'loc' on the given object, o.
 e.g. in 'a[2]', 2is 'loc' andais 'o'.
 
 If o or loc are null, null is returned.
 If o is a Map, o.get(loc) is returned.
 If o is a List, o.get(loc) is returned. loc must resolve to an int value.
 If o is an Array, o[loc] is returned. loc must resolve to an int value.
 Otherwise loc is treated as a bean property of o.
- 
- Parameters:
- o- an object to be accessed using the array operator or '.' operator.
- loc- the index of the object to be returned.
- Returns:
- the resulting value.
- Throws:
- Exception- on any error.
 
getIdentifierString
public String getIdentifierString()
- Gets the variable name piece of the expression.- 
- Returns:
- a String of the identifer.
- See Also: 
- ASTIdentifier.getIdentifierString().
 
Copyright © 2003-2006 The Apache Software Foundation. All Rights Reserved.