org.apache.velocity.runtime.parser.node

Class ASTIndex

java.lang.Object

org.apache.velocity.runtime.parser.node.SimpleNode

org.apache.velocity.runtime.parser.node.ASTIndex

All Implemented Interfaces:

Node, Renderable

public class ASTIndex
extends SimpleNode

This node is responsible for the bracket notation at the end of a reference, e.g., $foo[1]

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	strictRef Indicates if we are running in strict reference mode.

Fields inherited from class org.apache.velocity.runtime.parser.node.SimpleNode

children, column, first, firstImage, id, info, invalid, last, lastImage, line, literal, log, parent, parser, rsvc, state, template

Constructor Summary

Constructors

Constructor and Description
ASTIndex(int i)
ASTIndex(Parser p, int i)

Method Summary

Modifier and Type	Method and Description
static Object	adjMinusIndexArg(Object argument, Object o, InternalContextAdapter context, SimpleNode node) If argument is an Integer and negative, then return (o.size() - argument).
Object	execute(Object o, InternalContextAdapter context)
Object	init(InternalContextAdapter context, Object data)

Methods inherited from class org.apache.velocity.runtime.parser.node.SimpleNode

childrenAccept, cleanupParserAndTokens, dump, dump, dump, evaluate, getColumn, getFirstToken, getFirstTokenImage, getInfo, getLastToken, getLastTokenImage, getLine, getLocation, getParser, getRuntimeServices, getTemplate, getTemplateName, getType, isInvalid, jjtAccept, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, literal, render, saveTokenImages, setFirstToken, setInfo, setInvalid, toString, toString, value

Methods inherited from class java.lang.Object

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

Field Detail

strictRef

protected boolean strictRef

Indicates if we are running in strict reference mode.

Constructor Detail

ASTIndex

public ASTIndex(int i)

Parameters:

i -

ASTIndex

public ASTIndex(Parser p,
                int i)

Parameters:

p -

i -

Method Detail

init

public Object init(InternalContextAdapter context,
                   Object data)
            throws TemplateInitException

Specified by:

init in interface Node

Overrides:

init in class SimpleNode

Parameters:

context -

data -

Returns:

data

Throws:

TemplateInitException

See Also:

Node.init(org.apache.velocity.context.InternalContextAdapter, java.lang.Object)

adjMinusIndexArg

public static Object adjMinusIndexArg(Object argument,
                                      Object o,
                                      InternalContextAdapter context,
                                      SimpleNode node)

If argument is an Integer and negative, then return (o.size() - argument). Otherwise return the original argument. We use this to calculate the true index of a negative index e.g., $foo[-1]. If no size() method is found on the 'o' object, then we throw an VelocityException.

Parameters:

argument -

o -

context - Used to access the method cache.

node - ASTNode used for error reporting.

Returns:

found object

execute

public Object execute(Object o,
                      InternalContextAdapter context)
               throws MethodInvocationException

Specified by:

execute in interface Node

Overrides:

execute in class SimpleNode

Parameters:

o -

context -

Returns:

object value

Throws:

MethodInvocationException

See Also:

Node.execute(java.lang.Object, org.apache.velocity.context.InternalContextAdapter)