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

protected boolean

strictRef Indicates if we are running in strict reference mode.

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

children, first, id, info, invalid, last, log, parent, parser, rsvc, state, templateName

Constructor Summary

ASTIndex(int i)

ASTIndex(Parser p, int i)

Method Summary

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, dump, evaluate, getColumn, getFirstToken, getInfo, getLastToken, getLine, getLocation, getRuntimeServices, getTemplateName, getType, isInvalid, jjtAccept, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, literal, render, 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)

ASTIndex

public ASTIndex(Parser p,
                int i)

Method Detail

init

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

Specified by:

init in interface Node

Overrides:

init in class SimpleNode

Returns:

The init result.

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:

context - Used to access the method cache.

node - ASTNode used for error reporting.

execute

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

Specified by:

execute in interface Node

Overrides:

execute in class SimpleNode

Returns:

The execution result.

Throws:

MethodInvocationException

See Also:

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