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

java.lang.Object
  extended by org.apache.velocity.runtime.parser.node.SimpleNode
      extended by 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)


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