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

java.lang.Object
  |
  +--org.apache.velocity.runtime.parser.node.SimpleNode
        |
        +--org.apache.velocity.runtime.parser.node.ASTMethod

All Implemented Interfaces:

Node

public class ASTMethod

extends SimpleNode

ASTMethod.java Method support for references : $foo.method() NOTE : introspection is now done at render time. Please look at the Parser.jjt file which is what controls the generation of this class.

Version:

$Id: ASTMethod.java,v 1.21.2.1 2002/05/09 03:17:03 geirm Exp $

Author:

Jason van Zyl, Geir Magnusson Jr.

Field Summary

private java.lang.String	methodName
private int	paramCount

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

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

Constructor Summary

ASTMethod(int id)

ASTMethod(Parser p, int id)

Method Summary

private java.lang.reflect.Method	doIntrospection(InternalContextAdapter context, java.lang.Class data, java.lang.Object[] params) does the instrospection of the class for the method needed.
java.lang.Object	execute(java.lang.Object o, InternalContextAdapter context) invokes the method.
java.lang.Object	init(InternalContextAdapter context, java.lang.Object data) simple init - init our subtree and get what we can from the AST
java.lang.Object	jjtAccept(ParserVisitor visitor, java.lang.Object data) Accept the visitor.

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

childrenAccept, dump, evaluate, getColumn, getFirstToken, getInfo, getLastToken, getLine, getType, isInvalid, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, literal, render, setFirstToken, setInfo, setInvalid, toString, value

Methods inherited from class java.lang.Object

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

Field Detail

methodName

private java.lang.String methodName

paramCount

private int paramCount

Constructor Detail

ASTMethod

public ASTMethod(int id)

ASTMethod

public ASTMethod(Parser p,
                 int id)

Method Detail

jjtAccept

public java.lang.Object jjtAccept(ParserVisitor visitor,
                                  java.lang.Object data)

Accept the visitor.

Overrides:

jjtAccept in class SimpleNode

init

public java.lang.Object init(InternalContextAdapter context,
                             java.lang.Object data)
                      throws java.lang.Exception

simple init - init our subtree and get what we can from the AST

Overrides:

init in class SimpleNode

doIntrospection

private java.lang.reflect.Method doIntrospection(InternalContextAdapter context,
                                                 java.lang.Class data,
                                                 java.lang.Object[] params)
                                          throws MethodInvocationException,
                                                 java.lang.Exception

does the instrospection of the class for the method needed. Note, as this calls value() on the args if any, this must only be called at execute() / render() time

execute

public java.lang.Object execute(java.lang.Object o,
                                InternalContextAdapter context)
                         throws MethodInvocationException

invokes the method. Returns null if a problem, the actual return if the method returns something, or an empty string "" if the method returns void

Overrides:

execute in class SimpleNode