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

java.lang.Object
  org.apache.velocity.runtime.parser.node.NodeUtils

public class NodeUtils
extends Object

Utilities for dealing with the AST node structure.

Version:

$Id: NodeUtils.java 463298 2006-10-12 16:10:32Z henning $

Author:

Jason van Zyl, Geir Magnusson Jr.

Constructor Summary

NodeUtils()

Method Summary

static String	interpolate(String argStr, Context vars) Utility method to interpolate context variables into string literals.
static String	specialText(Token t) Collect all the s that are carried along with a token.
static String	tokenLiteral(Token t) complete node literal

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeUtils

public NodeUtils()

Method Detail

specialText

public static String specialText(Token t)

Collect all the s that are carried along with a token. Special tokens do not participate in parsing but can still trigger certain lexical actions. In some cases you may want to retrieve these special tokens, this is simply a way to extract them.

Parameters:

t -

Returns:

String with the special tokens.

tokenLiteral

public static String tokenLiteral(Token t)

complete node literal

Parameters:

t -

Returns:

A node literal.

interpolate

public static String interpolate(String argStr,
                                 Context vars)
                          throws MethodInvocationException

Utility method to interpolate context variables into string literals. So that the following will work: #set $name = "candy" $image.getURI("${name}.jpg") And the string literal argument will be transformed into "candy.jpg" before the method is executed.

Parameters:

argStr -

vars -

Returns:

Interpoliation result.

Throws:

MethodInvocationException