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

java.lang.Object
  extended by 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


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