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Java Source Code / Java Documentation » Template Engine » Velocity » org.apache.velocity.app 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.apache.velocity.app.FieldMethodizer

FieldMethodizer
public class FieldMethodizer (Code)

This is a small utility class allow easy access to static fields in a class, such as string constants. Velocity will not introspect for class fields (and won't in the future :), but writing setter/getter methods to do this really is a pain, so use this if you really have to access fields.

The idea it so enable access to the fields just like you would in Java. For example, in Java, you would access a static field like

 MyClass.STRING_CONSTANT
 
and that is the same thing we are trying to allow here.

So to use in your Java code, do something like this :

 context.put("runtime", new FieldMethodizer( "org.apache.velocity.runtime.Runtime" ));
 
and then in your template, you can access any of your static fields in this way :
 $runtime.COUNTER_NAME
 

Right now, this class only methodizes public static fields. It seems that anything else is too dangerous. This class is for convenience accessing 'constants'. If you have fields that aren't static it may be better to handle them by explicitly placing them into the context.
author:
   Geir Magnusson Jr.
version:
   $Id: FieldMethodizer.java 463298 2006-10-12 16:10:32Z henning $




Constructor Summary
public  FieldMethodizer()
     Allow object to be initialized without any data.
public  FieldMethodizer(String s)
     Constructor that takes as it's arg the name of the class to methodize.
public  FieldMethodizer(Object o)
     Constructor that takes as it's arg a living object to methodize.

Method Summary
public  voidaddObject(String s)
    
public  voidaddObject(Object o)
    
public  Objectget(String fieldName)
     Accessor method to get the fields by name.


Constructor Detail
FieldMethodizer
public FieldMethodizer()(Code)
Allow object to be initialized without any data. You would use addObject() to add data later.



FieldMethodizer
public FieldMethodizer(String s)(Code)
Constructor that takes as it's arg the name of the class to methodize.
Parameters:
  s - Name of class to methodize.



FieldMethodizer
public FieldMethodizer(Object o)(Code)
Constructor that takes as it's arg a living object to methodize. Note that it will still only methodized the public static fields of the class.
Parameters:
  o - Name of class to methodize.




Method Detail
addObject
public void addObject(String s) throws Exception(Code)
Add the Name of the class to methodize
Parameters:
  s -
throws:
  Exception -



addObject
public void addObject(Object o) throws Exception(Code)
Add an Object to methodize
Parameters:
  o -
throws:
  Exception -



get
public Object get(String fieldName)(Code)
Accessor method to get the fields by name.
Parameters:
  fieldName - Name of static field to retrieve The value of the given field.



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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