Extending jjCode

Extending jjCode is very easy. For each different new command that you wish to add, you must create a thread-safe class extending from org.jjcode.RenderCommand.

In most cases, you need to override only four abstract methods:

• boolean recognized(String token) - which tells the rendering engine whether the token you are being provided is the one that your class is capable of processing.
  
  
• boolean preProcessingAllowed() - which informs the rendering engine whether your command can be pre-processed (i.e. if the rendering result of your command sequence is always the same, regardless of when it is rendered and the user viewing it)
  
  
• StringBuffer render(Node tree,int mode,HashMap info) - which renders the command squence
  
  
• StringBuffer renderControl(String fieldName, String helpFieldName, HashMap info) - which renders an HTML control (usually a button) that can be included in an HTML editor for a text field. Activating this control inserts your sequence in the editing field.

(c) 2006 Alexander Hristov (Planetalia S.L.). jjCode is licensed under the LGPL