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Development-Custom Templates

Last modified by Pascal Robert on 2010/09/13 00:27

Petite Abeille

The following solution is more involved than what is strictly needed. It may avoid the debug message, he is using some quasi-private stuff.

It can be quite easy


protected WOElement myTemplate = null;
public WOElement template() {
 if ( myTemplate == null ) {
     myTemplate = WOComponent.templateWithHTMLString( html, wod, null );
  }
 return myTemplate;
}

A More Involved Solution:

Here is a little example on how to overwrite WOComponent.template() so
 you can load the html template and wod from wherever you want )eg a jar
 file):

  • First you will need to overwrite WOComponent.template()

public WOElement template() {
 return Component.templateForComponent( this );
}
  • Now, templateForComponent could look like this:

public static WOElement templateForComponent(WOComponent aComponent) {
if ( aComponent != null ){
 String aName = aComponent.name();
 WOElement anElement = (WOElement) _elementCache.get( aName );
 if ( anElement == null ) {
   String anHTMLString = Component.componentTemplateWithExtension( aComponent, ".html" );
   String aDescriptionString = Component.componentTemplateWithExtension( aComponent, ".wod" );
   anElement = WOComponent.templateWithHTMLString ( anHTMLString, aDescriptionString, null );
   if ( aComponent.isCachingEnabled() == true ) {
     _elementCache.put( aName, anElement );
    }
  }
 return anElement;
}
throw new IllegalArgumentException ( "Component.templateForComponent: null component." );
}
  • The componentTemplateWithExtension method could look like the following:

private static String componentTemplateWithExtension(WOComponent aComponent, String anExtension) {
if ( anExtension != null ) {
 String aResource = aComponent.name() + anExtension;
 InputStream anInputStream = Component.componentStreamForResource( aComponent, aResource );
 if ( anInputStream != null ) {
   StringBuffer aBuffer = new StringBuffer();
   try {
     BufferedInputStream  aBufferedStream = new BufferedInputStream( anInputStream );
     InputStreamReader  aStreamReader = new InputStreamReader( aBufferedStream );
     int aChar = -1;
     while ( ( aChar = aStreamReader.read() ) != -1 ) {
       aBuffer.append( (char) aChar );
      }
       anInputStream.close();
      } catch(Exception anException) {
       Log.warning( anException );
      }
     return aBuffer.toString();
    }
   throw new RuntimeException ( "Component.componentTemplateWithExtension: resource not found: '" +  aResource + "'." );
  }
}
throw new IllegalArgumentException ( "Component.componentTemplateWithExtension: null extension." );
}
  • And finally componentStreamForResource could be something along these:

private static InputStream componentStreamForResource(WOComponent aComponent, String aResource) {
if ( aResource != null ) {
 File aDirectory = new File( System.getProperty( "user.dir" ) );
 File aFile = new File( aDirectory, aResource );
 if ( aFile.exists() == true ) {
   try {
     return new FileInputStream( aFile );
    } catch(Exception anException) {
     Log.warning( anException);
    }
  }
 return aComponent.getClass().getResourceAsStream( aResource );
}
throw new IllegalArgumentException( "Component.componentStreamForResource: null resource." );
}