public MountNode(VariableResolver prefix,
    VariableResolver source,
    TreeProcessor parentProcessor,
    boolean checkReload,
    boolean passThrough) 
{
      
        this.prefix = prefix;
        this.source = source;
        this.parentProcessor = parentProcessor;
        this.checkReload = checkReload;
        this.passThrough = BooleanUtils.toBooleanObject(passThrough);
}

 public  void compose(ComponentManager manager) throws ComponentException 
{
        this.manager = manager;
}

 public  void dispose() 
{
        Iterator iter = this.processors.values().iterator();
        while(iter.hasNext()) {
            ((TreeProcessor)iter.next()).dispose();
        }
}

 public final boolean invoke(Environment env,
    InvokeContext context) throws Exception 
{
        final Map objectModel = env.getObjectModel();
        String resolvedSource = this.source.resolve(context, objectModel);
        String resolvedPrefix = this.prefix.resolve(context, objectModel);
        if (resolvedSource.length() == 0) {
            throw new ProcessingException("Source of mount statement is empty");
        }
        TreeProcessor processor = getProcessor(resolvedSource);
        // Save context
        String oldPrefix = env.getURIPrefix();
        String oldURI    = env.getURI();
        String oldContext   = env.getContext();
        Object oldPassThrough = env.getAttribute(COCOON_PASS_THROUGH);
        env.setAttribute(COCOON_PASS_THROUGH, this.passThrough);
        boolean pipelineWasBuilt = false;
        try {
            env.changeContext(resolvedPrefix, resolvedSource);
            if (context.isBuildingPipelineOnly()) {
                // Propagate pipelines
                ProcessingPipeline pp = processor.buildPipeline(env);
                if (pp != null) {
                    context.setProcessingPipeline( pp );
                    pipelineWasBuilt = true;
                }
            } else {
                // Processor will create its own pipelines
                pipelineWasBuilt = processor.process(env);
            }
        } catch(Exception e) {
            // Wrap with our location
            throw ProcessingException.throwLocated("Sitemap: error when calling sub-sitemap", e, getLocation());
        } finally {
            // We restore the context only if no pipeline was built. This allows the pipeline
            // environment to be left unchanged when we go back to ancestor processors.
            // If no pipeline was built, we restore the context, so that the current processor
            // continues executing the sitemap in the correct environment.
            if (!pipelineWasBuilt) {
                env.setContext(oldPrefix, oldURI, oldContext);
            }
            if (oldPassThrough != null) {
                env.setAttribute(COCOON_PASS_THROUGH, oldPassThrough);
            } else {
                env.removeAttribute(COCOON_PASS_THROUGH);
            }
            // Turning recomposing as a test, according to:
            // http://marc.theaimsgroup.com/?t=106802211400005&r=1&w=2
            // Recompose pipelines which may have been recomposed by subsitemap
            // context.recompose(this.manager);
        }
        return pipelineWasBuilt;
}