public PreparableMatchNode(String type,
    String pattern,
    String name) throws PatternException 
{
        super(type);
        this.pattern = pattern;
        this.name = name;
}

 public  void compose(ComponentManager manager) throws ComponentException 
{
        this.manager = manager;
        setSelector((ComponentSelector)manager.lookup(Matcher.ROLE + "Selector"));
        // Prepare the pattern, and keep matcher if ThreadSafe
        PreparableMatcher matcher = (PreparableMatcher)selector.select(componentName);
        if (matcher instanceof ThreadSafe) {
            this.threadSafeMatcher = matcher;
        }
        try {
            this.preparedPattern = matcher.preparePattern(this.pattern);
        } catch(PatternException pe) {
            String msg = "Invalid pattern '" + this.pattern + "' for matcher at " + this.getLocation();
            throw new ComponentException(null, msg, pe);
        } finally {
            if (this.threadSafeMatcher == null) {
                selector.release(matcher);
            }
        }
}

 public  void dispose() 
{
        if (this.threadSafeMatcher != null) {
            selector.release(this.threadSafeMatcher);
            this.threadSafeMatcher = null;
        }
        if (this.selector != null) {
            this.manager.release(this.selector);
            this.selector = null;
        }
        this.manager = null;
}

Disposable Interface

 public final boolean invoke(Environment env,
    InvokeContext context) throws Exception 
{
      
      	// Perform any common invoke functionality 
      	super.invoke(env, context);
        Map objectModel = env.getObjectModel();
        Parameters resolvedParams = VariableResolver.buildParameters(
            this.parameters, context, objectModel
        );
        Map result = null;
        if (this.threadSafeMatcher != null) {
            // Avoid select() and try/catch block (faster !)
            result = this.threadSafeMatcher.preparedMatch(preparedPattern, objectModel, resolvedParams);
        } else {
            // Get matcher from selector
            PreparableMatcher matcher = (PreparableMatcher)this.selector.select(this.componentName);
            try {
                result = matcher.preparedMatch(preparedPattern, objectModel, resolvedParams);
            } finally {
                this.selector.release(matcher);
            }
        }
        if (result != null) {
            if (getLogger().isDebugEnabled()) {
                getLogger().debug("Matcher '" + this.componentName + "' matched prepared pattern '" +
                    this.pattern + "' at " + this.getLocation());
            }
            // Invoke children with the matcher results
            return this.invokeNodes(children, env, context, name, result);
        } else {
            // Matcher failed
            return false;
        }
}

 public  void setParameters(Map parameterMap) 
{
        this.parameters = parameterMap;
}