jammer.concatFiles();
    public void execute() throws BuildException {        this.logDebug("============= Jammer task START====================");        try {            // check for valid directories            if (!this.webrootDir.isDirectory()) {                throw new BuildException(this.webrootDir                        + "is not a valid directory");            }            Jammer jammer = new Jammer(this.destFile, this, this.webrootDir.toString(),                                        this.webappName);            // This should be an array of Files            Object [] files = this.getIncludedFiles();                    for (int i = 0; i < files.length; ++i) {                File file = (File)files[i];                jammer.parse(file);                jammer.concatFiles();            }        } catch (JammerException je){            je.printStackTrace();            throw new BuildException(je);        } catch (Throwable t) {            t.printStackTrace();            throw new BuildException(t);        }        this.logDebug("================ Jammer task DONE===================");    }