* A {@link net.jxta.ext.config.Transport} is a networking binding.     *     * @return      {@link java.util.List} of {@link net.jxta.ext.config.Transport}     */        public List getTransports() {        return this.transports != null ?            (List)((ArrayList)this.transports).clone() :            Collections.EMPTY_LIST;    }        /**     * Clear and resets the {@link net.jxta.ext.config.Transport} value.     *     * @param   transport   {@link net.jxta.ext.config.Transport} value.     */        public void setTransport(Transport transport) {        List t = new ArrayList();                t.add(transport);                setTransports(t);    }        /**     * Clears and resets the {@link net.jxta.ext.config.Transport}.     *     * @param   transports      {@link net.jxta.ext.config.Transport}      */        public void setTransports(List transports) {        if (this.transports != null) {            this.transports.clear();        }                addTransports(transports);    }        /**     * Add a {@link net.jxta.ext.config.Transport}.     *     * @param   transport       {@link net.jxta.ext.config.Transport}     */        public void addTransport(Transport transport) {        addTransports(Collections.singletonList(transport));    }        /**     * Adds a {@link java.util.List} of {@link net.jxta.ext.config.Transport}.     *     * @param   transports      {@link net.jxta.ext.config.Transport}     */        public void addTransports(List transports) {        for (Iterator i =  transports.iterator();            i.hasNext(); ) {            Transport t = (Transport)i.next();                        if (t != null &&                (this.transports == null ||                ! this.transports.contains(t))) {                if (this.transports == null) {                    this.transports = new ArrayList();                }                                this.transports.add(t);            }        }    }        /**     * Remove a {@link net.jxta.ext.config.Transport}.     *     * @param   transport   {@link net.jxta.ext.config.Transport}     * @return              removed {@link net.jxta.ext.config.Transport}     */        public Transport removeTransport(Transport transport) {        Object o = null;                if (this.transports != null) {            int i = this.transports.indexOf(transport);                        if (i > -1) {                o = this.transports.remove(i);                                if (this.transports.size() == 0) {                    this.transports = null;                }            }        }                return (Transport)o;    }        /**     * Remove all {@link net.jxta.ext.config.Transport}.     */        public void clearTransports() {        if (this.transports != null) {            this.transports.clear();                        this.transports = null;        }    }        // xxx: ?is this needed?    /**     * Accessor to the security enabler.     *     * <p>The security enabler specifies whether or not security is enabled.      *     * @return      security enabler     */        public boolean isSecurity() {        return this.isSecurity;    }    /**     * Specify the security enabler value.     *     * @param   isEnabled    the security enabler value     */        public void setSecurity(boolean isEnabled) {        this.isSecurity = isEnabled;    }    /**     * Accessor to the principal attribute.     *     * <p>The principal is used to specify the associated {@link java.net.cert.Certificate}     * principal.     *     * @return      the configuration principal     */        public String getPrincipal() {        return this.principal;    }        /**     * Accessor to the password information.     *     * @return      the password     */        public String getPassword() {        return this.password;    }        /**     * Specify the configuration principal and password.     *     * @param   principal   configuration principal     * @param   password    configuration password     */       public void setSecurity(String principal, String password) {        this.principal = (principal != null &&            principal.trim().length() > 0 ? principal.trim() : null);        this.password = (password != null &&            password.trim().length() > 0 ? password.trim() : null);    }        /**     * Accessor to the Root Certificate address.     *     * <p>The Root Certificate is used to sign all subsequent certificates.     *     * @return      the Root Certificate address     */        public URI getRootCertificateAddress() {        return this.rootCertificateAddress;    }        /**     * Specify the Root Certificate address.     *     * @param   rootCertificateAddress  the Root Certificate address     */        public void setRootCertificateAddress(URI rootCertificateAddress) {        this.rootCertificateAddress = rootCertificateAddress;    }        /**     * Accessor to the Root Certificate.     *     * <p>The Root Certificate is used to sign all subsequent cerficiates.     *     * @return      the Root Certificate     */        public Certificate getRootCertificate() {        return this.pse.getCertificate();    }        /**     * Accessor to the Base64 encoded Root Certificate.     *     * @return      Base64 encoded Root Certificate     */        public String getRootCertificateBase64() {        String s = null;                try {            s = this.pse.getCert();        } catch (Exception e) {            if (LOG.isEnabledFor(Level.ERROR)) {                LOG.error("can't get root cert");            }        }                return s;    }        /**     * Specify the Root Certificate.     *     * @param   rootCertificate     the Root Certificate     */        public void setRootCertificate(Certificate rootCertificate) {        this.pse.setCertificate((X509Certificate) rootCertificate);    }        /**     * Specify the Root Certificate in Base64 encoded format.     *     * @param   rootCertificate     the Root Certificate in Base64 encoded format.     */        public void setRootCertificateBase64(String rootCertificate) {        if (rootCertificate != null) {            this.pse.setCert(rootCertificate);        }    }        /**     * Accessor to the {@link net.jxta.ext.config.ProxyAddress}.     *     * <p>A {@link net.jxta.ext.config.ProxyAddress} is used to optionally negotiate HTTP communications.     *     * @return      {@link net.jxta.ext.config.ProxyAddress} address as a {link java.net.URI}     */        public URI getPeerProxyAddress() {        return this.peerProxy;    }        /**     * Specify a {@link net.jxta.ext.config.ProxyAddress}.     *     * @param  peerProxyAddress             the {@link net.jxta.ext.config.ProxyAddress} address     * @throws     ConfiguratorException    if the address scheme is not "HTTP"     *                                      or the port is invalid     */        public void setPeerProxyAddress(URI peerProxyAddress)    throws ConfiguratorException {        if (Util.validateAddress(peerProxyAddress, true).trim().length() == 0) {            this.peerProxy = peerProxyAddress;        } else {            throw new ConfiguratorException("invalid proxy",                new IllegalArgumentException("invalid proxy uri: " +                    peerProxyAddress));        }    }        /**     * Accessor to the Endpoint outgoing queue size.     *     * <p>A queue size specifies the overall message buffer size when exceeded     * messages are dropped.     *     * @return      Endpoint queue size     */        public int getEndpointOutgoingQueueSize() {        return this.endpointQueueSize;    }        /**     * Specify the outgoing Endpoint queue size.     *     * @param   size   the outgoing Endpoint queue size     */        public void setEndpointOutgoingQueueSize(int size) {        this.endpointQueueSize = size;    }        /**     * Accessor to the {@link net.jxta.impl.proxy.ProxyService} enabler.     *     * <p>The {@link net.jxta.impl.proxy.ProxyService} enables gatewaying primarily     * for use with limited devices.     *     * @return      the {@link net.jxta.impl.proxy.ProxyService}     */        public boolean isProxy() {        return this.isProxyEnabled;    }        /**     * Specify the {@link net.jxta.impl.proxy.ProxyService} enabler.     *     * @param  isEnabled    the {@link net.jxta.impl.proxy.ProxyService} enabler     */        public void setProxy(boolean isEnabled) {        this.isProxyEnabled = isEnabled;    }        /**     * Accessor to the configuration Infrastructure {@link net.jxta.peergroup.PeerGroupID}.     *     * <p>A {@link net.jxta.peergroup.PeerGroupID} used to specify unique networks.     *     * @return      {@link net.jxta.peergroup.PeerGroupID}     */     public PeerGroupID getInfrastructurePeerGroupId() {        return this.infrastructureGroupId;    }    /**     * Specify the Infrastructure {@link net.jxta.peergroup.PeerGroupID}.     *     * @param   pgid  {@link net.jxta.peergroup.PeerGroupID}     */    public void setInfrastructurePeerGroupId(PeerGroupID pgid) {        this.infrastructureGroupId = pgid;    }    /**     * Accessor to the Infrastructure {@link net.jxta.peergroup.PeerGroup} name.     *     * <p>A Infrastructure PeerGroup name specifies a toolable meta value.     *     * @return      PeerGroup name     */    public String getInfrastructurePeerGroupName() {        return this.infrastructureGroupName;    }    /**     * Specify the Infrastructure {@link net.jxta.peergroup.PeerGroup} name.     *     * @param   name    PeerGroup name     */    public void setInfrastructurePeerGroupName(String name) {        name = name != null ? name.trim() : name;                this.infrastructureGroupName = name != null && name.length() > 0 ?            name : null;    }    /**     * Accessor to the Infrastructure {@link net.jxta.peergroup.PeerGroup} description.     *     * <p>A Infrastructure PeerGroup description specifies a toolable meta value.     *     * @return      PeerGroup description     */    public String getInfrastructurePeerGroupDescription() {        return this.infrastructureGroupDescription;    }    /**     * Specify the Infrastructure {@link net.jxta.peergroup.PeerGroup} description.     *     * @param   description    PeerGroup description     */    public void setInfrastructurePeerGroupDescription(String description) {        description = description != null ? description.trim() : description;                this.infrastructureGroupDescription = description != null &&            description.length() > 0 ? description : null;    }    /**     * Accessor to the RendezVous Bootstrap address.     *     * <p>A RendezVous Bootstrap address is used to establish initial, aka     * "seeding," RendezVous addresses, in the form of {@link java.net.URI}.     *     * @return      the RendezVous Bootstrap address in the form of a     *              {@link java.net.URI}     */        public URI getRendezVousBootstrapAddress() {        //return this.rendezVousBootstrap;        URI[] u = this.rdvConfig != null ?