001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.portlet;
016    
017    import com.liferay.portal.kernel.util.CharPool;
018    import com.liferay.portal.kernel.util.StringBundler;
019    import com.liferay.portal.kernel.util.StringUtil;
020    
021    /**
022     * @author Shuyang Zhou
023     */
024    public class PortletParameterUtil {
025    
026            public static String addNamespace(String portletId, String queryString) {
027                    String[] parameters = StringUtil.split(queryString, CharPool.AMPERSAND);
028    
029                    StringBundler sb = new StringBundler(2 + parameters.length * 4);
030    
031                    sb.append("p_p_id=");
032                    sb.append(portletId);
033    
034                    for (String parameter : parameters) {
035                            sb.append("&_");
036                            sb.append(portletId);
037                            sb.append("_");
038                            sb.append(parameter);
039                    }
040    
041                    return sb.toString();
042            }
043    
044    }