Java tutorial
/** * Copyright (c) 2009--2010 Red Hat, Inc. * * This software is licensed to you under the GNU General Public License, * version 2 (GPLv2). There is NO WARRANTY for this software, express or * implied, including the implied warranties of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. You should have received a copy of GPLv2 * along with this software; if not, see * http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. * * Red Hat trademarks are not licensed under GPLv2. No permission is * granted to use or replicate Red Hat trademarks that are incorporated * in this software or its documentation. */ package com.redhat.rhn.common.security.acl; import com.redhat.rhn.common.conf.ConfigDefaults; import org.apache.commons.lang.StringUtils; /** * BaseHandler is the base class for all Acl handlers and should * be where we put common reusable methods. * @version $Rev$ */ public abstract class BaseHandler implements AclHandler { /** * */ public BaseHandler() { super(); } /** * returns true if satellite, false if spacewalk * @param ctx Our current context, containing a crid or cfid. * @param params nothing * @return true if satellite, false if spacewalk */ public boolean aclIsSatellite(Object ctx, String[] params) { return !ConfigDefaults.get().isSpacewalk(); } /** * Returns a Long object from the given object. We expect * a String[] or String as the input all others return null; * @param o object to be converted * @return Long if object is parsable, or null. */ public Long getAsLong(Object o) { Long ret = null; if (o != null) { if (o instanceof String[]) { String[] s = (String[]) o; if (s.length > 0 && !StringUtils.isEmpty(s[0])) { ret = new Long(s[0]); } } else if (o instanceof String) { String s = (String) o; if (!StringUtils.isEmpty(s)) { ret = new Long(s); } } else if (o instanceof Long) { ret = (Long) o; } } return ret; } }