Java tutorial
/* * Copyright (c) 2009-2011, Martijn Brinkers, Djigzo. * * This file is part of Djigzo email encryption. * * Djigzo is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License * version 3, 19 November 2007 as published by the Free Software * Foundation. * * Djigzo is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public * License along with Djigzo. If not, see <http://www.gnu.org/licenses/> * * Additional permission under GNU AGPL version 3 section 7 * * If you modify this Program, or any covered work, by linking or * combining it with aspectjrt.jar, aspectjweaver.jar, tyrex-1.0.3.jar, * freemarker.jar, dom4j.jar, mx4j-jmx.jar, mx4j-tools.jar, * spice-classman-1.0.jar, spice-loggerstore-0.5.jar, spice-salt-0.8.jar, * spice-xmlpolicy-1.0.jar, saaj-api-1.3.jar, saaj-impl-1.3.jar, * wsdl4j-1.6.1.jar (or modified versions of these libraries), * containing parts covered by the terms of Eclipse Public License, * tyrex license, freemarker license, dom4j license, mx4j license, * Spice Software License, Common Development and Distribution License * (CDDL), Common Public License (CPL) the licensors of this Program grant * you additional permission to convey the resulting work. */ package mitm.application.djigzo.james.matchers; import java.util.Collection; import java.util.Collections; import java.util.HashSet; import javax.mail.MessagingException; import javax.mail.internet.InternetAddress; import mitm.application.djigzo.User; import mitm.application.djigzo.james.MailAddressUtils; import mitm.application.djigzo.james.MessageOriginatorIdentifier; import mitm.application.djigzo.service.SystemServices; import mitm.application.djigzo.workflow.UserWorkflow; import mitm.common.hibernate.DatabaseActionExecutor; import mitm.common.hibernate.DatabaseActionExecutorBuilder; import mitm.common.hibernate.SessionManager; import mitm.common.mail.EmailAddressUtils; import mitm.common.properties.HierarchicalPropertiesException; import org.apache.commons.lang.StringUtils; import org.apache.commons.lang.text.StrBuilder; import org.apache.mailet.Mail; import org.apache.mailet.MailAddress; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Matcher that matches the recipient against a property read from the sender user properties. * * @author Martijn Brinkers * */ public class RecipientIsSenderProperty extends AbstractContextAwareDjigzoMatcher { private final static Logger logger = LoggerFactory.getLogger(RecipientIsSenderProperty.class); /* * The number of times a database action should be retried when a ConstraintViolation occurs */ private final static int ACTION_RETRIES = 3; /* * The key under which we store the activation context */ protected static final String ACTIVATION_CONTEXT_KEY = "BlackBerryRelayEmail"; /* * manages database sessions */ private SessionManager sessionManager; /* * Used for adding and retrieving users */ private UserWorkflow userWorkflow; /* * Is used to identify the 'sender' (from or enveloped sender or...) of the message */ private MessageOriginatorIdentifier messageOriginatorIdentifier; /* * Used to execute database actions in a transaction */ private DatabaseActionExecutor actionExecutor; /* * The user property of the target recipient */ private String userProperty; @Override protected Logger getLogger() { return logger; } @Override public void init() throws MessagingException { getLogger().info("Initializing matcher: " + getMatcherName()); sessionManager = SystemServices.getSessionManager(); userWorkflow = SystemServices.getUserWorkflow(); messageOriginatorIdentifier = SystemServices.getMessageOriginatorIdentifier(); actionExecutor = DatabaseActionExecutorBuilder.createDatabaseActionExecutor(sessionManager); assert (sessionManager != null); assert (userWorkflow != null); assert (messageOriginatorIdentifier != null); assert (actionExecutor != null); userProperty = getCondition(); if (StringUtils.isBlank(userProperty)) { throw new MessagingException("userProperty is missing."); } StrBuilder sb = new StrBuilder(); sb.append("userProperty: "); sb.append(userProperty); getLogger().info(sb.toString()); } protected String getBlackBerryRelayEmail(final Mail mail, final Collection<MailAddress> mailAddresses) throws MessagingException { MailAddressMatcher.HasMatchEventHandler hasMatchEventHandler = new MailAddressMatcher.HasMatchEventHandler() { @Override public boolean hasMatch(final User user) throws MessagingException { String blackBerryRelayEmail; try { blackBerryRelayEmail = user.getUserPreferences().getProperties().getProperty(userProperty, false); } catch (HierarchicalPropertiesException e) { throw new MessagingException( "Error getting blackBerryRelayEmail from property: " + userProperty, e); } getActivationContext().set(ACTIVATION_CONTEXT_KEY, blackBerryRelayEmail); return true; } }; MailAddressMatcher matcher = new MailAddressMatcher(sessionManager, userWorkflow, actionExecutor, hasMatchEventHandler, ACTION_RETRIES); matcher.getMatchingMailAddresses(mailAddresses); return getActivationContext().get(ACTIVATION_CONTEXT_KEY, String.class); } @Override public Collection<MailAddress> matchMail(Mail mail) throws MessagingException { InternetAddress originator = messageOriginatorIdentifier.getOriginator(mail); Collection<MailAddress> matching = new HashSet<MailAddress>(); if (originator != null) { MailAddress sender = new MailAddress(originator); String blackBerryRelayEmail = EmailAddressUtils .canonicalize(getBlackBerryRelayEmail(mail, Collections.singleton(sender))); if (blackBerryRelayEmail != null) { Collection<MailAddress> recipients = MailAddressUtils.getRecipients(mail); if (recipients != null) { for (MailAddress recipient : recipients) { String email = EmailAddressUtils.canonicalize(recipient.toString()); if (blackBerryRelayEmail.equals(email)) { matching.add(recipient); } } } } } return matching; } }