/****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one *
* or more contributor license agreements. See the NOTICE file *
* distributed with this work for additional information *
* regarding copyright ownership. The ASF licenses this file *
* to you under the Apache License, Version 2.0 (the *
* "License"); you may not use this file except in compliance *
* with the License. You may obtain a copy of the License at *
* *
* http://www.apache.org/licenses/LICENSE-2.0 *
* *
* Unless required by applicable law or agreed to in writing, *
* software distributed under the License is distributed on an *
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
* KIND, either express or implied. See the License for the *
* specific language governing permissions and limitations *
* under the License. *
****************************************************************/
package org.apache.james.protocols.pop3.core;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.apache.james.protocols.api.Request;
import org.apache.james.protocols.api.Response;
import org.apache.james.protocols.api.ProtocolSession.State;
import org.apache.james.protocols.api.handler.CommandHandler;
import org.apache.james.protocols.pop3.POP3Response;
import org.apache.james.protocols.pop3.POP3Session;
import org.apache.james.protocols.pop3.mailbox.MessageMetaData;
/**
* Handles STAT command
*/
public class StatCmdHandler implements CommandHandler<POP3Session> {
private static final Collection<String> COMMANDS = Collections.unmodifiableCollection(Arrays.asList("STAT"));
/**
* Handler method called upon receipt of a STAT command. Returns the number
* of messages in the mailbox and its aggregate size.
*/
@SuppressWarnings("unchecked")
public Response onCommand(POP3Session session, Request request) {
if (session.getHandlerState() == POP3Session.TRANSACTION) {
List<MessageMetaData> uidList = (List<MessageMetaData>) session.getAttachment(POP3Session.UID_LIST, State.Transaction);
List<Long> deletedUidList = (List<Long>) session.getAttachment(POP3Session.DELETED_UID_LIST, State.Transaction);
long size = 0;
int count = 0;
if (uidList.isEmpty() == false) {
List<MessageMetaData> validResults = new ArrayList<MessageMetaData>();
for (int i = 0; i < uidList.size(); i++) {
MessageMetaData data = uidList.get(i);
if (deletedUidList.contains(data.getUid()) == false) {
size += data.getSize();
count++;
validResults.add(data);
}
}
}
StringBuilder responseBuffer = new StringBuilder(32).append(count).append(" ").append(size);
return new POP3Response(POP3Response.OK_RESPONSE, responseBuffer.toString());
} else {
return POP3Response.ERR;
}
}
/**
* @see org.apache.james.protocols.api.handler.CommandHandler#getImplCommands()
*/
public Collection<String> getImplCommands() {
return COMMANDS;
}
}