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* 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.Collection;
import java.util.List;
import javax.mail.MessagingException;
import org.apache.james.protocols.api.CommandHandler;
import org.apache.james.protocols.api.Request;
import org.apache.james.protocols.api.Response;
import org.apache.james.protocols.pop3.POP3Response;
import org.apache.james.protocols.pop3.POP3Session;
import org.apache.mailet.Mail;
/**
* Handles LIST command
*/
public abstract class ListCmdHandler implements CommandHandler<POP3Session> {
/**
* Handler method called upon receipt of a LIST command.
* Returns the number of messages in the mailbox and its
* aggregate size, or optionally, the number and size of
* a single message.
*
* @param argument the first argument parsed by the parseCommand method
*/
public Response onCommand(POP3Session session, Request request) {
POP3Response response = null;
String parameters = request.getArgument();
if (session.getHandlerState() == POP3Session.TRANSACTION) {
Mail dm = (Mail) session.getState().get(POP3Session.DELETED);
if (parameters == null) {
long size = 0;
int count = 0;
try {
for (Mail mc:session.getUserMailbox()) {
if (mc != dm) {
size += mc.getMessageSize();
count++;
}
}
StringBuilder responseBuffer =
new StringBuilder(32)
.append(count)
.append(" ")
.append(size);
response = new POP3Response(POP3Response.OK_RESPONSE, responseBuffer.toString());
count = 0;
for (Mail mc:session.getUserMailbox()) {
if (mc != dm) {
responseBuffer =
new StringBuilder(16)
.append(count)
.append(" ")
.append(mc.getMessageSize());
response.appendLine(responseBuffer.toString());
}
count++;
}
response.appendLine(".");
} catch (MessagingException me) {
response = new POP3Response(POP3Response.ERR_RESPONSE);
}
} else {
int num = 0;
try {
num = Integer.parseInt(parameters);
int size =getMessageSize(session, num);
if (mc != dm) {
StringBuilder responseBuffer =
new StringBuilder(64)
.append(num)
.append(" ")
.append(mc.getMessageSize());
response = new POP3Response(POP3Response.OK_RESPONSE, responseBuffer.toString());
} else {
StringBuilder responseBuffer =
new StringBuilder(64)
.append("Message (")
.append(num)
.append(") already deleted.");
response = new POP3Response(POP3Response.ERR_RESPONSE, responseBuffer.toString());
}
} catch (IndexOutOfBoundsException npe) {
StringBuilder responseBuffer =
new StringBuilder(64)
.append("Message (")
.append(num)
.append(") does not exist.");
response = new POP3Response(POP3Response.ERR_RESPONSE, responseBuffer.toString());
} catch (NumberFormatException nfe) {
StringBuilder responseBuffer =
new StringBuilder(64)
.append(parameters)
.append(" is not a valid number");
response = new POP3Response(POP3Response.ERR_RESPONSE, responseBuffer.toString());
} catch (MessagingException me) {
response = new POP3Response(POP3Response.ERR_RESPONSE);
}
}
} else {
response = new POP3Response(POP3Response.ERR_RESPONSE);
}
return response;
}
protected abstract int getMessageSize(POP3Session session, int num);
public Collection<String> getImplCommands() {
List<String> commands = new ArrayList<String>();
commands.add("LIST");
return commands;
}
}