001/**
002 *
003 * Copyright 2019 Florian Schmaus.
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smackx.bytestreams.socks5;
018
019import java.util.Collections;
020import java.util.Iterator;
021import java.util.Map;
022
023import org.jivesoftware.smack.SmackException;
024
025import org.jivesoftware.smackx.bytestreams.socks5.packet.Bytestream.StreamHost;
026
027public abstract class Socks5Exception extends SmackException {
028
029    /**
030     *
031     */
032    private static final long serialVersionUID = 1L;
033
034    protected Socks5Exception(String message) {
035        super(message);
036    }
037
038    public static final class NoSocks5StreamHostsProvided extends Socks5Exception {
039        /**
040         *
041         */
042        private static final long serialVersionUID = 1L;
043
044        NoSocks5StreamHostsProvided() {
045            super("No SOCKS5 stream hosts provided.");
046        }
047    }
048
049    public static final class CouldNotConnectToAnyProvidedSocks5Host extends Socks5Exception {
050
051        /**
052         *
053         */
054        private static final long serialVersionUID = 1L;
055
056        private final Map<StreamHost, Exception> streamHostsExceptions;
057
058        private CouldNotConnectToAnyProvidedSocks5Host(String message, Map<StreamHost, Exception> streamHostsExceptions) {
059            super(message);
060            this.streamHostsExceptions = Collections.unmodifiableMap(streamHostsExceptions);
061        }
062
063        public Map<StreamHost, Exception> getStreamHostsExceptions() {
064            return streamHostsExceptions;
065        }
066
067        static CouldNotConnectToAnyProvidedSocks5Host construct(Map<StreamHost, Exception> streamHostsExceptions) {
068            assert !streamHostsExceptions.isEmpty();
069
070            StringBuilder sb = new StringBuilder(256);
071            sb.append("Could not establish socket with any provided SOCKS5 stream host.");
072            Iterator<StreamHost> it = streamHostsExceptions.keySet().iterator();
073            while (it.hasNext()) {
074                StreamHost streamHost = it.next();
075                Exception exception = streamHostsExceptions.get(streamHost);
076
077                sb.append(' ').append(streamHost).append(" Exception: '").append(exception).append('\'');
078                if (it.hasNext()) {
079                    sb.append(',');
080                }
081            }
082
083            String message = sb.toString();
084            return new CouldNotConnectToAnyProvidedSocks5Host(message, streamHostsExceptions);
085        }
086    }
087}