source: contrib/MailArchiver/sources/vendor/mime4j/apache-mime4j-0.7-SNAPSHOT-20110327.010440-17/dom/src/main/java/org/apache/james/mime4j/dom/address/AddressList.java @ 6785

Revision 6785, 3.3 KB checked in by rafaelraymundo, 12 years ago (diff)

Ticket #2946 - Liberado codigo do MailArchiver?. Documentação na subpasta DOCS.

Line 
1/****************************************************************
2 * Licensed to the Apache Software Foundation (ASF) under one   *
3 * or more contributor license agreements.  See the NOTICE file *
4 * distributed with this work for additional information        *
5 * regarding copyright ownership.  The ASF licenses this file   *
6 * to you under the Apache License, Version 2.0 (the            *
7 * "License"); you may not use this file except in compliance   *
8 * with the License.  You may obtain a copy of the License at   *
9 *                                                              *
10 *   http://www.apache.org/licenses/LICENSE-2.0                 *
11 *                                                              *
12 * Unless required by applicable law or agreed to in writing,   *
13 * software distributed under the License is distributed on an  *
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
15 * KIND, either express or implied.  See the License for the    *
16 * specific language governing permissions and limitations      *
17 * under the License.                                           *
18 ****************************************************************/
19
20package org.apache.james.mime4j.dom.address;
21
22import java.io.Serializable;
23import java.util.AbstractList;
24import java.util.ArrayList;
25import java.util.Collections;
26import java.util.List;
27
28/**
29 * An immutable, random-access list of Address objects.
30 */
31public class AddressList extends AbstractList<Address> implements Serializable {
32
33    private static final long serialVersionUID = 1L;
34
35    private final List<? extends Address> addresses;
36
37    /**
38     * @param addresses
39     *            A List that contains only Address objects.
40     * @param dontCopy
41     *            true iff it is not possible for the addresses list to be
42     *            modified by someone else.
43     */
44    public AddressList(List<? extends Address> addresses, boolean dontCopy) {
45        if (addresses != null)
46            this.addresses = dontCopy ? addresses : new ArrayList<Address>(
47                    addresses);
48        else
49            this.addresses = Collections.emptyList();
50    }
51
52    /**
53     * The number of elements in this list.
54     */
55    @Override
56    public int size() {
57        return addresses.size();
58    }
59
60    /**
61     * Gets an address.
62     */
63    @Override
64    public Address get(int index) {
65        return addresses.get(index);
66    }
67
68    /**
69     * Returns a flat list of all mailboxes represented in this address list.
70     * Use this if you don't care about grouping.
71     */
72    public MailboxList flatten() {
73        // in the common case, all addresses are mailboxes
74        boolean groupDetected = false;
75        for (Address addr : addresses) {
76            if (!(addr instanceof Mailbox)) {
77                groupDetected = true;
78                break;
79            }
80        }
81
82        if (!groupDetected) {
83            @SuppressWarnings("unchecked")
84            final List<Mailbox> mailboxes = (List<Mailbox>) addresses;
85            return new MailboxList(mailboxes, true);
86        }
87
88        List<Mailbox> results = new ArrayList<Mailbox>();
89        for (Address addr : addresses) {
90            addr.addMailboxesTo(results);
91        }
92
93        // copy-on-construct this time, because subclasses
94        // could have held onto a reference to the results
95        return new MailboxList(results, false);
96    }
97
98}
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