[6785] | 1 | /**************************************************************** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one * |
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| 3 | * or more contributor license agreements. See the NOTICE file * |
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| 4 | * distributed with this work for additional information * |
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| 5 | * regarding copyright ownership. The ASF licenses this file * |
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| 6 | * to you under the Apache License, Version 2.0 (the * |
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| 7 | * "License"); you may not use this file except in compliance * |
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| 8 | * with the License. You may obtain a copy of the License at * |
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| 9 | * * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 * |
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| 11 | * * |
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| 12 | * Unless required by applicable law or agreed to in writing, * |
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| 13 | * software distributed under the License is distributed on an * |
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| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * |
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| 15 | * KIND, either express or implied. See the License for the * |
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| 16 | * specific language governing permissions and limitations * |
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| 17 | * under the License. * |
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| 18 | ****************************************************************/ |
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| 19 | |
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| 20 | package org.apache.james.mime4j.dom.address; |
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| 21 | |
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| 22 | import java.io.Serializable; |
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| 23 | import java.util.AbstractList; |
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| 24 | import java.util.ArrayList; |
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| 25 | import java.util.Collections; |
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| 26 | import java.util.List; |
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| 27 | |
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| 28 | /** |
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| 29 | * An immutable, random-access list of Address objects. |
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| 30 | */ |
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| 31 | public class AddressList extends AbstractList<Address> implements Serializable { |
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| 32 | |
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| 33 | private static final long serialVersionUID = 1L; |
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| 34 | |
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| 35 | private final List<? extends Address> addresses; |
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| 36 | |
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| 37 | /** |
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| 38 | * @param addresses |
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| 39 | * A List that contains only Address objects. |
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| 40 | * @param dontCopy |
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| 41 | * true iff it is not possible for the addresses list to be |
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| 42 | * modified by someone else. |
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| 43 | */ |
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| 44 | public AddressList(List<? extends Address> addresses, boolean dontCopy) { |
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| 45 | if (addresses != null) |
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| 46 | this.addresses = dontCopy ? addresses : new ArrayList<Address>( |
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| 47 | addresses); |
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| 48 | else |
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| 49 | this.addresses = Collections.emptyList(); |
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| 50 | } |
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| 51 | |
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| 52 | /** |
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| 53 | * The number of elements in this list. |
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| 54 | */ |
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| 55 | @Override |
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| 56 | public int size() { |
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| 57 | return addresses.size(); |
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| 58 | } |
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| 59 | |
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| 60 | /** |
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| 61 | * Gets an address. |
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| 62 | */ |
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| 63 | @Override |
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| 64 | public Address get(int index) { |
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| 65 | return addresses.get(index); |
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| 66 | } |
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| 67 | |
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| 68 | /** |
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| 69 | * Returns a flat list of all mailboxes represented in this address list. |
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| 70 | * Use this if you don't care about grouping. |
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| 71 | */ |
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| 72 | public MailboxList flatten() { |
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| 73 | // in the common case, all addresses are mailboxes |
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| 74 | boolean groupDetected = false; |
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| 75 | for (Address addr : addresses) { |
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| 76 | if (!(addr instanceof Mailbox)) { |
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| 77 | groupDetected = true; |
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| 78 | break; |
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| 79 | } |
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| 80 | } |
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| 81 | |
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| 82 | if (!groupDetected) { |
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| 83 | @SuppressWarnings("unchecked") |
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| 84 | final List<Mailbox> mailboxes = (List<Mailbox>) addresses; |
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| 85 | return new MailboxList(mailboxes, true); |
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| 86 | } |
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| 87 | |
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| 88 | List<Mailbox> results = new ArrayList<Mailbox>(); |
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| 89 | for (Address addr : addresses) { |
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| 90 | addr.addMailboxesTo(results); |
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| 91 | } |
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| 92 | |
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| 93 | // copy-on-construct this time, because subclasses |
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| 94 | // could have held onto a reference to the results |
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| 95 | return new MailboxList(results, false); |
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| 96 | } |
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| 97 | |
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| 98 | } |
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