1/*
2 * Copyright 2009 Mike Cumings
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *   http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.kenai.jbosh;
18
19/**
20 * Data type representing the getValue of the {@code charsets} attribute of the
21 * {@code bosh} element.
22 */
23final class AttrCharsets extends AbstractAttr<String> {
24
25    /**
26     * Array of the accepted character sets.
27     */
28    private final String[] charsets;
29
30    /**
31     * Creates a new attribute object.
32     *
33     * @param val attribute getValue
34     */
35    private AttrCharsets(final String val) {
36        super(val);
37        charsets = val.split("\\ +");
38    }
39
40    /**
41     * Creates a new attribute instance from the provided String.
42     *
43     * @param str string representation of the attribute
44     * @return attribute instance or {@code null} if provided string is
45     *  {@code null}
46     */
47    static AttrCharsets createFromString(final String str) {
48        if (str == null) {
49            return null;
50        } else {
51            return new AttrCharsets(str);
52        }
53    }
54
55    /**
56     * Determines whether or not the specified charset is supported.
57     *
58     * @param name encoding name
59     * @result {@code true} if the encoding is accepted, {@code false}
60     *  otherwise
61     */
62    boolean isAccepted(final String name) {
63        for (String str : charsets) {
64            if (str.equalsIgnoreCase(name)) {
65                return true;
66            }
67        }
68        return false;
69    }
70
71}
72