1/*
2 * Copyright (C) 2012 The Libphonenumber Authors
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.android.i18n.phonenumbers;
18
19import com.android.i18n.phonenumbers.Phonemetadata.PhoneMetadata;
20import com.android.i18n.phonenumbers.Phonemetadata.PhoneMetadataCollection;
21
22import java.io.IOException;
23import java.io.InputStream;
24import java.io.ObjectInputStream;
25import java.util.Collections;
26import java.util.HashMap;
27import java.util.Iterator;
28import java.util.Map;
29import java.util.Set;
30import java.util.logging.Level;
31import java.util.logging.Logger;
32
33/**
34 * Class encapsulating loading of PhoneNumber Metadata information. Currently this is used only for
35 * additional data files such as PhoneNumberAlternateFormats, but in the future it is envisaged it
36 * would handle the main metadata file (PhoneNumberMetaData.xml) as well.
37 *
38 * @author Lara Rennie
39 */
40class MetadataManager {
41  private static final String ALTERNATE_FORMATS_FILE_PREFIX =
42      "/com/android/i18n/phonenumbers/data/PhoneNumberAlternateFormatsProto";
43
44  private static final Logger LOGGER = Logger.getLogger(MetadataManager.class.getName());
45
46  private static final Map<Integer, PhoneMetadata> callingCodeToAlternateFormatsMap =
47      Collections.synchronizedMap(new HashMap<Integer, PhoneMetadata>());
48
49  // A set of which country calling codes there are alternate format data for. If the set has an
50  // entry for a code, then there should be data for that code linked into the resources.
51  private static final Set<Integer> countryCodeSet =
52      AlternateFormatsCountryCodeSet.getCountryCodeSet();
53
54  private MetadataManager() {
55  }
56
57  private static void close(InputStream in) {
58    if (in != null) {
59      try {
60        in.close();
61      } catch (IOException e) {
62        LOGGER.log(Level.WARNING, e.toString());
63      }
64    }
65  }
66
67  private static void loadMetadataFromFile(int countryCallingCode) {
68    InputStream source = PhoneNumberMatcher.class.getResourceAsStream(
69        ALTERNATE_FORMATS_FILE_PREFIX + "_" + countryCallingCode);
70    ObjectInputStream in = null;
71    try {
72      in = new ObjectInputStream(source);
73      PhoneMetadataCollection alternateFormats = new PhoneMetadataCollection();
74      alternateFormats.readExternal(in);
75      for (PhoneMetadata metadata : alternateFormats.getMetadataList()) {
76        callingCodeToAlternateFormatsMap.put(metadata.getCountryCode(), metadata);
77      }
78    } catch (IOException e) {
79      LOGGER.log(Level.WARNING, e.toString());
80    } finally {
81      close(in);
82    }
83  }
84
85  static PhoneMetadata getAlternateFormatsForCountry(int countryCallingCode) {
86    if (!countryCodeSet.contains(countryCallingCode)) {
87      return null;
88    }
89    synchronized (callingCodeToAlternateFormatsMap) {
90      if (!callingCodeToAlternateFormatsMap.containsKey(countryCallingCode)) {
91        loadMetadataFromFile(countryCallingCode);
92      }
93    }
94    return callingCodeToAlternateFormatsMap.get(countryCallingCode);
95  }
96}
97