1/*
2 * Copyright (C) 2011 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.prefixmapper;
18
19import java.io.IOException;
20import java.io.ObjectInput;
21import java.io.ObjectOutput;
22import java.util.SortedMap;
23
24/**
25 * Default phone prefix map storage strategy that is used for data not containing description
26 * duplications. It is mainly intended to avoid the overhead of the string table management when it
27 * is actually unnecessary (i.e no string duplication).
28 *
29 * @author Shaopeng Jia
30 */
31class DefaultMapStorage extends PhonePrefixMapStorageStrategy {
32
33  public DefaultMapStorage() {}
34
35  private int[] phoneNumberPrefixes;
36  private String[] descriptions;
37
38  @Override
39  public int getPrefix(int index) {
40    return phoneNumberPrefixes[index];
41  }
42
43  @Override
44  public String getDescription(int index) {
45    return descriptions[index];
46  }
47
48  @Override
49  public void readFromSortedMap(SortedMap<Integer, String> sortedPhonePrefixMap) {
50    numOfEntries = sortedPhonePrefixMap.size();
51    phoneNumberPrefixes = new int[numOfEntries];
52    descriptions = new String[numOfEntries];
53    int index = 0;
54    for (int prefix : sortedPhonePrefixMap.keySet()) {
55      phoneNumberPrefixes[index++] = prefix;
56      possibleLengths.add((int) Math.log10(prefix) + 1);
57    }
58    sortedPhonePrefixMap.values().toArray(descriptions);
59  }
60
61  @Override
62  public void readExternal(ObjectInput objectInput) throws IOException {
63    numOfEntries = objectInput.readInt();
64    if (phoneNumberPrefixes == null || phoneNumberPrefixes.length < numOfEntries) {
65      phoneNumberPrefixes = new int[numOfEntries];
66    }
67    if (descriptions == null || descriptions.length < numOfEntries) {
68      descriptions = new String[numOfEntries];
69    }
70    for (int i = 0; i < numOfEntries; i++) {
71      phoneNumberPrefixes[i] = objectInput.readInt();
72      descriptions[i] = objectInput.readUTF();
73    }
74    int sizeOfLengths = objectInput.readInt();
75    possibleLengths.clear();
76    for (int i = 0; i < sizeOfLengths; i++) {
77      possibleLengths.add(objectInput.readInt());
78    }
79  }
80
81  @Override
82  public void writeExternal(ObjectOutput objectOutput) throws IOException {
83    objectOutput.writeInt(numOfEntries);
84    for (int i = 0; i < numOfEntries; i++) {
85      objectOutput.writeInt(phoneNumberPrefixes[i]);
86      objectOutput.writeUTF(descriptions[i]);
87    }
88    int sizeOfLengths = possibleLengths.size();
89    objectOutput.writeInt(sizeOfLengths);
90    for (Integer length : possibleLengths) {
91      objectOutput.writeInt(length);
92    }
93  }
94}
95