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/*
* Copyright (C) 2012 The Libphonenumber Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.i18n.phonenumbers;
import com.google.i18n.phonenumbers.Phonemetadata.PhoneMetadata;
import com.google.i18n.phonenumbers.Phonemetadata.PhoneMetadataCollection;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Class encapsulating loading of PhoneNumber Metadata information. Currently this is used only for
* additional data files such as PhoneNumberAlternateFormats, but in the future it is envisaged it
* would handle the main metadata file (PhoneNumberMetadata.xml) as well.
*/
final class MetadataManager {
private static final String ALTERNATE_FORMATS_FILE_PREFIX =
"/com/google/i18n/phonenumbers/data/PhoneNumberAlternateFormatsProto";
private static final String SHORT_NUMBER_METADATA_FILE_PREFIX =
"/com/google/i18n/phonenumbers/data/ShortNumberMetadataProto";
private static final Logger logger = Logger.getLogger(MetadataManager.class.getName());
private static final Map<Integer, PhoneMetadata> callingCodeToAlternateFormatsMap =
Collections.synchronizedMap(new HashMap<Integer, PhoneMetadata>());
private static final Map<String, PhoneMetadata> regionCodeToShortNumberMetadataMap =
Collections.synchronizedMap(new HashMap<String, PhoneMetadata>());
// A set of which country calling codes there are alternate format data for. If the set has an
// entry for a code, then there should be data for that code linked into the resources.
private static final Set<Integer> countryCodeSet =
AlternateFormatsCountryCodeSet.getCountryCodeSet();
// A set of which region codes there are short number data for. If the set has an entry for a
// code, then there should be data for that code linked into the resources.
private static final Set<String> regionCodeSet = ShortNumbersRegionCodeSet.getRegionCodeSet();
private MetadataManager() {
}
/**
* Loads and returns the metadata object from the given stream and closes the stream.
*
* @param source the non-null stream from which metadata is to be read
* @return the loaded metadata object
*/
static PhoneMetadataCollection loadMetadataAndCloseInput(InputStream source) {
ObjectInputStream ois = null;
try {
try {
ois = new ObjectInputStream(source);
} catch (IOException e) {
throw new RuntimeException("cannot load/parse metadata", e);
}
PhoneMetadataCollection metadataCollection = new PhoneMetadataCollection();
try {
metadataCollection.readExternal(ois);
} catch (IOException e) {
throw new RuntimeException("cannot load/parse metadata", e);
}
return metadataCollection;
} finally {
try {
if (ois != null) {
// This will close all underlying streams as well, including source.
ois.close();
} else {
source.close();
}
} catch (IOException e) {
logger.log(Level.WARNING, "error closing input stream (ignored)", e);
}
}
}
private static void loadAlternateFormatsMetadataFromFile(int countryCallingCode) {
String fileName = ALTERNATE_FORMATS_FILE_PREFIX + "_" + countryCallingCode;
InputStream source = MetadataManager.class.getResourceAsStream(fileName);
if (source == null) {
// Sanity check; this should not happen since we only load things based on the expectation
// that they are present, by checking the map of available data first.
throw new IllegalStateException("missing metadata: " + fileName);
}
PhoneMetadataCollection alternateFormats = loadMetadataAndCloseInput(source);
for (PhoneMetadata metadata : alternateFormats.getMetadataList()) {
callingCodeToAlternateFormatsMap.put(metadata.getCountryCode(), metadata);
}
}
static PhoneMetadata getAlternateFormatsForCountry(int countryCallingCode) {
if (!countryCodeSet.contains(countryCallingCode)) {
return null;
}
synchronized (callingCodeToAlternateFormatsMap) {
if (!callingCodeToAlternateFormatsMap.containsKey(countryCallingCode)) {
loadAlternateFormatsMetadataFromFile(countryCallingCode);
}
}
return callingCodeToAlternateFormatsMap.get(countryCallingCode);
}
private static void loadShortNumberMetadataFromFile(String regionCode) {
String fileName = SHORT_NUMBER_METADATA_FILE_PREFIX + "_" + regionCode;
InputStream source = MetadataManager.class.getResourceAsStream(fileName);
if (source == null) {
// Sanity check; this should not happen since we only load things based on the expectation
// that they are present, by checking the map of available data first.
throw new IllegalStateException("missing metadata: " + fileName);
}
PhoneMetadataCollection shortNumberMetadata = loadMetadataAndCloseInput(source);
for (PhoneMetadata metadata : shortNumberMetadata.getMetadataList()) {
regionCodeToShortNumberMetadataMap.put(regionCode, metadata);
}
}
// @VisibleForTesting
static Set<String> getShortNumberMetadataSupportedRegions() {
return regionCodeSet;
}
static PhoneMetadata getShortNumberMetadataForRegion(String regionCode) {
if (!regionCodeSet.contains(regionCode)) {
return null;
}
synchronized (regionCodeToShortNumberMetadataMap) {
if (!regionCodeToShortNumberMetadataMap.containsKey(regionCode)) {
loadShortNumberMetadataFromFile(regionCode);
}
}
return regionCodeToShortNumberMetadataMap.get(regionCode);
}
}
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