/*
* 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.buildtools;
import com.google.i18n.phonenumbers.prefixmapper.PrefixTimeZonesMap;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.nio.charset.Charset;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A utility that generates the binary serialization of the prefix/time zones mappings from
* a human-readable text file.
*
* @author Walter Erquinigo
*/
public class GenerateTimeZonesMapData {
private final File inputTextFile;
private static final String MAPPING_DATA_FILE_NAME = "map_data";
// The IO Handler used to output the generated binary file.
private final AbstractPhonePrefixDataIOHandler ioHandler;
private static final Logger LOGGER = Logger.getLogger(GenerateTimeZonesMapData.class.getName());
public GenerateTimeZonesMapData(File inputTextFile, AbstractPhonePrefixDataIOHandler ioHandler)
throws IOException {
this.inputTextFile = inputTextFile;
if (!inputTextFile.isFile()) {
throw new IOException("The provided input text file does not exist.");
}
this.ioHandler = ioHandler;
}
/**
* Reads phone prefix data from the provided input stream and returns a SortedMap with the
* prefix to time zones mappings.
*/
// @VisibleForTesting
static SortedMap<Integer, String> parseTextFile(InputStream input)
throws IOException, RuntimeException {
final SortedMap<Integer, String> timeZoneMap = new TreeMap<Integer, String>();
BufferedReader bufferedReader =
new BufferedReader(new InputStreamReader(
new BufferedInputStream(input), Charset.forName("UTF-8")));
int lineNumber = 1;
for (String line; (line = bufferedReader.readLine()) != null; lineNumber++) {
line = line.trim();
if (line.length() == 0 || line.startsWith("#")) {
continue;
}
int indexOfPipe = line.indexOf('|');
if (indexOfPipe == -1) {
throw new RuntimeException(String.format("line %d: malformatted data, expected '|'",
lineNumber));
}
Integer prefix = Integer.parseInt(line.substring(0, indexOfPipe));
String timezones = line.substring(indexOfPipe + 1);
if (timezones.isEmpty()) {
throw new RuntimeException(String.format("line %d: missing time zones", lineNumber));
}
if (timeZoneMap.put(prefix, timezones) != null) {
throw new RuntimeException(String.format("duplicated prefix %d", prefix));
}
}
return timeZoneMap;
}
/**
* Writes the provided phone prefix/time zones map to the provided output stream.
*
* @throws IOException
*/
// @VisibleForTesting
static void writeToBinaryFile(SortedMap<Integer, String> sortedMap, OutputStream output)
throws IOException {
// Build the corresponding PrefixTimeZonesMap and serialize it to the binary format.
PrefixTimeZonesMap prefixTimeZonesMap = new PrefixTimeZonesMap();
prefixTimeZonesMap.readPrefixTimeZonesMap(sortedMap);
ObjectOutputStream objectOutputStream = new ObjectOutputStream(output);
prefixTimeZonesMap.writeExternal(objectOutputStream);
objectOutputStream.flush();
}
/**
* Runs the prefix to time zones map data generator.
*
* @throws IOException
*/
public void run() throws IOException {
FileInputStream fileInputStream = null;
FileOutputStream fileOutputStream = null;
try {
fileInputStream = new FileInputStream(inputTextFile);
SortedMap<Integer, String> mappings = parseTextFile(fileInputStream);
File outputBinaryFile = ioHandler.createFile(MAPPING_DATA_FILE_NAME);
try {
fileOutputStream = new FileOutputStream(outputBinaryFile);
writeToBinaryFile(mappings, fileOutputStream);
ioHandler.addFileToOutput(outputBinaryFile);
} finally {
ioHandler.closeFile(fileOutputStream);
}
} catch (RuntimeException e) {
LOGGER.log(Level.SEVERE,
"Error processing file " + inputTextFile.getAbsolutePath());
throw e;
} catch (IOException e) {
LOGGER.log(Level.SEVERE, e.getMessage());
} finally {
ioHandler.closeFile(fileInputStream);
ioHandler.closeFile(fileOutputStream);
ioHandler.close();
}
LOGGER.log(Level.INFO, "Time zone data successfully generated.");
}
}