/**
* Copyright 2012 Twitter, Inc
*
* 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 ua_parser;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.Map;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.SafeConstructor;
/**
* Java implementation of <a href="https://github.com/tobie/ua-parser">UA Parser</a>
*
* @author Steve Jiang (@sjiang) <gh at iamsteve com>
*/
public class Parser {
private static final String REGEX_YAML_PATH = "/ua_parser/regexes.yaml";
private UserAgentParser uaParser;
private OSParser osParser;
private DeviceParser deviceParser;
public Parser() throws IOException {
this(Parser.class.getResourceAsStream(REGEX_YAML_PATH));
}
public Parser(InputStream regexYaml) {
initialize(regexYaml);
}
public Client parse(String agentString) {
UserAgent ua = parseUserAgent(agentString);
OS os = parseOS(agentString);
Device device = deviceParser.parse(agentString);
return new Client(ua, os, device);
}
public UserAgent parseUserAgent(String agentString) {
return uaParser.parse(agentString);
}
public Device parseDevice(String agentString) {
return deviceParser.parse(agentString);
}
public OS parseOS(String agentString) {
return osParser.parse(agentString);
}
private void initialize(InputStream regexYaml) {
Yaml yaml = new Yaml(new SafeConstructor());
@SuppressWarnings("unchecked")
Map<String,List<Map<String,String>>> regexConfig = (Map<String,List<Map<String,String>>>) yaml.load(regexYaml);
List<Map<String,String>> uaParserConfigs = regexConfig.get("user_agent_parsers");
if (uaParserConfigs == null) {
throw new IllegalArgumentException("user_agent_parsers is missing from yaml");
}
uaParser = UserAgentParser.fromList(uaParserConfigs);
List<Map<String,String>> osParserConfigs = regexConfig.get("os_parsers");
if (osParserConfigs == null) {
throw new IllegalArgumentException("os_parsers is missing from yaml");
}
osParser = OSParser.fromList(osParserConfigs);
List<Map<String,String>> deviceParserConfigs = regexConfig.get("device_parsers");
if (deviceParserConfigs == null) {
throw new IllegalArgumentException("device_parsers is missing from yaml");
}
deviceParser = DeviceParser.fromList(deviceParserConfigs);
}
}