content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.alibaba.jstorm.utils;
  
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.InputStream;
  import java.io.PrintWriter;
  import java.io.StringWriter;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Properties;
  
  import org.apache.commons.lang.StringUtils;
  import org.yaml.snakeyaml.Yaml;
  
  import backtype.storm.Config;
  
  
  
  public class Utils {
      public static Map LoadProperty(String prop) {
          Properties properties = new Properties();
          Map conf = new HashMap();
          try {
              InputStream stream = new FileInputStream(prop);
              properties.load(stream);
              conf.putAll(properties);
              return conf;
          } catch (FileNotFoundException e) {
              System.out.println("No such file " + prop);
              return conf;
          } catch (Exception e1) {
              e1.printStackTrace();
              
              return conf;
          }
          
          
      }
      
      public static Map LoadYaml(String confPath) {
          Map conf = new HashMap();
          
          Yaml yaml = new Yaml();
          
          try {
              InputStream stream = new FileInputStream(confPath);
              
              conf = (Map) yaml.load(stream);
              if (conf == null || conf.isEmpty() == true) {
                  throw new RuntimeException("Failed to read config file");
              }
              
          } catch (FileNotFoundException e) {
              System.out.println("No such file " + confPath);
              throw new RuntimeException("No config file");
          } catch (Exception e1) {
              e1.printStackTrace();
              throw new RuntimeException("Failed to read config file");
          }
          
          return conf;
      }
      
      public static Map LoadConf(String arg) {
          if (arg.endsWith("yaml")) {
              return LoadYaml(arg);
          } else {
              return LoadProperty(arg);
          }
      }
      
      public static Config getConfig(String[] args) {
          Config ret = new Config();
          if (args == null || args.length == 0) {
              return ret;
          }
          
          if (StringUtils.isBlank(args[0])) {
              return ret;
          }
          
          Map conf = LoadConf(args[0]);
          ret.putAll(conf);
          return ret;
      }
      
      
      public static String getErrorInfo(Throwable error) {
          try {
              StringWriter sw = new StringWriter();
              PrintWriter pw = new PrintWriter(sw);
              error.printStackTrace(pw);
              return sw.toString();
          } catch (Exception e1) {
              return "";
          }
      }
      
      public static Integer getInt(Object o) {
          Integer result = getInt(o, null);
          if (null == result) {
              throw new IllegalArgumentException("Don't know how to convert null to int");
          }
          return result;
      }
      
      public static Integer getInt(Object o, Integer defaultValue) {
          if (null == o) {
              return defaultValue;
          }
  
          if (o instanceof Integer ||
                  o instanceof Short ||
                  o instanceof Byte) {
              return ((Number) o).intValue();
          } else if (o instanceof Long) {
              final long l = (Long) o;
              if (Integer.MIN_VALUE <= l && l <= Integer.MAX_VALUE) {
                  return (int) l;
              }
          } else if (o instanceof Double) {
              final double d = (Double) o;
              if (Integer.MIN_VALUE <= d && d <= Integer.MAX_VALUE) {
                  return (int) d;
              }
          } else if (o instanceof String) {
              return Integer.parseInt((String) o);
          }
  
          //
          return defaultValue;
      }
      
      public static boolean getBoolean(Object o, boolean defaultValue) {
          if (null == o) {
              return defaultValue;
          }
          if (o instanceof Boolean) {
              return (Boolean) o;
          } else {
              throw new IllegalArgumentException("Don't know how to convert " + o + " + to boolean");
          }
      }
  }
  