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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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 org.apache.atlas.utils;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
  import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Properties;
  
  /**
   * Util class for Properties.
   */
  public final class PropertiesUtil extends PropertyPlaceholderConfigurer {
      private static final Logger logger = LoggerFactory.getLogger(PropertiesUtil.class);
  
      private static final Map<String, String> propertiesMap = new HashMap<>();
  
      private final List<String> xmlPropertyConfigurer = new ArrayList<>();
  
      private PropertiesUtil() {
      }
  
      public static String getProperty(String key, String defaultValue) {
          if (key == null) {
              return null;
          }
  
          String rtrnVal = propertiesMap.get(key);
  
          if (rtrnVal == null) {
              rtrnVal = defaultValue;
          }
  
          return rtrnVal;
      }
  
      public static String getProperty(String key) {
          if (key == null) {
              return null;
          }
  
          return propertiesMap.get(key);
      }
  
      public static String[] getPropertyStringList(String key) {
          if (key == null) {
              return null;
          }
  
          String value = propertiesMap.get(key);
  
          if (value != null) {
              String[] splitValues  = value.split(",");
              String[] returnValues = new String[splitValues.length];
  
              for (int i = 0; i < splitValues.length; i++) {
                  returnValues[i] = splitValues[i].trim();
              }
  
              return returnValues;
          } else {
              return new String[0];
          }
      }
  
      public static Integer getIntProperty(String key, int defaultValue) {
          if (key == null) {
              return null;
          }
  
          String rtrnVal = propertiesMap.get(key);
  
          if (rtrnVal == null) {
              return defaultValue;
          }
  
          return Integer.valueOf(rtrnVal);
      }
  
      public static Integer getIntProperty(String key) {
          if (key == null) {
              return null;
          }
  
          String rtrnVal = propertiesMap.get(key);
  
          if (rtrnVal == null) {
              return null;
          }
  
          return Integer.valueOf(rtrnVal);
      }
  
      public static boolean getBooleanProperty(String key, boolean defaultValue) {
          if (key == null) {
              return defaultValue;
          }
  
          String value = getProperty(key);
  
          if (value == null) {
              return defaultValue;
          }
  
          return Boolean.parseBoolean(value);
      }
  
      @Override
      protected void processProperties(ConfigurableListableBeanFactory beanFactory, Properties props) {
          Properties sysProps = System.getProperties();
  
          if (sysProps != null) {
              for (String key : sysProps.stringPropertyNames()) {
                  String value = sysProps.getProperty(key);
  
                  if (value != null) {
                      value = value.trim();
                  }
  
                  propertiesMap.put(key, value);
              }
          }
  
          if (props != null) {
              for (String key : props.stringPropertyNames()) {
                  String value = props.getProperty(key);
  
                  if (value != null) {
                      value = value.trim();
                  }
  
                  propertiesMap.put(key, value);
              }
          }
  
          super.processProperties(beanFactory, props);
      }
  }
  