ElephantProperties.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2018 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.elephant.context;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.List;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import org.amic.util.file.FileUtil;
 
public class ElephantProperties {
 
  private static Properties _elephantContext;
  private static final String ELEPHANT_CONTEXT_FOLDER = "/WEB-INF/elephant/conf";
  
  public static void resetProperties() {
    _elephantContext = null;
  }
  
  public static boolean containsContextProperty(String context, String property) {
    checkProperties();
    return _elephantContext != null ? _elephantContext.containsKey(context + "_" + property) : false;
  }
  
  public static String getContextProperty(String context, String property) {
    return getContextProperty(context, property, (String) null);
  }
 
  public static String getContextProperty(String context, String property, String defaultValue) {
    checkProperties();
    return _elephantContext != null ? _elephantContext.getProperty(context + "_" + property, defaultValue) : null;
  }
 
  public static Boolean getContextProperty(String context, String property, Boolean defaultValue) {
    return Boolean.valueOf(getContextProperty(context, property, defaultValue.toString()));
  }
 
  public static List<String> getContextPrefixedProperties(String context, String prefix) {
    checkProperties();
    return _elephantContext.keySet().stream()
            .filter(k -> ((String) k).startsWith(context + "_" + prefix))
            .map(k -> (String) _elephantContext.get(k))
            .collect(Collectors.toList());
  }
 
  private static void checkProperties() {
    if(_elephantContext == null) {
      _elephantContext = new Properties();
      File propFiles[] = new File(ElephantContext.getRealPath(ELEPHANT_CONTEXT_FOLDER)).listFiles(new FilenameFilter() {
        @Override
        public boolean accept(File dir, String name) {
          return name.endsWith(".properties") && !name.startsWith("formula-context");
        }
      });
      for(File propFile : propFiles) {
        String prefix = FileUtil.getBaseName(propFile);
        try(FileInputStream fis = new FileInputStream(propFile)) {
          Properties properties = new Properties();
          properties.load(fis);
          for(String key : properties.stringPropertyNames()) {
            _elephantContext.put(prefix + "_" + key, properties.get(key));
          }
        } catch (IOException ex) {
          Logger.getLogger(ElephantContext.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
        }
      }
    }
  }
  
}