Publishing.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2021 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.publishing;
 
import java.io.File;
import java.io.IOException;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.turro.elephant.context.ElephantContext;
import org.turro.elephant.impl.util.FileUtil;
import org.turro.file.FileWatch;
import org.turro.reflection.JSONSerializer;
 
public class Publishing<E> implements Serializable {
  
  private String entityRoot;
  private HashMap<String, PublishingContext> contexts;
 
  public String getEntityRoot() {
    return entityRoot;
  }
 
  public boolean hasContext(String context) {
    return contexts.containsKey(context);
  }
 
  public PublishingContext getContext(String context) {
    return contexts.get(context);
  }
 
  public boolean checkEntity(String context, E entity) {
    PublishingContext pc = contexts.get(context);
    return (pc != null) ? checkEntity(pc, entity) : null;
  }
  
  protected boolean checkEntity(PublishingContext pc, E entity) {
    return false;
  }
 
  /* Factory */
  
  public static <T extends Publishing> Publishing getPublishing(Class<T> javaClass, String root) {
    return doLoad(javaClass, root);
  }
  
  public static <T extends Publishing> PublishingContext getPublishingContext(Class<T> javaClass, String root, String context) {
    Publishing publishing = doLoad(javaClass, root);
    if(publishing != null) {
      return publishing.getContext(context);
    } else {
      return null;
    }
  }
  
  /* Publishing */
  
  private static final Map<String, Publishing> _pub = new HashMap<>();
  private static final Map<String, Long> _lastLoads = new HashMap<>();
  
  protected static <T extends Publishing> Publishing doLoad(Class<T> javaClass, String publishingFile) {
    if(_pub.get(publishingFile) == null || FileWatch.isNewer(convert(publishingFile), _lastLoads.get(publishingFile))
            || !FileWatch.exists(convert(publishingFile))) {
      T pub = null;
      try {
        JSONSerializer ser = new JSONSerializer(true);
        pub = ser.fromJson(FileUtil.getContent(new File(convert(publishingFile))), javaClass);
      } catch (IOException ex) {
        Logger.getLogger(Publishing.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
      }
      if(pub != null) {
        _pub.put(publishingFile, pub);
        _lastLoads.put(publishingFile, FileWatch.getTime(convert(publishingFile)));
      }
    }
    return _pub.get(publishingFile);
  }
  
  private static String convert(String publishingFile) {
    if(!publishingFile.contains("/")) {
      publishingFile = "/WEB-INF/elephant/conf/" + publishingFile + "-publishing.json";
    }
    return ElephantContext.getRealPath(publishingFile);
  }
 
}