DocumentDefinitions.java

Go to the documentation of this file.

/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2022 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.documentation;
 
import java.io.File;
import java.io.IOException;
import java.io.Writer;
import java.util.Collection;
import java.util.SortedSet;
import java.util.TreeSet;
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.lock.Initializer;
import org.turro.reflection.JSONSerializer;
 
public class DocumentDefinitions extends TreeSet<DocumentDefinition> {
 
  public DocumentDefinition get(String name) {
    return stream().filter(dd -> dd.getName().equals(name)).findFirst().orElse(null);
  }
  
  public SortedSet<String> names() {
    return new TreeSet(stream().map(dd -> dd.getName()).toList());
  }
  
  public DocumentDefinitions filtered(String root) {
    return new DocumentDefinitions(stream().filter(dd -> dd.matches(root)).toList());
  }
  
  public void save() {
    save(this);
  }
  
  /* Factory */
  
  private static final Initializer<DocumentDefinitions> INIT = new Initializer<>();
  private static final FileWatch watch = new FileWatch(definitionsFile());
  
  public static DocumentDefinitions instance() {
    return INIT.instance(() -> !watch.isNewer(), () -> load());
  }
  
  public static void reset() {
    INIT.reset();
  }
  
  private static final String DOCUMENTATION_FILE = "/WEB-INF/elephant/conf/documentation.json";
 
  protected static DocumentDefinitions load() {
    DocumentDefinitions definitions = null;
    if(watch.exists()) try {
      watch.reset();
      JSONSerializer ser = new JSONSerializer(true);
      definitions = ser.fromJson(FileUtil.getContent(watch.getFile()), DocumentDefinitions.class);
    } catch (IOException ex) {
      Logger.getLogger(DocumentDefinitions.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
    }
    if(definitions == null) {
      definitions = new DocumentDefinitions();
      save(definitions);
    }
    return definitions;
  }
  
  private static void save(DocumentDefinitions definitions) {
    try (Writer writer = FileUtil.getFileWriter(watch.getFileSafe())) {
      JSONSerializer ser = new JSONSerializer(definitions, true);
      writer.write(ser.toJson());
    } catch (IOException ex) {
      Logger.getLogger(DocumentDefinitions.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
    }
  }
  
  private static File definitionsFile() {
    return new File(ElephantContext.getRealPath(DOCUMENTATION_FILE));
  }
 
  public DocumentDefinitions() {
  }
 
  private DocumentDefinitions(Collection<DocumentDefinition> definitions) {
    super(definitions);
  }
 
}