CategoryDossierItem.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2015 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.dossier.dossier;
 
import java.util.ArrayList;
import java.util.Collection;
import org.turro.dossier.db.DossierPU;
import org.turro.dossier.entity.Category;
import org.turro.dossier.entity.Dossier;
import org.turro.elephant.context.Application;
import org.turro.elephant.db.WhereClause;
import org.turro.i18n.I_;
import org.turro.jpa.Dao;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.EventListener;
import org.zkoss.zk.ui.event.Events;
import org.zkoss.zk.ui.ext.AfterCompose;
import org.zkoss.zul.Treechildren;
import org.zkoss.zul.Treeitem;
 
public class CategoryDossierItem extends Treeitem implements AfterCompose {
 
  private Treechildren children;
  private boolean loadOnDemand, knowledgeBase;
 
  public CategoryDossierItem(Object entity, boolean loadOnDemand, boolean knowledgeBase) {
    super();
    this.loadOnDemand = loadOnDemand;
    this.knowledgeBase = knowledgeBase;
    setValue(entity);
    setLabel(entity == null ? I_.get("All") : getDescription(entity));
    setTooltiptext(getLabel());
  }
 
  @Override
  public CategoryDossierTree getTree() {
    return (CategoryDossierTree) super.getTree();
  }
 
  public Object getEntity() {
    return getValue();
  }
 
  public void showContents() {
    fillCategory();
    setOpen(true);
  }
 
  public void reloadContents() {
    if(children != null) {
      children.getChildren().clear();
      showContents();
    }
  }
 
  public boolean isLeaf() {
    return getEntity() instanceof Dossier || getCategoryChildren().isEmpty();
  }
 
  private void initLoadOnDemand() {
    if(!loadOnDemand) return;
 
    setOpen(false);
 
    addEventListener(Events.ON_OPEN, new EventListener() {
      @Override
      public void onEvent(Event event) throws Exception {
        // load files and add folders
        if(isOpen()) {
          fillCategory();
        }
      }
    });
  }
 
  public CategoryDossierItem addEntity(Object entity, boolean loadOnDemand, boolean knowledgeBase) {
    CategoryDossierItem obj = new CategoryDossierItem(entity, loadOnDemand, knowledgeBase);
    children.appendChild(obj);
    obj.afterCompose();
    return obj;
  }
 
  private void fillCategory() {
    if(children != null && children.getChildren().isEmpty() 
            && (getEntity() == null || getEntity() instanceof Category)) {
      for(Object obj : getCategoryChildren()) {
        addEntity(obj, loadOnDemand, knowledgeBase);
      }
    }
  }
 
  private void addChildrenSpace() {
    if(!isLeaf()) {
      children = new Treechildren();
      appendChild(children);
      if(!loadOnDemand) {
        fillCategory();
        setOpen(true);
      }
    }
  }
 
  public boolean isLoadOnDemand() {
    return loadOnDemand;
  }
 
  public void setLoadOnDemand(boolean loadOnDemand) {
    this.loadOnDemand = loadOnDemand;
  }
 
  public Collection<Object> getCategoryChildren() {
    boolean all = Application.getApplication().isInRole("dossier:all");
    ArrayList list = new ArrayList();
    Dao dao = new DossierPU();
    WhereClause wc = new WhereClause();
    wc.addClause("select category from Category as category");
    if(getEntity() == null) {
      wc.addClause("where parent is null");
    } else {
      wc.addClause("where parent = :category");
      wc.addNamedValue("category", getEntity());
    }
    wc.addClause("order by category.description");
    for(Object o : dao.getResultList(wc)) {
      if((knowledgeBase && ((Category) (o)).isKnowledgeBase()) || 
              (all || new CategoryWrapper((Category) (o)).isChildrenParticipant())) {
        list.add((Category) o);
      }
    }
    if(getEntity() != null) {
      wc = new WhereClause();
      wc.addClause("select dossier from Dossier as dossier");
      wc.addClause("where category = :category");
      wc.addNamedValue("category", getEntity());
      wc.addClause("order by dossier.description");
      for(Object o : dao.getResultList(wc)) {
        if(all || new DossierWrapper((Dossier) (o)).isParticipant()) {
          list.add((Dossier) o);
        }
      }
    }
    return list;
  }
 
  @Override
  public void afterCompose() {
    initLoadOnDemand();
    addChildrenSpace();
  }
 
  private String getDescription(Object entity) {
    if(entity instanceof Category) {
      return ((Category) entity).getDescription();
    } else if(entity instanceof Dossier) {
      return ((Dossier) entity).getDescription();
    } else {
      return null;
    }
  }
 
}