ChallengesVM.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2019 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.students.model;
 
import java.util.List;
import org.turro.string.Strings;
import org.turro.elephant.db.SQLHelper;
import org.turro.elephant.db.WhereClause;
import org.turro.jpa.Dao;
import org.turro.students.db.StudentsPU;
import org.turro.students.entities.Challenge;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.NotifyChange;
 
public class ChallengesVM {
 
  private String searchValue;
  
  public ChallengesVM() {
  }
 
  @NotifyChange("model")
  @Command("update")
  public void update() {}
 
  public List<Challenge> getModel() {
    WhereClause wc = new WhereClause();
    wc.addClause("select s from Challenge s");
    wc.addClause("where 1=1");
    if(!Strings.isBlank(searchValue)) {
      wc.addClause("and s.question like :searchValue");
      wc.addNamedValue("searchValue", SQLHelper.convertToPartialLike(searchValue));
    }
    wc.addClause("order by s.creation desc");
    
    return getDao().getResultList(wc);
  }
  
  public String getSearchValue() {
    return searchValue;
  }
 
  public void setSearchValue(String searchValue) {
    this.searchValue = searchValue;
  }
 
  /* Dao */
  
  private Dao _dao;
  
  private Dao getDao() {
    if(_dao == null) {
      _dao = new StudentsPU();
    }
    return _dao;
  }
 
}