JpaGrid.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 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.jpa.grid;
 
import org.turro.jpa.Dao;
import org.turro.zkoss.grid.EditableGrid;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.ext.AfterCompose;
import org.zkoss.zul.Row;
import org.zkoss.zul.Rows;
 
public abstract class JpaGrid<V> extends EditableGrid<V> implements AfterCompose {
 
  private Dao dao;
  private String query;
  private boolean autoSave = true;
 
  public JpaGrid(Dao dao, String query, boolean autoSave) {
    super();
    this.dao = dao;
    this.query = query;
    this.autoSave = autoSave;
  }
 
  public boolean isAutoSave() {
    return autoSave;
  }
 
  public void setAutoSave(boolean autoSave) {
    this.autoSave = autoSave;
  }
 
  public Dao getDao() {
    return dao;
  }
 
  public void setDao(Dao dao) {
    this.dao = dao;
  }
 
  public String getQuery() {
    return query;
  }
 
  public void setQuery(String query) {
    this.query = query;
  }
 
  public void save() {
    for(Component row : getRows().getChildren()) {
      if(isValid((V) ((Row)row).getValue())) {
        ((Row)row).setValue(dao.saveObject(((Row)row).getValue()));
      }
    }
  }
 
  @Override
  public void afterCompose() {
    addTableRows();
    super.afterCompose();
  }
 
  @Override
  protected void rowChanged(Row row) {
    if(autoSave && row.getValue() != null && isValid((V) row.getValue())) {
      row.setValue(dao.saveObject(row.getValue()));
      updateRow(row);
    }
  }
 
  @Override
  protected boolean deleteRow(Row row) {
    if(autoSave && row.getValue() != null) {
      dao.deleteObject(row.getValue());
      return true;
    }
    return false;
  }
 
  private void addTableRows() {
    if(getRows() == null) {
      appendChild(new Rows());
    }
    for(Object o : dao.getResultList(query)) {
      Row row = new Row();
      getRows().appendChild(row);
      initiateRow(row, (V) o);
    }
    if(isAllowInsertions()) {
      Row row = new Row();
      getRows().appendChild(row);
      row.setSclass("invalid");
      initiateRow(row, null);
    }
  }
 
}