gr.abiss.calipso.wicket.components.LoadableDetachableDomainObjectModels.LoadableDetachableReadOnlyItemModel.java Source code

Introduction

Here is the source code for gr.abiss.calipso.wicket.components.LoadableDetachableDomainObjectModels.LoadableDetachableReadOnlyItemModel.java

Source

/*
 * Copyright (c) 2007 - 2010 Abiss.gr <info@abiss.gr>  
 *
 *  This file is part of Calipso, a software platform by www.Abiss.gr.
 *
 *  Calipso 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.
 * 
 *  Calipso 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 General Public License 
 *  along with Calipso. If not, see http://www.gnu.org/licenses/agpl.html
 */

package gr.abiss.calipso.wicket.components.LoadableDetachableDomainObjectModels;

import gr.abiss.calipso.domain.AbstractItem;
import gr.abiss.calipso.domain.History;
import gr.abiss.calipso.domain.Item;
import gr.abiss.calipso.wicket.CalipsoApplication;

import org.apache.wicket.Application;
import org.apache.wicket.model.LoadableDetachableModel;

/**
 *
 */
public class LoadableDetachableReadOnlyItemModel extends LoadableDetachableModel {

    private static final long serialVersionUID = 1L;

    private long id;
    private Class clazz;

    /**
     * 
     * @param asset Asset domain object
     */
    public LoadableDetachableReadOnlyItemModel(AbstractItem item) {
        this(item, item.getId());
    }

    /**
     * 
     * @param asset Item domain object
     * @param id Item domain object id. (Cannot be zero)
     */
    public LoadableDetachableReadOnlyItemModel(AbstractItem item, long id) {
        // use super constructor so that the object
        // can be detached at the end of the request
        super(item);
        //      if(id == 0){
        //         throw new IllegalArgumentException();
        //      }
        this.id = id;
        this.clazz = item.getClass();
        if (!this.clazz.equals(Item.class) && !this.clazz.equals(History.class)) {
            throw new IllegalArgumentException("This model cannot handle instances of " + this.clazz);
        }
    }

    @Override
    protected Object load() {
        Object o = null;
        if (this.clazz.equals(Item.class)) {
            o = ((CalipsoApplication) Application.get()).getCalipso().loadItem(this.id);
        } else if (this.clazz.equals(History.class)) {
            o = ((CalipsoApplication) Application.get()).getCalipso().loadHistory(this.id);
        }
        return o;
    }

}