eu.planets_project.tb.impl.persistency.CommentPersistencyImpl.java Source code

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Here is the source code for eu.planets_project.tb.impl.persistency.CommentPersistencyImpl.java

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/*******************************************************************************
 * Copyright (c) 2007, 2010 The Planets Project Partners.
 *
 * All rights reserved. This program and the accompanying 
 * materials are made available under the terms of the 
 * Apache License, Version 2.0 which accompanies 
 * this distribution, and is available at 
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 *******************************************************************************/
package eu.planets_project.tb.impl.persistency;

import java.util.List;

import javax.ejb.Stateless;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceContextType;
import javax.persistence.Query;
import javax.rmi.PortableRemoteObject;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import eu.planets_project.tb.api.model.Comment;
import eu.planets_project.tb.impl.model.CommentImpl;
import eu.planets_project.tb.api.persistency.CommentPersistencyRemote;

@Stateless
public class CommentPersistencyImpl implements CommentPersistencyRemote {

    @PersistenceContext(unitName = "testbed", type = PersistenceContextType.TRANSACTION)
    private EntityManager manager;

    // A Log for this:
    @SuppressWarnings("unused")
    private Log log = LogFactory.getLog(CommentPersistencyImpl.class);

    /**
     * A Factory method to build a reference to this interface.
     * @return
     */
    public static CommentPersistencyRemote getInstance() {
        Log log = LogFactory.getLog(CommentPersistencyImpl.class);
        try {
            Context jndiContext = new javax.naming.InitialContext();
            CommentPersistencyRemote dao_r = (CommentPersistencyRemote) PortableRemoteObject.narrow(
                    jndiContext.lookup("testbed/CommentPersistencyImpl/remote"), CommentPersistencyRemote.class);
            return dao_r;
        } catch (NamingException e) {
            log.error("Failure in getting PortableRemoteObject: " + e.toString());
            return null;
        }
    }

    public void deleteComment(long id) {
        CommentImpl t_helper = manager.find(CommentImpl.class, id);
        manager.remove(t_helper);
    }

    public void deleteComment(Comment comment) {
        CommentImpl t_helper = manager.find(CommentImpl.class, comment.getCommentID());
        manager.remove(t_helper);
    }

    public Comment findComment(long id) {
        return manager.find(CommentImpl.class, id);
    }

    public long persistComment(Comment comment) {
        manager.persist(comment);
        return comment.getCommentID();
    }

    public void updateComment(Comment comment) {
        manager.merge(comment);
    }

    public List<Comment> getAllComments() {
        Query query = manager.createQuery("from CommentImpl");
        return (List<Comment>) query.getResultList();
    }

    public List<Comment> getAllComments(long experimentID) {
        Query query = manager.createQuery("from CommentImpl where experimentID=:expid");
        query.setParameter("expid", experimentID);
        return (List<Comment>) query.getResultList();
    }

    public List<Comment> getComments(long experimentID, String experimentPhaseID) {
        Query query = manager.createQuery("from CommentImpl where experimentID=:expid and parentID=:parentid");
        query.setParameter("expid", experimentID);
        query.setParameter("parentid", -1l);
        return (List<Comment>) query.getResultList();
    }

    public List<Comment> getCommentsByParent(long commentID) {
        // TODO Move Entity declaration us so that we access Comments not CommenImpls?
        Query query = manager.createQuery("from CommentImpl where parentID=:parentid");
        query.setParameter("parentid", commentID);
        return (List<Comment>) query.getResultList();
    }
}