Subversion Repositories WebE

package ch.ffhs.webE.action;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.StrutsStatics;

import ch.ffhs.webE.dao.TermDAOImpl;

import ch.ffhs.webE.dao.UserDAOImpl;

import ch.ffhs.webE.domain.ObjectEntity;

import ch.ffhs.webE.domain.ObjectType;

import ch.ffhs.webE.domain.Term;

import ch.ffhs.webE.domain.User;

import com.opensymphony.xwork2.Action;

import com.opensymphony.xwork2.ActionContext;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

/**

 * Implements actions applicable to term editing

 *

 * @author Thomas Lahn

 */

public class TermAction extends ActionSupport implements ModelDriven<Term>

{

  private static final long serialVersionUID = 1L;

  private Term term = new Term();

  private List<Term> termList = new ArrayList<Term>();

  private final TermDAOImpl termDAO = new TermDAOImpl();

  private final UserDAOImpl userDAO = new UserDAOImpl();

  /**

   * Session object

   */

  Map<String, Object> session = ActionContext.getContext().getSession();

  /**

   * @var <code>true</code> if the term is edited/renamed, <code>false</code>

   *      otherwise

   */

  public boolean edit = false;

  /**

   * @var <code>true</code> if a term was added, <code>false</code> otherwise

   */

  public boolean added = false;

  private final HttpServletRequest request = (HttpServletRequest) ActionContext

      .getContext().get(StrutsStatics.HTTP_REQUEST);

  /**

   * The term that was just saved (added, renamed)

   */

  public Term savedTerm;

  /*

   * (non-Javadoc)

   *

   * @see com.opensymphony.xwork2.ModelDriven#getModel()

   */

  public Term getModel()

  {

    return this.term;

  }

  /**

   * DB query for term list

   *

   * @return SUCCESS

   */

  public String list()

  {

    this.termList = this.termDAO.getTerms();

    return Action.SUCCESS;

  }

  /**

   * Executes the DB query to save the user

   *

   * @return {@link Action#SUCCESS}

   */

  public String save()

  {

    User user = this.userDAO.searchUsername((String) this.session

        .get("username"));

    if ("false".equals(this.request.getParameter("edit")))

    {

      /* Add a new term */

      ObjectEntity obj = new ObjectEntity(user,

          new ObjectType(ObjectType.TERM), user, null, new Date(), false,

          this.term, null, null);

      this.term.setObject(obj);

      this.added = true;

    }

    this.edit = false;

    String result = Action.SUCCESS;

    if (!this.termDAO.saveOrUpdate(this.term))

    {

      result = Action.ERROR;

    }

    this.savedTerm = this.term;

    this.term = null;

    this.list();

    return result;

  }

  /**

   * @return {@link Action#SUCCESS} if <var>id</var> > 0, {@link Action#ERROR}

   *         otherwise

   */

  public String edit()

  {

    int id = this.getIdParameter();

    String result = Action.ERROR;

    if (id > 0)

    {

      this.term = this.termDAO.getTermById(id);

      if (this.term != null)

      {

        this.edit = true;

        result = Action.SUCCESS;

      }

    }

    this.list();

    return result;

  }

  /**

   * deletes a term, gets the ID from the "id" parameter that was submitted with

   * the HTTP request

   *

   * @return String - either SUCCESS or ERROR constant

   */

  public String delete()

  {

    int id = this.getIdParameter();

    /* Check for malicious ID values */

    String result = Action.SUCCESS;

    if (id > 0)

    {

      this.termDAO.deleteTerm(id);

    }

    else

    {

      result = Action.ERROR;

    }

    this.list();

    return result;

  }

  /**

   * Gets the ID Parameter for update / delete requests

   *

   * @return int from the ID request. If not set or wrong, it gives back -1

   */

  private int getIdParameter()

  {

    int id = -1;

    try

    {

      id = Integer.parseInt(this.request.getParameter("id")); //$NON-NLS-1$

    }

    catch (Exception e)

    {

      /* TODO: Logging - wrong parameter set */

    }

    return id;

  }

  /* Standard getters and setters */

  /**

   * @return The term edited with this instance

   */

  public Term getTerm()

  {

    return this.term;

  }

  /**

   * @param term

   *          The term edited with this instance

   */

  public void setTerm(Term term)

  {

    this.term = term;

  }

  /**

   * @return The list of terms edited with this instance

   */

  public List<Term> getTermList()

  {

    return this.termList;

  }

  /**

   * @param termList

   *          The list of terms edited with this instance

   */

  public void setTermList(List<Term> termList)

  {

    this.termList = termList;

  }

}