/*

  * $Source$

  * $Revision$

  *

  * Copyright (C) 2007 Tim Pizey

  *

  * Part of Melati (http://melati.org), a framework for the rapid

  * development of clean, maintainable web applications.

  *

  * Melati is free software; Permission is granted to copy, distribute

  * and/or modify this software under the terms either:

  *

  * a) the GNU General Public License as published by the Free Software

  *    Foundation; either version 2 of the License, or (at your option)

  *    any later version,

  *

  *    or

  *

  * b) any version of the Melati Software License, as published

  *    at http://melati.org

  *

  * You should have received a copy of the GNU General Public License and

  * the Melati Software License along with this program;

  * if not, write to the Free Software Foundation, Inc.,

  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the

  * GNU General Public License and visit http://melati.org to obtain the

  * Melati Software License.

  *

  * Feel free to contact the Developers of Melati (http://melati.org),

  * if you would like to work out a different arrangement than the options

  * outlined here.  It is our intention to allow Melati to be used by as

  * wide an audience as possible.

  *

  * 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 General Public License for more details.

  *

  * Contact details for copyright holder:

  *

  *     Tim Pizey <timp At paneris.org>

  *     http://paneris.org/~timp

  */

 package org.melati.poem;

 import java.util.Collection;

 import java.util.Collections;

 import java.util.Map;

 import java.util.Set;

 /**

  * @author timp

  * @since 8 Jun 2007

  *

  */

 public class TableMap<P extends Persistent> implements Map<Integer, P> {

   protected Table<P> table;

   /**

    * Constructor.

    */

   public TableMap() {

   }

   /**

    * Constructor given a Table.

    */

   public TableMap(Table<P> t) {

     this.table = t;

   }

   /**

    * @return the table

    */

   public Table<P> getTable() {

     return table;

   }

   /**

    * @param table the table to set

    */

   public void setTable(Table<P> table) {

     this.table = table;

   }

   /** 

    * @see java.util.Map#clear()

    */

   @Override

   public void clear() {

     throw new UnsupportedOperationException();

   }

   /** 

    * @see java.util.Map#containsKey(java.lang.Object)

    */

   @Override

   public boolean containsKey(Object key) {

     if (key == null)

       return false;

     else {

       try { 

         table.getObject((Integer)key); 

         return true;

       } catch (NoSuchRowPoemException e) { 

         return false;

       }

     }

   }

   /** 

    * @see java.util.Map#containsValue(java.lang.Object)

    */

   @Override

   public boolean containsValue(Object value) {

     Integer troid  = ((Persistent)value).troid();

     return containsKey(troid);

   }

   /** 

    * @see java.util.Map#entrySet()

    */

   @Override

   public Set<Map.Entry<Integer, P>> entrySet() {

     throw new UnsupportedOperationException();

   }

   /** 

    * @see java.util.Map#get(java.lang.Object)

    */

   @Override

   public P get(Object key) {

     return table.getObject((Integer)key);

   }

   /** 

    * @see java.util.Map#isEmpty()

    */

   @Override

   public boolean isEmpty() {

     return table.cachedCount((String)null).count() == 0;

   }

   /** 

    * @see java.util.Map#keySet()

    */

   @Override

   public Set<Integer> keySet() {

     throw new UnsupportedOperationException();

   }

   /** 

    * @see java.util.Map#put

    */

   @Override

   public P put(Integer arg0, Persistent arg1) {

     throw new UnsupportedOperationException();

   }

   /** 

    * @see java.util.Map#remove(java.lang.Object)

    */

   @Override

   public P remove(Object key) {

     P p = table.getObject((Integer)key);

     if (p != null)

       p.delete();

     return p;

   }

   /** 

    * @see java.util.Map#size()

    */

   @Override

   public int size() {

     return table.cachedCount((String)null).count();

   }

   /** 

    * @see java.util.Map#values()

    */

   @Override

   public Collection<P> values() {

     return Collections.list(table.selection());

   }

   @Override

   public void putAll(Map<? extends Integer, ? extends P> arg0) {

     throw new UnsupportedOperationException();

   }

 }