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package org.gvsig.fmap.dal.feature;

import java.util.List;

import org.gvsig.fmap.dal.exceptions.DataException;

import org.gvsig.tools.observer.WeakReferencingObservable;

/**

 * Record to stack the commands. 

 * This record is a command stack whose purpose is to give support and manage undo and re-do operations.

 *

 * @author Vicente Caballero Navarro

 */

public interface CommandsRecord {

        /**

         *  Removes all the elements from this Record.

         */

//        public void clear();

        /**

         *  Appends the specified command to the undos stack and delete all redos commands.

         */

        // public void add( Command command);

    /**

     * Undoes a command. Pops the UNDO stack, executes the obtained command and puts it onto the REDO stack.

     *

     * @throws DataException

     */

//        public void undo() throws DataException;

    /**

     * Re-does a command. Pops the REDO stack, executes the obtained command and puts it onto the UNDO stack.

     *

     * @throws DataException

     */

//        public void redo() throws DataException;

        // public Command getNextUndoCommand();

        // public Command getNextRedoCommand();

        /**

         * Returns the number of elements in this Record.

         */

//        public int size();

        /*

         * Returns the position of pointer in this Record.

         */

        // public int getPointer();

        /*

         * Insert and update the position of pointer in this Record.

         */

        // public void setPointer(int pos);

        /**

         * Returns the list of commands in the UNDO stack

         * 

         * @return list of Command in the UNDO stack

         */

        public List getUndoCommands();

        /**

         * Returns the list of command in the REDO stack

         * 

         * @return list of Command in the REDO stack

         */

        public List getRedoCommands();

        // public boolean moreUndoCommands();

        // public boolean moreRedoCommands();

        // public List getCommandsFeatureDeleted();

        // public List getCommandsFeatureUpdated();

        // public List getCommandsFeatureInserted();

        // public void insert(Object obj);

        // public void delete(Object obj);

        // public void update(Object obj, Object oldObj);

        // public List getCommandsAttributeDeleted();

        // public List getCommandsAttributeUpdated();

        // public List getCommandsAttributeInserted();

        // public void startComplex();

        // public void endComplex(String description);

}