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/*
Copyright 2008-2010 Gephi
Authors : Eduardo Ramos 
Website : http://www.gephi.org

This file is part of Gephi.

DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

Copyright 2011 Gephi Consortium. All rights reserved.

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General Public License Version 3 only ("GPL") or the Common
Development and Distribution License("CDDL") (collectively, the
"License"). You may not use this file except in compliance with the
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or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the
specific language governing permissions and limitations under the
License.  When distributing the software, include this License Header
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 */
package org.gephi.datalab.spi;

import javax.swing.Icon;
import org.gephi.datalab.spi.nodes.NodesManipulator;

/**
 * General and abstract manipulation action to use for Data Laboratory table UI and other actions like Graph context menu items in Overview.
 * Different subtypes of manipulators are defined for every type of action in the UI.
 * All manipulator types are able to:
 * 
 *  Execute an action
 *  Provide a name, description, type and order of appearance (position in group of its type)
 *  Indicate wether they have to be executable (enabled in the context menu) or not
 *  Provide and UI or not
 *  Provide and icon or not
 * 
 * Used for different manipulators such as NodesManipulator, EdgesManipulator and GeneralActionsManipulator.
 * The only methods that are called before setting up a manipulator (subtypes have special setup methods) with the data are getType and getPosition.
 * This way, the other methods behaviour can depend on the data that has been setup before
 * @see NodesManipulator
 * @author Eduardo Ramos
 */
public interface Manipulator {

    /**
     * Execute this Manipulator.
     * It will operate with data like nodes and edges previously setup for the type of manipulator.
     */
    void execute();

    /**
     * Return name to show for this Manipulator on the ui.
     * Implementations can provide different names depending on the data this
     * Manipulator has (for example depending on the number of nodes in a NodesManipulator).
     * @return Name to show at current time and conditions
     */
    String getName();

    /**
     * Description of the Manipulator.
     * @return Description
     */
    String getDescription();

    /**
     * Indicates if this Manipulator has to be executable.
     * Implementations should evaluate the current data and conditions.
     * @return True if it has to be executable, false otherwise
     */
    boolean canExecute();

    /**
     * Returns a ManipulatorUI for this Manipulator if it needs one.
     * @return ManipulatorUI for this Manipulator or null
     */
    ManipulatorUI getUI();

    /**
     * Type of manipulator. This is used for separating the manipulators
     * in groups when shown, using popup separators. First types to show will be the lesser.
     * @return Type of this manipulator
     */
    int getType();

    /**
     * Returns a position value that indicates the position
     * of this Manipulator in its type group. Less means upper.
     * @return This Manipulator position
     */
    int getPosition();

    /**
     * Returns an icon for this manipulator if necessary.
     * @return Icon for the manipulator or null
     */
    Icon getIcon();
}