ViewElementFactory.java

/*******************************************************************************
 * MontiCore Language Workbench
 * Copyright (c) 2015, 2016, MontiCore, All rights reserved.
 *  
 * This project is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3.0 of the License, or (at your option) any later version.
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this project. If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
package de.monticore.genericgraphics.model.graphics;

import java.util.List;

import org.eclipse.draw2d.geometry.Point;

import de.monticore.genericgraphics.model.graphics.impl.EdgeViewElement;
import de.monticore.genericgraphics.model.graphics.impl.ShapeViewElement;


/**
 * <p>
 * Factory for creation of {@link IViewElement IViewElements}.
 * </p>
 * 
 * @author Tim Enger
 */
public class ViewElementFactory {
  
  private static ViewElementFactory factory = null;
  
  private ViewElementFactory() {
  }
  
  private static void check() {
    if (factory == null) {
      factory = new ViewElementFactory();
    }
  }
  
  /**
   * Factory method for {@link IShapeViewElement IShapeViewElements}.
   * 
   * @param identifier The identifier of the element
   * @param x The x position
   * @param y The y position
   * @param width The width
   * @param height The height
   * @return The created {@link IShapeViewElement}.
   */
  public static IShapeViewElement createShapeViewElement(String identifier, int x, int y, int width, int height) {
    check();
    return factory.doCreateShapeViewElement(identifier, x, y, width, height);
  }
  
  /**
   * Factory method for {@link IShapeViewElement IShapeViewElements}.
   * 
   * @param identifier The identifier of the element
   * @param x The x position
   * @param y The y position
   * @param width The width
   * @param height The height
   * @return The created {@link IShapeViewElement}.
   */
  protected IShapeViewElement doCreateShapeViewElement(String identifier, int x, int y, int width, int height) {
    return new ShapeViewElement(identifier, x, y, width, height);
  }
  
  /**
   * <p>
   * Factory method for {@link IEdgeViewElement IEdgeViewElements}
   * </p>
   * 
   * @param identifier The identifier of the element
   * @param source The source element identifier
   * @param target The target element identifier
   * @param constraints The list of {@link Point points} as constraints of for
   *          element
   * @return The created {@link IEdgeViewElement}.
   */
  public static IEdgeViewElement createEdgeViewElement(String identifier, String source, String target, List<Point> constraints) {
    check();
    return factory.doCeateEdgeViewElement(identifier, source, target, constraints);
  }
  
  /**
   * <p>
   * Factory method for {@link IEdgeViewElement IEdgeViewElements}
   * </p>
   * 
   * @param identifier The identifier of the element
   * @param source The source element identifier
   * @param target The target element identifier
   * @param constraints The list of {@link Point points} as constraints of for
   *          element
   * @return The created {@link IEdgeViewElement}.
   */
  protected IEdgeViewElement doCeateEdgeViewElement(String identifier, String source, String target, List<Point> constraints) {
    return new EdgeViewElement(identifier, source, target, constraints, null, null);
  }
  
  /**
   * <p>
   * Factory method for {@link IEdgeViewElement IEdgeViewElements}
   * </p>
   * 
   * @param identifier The identifier of the element
   * @param source The source element identifier
   * @param target The target element identifier
   * @param constraints The constraints of the element
   * @return The created {@link IEdgeViewElement}.
   */
  public static IEdgeViewElement createEdgeViewElement(String identifier, String source, String target, Object constraints) {
    check();
    return factory.doCreateEdgeViewElement(identifier, source, target, constraints);
  }
  
  /**
   * <p>
   * Factory method for {@link IEdgeViewElement IEdgeViewElements}
   * </p>
   * 
   * @param identifier The identifier of the element
   * @param source The source element identifier
   * @param target The target element identifier
   * @param constraints The constraints of the element
   * @return The created {@link IEdgeViewElement}.
   */
  protected IEdgeViewElement doCreateEdgeViewElement(String identifier, String source, String target, Object constraints) {
    return new EdgeViewElement(identifier, source, target, constraints, null, null);
  }
}