IDCreationStrategyImpl.java

/*
 * Copyright (c) 2012, 2013 Hemanta Sapkota.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * Hemanta Sapkota (laex.pearl@gmail.com)
 */
package com.laex.cg2d.model.model.impl;

import org.apache.commons.lang.StringUtils;

import com.laex.cg2d.model.model.EditorShapeType;
import com.laex.cg2d.model.model.GameModel;
import com.laex.cg2d.model.model.IDCreationStrategy;
import com.laex.cg2d.model.model.Shape;

/**
 * The Class IDCreationStrategyImpl.
 */
public class IDCreationStrategyImpl implements IDCreationStrategy {

  /** The box format. */
  private static String BOX_FORMAT = "box%d";

  /** The circle format. */
  private static String CIRCLE_FORMAT = "circle%d";

  /** The entity format. */
  private static String ENTITY_FORMAT = "entity%d";

  /** The edge format. */
  private static String EDGE_FORMAT = "edge%d";

  /** The background format. */
  private static String BACKGROUND_FORMAT = "bg%d";

  /** The model. */
  private GameModel model;

  /**
   * Instantiates a new iD creation strategy impl.
   * 
   * @param model
   *          the model
   */
  public IDCreationStrategyImpl(GameModel model) {
    this.model = model;
  }

  /*
   * (non-Javadoc)
   * 
   * @see
   * com.laex.cg2d.model.model.IDCreationStrategy#newId(com.laex.cg2d.model.
   * model.EditorShapeType)
   */
  @Override
  public String newId(EditorShapeType type) {
    switch (type) {

    case BACKGROUND_SHAPE:
      return newBackgroundId(type);

    case ENTITY_SHAPE:
      return newEntityId(type);

    case SIMPLE_SHAPE_BOX:
      return newBoxId(type);

    case SIMPLE_SHAPE_CIRCLE:
      return newCirlceId(type);

    case SIMPLE_SHAPE_HEDGE:
      return newEdgeId(type);

    case SIMPLE_SHAPE_VEDGE:
      return newEdgeId(type);

    default:

    }

    return "otherId";
  }

  /*
   * (non-Javadoc)
   * 
   * @see
   * com.laex.cg2d.model.model.IDCreationStrategy#isIdUsed(com.laex.cg2d.model
   * .model.EditorShapeType, java.lang.String)
   */
  @Override
  public boolean isIdUsed(EditorShapeType type, String id) {
    boolean used = false;
    for (Shape shp : model.getDiagram().getChildren()) {
      if (shp.getEditorShapeType() == type) {
        if (shp.getId().endsWith(id) && !StringUtils.isEmpty(id)) {
          used = true;
          break;
        }
      }
    }
    return used;
  }

  /**
   * Gets the available id.
   * 
   * @param type
   *          the type
   * @return the available id
   */
  private int getAvailableId(EditorShapeType type) {
    int id = 0;
    for (Shape shp : this.model.getDiagram().getChildren()) {
      if (shp.getEditorShapeType() == type) {
        String idStr = String.valueOf(id);
        if (!isIdUsed(shp.getEditorShapeType(), idStr)) {
          return id;
        }
        ++id;
      }
    }

    return id;
  }

  /**
   * New box id.
   * 
   * @param type
   *          the type
   * @return the string
   */
  private String newBoxId(EditorShapeType type) {
    return String.format(BOX_FORMAT, getAvailableId(type));
  }

  /**
   * New cirlce id.
   * 
   * @param type
   *          the type
   * @return the string
   */
  private String newCirlceId(EditorShapeType type) {
    return String.format(CIRCLE_FORMAT, getAvailableId(type));
  }

  /**
   * New entity id.
   * 
   * @param type
   *          the type
   * @return the string
   */
  private String newEntityId(EditorShapeType type) {
    return String.format(ENTITY_FORMAT, getAvailableId(type));
  }

  /**
   * New edge id.
   * 
   * @param type
   *          the type
   * @return the string
   */
  private String newEdgeId(EditorShapeType type) {
    return String.format(EDGE_FORMAT, getAvailableId(type));
  }

  /**
   * New background id.
   * 
   * @param type
   *          the type
   * @return the string
   */
  private String newBackgroundId(EditorShapeType type) {
    return String.format(BACKGROUND_FORMAT, getAvailableId(type));
  }

}