Android Open Source - mapped Location Database

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License

The source code is released under:

Apache License

Java Source Code

package com.chalmers.frapp.database;
/*from  w w w  . j a  v a  2s  .  com*/
import java.util.Collection;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;

/**
 * This class is the general database which stores
 * all buildings, their rooms and entrances.
 */
public class LocationDatabase {

  /**
   * A map holding all buildings for fast lookup by name.
   */
  private final Map<String, Building> buildings;

  /**
   * Construct a new empty database.
   */
  public LocationDatabase() {
    buildings = new TreeMap<String, Building>();
  }

  /**
   * Get all buildings in this database.
   * @return A collection of all buildings in this database
   */
  public Collection<Building> getBuildings() {
    return buildings.values();
  }

  /**
   * Get all rooms in this database identified as a string using the
   * following format.
   * 
   * "<Building name>, <Room name>"
   * 
   * @return A list of strings identifying each room in this database
   */
  public List<String> getStrings() {
    List<String> result = new LinkedList<String>();
    for(Building b : getBuildings()) {
      for(Room r : b.getRooms()) {
        result.add(b.getName() + ", " + r.getName());
      }
    }
    return result;
  }

  /**
   * Get all rooms in this database by category, identified as a string
   * using the following format.
   * 
   * "<Building name>, <Room name>"
   * 
   * @return A list of strings identifying each room in this database
   */
  public List<String> getStrings(String category) {
    List<String> result = new LinkedList<String>();
    for(Building b : getBuildings()) {
      for(Room r : b.getRooms(category)) {
        result.add(b.getName() + ", " + r.getName());
      }
    }
    return result;
  }
  
  /**
   * Add a new building to this database.
   * 
   * @param buildingName A string representing the name of a building
   * @return The new building added to this database
   */
  public Building addBuilding(String buildingName) {
    Building result = new Building(buildingName);
    buildings.put(buildingName, result);
    return result;
  }

  /**
   * Find a specific building by name.
   * 
   * @param buildingName A string representing the building name to find
   * @return A building with the given name or null if no such building exists
   */
  public Building findBuilding(String buildingName) {
    return buildings.get(buildingName);
  }

  /**
   * Get all categories across all buildings and rooms.
   * 
   * @return A set containing every category available in this database
   */
  public Set<String> getAllCategories() {
    Set<String> availableCategories = new HashSet<String>();
    for(Building building : getBuildings()) {
      availableCategories.addAll(building.getAvailableCategories());
    }
    return availableCategories;
  }
}

Java Source Code List

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