Android Open Source - RZAndroidBaseUtils Mappable Set

• Back to Development/utility  ↑

From Project

Back to project page RZAndroidBaseUtils.

License

The source code is released under:

MIT License

Java Source Code

package com.raizlabs.collections;
//  ww  w  . j  av  a2s . c om
import com.raizlabs.functions.Delegate;


/**
 * A class which contains a set of items and can perform an actions across all
 * items in the set.
 * 
 * @author Dylan James
 *
 * @param <T> The type of item stored in the set.
 */
public class MappableSet<T> {
  
  private TransactionalHashSet<T> members;
  
  /**
   * Creates a new empty {@link MappableSet}.
   */
  public MappableSet() {
    members = new TransactionalHashSet<T>();
  }
  
  
  /**
   * Adds the given item to the set.
   * @param item The item to add.
   */
  public <E extends T> void add(E item) {
    members.add(item);
  }
  
  /**
   * Removes the given item from the set.
   * @param item The item to remove.
   * @return True if the item was removed, false if it wasn't found in the
   * set.
   */
  public <E extends T> boolean remove(E item) {
    return members.remove(item);
  }
  
  /**
   * Removes all items from this set.
   */
  public void clear() {
    members.clear();
  }
  
  /**
   * Returns true if the given item is found in the set.
   * @param item The item to look for.
   * @return True if the item was found, false if it is not.
   */
  public <E extends T> boolean contains(E item) {
    return members.contains(item);
  }
  
  /**
   * @return The number of items in this set.
   */
  public int size() {
    return members.size();
  }
  

  /**
   * Calls the given {@link Delegate} on all items in the set. Items may be
   * added or removed during this call, but changes may not be reflected
   * until this completes.
   * @param function The {@link Delegate} to call for each item.
   */
  public void map(Delegate<T> function) {
    members.beginTransaction();
    for (T member : members) {
      function.execute(member);
    }
    members.endTransaction();
  }
}

Java Source Code List

• Back to Development/utility  ↑