Android Open Source - smsgateway-android Event

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 *//  w  w  w. jav  a 2s .c om
 * suco: Mini IoC framework a-la-guice style for GWT
 *
 * (c) 2009 The suco development team (see CREDITS for details)
 * This file is part of emite.
 *
 * This program 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 of the
 * License, or (at your option) any later version.
 *
 * This program 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 program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package com.calclab.suco.client.events;

import java.util.ArrayList;

import com.calclab.suco.client.log.Logger;

public class Event<T> {
    private ArrayList<Listener<T>> listeners;
    private final String id;
    private ArrayList<Listener<T>> toAdd;
    private ArrayList<Listener<T>> toRemove;

    public Event(final String id) {
  this.id = id;
  listeners = null;
  toAdd = null;
    }

    public void add(final Listener<T> listener) {
  if (toAdd == null) {
      toAdd = new ArrayList<Listener<T>>();
  }
  toAdd.add(listener);
    }

    public void fire(final T event) {
  Logger.debug("Signal {0} fired with event: {1}", id, event);
  addPending();
  removePending();
  fire(event, listeners);
  fire(event, toAdd);
  addPending();
  removePending();
    }

    public void remove(final Listener<T> listener) {
  if (toRemove == null) {
      toRemove = new ArrayList<Listener<T>>();
  }
  toRemove.add(listener);
    }

    private void addPending() {
  if (toAdd != null) {
      if (listeners == null) {
    this.listeners = new ArrayList<Listener<T>>();
      }
      listeners.addAll(toAdd);
      toAdd = null;
  }
    }

    private void fire(final T event, final ArrayList<Listener<T>> listenerList) {
  if (listenerList != null) {
      for (final Listener<T> listener : listenerList) {
    listener.onEvent(event);
      }
  }
    }

    private void removePending() {
  if (toRemove != null) {
      if (listeners != null) {
    listeners.removeAll(toRemove);
      }
      toRemove = null;
  }
    }
}

Java Source Code List

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