/*

 * Copyright (C) 2020, University of the Basque Country (UPV/EHU)

 *  Contact for licensing options: <licensing-mcpttclient(at)mcopenplatform(dot)com>
 *
 * The original file was part of Open Source IMSDROID
 *  Copyright (C) 2010-2011, Mamadou Diop.
 *  Copyright (C) 2011, Doubango Telecom.
 *
 *
 * Contact: Mamadou Diop <diopmamadou(at)doubango(dot)org>
 *
 * This file is part of Open Source Doubango Framework.
 *
 * This is free software: you can redistribute it and/or modify it under the terms of
 * the GNU General Public License as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 *
 * This 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 package org.doubango.ngn.utils;
 
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 import java.util.Observable;
 import java.util.Observer;
 
 public class NgnObservableList<T> extends NgnObservableObject implements Observer {
 	private final List<T> mList;
 	private boolean mWatchValueChanged;
 	
 	public NgnObservableList(boolean watchValueChanged){
 		super();
 		mList = new ArrayList<T>();
 		if((mWatchValueChanged = watchValueChanged)){
 			
 		}
 	}
 	
 	public NgnObservableList(){
 		this(false);
 	}
 	
 	public List<T> getList(){
 		return mList;
 	}
 	
 	public List<T> filter(NgnPredicate<T> predicate) {
 		return NgnListUtils.filter(mList, predicate);
 	}
 	
 	public boolean add(T object){
 		int location = mList.size();
 		this.add(location, object);
 		return true;
 	}
 	
 	// FIXME: refactor
 	public void add(T objects[]){
 		for(T object : objects){
 			mList.add(object);
 			if(mWatchValueChanged && object instanceof Observable){
 				((Observable)object).addObserver(this);
 			}
 		}
 		super.setChangedAndNotifyObservers(null);
 	}
 	
 	// FIXME: refactor
 	public void add(Collection<T> list){
 		for(T object : list){
 			mList.add(object);
 			if(mWatchValueChanged && object instanceof Observable){
 				((Observable)object).addObserver(this);
 			}
 		}
 		super.setChangedAndNotifyObservers(null);
 	}
 	
 	public void add(int location, T object){
 		mList.add(location, object);
 		if(mWatchValueChanged && object instanceof Observable){
 			((Observable)object).addObserver(this);
 		}
 		super.setChangedAndNotifyObservers(null);
 	}
 	
 	public T remove(int location){
 		T result = mList.remove(location);
 		if(result != null && result instanceof Observable){
 			((Observable)result).deleteObserver(this);
 		}
 		super.setChangedAndNotifyObservers(result);
 		return result;
 	}
 	
 	public boolean remove(T object){
 		if(object == null){
 			return false;
 		}
 		boolean result = mList.remove(object);
 		if(result && object instanceof Observable){
 			((Observable)object).deleteObserver(this);
 		}
 		super.setChangedAndNotifyObservers(result);
 		return result;
 	}
 	
 	public boolean removeAll(Collection<T> objects){
 		if(objects == null){
 			return false;
 		}
 		for(T object : objects){
 			if(object instanceof Observable){
 				((Observable)object).deleteObserver(this);
 			}
 		}
 		boolean result = mList.removeAll(objects);
 		super.setChangedAndNotifyObservers(result);
 		return result;
 	}
 	
 	public void clear(){
 		for(T object : mList){
 			if(object instanceof Observable){
 				((Observable)object).deleteObserver(this);
 			}
 		}
 		mList.clear();
 		super.setChangedAndNotifyObservers(null);
 	}
 	
 	public void setWatchValueChanged(boolean watchValueChanged){
 		mWatchValueChanged = watchValueChanged;
 	}
 
 	@Override
 	public void update(Observable observable, Object data) {
 		super.setChangedAndNotifyObservers(data);
 	}
 }