CollectionChange.java

/**
 *   GRANITE DATA SERVICES
 *   Copyright (C) 2006-2015 GRANITE DATA SERVICES S.A.S.
 *
 *   This file is part of the Granite Data Services Platform.
 *
 *   Granite Data Services 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 2.1 of the License, or (at your option) any later version.
 *
 *   Granite Data Services 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 library; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 *   USA, or see <http://www.gnu.org/licenses/>.
 */
package org.granite.tide.data;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;


/**
 * @author William DRAI
 */
public class CollectionChange implements Externalizable {

    private static final long serialVersionUID = 1L;

    private int type;
    private Object key;
    private Object value;
	
    
    public CollectionChange() {
    }
    
    public CollectionChange(int type, Object key, Object value) {
    	this.type = type;
    	this.key = key;
    	this.value = value;
    }

	public int getType() {
		return type;
	}

	public Object getKey() {
		return key;
	}

	public Object getValue() {
		return value;
	}
	
	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder("{");
		sb.append(type == 1 ? "add" : (type == -1 ? "remove" : "update"));
		sb.append("@").append(key).append("=").append(value);
		sb.append("}");
		return sb.toString();
	}
	
	public void writeExternal(ObjectOutput out) throws IOException {
		out.writeObject(type);
		out.writeObject(key);
		out.writeObject(value);
	}

	public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
		type = ((Integer)in.readObject());
		key = in.readObject();
		value = in.readObject();
	}
}