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/**
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sdo.api;
import commonj.sdo.Property;
/**
* An experimental Tuscany API interface, subject to possible change,
* to permit notification of change events on a DataObject instance
*/
public interface Event {
Object getNotifier();
/**
* constants returned from getEventType()
*/
int SET = 1;
int UNSET = 2;
int ADD = 3;
int REMOVE = 4;
int ADD_MANY = 5;
int REMOVE_MANY = 6;
int MOVE = 7;
int REMOVE_LISTENER = 8;
int getEventType();
/**
* get the Property for which the value changed
*/
Property getProperty();
Object getOldValue();
Object getNewValue();
/*
* returns true if the Property value was in state "set" before this change occurred.
*/
boolean wasSet();
boolean isTouch();
int NO_INDEX = -1;
int getPosition();
}
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