/*
* 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.openjpa.trader.client.event;
import org.apache.openjpa.trader.client.OpenTrader;
import org.apache.openjpa.trader.client.event.ServiceEventHandler.UpdateStockHandler;
import org.apache.openjpa.trader.domain.Stock;
import org.apache.openjpa.trader.domain.Tradable;
import org.apache.openjpa.trader.domain.Trade;
import com.google.gwt.event.shared.EventHandler;
import com.google.gwt.event.shared.GwtEvent;
import com.google.gwt.event.shared.GwtEvent.Type;
/**
* Specialization of GWTEvent (that represent mouse/keybord events and DOM events)
* for service related events such as a new trade has been committed or a tradable
* is consumed. Each service event carries a payload and one or more handlers can
* register interest in that event via the
* {@link OpenTrader#registerHandler(com.google.gwt.event.shared.GwtEvent.Type, EventHandler)
* application controller}.
*
* @author Pinaki Poddar
*
* @param <T>
* @param <H>
*/
public abstract class ServiceEvent<T, H extends EventHandler> extends GwtEvent<H> {
private final T payload;
protected ServiceEvent(T data) {
payload = data;
}
public final T getPayload() {
return payload;
}
public static class TradableAdded extends ServiceEvent<Tradable, ServiceEventHandler.AddTradableHandler> {
public static Type<ServiceEventHandler.AddTradableHandler> TYPE =
new Type<ServiceEventHandler.AddTradableHandler>();
public TradableAdded(Tradable tradable) {
super(tradable);
}
@Override
protected void dispatch(ServiceEventHandler.AddTradableHandler handler) {
handler.onTradableAdded(this);
}
@Override
public Type<ServiceEventHandler.AddTradableHandler> getAssociatedType() {
return TYPE;
}
}
public static class TradableRemoved extends ServiceEvent<Tradable, ServiceEventHandler.RemoveTradableHandler> {
public static Type<ServiceEventHandler.RemoveTradableHandler> TYPE =
new Type<ServiceEventHandler.RemoveTradableHandler>();
public TradableRemoved(Tradable tradable) {
super(tradable);
}
@Override
protected void dispatch(ServiceEventHandler.RemoveTradableHandler handler) {
handler.onTradableRemoved(this);
}
@Override
public Type<ServiceEventHandler.RemoveTradableHandler> getAssociatedType() {
return TYPE;
}
}
public static class StockUpdated extends ServiceEvent<Stock,UpdateStockHandler> {
public static Type<UpdateStockHandler> TYPE = new Type<UpdateStockHandler>();
public StockUpdated(Stock stock) {
super(stock);
}
@Override
protected void dispatch(UpdateStockHandler handler) {
handler.onStockUpdated(this);
}
@Override
public Type<UpdateStockHandler> getAssociatedType() {
return TYPE;
}
}
public static class TradeCommitted extends ServiceEvent<Trade, ServiceEventHandler.AddTradeHandler> {
public static Type<ServiceEventHandler.AddTradeHandler> TYPE =
new Type<ServiceEventHandler.AddTradeHandler>();
public TradeCommitted(Trade trade) {
super(trade);
}
@Override
protected void dispatch(ServiceEventHandler.AddTradeHandler handler) {
handler.onTradeCommitted(this);
}
@Override
public Type<ServiceEventHandler.AddTradeHandler> getAssociatedType() {
return TYPE;
}
}
}