/*
* 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.service.slice;
import java.util.List;
import java.util.Map;
import org.apache.openjpa.slice.QueryTargetPolicy;
import org.apache.openjpa.trader.domain.Stock;
import org.apache.openjpa.trader.domain.Tradable;
import org.apache.openjpa.trader.service.TradingService;
/**
* An example of a {@link QueryTargetPolicy query target policy} that directs the query based
* on its parameters.
*
* @author Pinaki Poddar
*
*/
public class SectorBasedQueryTargetPolicy implements QueryTargetPolicy {
@Override
public String[] getTargets(String query, Map<Object, Object> params,
String language, List<String> slices, Object context) {
Stock stock = null;
if (TradingService.MATCH_ASK.equals(query)) {
stock = ((Tradable)params.get("ask")).getStock();
} else if (TradingService.MATCH_BID.equals(query)) {
stock = ((Tradable)params.get("bid")).getStock();
}
return stock != null ? new String[]{slices.get(stock.getSector().ordinal())} : null;
}
}