/**************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package com.espertech.esper.epl.join.pollindex;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.EventType;
import com.espertech.esper.epl.join.table.EventTable;
import com.espertech.esper.epl.join.table.PropertyCompositeEventTableFactory;
import com.espertech.esper.epl.join.table.UnindexedEventTableList;
import java.util.Arrays;
import java.util.List;
/**
* Strategy for building an index out of poll-results knowing the properties to base the index on.
*/
public class PollResultIndexingStrategyComposite implements PollResultIndexingStrategy
{
private final int streamNum;
private final EventType eventType;
private final String[] indexPropertiesJoin;
private final Class[] keyCoercionTypes;
private final String[] rangePropertiesJoin;
private final Class[] rangeCoercionTypes;
/**
* Ctor.
* @param streamNum is the stream number of the indexed stream
* @param eventType is the event type of the indexed stream
*/
public PollResultIndexingStrategyComposite(int streamNum, EventType eventType, String[] indexPropertiesJoin, Class[] keyCoercionTypes, String[] rangePropertiesJoin, Class[] rangeCoercionTypes)
{
this.streamNum = streamNum;
this.eventType = eventType;
this.keyCoercionTypes = keyCoercionTypes;
this.indexPropertiesJoin = indexPropertiesJoin;
this.rangePropertiesJoin = rangePropertiesJoin;
this.rangeCoercionTypes = rangeCoercionTypes;
}
public EventTable index(List<EventBean> pollResult, boolean isActiveCache)
{
if (!isActiveCache)
{
return new UnindexedEventTableList(pollResult, streamNum);
}
PropertyCompositeEventTableFactory factory = new PropertyCompositeEventTableFactory(streamNum, eventType, indexPropertiesJoin, keyCoercionTypes, rangePropertiesJoin, rangeCoercionTypes);
EventTable table = factory.makeEventTable();
table.add(pollResult.toArray(new EventBean[pollResult.size()]));
return table;
}
public String toQueryPlan() {
return this.getClass().getSimpleName() +
" hash " + Arrays.toString(indexPropertiesJoin) +
" btree " + Arrays.toString(rangePropertiesJoin) +
" key coercion " + Arrays.toString(keyCoercionTypes) +
" range coercion " + Arrays.toString(rangeCoercionTypes);
}
}