/**************************************************************************************
* 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.plan;
import com.espertech.esper.client.EventType;
import com.espertech.esper.epl.join.exec.base.ExecNode;
import com.espertech.esper.epl.join.exec.base.TableLookupExecNode;
import com.espertech.esper.epl.join.exec.base.JoinExecTableLookupStrategy;
import com.espertech.esper.epl.join.table.EventTable;
import com.espertech.esper.epl.join.table.HistoricalStreamIndexList;
import com.espertech.esper.util.IndentWriter;
import com.espertech.esper.epl.virtualdw.VirtualDWView;
import com.espertech.esper.view.Viewable;
import java.lang.annotation.Annotation;
import java.util.HashSet;
import java.util.Map;
/**
* Specifies exection of a table lookup using the supplied plan for performing the lookup.
*/
public class TableLookupNode extends QueryPlanNode
{
private TableLookupPlan tableLookupPlan;
/**
* Ctor.
* @param tableLookupPlan - plan for performing lookup
*/
public TableLookupNode(TableLookupPlan tableLookupPlan)
{
this.tableLookupPlan = tableLookupPlan;
}
/**
* Returns lookup plan.
* @return lookup plan
*/
protected TableLookupPlan getLookupStrategySpec()
{
return tableLookupPlan;
}
public void print(IndentWriter writer)
{
writer.println("TableLookupNode " +
" tableLookupPlan=" + tableLookupPlan);
}
public ExecNode makeExec(String statementName, String statementId, Annotation[] annotations, Map<String, EventTable>[] indexesPerStream, EventType[] streamTypes, Viewable[] streamViews, HistoricalStreamIndexList[] historicalStreamIndexLists, VirtualDWView[] viewExternal)
{
JoinExecTableLookupStrategy lookupStrategy = tableLookupPlan.makeStrategy(statementName, statementId, annotations, indexesPerStream, streamTypes, viewExternal);
return new TableLookupExecNode(tableLookupPlan.getIndexedStream(), lookupStrategy);
}
public void addIndexes(HashSet<String> usedIndexes) {
usedIndexes.add(tableLookupPlan.getIndexNum());
}
}