com.espertech.esper.epl.join.plan.TableOuterLookupNode Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of esper Show documentation
Complex event processing and event series analysis component
There is a newer version: 7.1.0
/*
 ***************************************************************************************
 *  Copyright (C) 2006 EsperTech, Inc. All rights reserved.                            *
 *  http://www.espertech.com/esper                                                     *
 *  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.JoinExecTableLookupStrategy;
import com.espertech.esper.epl.join.exec.base.TableOuterLookupExecNode;
import com.espertech.esper.epl.join.exec.base.TableOuterLookupExecNodeTableLocking;
import com.espertech.esper.epl.join.table.EventTable;
import com.espertech.esper.epl.join.table.HistoricalStreamIndexList;
import com.espertech.esper.epl.virtualdw.VirtualDWView;
import com.espertech.esper.util.IndentWriter;
import com.espertech.esper.view.Viewable;

import java.lang.annotation.Annotation;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Map;
import java.util.concurrent.locks.Lock;

/**
 * Specifies exection of a table lookup with outer join using the a specified lookup plan.
 */
public class TableOuterLookupNode extends QueryPlanNode {
    private TableLookupPlan tableLookupPlan;

    /**
     * Ctor.
     *
     * @param tableLookupPlan - plan for performing lookup
     */
    public TableOuterLookupNode(TableLookupPlan tableLookupPlan) {
        this.tableLookupPlan = tableLookupPlan;
    }

    /**
     * Returns lookup plan.
     *
     * @return lookup plan
     */
    public TableLookupPlan getLookupStrategySpec() {
        return tableLookupPlan;
    }

    public void print(IndentWriter writer) {
        writer.println("TableOuterLookupNode " +
                " tableLookupPlan=" + tableLookupPlan);
    }

    public ExecNode makeExec(String statementName, int statementId, Annotation[] annotations, Map[] indexesPerStream, EventType[] streamTypes, Viewable[] streamViews, HistoricalStreamIndexList[] historicalStreamIndexLists, VirtualDWView[] viewExternal, Lock[] tableSecondaryIndexLocks) {
        JoinExecTableLookupStrategy lookupStrategy = tableLookupPlan.makeStrategy(statementName, statementId, annotations, indexesPerStream, streamTypes, viewExternal);
        int indexedStream = tableLookupPlan.getIndexedStream();
        if (tableSecondaryIndexLocks[indexedStream] != null) {
            return new TableOuterLookupExecNodeTableLocking(indexedStream, lookupStrategy, tableSecondaryIndexLocks[indexedStream]);
        }
        return new TableOuterLookupExecNode(tableLookupPlan.getIndexedStream(), lookupStrategy);
    }

    public void addIndexes(HashSet usedIndexes) {
        usedIndexes.addAll(Arrays.asList(tableLookupPlan.getIndexNum()));
    }
}