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Complex event processing and event series analysis component

There is a newer version: 7.1.0

/*
 * *************************************************************************************
 *  Copyright (C) 2006-2015 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.agg.access;

import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
import com.espertech.esper.epl.table.mgmt.TableMetadata;

/**
 * Represents the aggregation accessor that provides the result for the "maxBy" aggregation function.
 */
public class AggregationAccessorMinMaxByTable extends AggregationAccessorMinMaxByBase
{
    private final TableMetadata tableMetadata;

    public AggregationAccessorMinMaxByTable(boolean max, TableMetadata tableMetadata) {
        super(max);
        this.tableMetadata = tableMetadata;
    }

    public Object getValue(AggregationState state, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context) {
        EventBean event = getEnumerableEvent(state, eventsPerStream, isNewData, context);
        if (event == null) {
            return null;
        }
        return tableMetadata.getEventToPublic().convertToUnd(event, eventsPerStream, isNewData, context);
    }
}