com.espertech.esper.epl.lookup.SubordIndexedTableLookupStrategySingleCoercing 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) 2006-2015 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.lookup;

import com.espertech.esper.client.EventBean;
import com.espertech.esper.epl.expression.core.ExprEvaluator;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
import com.espertech.esper.epl.join.table.PropertyIndexedEventTableSingle;
import com.espertech.esper.event.EventBeanUtility;

/**
 * Index lookup strategy that coerces the key values before performing a lookup.
 */
public class SubordIndexedTableLookupStrategySingleCoercing extends SubordIndexedTableLookupStrategySingleExpr
{
    private Class coercionType;

    public SubordIndexedTableLookupStrategySingleCoercing(int streamCountOuter, ExprEvaluator evaluator, PropertyIndexedEventTableSingle index, Class coercionType, LookupStrategyDesc strategyDesc) {
        super(streamCountOuter, evaluator, index, strategyDesc);
        this.coercionType = coercionType;
    }

    @Override
    protected Object getKey(EventBean[] eventsPerStream, ExprEvaluatorContext context) {
        Object key = super.getKey(eventsPerStream, context);
        return EventBeanUtility.coerce(key, coercionType);
    }
}