com.espertech.esper.epl.join.table.PropertyIndexedEventTableCoerceAllFactory Maven / Gradle / Ivy

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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.table;

import com.espertech.esper.client.EventType;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;

/**
 * Index that organizes events by the event property values into hash buckets. Based on a HashMap
 * with {@link com.espertech.esper.collection.MultiKeyUntyped} keys that store the property values.
 * 
 * Performs coercion of the index keys before storing the keys, and coercion of the lookup keys before lookup.
 * 
 * Takes a list of property names as parameter. Doesn't care which event type the events have as long as the properties
 * exist. If the same event is added twice, the class throws an exception on add.
 */
public class PropertyIndexedEventTableCoerceAllFactory extends PropertyIndexedEventTableCoerceAddFactory {
    /**
     * Ctor.
     *
     * @param streamNum     is the stream number of the indexed stream
     * @param eventType     is the event type of the indexed stream
     * @param propertyNames are the property names to get property values
     * @param coercionType  are the classes to coerce indexed values to
     */
    public PropertyIndexedEventTableCoerceAllFactory(int streamNum, EventType eventType, String[] propertyNames, Class[] coercionType) {
        super(streamNum, eventType, propertyNames, coercionType);
    }

    public EventTable[] makeEventTables(EventTableFactoryTableIdent tableIdent, ExprEvaluatorContext exprEvaluatorContext) {
        EventTableOrganization organization = getOrganization();
        return new EventTable[]{new PropertyIndexedEventTableCoerceAll(propertyGetters, organization, coercers, coercionType)};
    }

    protected EventTableOrganization getOrganization() {
        return new EventTableOrganization(optionalIndexName, unique, true, streamNum, propertyNames, EventTableOrganizationType.HASH);
    }
}