/*
***************************************************************************************
* 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.EventBean;
import com.espertech.esper.client.EventPropertyGetter;
import com.espertech.esper.collection.MultiKeyUntyped;
import com.espertech.esper.util.JavaClassHelper;
import com.espertech.esper.util.SimpleNumberCoercer;
import java.util.Set;
/**
* 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.
* <p>
* Performs coercion of the index keys before storing the keys, and coercion of the lookup keys before lookup.
* <p>
* 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 PropertyIndexedEventTableCoerceAll extends PropertyIndexedEventTableCoerceAdd {
public PropertyIndexedEventTableCoerceAll(EventPropertyGetter[] propertyGetters, EventTableOrganization organization, SimpleNumberCoercer[] coercers, Class[] coercionType) {
super(propertyGetters, organization, coercers, coercionType);
}
/**
* Returns the set of events that have the same property value as the given event.
*
* @param keys to compare against
* @return set of events with property value, or null if none found (never returns zero-sized set)
*/
public Set<EventBean> lookup(Object[] keys) {
for (int i = 0; i < keys.length; i++) {
Class coercionType = coercionTypes[i];
Object key = keys[i];
if ((key != null) && (!key.getClass().equals(coercionType))) {
if (key instanceof Number) {
key = JavaClassHelper.coerceBoxed((Number) key, coercionTypes[i]);
keys[i] = key;
}
}
}
MultiKeyUntyped key = new MultiKeyUntyped(keys);
return propertyIndex.get(key);
}
}