com.espertech.esper.event.EventBeanReaderDefaultImpl 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.event;

import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.EventPropertyGetter;
import com.espertech.esper.client.EventType;

import java.util.ArrayList;
import java.util.List;

/**
 * Reader implementation that utilizes event property getters and thereby works with all
 * event types regardsless of whether a type returns an event reader when asked for.
 */
public class EventBeanReaderDefaultImpl implements EventBeanReader {
    private EventPropertyGetter[] gettersArray;

    /**
     * Ctor.
     *
     * @param eventType the type of events to read
     */
    public EventBeanReaderDefaultImpl(EventType eventType) {
        String[] properties = eventType.getPropertyNames();
        List getters = new ArrayList();
        for (String property : properties) {
            EventPropertyGetter getter = eventType.getGetter(property);
            if (getter != null) {
                getters.add(getter);
            }
        }
        gettersArray = getters.toArray(new EventPropertyGetter[getters.size()]);
    }

    public Object[] read(EventBean theEvent) {
        Object[] values = new Object[gettersArray.length];
        for (int i = 0; i < gettersArray.length; i++) {
            values[i] = gettersArray[i].get(theEvent);
        }
        return values;
    }
}