com.espertech.esper.event.bean.BeanEventPropertyWriter 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.event.bean;

import com.espertech.esper.client.EventBean;
import com.espertech.esper.event.EventPropertyWriter;
import net.sf.cglib.reflect.FastMethod;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.lang.reflect.InvocationTargetException;

/**
 * Writer for a property to an event.
 */
public class BeanEventPropertyWriter implements EventPropertyWriter
{
    private static final Log log = LogFactory.getLog(BeanEventPropertyWriter.class);

    private final Class clazz;
    private final FastMethod writerMethod;

    /**
     * Ctor.
     * @param clazz to write to
     * @param writerMethod write method 
     */
    public BeanEventPropertyWriter(Class clazz, FastMethod writerMethod)
    {
        this.clazz = clazz;
        this.writerMethod = writerMethod;
    }

    public void write(Object value, EventBean target)
    {
        invoke(new Object[] {value}, target.getUnderlying());
    }

    public void writeValue(Object value, Object target)
    {
        invoke(new Object[] {value}, target);
    }

    protected void invoke(Object[] values, Object target) {
        try
        {
            writerMethod.invoke(target, values);
        }
        catch (InvocationTargetException e)
        {
            String message = "Unexpected exception encountered invoking setter-method '" + writerMethod.getJavaMethod() + "' on class '" +
                    clazz.getName() + "' : " + e.getTargetException().getMessage();
            log.error(message, e);
        }
    }
}