/**************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* 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.map;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.PropertyAccessException;
import com.espertech.esper.event.BaseNestableEventUtil;
import com.espertech.esper.event.EventAdapterService;
import com.espertech.esper.event.bean.BeanEventType;
import java.util.Map;
/**
* A getter for use with Map-based events simply returns the value for the key.
*/
public class MapEntryPropertyGetter implements MapEventPropertyGetter
{
private final String propertyName;
private final EventAdapterService eventAdapterService;
private final BeanEventType eventType;
/**
* Ctor.
* @param propertyName property to get
* @param eventAdapterService factory for event beans and event types
* @param eventType type of the entry returned
*/
public MapEntryPropertyGetter(String propertyName, BeanEventType eventType, EventAdapterService eventAdapterService) {
this.propertyName = propertyName;
this.eventAdapterService = eventAdapterService;
this.eventType = eventType;
}
public Object getMap(Map<String, Object> map) throws PropertyAccessException
{
// If the map does not contain the key, this is allowed and represented as null
return map.get(propertyName);
}
public boolean isMapExistsProperty(Map<String, Object> map)
{
return true; // Property exists as the property is not dynamic (unchecked)
}
public Object get(EventBean obj)
{
return getMap(BaseNestableEventUtil.checkedCastUnderlyingMap(obj));
}
public boolean isExistsProperty(EventBean eventBean)
{
return true; // Property exists as the property is not dynamic (unchecked)
}
public Object getFragment(EventBean eventBean)
{
if (eventType == null)
{
return null;
}
Object result = get(eventBean);
return BaseNestableEventUtil.getFragmentPojo(result, eventType, eventAdapterService);
}
}