/*
 * *************************************************************************************
 *  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.EventType;
import com.espertech.esper.client.PropertyAccessException;
import com.espertech.esper.event.BaseNestableEventUtil;
import com.espertech.esper.event.EventAdapterService;

import java.util.Map;

/**
 * Getter for map entry.
 */
public abstract class MapPropertyGetterDefaultBase implements MapEventPropertyGetter
{
    private final String propertyName;
    protected final EventType fragmentEventType;
    protected final EventAdapterService eventAdapterService;

    /**
     * Ctor.
     * @param propertyNameAtomic property name
     * @param fragmentEventType fragment type
     * @param eventAdapterService factory for event beans and event types
     */
    public MapPropertyGetterDefaultBase(String propertyNameAtomic, EventType fragmentEventType, EventAdapterService eventAdapterService)
    {
        this.propertyName = propertyNameAtomic;
        this.fragmentEventType = fragmentEventType;
        this.eventAdapterService = eventAdapterService;
    }

    protected abstract Object handleCreateFragment(Object value);

    public Object getMap(Map<String, Object> map) throws PropertyAccessException
    {
        return map.get(propertyName);
    }

    public boolean isMapExistsProperty(Map<String, Object> map)
    {
        return true;
    }

    public Object get(EventBean obj) throws PropertyAccessException
    {
        return getMap(BaseNestableEventUtil.checkedCastUnderlyingMap(obj));
    }

    public boolean isExistsProperty(EventBean eventBean)
    {
        return true;
    }

    public Object getFragment(EventBean eventBean) throws PropertyAccessException
    {
        Object value = get(eventBean);
        return handleCreateFragment(value);
    }
}