/*
***************************************************************************************
* 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.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.BaseNativePropertyGetter;
import java.util.Map;
/**
* A getter that works on arrays residing within a Map as an event property.
*/
public class MapArrayPOJOEntryIndexedPropertyGetter extends BaseNativePropertyGetter implements MapEventPropertyGetter, MapEventPropertyGetterAndIndexed {
private final String propertyMap;
private final int index;
/**
* Ctor.
*
* @param propertyMap the property to use for the map lookup
* @param index the index to fetch the array element for
* @param eventAdapterService factory for event beans and event types
* @param returnType type of the entry returned
*/
public MapArrayPOJOEntryIndexedPropertyGetter(String propertyMap, int index, EventAdapterService eventAdapterService, Class returnType) {
super(eventAdapterService, returnType, null);
this.propertyMap = propertyMap;
this.index = index;
}
public Object getMap(Map<String, Object> map) throws PropertyAccessException {
return getMapInternal(map, index);
}
public Object getMapInternal(Map<String, Object> map, int index) throws PropertyAccessException {
// If the map does not contain the key, this is allowed and represented as null
Object value = map.get(propertyMap);
return BaseNestableEventUtil.getIndexedValue(value, index);
}
public boolean isMapExistsProperty(Map<String, Object> map) {
return map.containsKey(propertyMap);
}
public Object get(EventBean eventBean, int index) throws PropertyAccessException {
Map<String, Object> map = BaseNestableEventUtil.checkedCastUnderlyingMap(eventBean);
return getMapInternal(map, index);
}
public Object get(EventBean obj) {
return getMap(BaseNestableEventUtil.checkedCastUnderlyingMap(obj));
}
public boolean isExistsProperty(EventBean eventBean) {
Map map = BaseNestableEventUtil.checkedCastUnderlyingMap(eventBean);
return map.containsKey(propertyMap);
}
}