/*
***************************************************************************************
* 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 java.util.Map;
/**
* A getter that interrogates a given property in a map which may itself contain nested maps or indexed entries.
*/
public class MapMapPropertyGetter implements MapEventPropertyGetter {
private final String propertyMap;
private final MapEventPropertyGetter getter;
/**
* Ctor.
*
* @param propertyMap is the property returning the map to interrogate
* @param getter is the getter to use to interrogate the property in the map
*/
public MapMapPropertyGetter(String propertyMap, MapEventPropertyGetter getter) {
if (getter == null) {
throw new IllegalArgumentException("Getter is a required parameter");
}
this.propertyMap = propertyMap;
this.getter = getter;
}
public Object getMap(Map<String, Object> map) throws PropertyAccessException {
Object valueTopObj = map.get(propertyMap);
if (!(valueTopObj instanceof Map)) {
return null;
}
return getter.getMap((Map) valueTopObj);
}
public boolean isMapExistsProperty(Map<String, Object> map) {
Object valueTopObj = map.get(propertyMap);
if (!(valueTopObj instanceof Map)) {
return false;
}
return getter.isMapExistsProperty((Map) valueTopObj);
}
public Object get(EventBean eventBean) throws PropertyAccessException {
return getMap(BaseNestableEventUtil.checkedCastUnderlyingMap(eventBean));
}
public boolean isExistsProperty(EventBean eventBean) {
return isMapExistsProperty(BaseNestableEventUtil.checkedCastUnderlyingMap(eventBean));
}
public Object getFragment(EventBean eventBean) {
return null;
}
}