package com.espertech.esper.event.map;
import com.espertech.esper.client.EventPropertyGetter;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.PropertyAccessException;
import com.espertech.esper.client.EventType;
import com.espertech.esper.event.EventAdapterService;
import java.util.Map;
/**
* Getter for retrieving a value from a map.
*/
public class MapMaptypedUndPropertyGetter implements MapEventPropertyGetter
{
private final String propertyName;
private final EventAdapterService eventAdapterService;
private final EventType fragmentType;
/**
* Ctor.
* @param propertyNameAtomic property name
* @param eventAdapterService factory for event beans and event types
* @param fragmentType type of the entry returned
*/
public MapMaptypedUndPropertyGetter(String propertyNameAtomic, EventAdapterService eventAdapterService, EventType fragmentType)
{
propertyName = propertyNameAtomic;
this.fragmentType = fragmentType;
this.eventAdapterService = eventAdapterService;
}
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
{
Object underlying = obj.getUnderlying();
// The underlying is expected to be a map
if (!(underlying instanceof Map))
{
throw new PropertyAccessException("Mismatched property getter to event bean type, " +
"the underlying data object is not of type java.lang.Map");
}
Map map = (Map) underlying;
return map.get(propertyName);
}
public boolean isExistsProperty(EventBean eventBean)
{
return true;
}
public Object getFragment(EventBean obj) throws PropertyAccessException
{
Map<String, Object> value = (Map<String, Object>) get(obj);
if (value == null)
{
return null;
}
return eventAdapterService.adaptorForTypedMap(value, fragmentType);
}
}