/**************************************************************************************
* 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.bean;
import com.asper.sources.net.sf.cglib.reflect.FastMethod;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.PropertyAccessException;
import com.espertech.esper.event.EventAdapterService;
import com.espertech.esper.event.EventPropertyGetterAndMapped;
import com.espertech.esper.event.vaevent.PropertyUtility;
import com.espertech.esper.util.JavaClassHelper;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;
/**
* Getter for a key property identified by a given key value of a map, using the CGLIB fast method.
*/
public class KeyedMapFastPropertyGetter extends BaseNativePropertyGetter implements BeanEventPropertyGetter, EventPropertyGetterAndMapped
{
private final FastMethod fastMethod;
private final Object key;
/**
* Constructor.
* @param method the underlying method
* @param fastMethod is the method to use to retrieve a value from the object.
* @param key is the key to supply as parameter to the mapped property getter
* @param eventAdapterService factory for event beans and event types
*/
public KeyedMapFastPropertyGetter(Method method, FastMethod fastMethod, Object key, EventAdapterService eventAdapterService)
{
super(eventAdapterService, JavaClassHelper.getGenericReturnTypeMap(method, false), null);
this.key = key;
this.fastMethod = fastMethod;
}
public boolean isBeanExistsProperty(Object object)
{
return true; // Property exists as the property is not dynamic (unchecked)
}
public Object getBeanProp(Object object) throws PropertyAccessException {
return getBeanPropInternal(object, key);
}
public Object get(EventBean eventBean, String mapKey) throws PropertyAccessException {
return getBeanPropInternal(eventBean.getUnderlying(), mapKey);
}
public Object getBeanPropInternal(Object object, Object key) throws PropertyAccessException
{
try
{
Object result = fastMethod.invoke(object, null);
if (!(result instanceof Map)) {
return null;
}
Map resultMap = (Map) result;
return resultMap.get(key);
}
catch (ClassCastException e)
{
throw PropertyUtility.getMismatchException(fastMethod.getJavaMethod(), object, e);
}
catch (InvocationTargetException e)
{
throw PropertyUtility.getInvocationTargetException(fastMethod.getJavaMethod(), e);
}
}
public final Object get(EventBean obj) throws PropertyAccessException
{
Object underlying = obj.getUnderlying();
return getBeanProp(underlying);
}
public String toString()
{
return "KeyedMapFastPropertyGetter " +
" fastMethod=" + fastMethod.toString() +
" key=" + key;
}
public boolean isExistsProperty(EventBean eventBean)
{
return true; // Property exists as the property is not dynamic (unchecked)
}
}