/*
***************************************************************************************
* 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.bean;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.PropertyAccessException;
import com.espertech.esper.event.EventAdapterService;
import com.espertech.esper.event.EventPropertyGetterAndIndexed;
import com.espertech.esper.event.vaevent.PropertyUtility;
import net.sf.cglib.reflect.FastMethod;
import java.lang.reflect.Array;
import java.lang.reflect.InvocationTargetException;
/**
* Getter for an array property identified by a given index, using the CGLIB fast method.
*/
public class ArrayFastPropertyGetter extends BaseNativePropertyGetter implements BeanEventPropertyGetter, EventPropertyGetterAndIndexed {
private final FastMethod fastMethod;
private final int index;
/**
* Constructor.
*
* @param fastMethod is the method to use to retrieve a value from the object
* @param index is tge index within the array to get the property from
* @param eventAdapterService factory for event beans and event types
*/
public ArrayFastPropertyGetter(FastMethod fastMethod, int index, EventAdapterService eventAdapterService) {
super(eventAdapterService, fastMethod.getReturnType().getComponentType(), null);
this.index = index;
this.fastMethod = fastMethod;
if (index < 0) {
throw new IllegalArgumentException("Invalid negative index value");
}
}
public Object getBeanProp(Object object) throws PropertyAccessException {
return getBeanPropInternal(object, index);
}
private Object getBeanPropInternal(Object object, int index) throws PropertyAccessException {
try {
Object value = fastMethod.invoke(object, null);
if (Array.getLength(value) <= index) {
return null;
}
return Array.get(value, index);
} catch (ClassCastException e) {
throw PropertyUtility.getMismatchException(fastMethod.getJavaMethod(), object, e);
} catch (InvocationTargetException e) {
throw PropertyUtility.getInvocationTargetException(fastMethod.getJavaMethod(), e);
}
}
public boolean isBeanExistsProperty(Object object) {
return true; // Property exists as the property is not dynamic (unchecked)
}
public final Object get(EventBean obj) throws PropertyAccessException {
return getBeanProp(obj.getUnderlying());
}
public Object get(EventBean eventBean, int index) throws PropertyAccessException {
return getBeanPropInternal(eventBean.getUnderlying(), index);
}
public String toString() {
return "ArrayFastPropertyGetter " +
" fastMethod=" + fastMethod.toString() +
" index=" + index;
}
public boolean isExistsProperty(EventBean eventBean) {
return true; // Property exists as the property is not dynamic (unchecked)
}
}