com.espertech.esper.event.bean
Class ReflectionPropMethodGetter

java.lang.Object
  com.espertech.esper.event.bean.BaseNativePropertyGetter
      com.espertech.esper.event.bean.ReflectionPropMethodGetter

All Implemented Interfaces:

EventPropertyGetter, BeanEventPropertyGetter

public final class ReflectionPropMethodGetter
extends BaseNativePropertyGetter
implements BeanEventPropertyGetter

Property getter for methods using Java's vanilla reflection.

Constructor Summary

ReflectionPropMethodGetter(java.lang.reflect.Method method, EventAdapterService eventAdapterService)
Constructor.

Method Summary

java.lang.Object	get(EventBean obj) Return the value for the property in the event object specified when the instance was obtained.
java.lang.Object	getBeanProp(java.lang.Object object) Returns the property as an object.
boolean	isBeanExistsProperty(java.lang.Object object) Returns true if the dynamic property exists.
boolean	isExistsProperty(EventBean eventBean) Returns true if the property exists, or false if the type does not have such a property.
java.lang.String	toString()

Methods inherited from class com.espertech.esper.event.bean.BaseNativePropertyGetter

getFragment, getFragmentDynamic

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.espertech.esper.client.EventPropertyGetter

getFragment

Constructor Detail

ReflectionPropMethodGetter

public ReflectionPropMethodGetter(java.lang.reflect.Method method,
                                  EventAdapterService eventAdapterService)

Constructor.

Parameters:

method - is the regular reflection method to use to obtain values for a field.

eventAdapterService - factory for event beans and event types

Method Detail

getBeanProp

public java.lang.Object getBeanProp(java.lang.Object object)
                             throws PropertyAccessException

Description copied from interface: BeanEventPropertyGetter

Returns the property as an object.

Specified by:

getBeanProp in interface BeanEventPropertyGetter

Parameters:

object - to evaluate

Returns:

property of object

Throws:

PropertyAccessException - if access failed

isBeanExistsProperty

public boolean isBeanExistsProperty(java.lang.Object object)

Description copied from interface: BeanEventPropertyGetter

Returns true if the dynamic property exists.

Specified by:

isBeanExistsProperty in interface BeanEventPropertyGetter

Parameters:

object - to evaluate

Returns:

indicator if property exists

get

public final java.lang.Object get(EventBean obj)
                           throws PropertyAccessException

Description copied from interface: EventPropertyGetter

Return the value for the property in the event object specified when the instance was obtained. Useful for fast access to event properties. Throws a PropertyAccessException if the getter instance doesn't match the EventType it was obtained from, and to indicate other property access problems.

Specified by:

get in interface EventPropertyGetter

Parameters:

obj - is the event to get the value of a property from

Returns:

value of property in event

Throws:

PropertyAccessException - to indicate that property access failed

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

isExistsProperty

public boolean isExistsProperty(EventBean eventBean)

Description copied from interface: EventPropertyGetter

Returns true if the property exists, or false if the type does not have such a property.

Useful for dynamic properties of the syntax "property?" and the dynamic nested/indexed/mapped versions. Dynamic nested properties follow the syntax "property?.nested" which is equivalent to "property?.nested?". If any of the properties in the path of a dynamic nested property return null, the dynamic nested property does not exists and the method returns false.

For non-dynamic properties, this method always returns true since a getter would not be available unless

Specified by:

isExistsProperty in interface EventPropertyGetter

Parameters:

eventBean - is the event to check if the dynamic property exists

Returns:

indictor whether the property exists, always true for non-dynamic (default) properties