com.espertech.esper.event.arr

Class ObjectArrayPOJOEntryPropertyGetter

java.lang.Object

com.espertech.esper.event.bean.BaseNativePropertyGetter

com.espertech.esper.event.arr.ObjectArrayPOJOEntryPropertyGetter

All Implemented Interfaces:

EventPropertyGetter, ObjectArrayEventPropertyGetter

public class ObjectArrayPOJOEntryPropertyGetter
extends BaseNativePropertyGetter
implements ObjectArrayEventPropertyGetter

A getter that works on POJO events residing within a Map as an event property.

Constructor Summary

Constructors

Constructor and Description
ObjectArrayPOJOEntryPropertyGetter(int propertyIndex, BeanEventPropertyGetter entryGetter, EventAdapterService eventAdapterService, Class returnType, Class nestedComponentType) Ctor.

Method Summary

Modifier and Type	Method and Description
Object	get(EventBean obj) Return the value for the property in the event object specified when the instance was obtained.
Object	getObjectArray(Object[] array) Returns a property of an event.
boolean	isExistsProperty(EventBean eventBean) Returns true if the property exists, or false if the type does not have such a property.
boolean	isObjectArrayExistsProperty(Object[] array) Exists-function for properties in a object array-type event.

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, toString, wait, wait, wait

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

getFragment

Constructor Detail

ObjectArrayPOJOEntryPropertyGetter

public ObjectArrayPOJOEntryPropertyGetter(int propertyIndex,
                                          BeanEventPropertyGetter entryGetter,
                                          EventAdapterService eventAdapterService,
                                          Class returnType,
                                          Class nestedComponentType)

Ctor.

Parameters:

entryGetter - the getter for the map entry

eventAdapterService - for producing wrappers to objects

returnType - type of the entry returned

propertyIndex - index

nestedComponentType - nested component type

Method Detail

getObjectArray

public Object getObjectArray(Object[] array)
                      throws PropertyAccessException

Description copied from interface: ObjectArrayEventPropertyGetter

Returns a property of an event.

Specified by:

getObjectArray in interface ObjectArrayEventPropertyGetter

Parameters:

array - to interrogate

Returns:

property value

Throws:

PropertyAccessException - for property access errors

isObjectArrayExistsProperty

public boolean isObjectArrayExistsProperty(Object[] array)

Description copied from interface: ObjectArrayEventPropertyGetter

Exists-function for properties in a object array-type event.

Specified by:

isObjectArrayExistsProperty in interface ObjectArrayEventPropertyGetter

Parameters:

array - to interrogate

Returns:

indicator

get

public Object get(EventBean obj)

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

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