com.espertech.esper.event.bean

Class KeyedMapFieldPropertyGetter

java.lang.Object

com.espertech.esper.event.bean.BaseNativePropertyGetter

com.espertech.esper.event.bean.KeyedMapFieldPropertyGetter

All Implemented Interfaces:

EventPropertyGetter, EventPropertyGetterMapped, BeanEventPropertyGetter, EventPropertyGetterAndMapped, EventPropertyGetterMappedSPI, EventPropertyGetterSPI

public class KeyedMapFieldPropertyGetter
extends BaseNativePropertyGetter
implements BeanEventPropertyGetter, EventPropertyGetterAndMapped

Getter for a key property identified by a given key value, using vanilla reflection.

Constructor Summary

Constructors

Constructor and Description
KeyedMapFieldPropertyGetter(Field field, Object key, EventAdapterService eventAdapterService) Constructor.

Method Summary

Modifier and Type	Method and Description
CodegenExpression	eventBeanExistsCodegen(CodegenExpression beanExpression, CodegenContext context)
CodegenExpression	eventBeanGetCodegen(CodegenExpression beanExpression, CodegenContext context)
CodegenExpression	eventBeanGetMappedCodegen(CodegenContext context, CodegenExpression beanExpression, CodegenExpression key)
Object	get(EventBean obj) Return the value for the property in the event object specified when the instance was obtained.
Object	get(EventBean eventBean, String mapKey) Return the value for the property in the event object specified when the instance was obtained.
Object	getBeanProp(Object object) Returns the property as an object.
Object	getBeanPropInternal(Object object, Object key)
Class	getBeanPropType()
Class	getTargetType()
boolean	isBeanExistsProperty(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.
String	toString()
CodegenExpression	underlyingExistsCodegen(CodegenExpression underlyingExpression, CodegenContext context)
CodegenExpression	underlyingGetCodegen(CodegenExpression underlyingExpression, CodegenContext context)

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

eventBeanFragmentCodegen, getFragment, getFragmentDynamic, toFragmentArray, toFragmentIterable, underlyingFragmentCodegen

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.event.EventPropertyGetterSPI

eventBeanFragmentCodegen, underlyingFragmentCodegen

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

getFragment

Constructor Detail

KeyedMapFieldPropertyGetter

public KeyedMapFieldPropertyGetter(Field field,
                                   Object key,
                                   EventAdapterService eventAdapterService)

Constructor.

Parameters:

field - is the field to use to retrieve a value from the object.

key - is the key to supply as parameter to the mapped property getter

eventAdapterService - factory for event beans and event types

Method Detail

get

public Object get(EventBean eventBean,
                  String mapKey)
           throws PropertyAccessException

Description copied from interface: EventPropertyGetterMapped

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 EventPropertyGetterMapped

Parameters:

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

mapKey - the map key value

Returns:

value of property in event

Throws:

PropertyAccessException - to indicate that property access failed

getBeanProp

public Object getBeanProp(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

getBeanPropInternal

public Object getBeanPropInternal(Object object,
                                  Object key)
                           throws PropertyAccessException

Throws:

PropertyAccessException

isBeanExistsProperty

public boolean isBeanExistsProperty(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 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 String toString()

Overrides:

toString in class 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

getBeanPropType

public Class getBeanPropType()

Specified by:

getBeanPropType in interface BeanEventPropertyGetter

Specified by:

getBeanPropType in class BaseNativePropertyGetter

getTargetType

public Class getTargetType()

Specified by:

getTargetType in interface BeanEventPropertyGetter

Specified by:

getTargetType in class BaseNativePropertyGetter

eventBeanGetCodegen

public CodegenExpression eventBeanGetCodegen(CodegenExpression beanExpression,
                                             CodegenContext context)

Specified by:

eventBeanGetCodegen in interface EventPropertyGetterSPI

eventBeanExistsCodegen

public CodegenExpression eventBeanExistsCodegen(CodegenExpression beanExpression,
                                                CodegenContext context)

Specified by:

eventBeanExistsCodegen in interface EventPropertyGetterSPI

underlyingGetCodegen

public CodegenExpression underlyingGetCodegen(CodegenExpression underlyingExpression,
                                              CodegenContext context)

Specified by:

underlyingGetCodegen in interface EventPropertyGetterSPI

underlyingExistsCodegen

public CodegenExpression underlyingExistsCodegen(CodegenExpression underlyingExpression,
                                                 CodegenContext context)

Specified by:

underlyingExistsCodegen in interface EventPropertyGetterSPI

eventBeanGetMappedCodegen

public CodegenExpression eventBeanGetMappedCodegen(CodegenContext context,
                                                   CodegenExpression beanExpression,
                                                   CodegenExpression key)

Specified by:

eventBeanGetMappedCodegen in interface EventPropertyGetterMappedSPI