Package com.espertech.esper.common.internal.event.map

Class MapMappedPropertyGetter

java.lang.Object

com.espertech.esper.common.internal.event.map.MapMappedPropertyGetter

All Implemented Interfaces:

EventPropertyGetter, EventPropertyGetterMapped, EventPropertyValueGetter, EventPropertyGetterMappedSPI, EventPropertyGetterSPI, EventPropertyValueGetterForge, MapEventPropertyGetter, MapEventPropertyGetterAndMapped

public class MapMappedPropertyGetter
extends Object
implements MapEventPropertyGetter, MapEventPropertyGetterAndMapped

Getter for a dynamic mappeds property for maps.

Field Summary

Fields inherited from interface com.espertech.esper.common.client.EventPropertyValueGetter

EPTYPE, EPTYPEARRAY

Constructor Summary

Constructors

Constructor	Description
MapMappedPropertyGetter(String fieldName, String key)	Ctor.

Method Summary

Modifier and Type	Method	Description
CodegenExpression	eventBeanExistsCodegen(CodegenExpression beanExpression, CodegenMethodScope codegenMethodScope, CodegenClassScope codegenClassScope)
CodegenExpression	eventBeanFragmentCodegen(CodegenExpression beanExpression, CodegenMethodScope codegenMethodScope, CodegenClassScope codegenClassScope)
CodegenExpression	eventBeanGetCodegen(CodegenExpression beanExpression, CodegenMethodScope codegenMethodScope, CodegenClassScope codegenClassScope)
CodegenExpression	eventBeanGetMappedCodegen(CodegenMethodScope codegenMethodScope, CodegenClassScope codegenClassScope, CodegenExpression beanExpression, CodegenExpression key)
Object	get(EventBean eventBean)	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	getFragment(EventBean eventBean)	Returns EventBean or array of EventBean for a property name or property expression.
Object	getMap(Map<String,Object> map)	Returns a property of an event.
static Object	getMapMappedValue(Map<String,Object> map, String fieldName, String providedKey)	NOTE: Code-generation-invoked method, method name and parameter order matters
boolean	isExistsProperty(EventBean eventBean)	Returns true if the property exists, or false if the type does not have such a property.
boolean	isMapExistsProperty(Map<String,Object> map)	Exists-function for properties in a map-type event.
static boolean	isMapExistsProperty(Map<String,Object> map, String fieldName, String key)	NOTE: Code-generation-invoked method, method name and parameter order matters
CodegenExpression	underlyingExistsCodegen(CodegenExpression underlyingExpression, CodegenMethodScope codegenMethodScope, CodegenClassScope codegenClassScope)
CodegenExpression	underlyingFragmentCodegen(CodegenExpression underlyingExpression, CodegenMethodScope codegenMethodScope, CodegenClassScope codegenClassScope)
CodegenExpression	underlyingGetCodegen(CodegenExpression underlyingExpression, CodegenMethodScope codegenMethodScope, CodegenClassScope codegenClassScope)

Methods inherited from class java.lang.Object

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

Constructor Details

MapMappedPropertyGetter

public MapMappedPropertyGetter(String fieldName,
 String key)

Ctor.

Parameters:

fieldName - property name

key - get the element at

Method Details

getMapMappedValue

public static Object getMapMappedValue(Map<String,Object> map,
 String fieldName,
 String providedKey)
                                throws PropertyAccessException

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

map - map

fieldName - field

providedKey - key

Returns:

value

Throws:

PropertyAccessException - exception

isMapExistsProperty

public static boolean isMapExistsProperty(Map<String,Object> map,
 String fieldName,
 String key)

NOTE: Code-generation-invoked method, method name and parameter order matters

Parameters:

map - map

fieldName - field

key - key

Returns:

value

Throws:

PropertyAccessException - exception

getMap

public Object getMap(Map<String,Object> map)
              throws PropertyAccessException

Description copied from interface: MapEventPropertyGetter

Returns a property of an event.

Specified by:

getMap in interface MapEventPropertyGetter

Parameters:

map - to interrogate

Returns:

property value

Throws:

PropertyAccessException - for property access errors

isMapExistsProperty

public boolean isMapExistsProperty(Map<String,Object> map)

Description copied from interface: MapEventPropertyGetter

Exists-function for properties in a map-type event.

Specified by:

isMapExistsProperty in interface MapEventPropertyGetter

Parameters:

map - to interrogate

Returns:

indicator

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

get

public Object get(EventBean eventBean)
           throws PropertyAccessException

Description copied from interface: EventPropertyValueGetter

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 EventPropertyValueGetter

Parameters:

eventBean - 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

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

getFragment

public Object getFragment(EventBean eventBean)

Description copied from interface: EventPropertyGetter

Returns EventBean or array of EventBean for a property name or property expression.

For use with properties whose value is itself an event or whose value can be represented as an event by the underlying event representation.

The EventType of the EventBean instance(s) returned by this method can be determined by EventType.getFragmentType(String). Use EventPropertyDescriptor to obtain a list of properties that return fragments from an event type.

Returns null if the property value is null or the property value cannot be represented as a fragment by the underlying representation.

Specified by:

getFragment in interface EventPropertyGetter

Parameters:

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

Returns:

the value of a property as an EventBean or array of EventBean

eventBeanGetCodegen

public CodegenExpression eventBeanGetCodegen(CodegenExpression beanExpression,
 CodegenMethodScope codegenMethodScope,
 CodegenClassScope codegenClassScope)

Specified by:

eventBeanGetCodegen in interface EventPropertyValueGetterForge

eventBeanExistsCodegen

public CodegenExpression eventBeanExistsCodegen(CodegenExpression beanExpression,
 CodegenMethodScope codegenMethodScope,
 CodegenClassScope codegenClassScope)

Specified by:

eventBeanExistsCodegen in interface EventPropertyGetterSPI

eventBeanFragmentCodegen

public CodegenExpression eventBeanFragmentCodegen(CodegenExpression beanExpression,
 CodegenMethodScope codegenMethodScope,
 CodegenClassScope codegenClassScope)

Specified by:

eventBeanFragmentCodegen in interface EventPropertyGetterSPI

underlyingGetCodegen

public CodegenExpression underlyingGetCodegen(CodegenExpression underlyingExpression,
 CodegenMethodScope codegenMethodScope,
 CodegenClassScope codegenClassScope)

Specified by:

underlyingGetCodegen in interface EventPropertyGetterSPI

underlyingExistsCodegen

public CodegenExpression underlyingExistsCodegen(CodegenExpression underlyingExpression,
 CodegenMethodScope codegenMethodScope,
 CodegenClassScope codegenClassScope)

Specified by:

underlyingExistsCodegen in interface EventPropertyGetterSPI

underlyingFragmentCodegen

public CodegenExpression underlyingFragmentCodegen(CodegenExpression underlyingExpression,
 CodegenMethodScope codegenMethodScope,
 CodegenClassScope codegenClassScope)

Specified by:

underlyingFragmentCodegen in interface EventPropertyGetterSPI

eventBeanGetMappedCodegen

public CodegenExpression eventBeanGetMappedCodegen(CodegenMethodScope codegenMethodScope,
 CodegenClassScope codegenClassScope,
 CodegenExpression beanExpression,
 CodegenExpression key)

Specified by:

eventBeanGetMappedCodegen in interface EventPropertyGetterMappedSPI