Package com.espertech.esper.common.internal.event.bean.getter

Class DynamicPropertyGetterByFieldBase

java.lang.Object

com.espertech.esper.common.internal.event.bean.getter.DynamicPropertyGetterByFieldBase

All Implemented Interfaces:

EventPropertyGetter, EventPropertyValueGetter, BeanEventPropertyGetter, EventPropertyGetterSPI, EventPropertyValueGetterForge

Direct Known Subclasses:

DynamicIndexedPropertyGetterByField, DynamicMappedPropertyGetterByField, DynamicSimplePropertyGetterByField

public abstract class DynamicPropertyGetterByFieldBase
extends Object
implements BeanEventPropertyGetter

Base class for getters for a dynamic property (syntax field.inner?), caches methods to use for classes.

Field Summary

Fields

Modifier and Type	Field	Description
protected final BeanEventTypeFactory	beanEventTypeFactory
protected final CopyOnWriteArrayList<DynamicPropertyDescriptorByField>	cache
protected final EventBeanTypedEventFactory	eventBeanTypedEventFactory
protected final CodegenFieldSharable	sharableCode

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

EPTYPE, EPTYPEARRAY

Constructor Summary

Constructors

Constructor	Description
DynamicPropertyGetterByFieldBase(EventBeanTypedEventFactory eventBeanTypedEventFactory, BeanEventTypeFactory beanEventTypeFactory)

Method Summary

Modifier and Type	Method	Description
static Object	cacheAndCall(CopyOnWriteArrayList<DynamicPropertyDescriptorByField> cache, DynamicPropertyGetterByFieldBase getter, Object object, EventBeanTypedEventFactory eventBeanTypedEventFactory, BeanEventTypeFactory beanEventTypeFactory)	NOTE: Code-generation-invoked method, method name and parameter order matters
static boolean	cacheAndExists(CopyOnWriteArrayList<DynamicPropertyDescriptorByField> cache, DynamicPropertyGetterByFieldBase getter, Object object, EventBeanTypedEventFactory eventBeanTypedEventFactory)	NOTE: Code-generation-invoked method, method name and parameter order matters
protected CodegenExpression	cacheAndExistsCodegen(CodegenExpression underlyingExpression, CodegenMethodScope parent, CodegenClassScope codegenClassScope)
protected abstract Object	call(DynamicPropertyDescriptorByField descriptor, Object underlying)	Call the getter to obtains the return result object, or null if no such field exists.
protected abstract CodegenExpression	callCodegen(CodegenExpressionRef desc, CodegenExpressionRef object, CodegenMethodScope parent, CodegenClassScope codegenClassScope)
protected abstract Field	determineField(Class clazz)	To be implemented to return the field required, or null to indicate an appropriate field could not be found.
protected abstract CodegenExpression	determineFieldCodegen(CodegenExpressionRef clazz, CodegenMethodScope parent, CodegenClassScope codegenClassScope)
static DynamicPropertyDescriptorByField	dynamicPropertyCacheAdd(Class clazz, Field field, CopyOnWriteArrayList<DynamicPropertyDescriptorByField> cache)	NOTE: Code-generation-invoked method, method name and parameter order matters
static DynamicPropertyDescriptorByField	dynamicPropertyCacheCheck(CopyOnWriteArrayList<DynamicPropertyDescriptorByField> cache, Object obj)	NOTE: Code-generation-invoked method, method name and parameter order matters
CodegenExpression	eventBeanExistsCodegen(CodegenExpression beanExpression, CodegenMethodScope codegenMethodScope, CodegenClassScope codegenClassScope)
CodegenExpression	eventBeanFragmentCodegen(CodegenExpression beanExpression, CodegenMethodScope codegenMethodScope, CodegenClassScope codegenClassScope)
CodegenExpression	eventBeanGetCodegen(CodegenExpression beanExpression, CodegenMethodScope codegenMethodScope, CodegenClassScope codegenClassScope)
final Object	get(EventBean event)	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.
EPTypeClass	getBeanPropType()
Object	getFragment(EventBean eventBean)	Returns EventBean or array of EventBean for a property name or property expression.
protected static DynamicPropertyDescriptorByField	getPopulateCache(CopyOnWriteArrayList<DynamicPropertyDescriptorByField> cache, DynamicPropertyGetterByFieldBase dynamicPropertyGetterBase, Object obj, EventBeanTypedEventFactory eventBeanTypedEventFactory)
protected CodegenExpression	getPopulateCacheCodegen(CodegenExpression memberCache, CodegenExpressionRef object, CodegenMethodScope parent, CodegenClassScope codegenClassScope)
EPTypeClass	getTargetType()
static PropertyAccessException	handleException(DynamicPropertyDescriptorByField descriptor, Object underlying, Throwable t)	NOTE: Code-generation-invoked method, method name and parameter order matters
boolean	isBeanExistsProperty(Object object)	Returns true if the dynamic property exists.
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

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

isExistsProperty

Methods inherited from interface com.espertech.esper.common.internal.event.core.EventPropertyGetterSPI

underlyingExistsCodegen

Field Details

eventBeanTypedEventFactory

protected final EventBeanTypedEventFactory eventBeanTypedEventFactory

beanEventTypeFactory

protected final BeanEventTypeFactory beanEventTypeFactory

cache

protected final CopyOnWriteArrayList<DynamicPropertyDescriptorByField> cache

sharableCode

protected final CodegenFieldSharable sharableCode

Constructor Details

DynamicPropertyGetterByFieldBase

public DynamicPropertyGetterByFieldBase(EventBeanTypedEventFactory eventBeanTypedEventFactory,
 BeanEventTypeFactory beanEventTypeFactory)

Method Details

determineField

protected abstract Field determineField(Class clazz)

To be implemented to return the field required, or null to indicate an appropriate field could not be found.

Parameters:

clazz - to search for a matching field

Returns:

field if found, or null if no matching field exists

determineFieldCodegen

protected abstract CodegenExpression determineFieldCodegen(CodegenExpressionRef clazz,
 CodegenMethodScope parent,
 CodegenClassScope codegenClassScope)

call

protected abstract Object call(DynamicPropertyDescriptorByField descriptor,
 Object underlying)

Call the getter to obtains the return result object, or null if no such field exists.

Parameters:

descriptor - provides field information for the class

underlying - is the underlying object to ask for the property value

Returns:

underlying

callCodegen

protected abstract CodegenExpression callCodegen(CodegenExpressionRef desc,
 CodegenExpressionRef object,
 CodegenMethodScope parent,
 CodegenClassScope codegenClassScope)

cacheAndCall

public static Object cacheAndCall(CopyOnWriteArrayList<DynamicPropertyDescriptorByField> cache,
 DynamicPropertyGetterByFieldBase getter,
 Object object,
 EventBeanTypedEventFactory eventBeanTypedEventFactory,
 BeanEventTypeFactory beanEventTypeFactory)

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

Parameters:

cache - cache

getter - getter

object - object

eventBeanTypedEventFactory - event server

beanEventTypeFactory - bean factory

Returns:

property

cacheAndExists

public static boolean cacheAndExists(CopyOnWriteArrayList<DynamicPropertyDescriptorByField> cache,
 DynamicPropertyGetterByFieldBase getter,
 Object object,
 EventBeanTypedEventFactory eventBeanTypedEventFactory)

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

Parameters:

cache - cache

getter - getter

object - object

eventBeanTypedEventFactory - event server

Returns:

exists-flag

cacheAndExistsCodegen

protected CodegenExpression cacheAndExistsCodegen(CodegenExpression underlyingExpression,
 CodegenMethodScope parent,
 CodegenClassScope codegenClassScope)

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

getTargetType

public EPTypeClass getTargetType()

Specified by:

getTargetType in interface BeanEventPropertyGetter

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 event)
                 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:

event - 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

getBeanPropType

public EPTypeClass getBeanPropType()

Specified by:

getBeanPropType in interface BeanEventPropertyGetter

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

underlyingFragmentCodegen

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

Specified by:

underlyingFragmentCodegen in interface EventPropertyGetterSPI

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

getPopulateCache

protected static DynamicPropertyDescriptorByField getPopulateCache(CopyOnWriteArrayList<DynamicPropertyDescriptorByField> cache,
 DynamicPropertyGetterByFieldBase dynamicPropertyGetterBase,
 Object obj,
 EventBeanTypedEventFactory eventBeanTypedEventFactory)

getPopulateCacheCodegen

protected CodegenExpression getPopulateCacheCodegen(CodegenExpression memberCache,
 CodegenExpressionRef object,
 CodegenMethodScope parent,
 CodegenClassScope codegenClassScope)

dynamicPropertyCacheCheck

public static DynamicPropertyDescriptorByField dynamicPropertyCacheCheck(CopyOnWriteArrayList<DynamicPropertyDescriptorByField> cache,
 Object obj)

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

Parameters:

obj - target

cache - cache

Returns:

descriptor

dynamicPropertyCacheAdd

public static DynamicPropertyDescriptorByField dynamicPropertyCacheAdd(Class clazz,
 Field field,
 CopyOnWriteArrayList<DynamicPropertyDescriptorByField> cache)

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

Parameters:

clazz - class

field - field

cache - cache

Returns:

descriptor

handleException

public static PropertyAccessException handleException(DynamicPropertyDescriptorByField descriptor,
 Object underlying,
 Throwable t)

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

Parameters:

descriptor - descriptor

underlying - underlying

t - throwable

Returns:

exception