com.espertech.esper.epl.core.engineimport

Class EngineImportUtil

java.lang.Object

com.espertech.esper.epl.core.engineimport.EngineImportUtil

public class EngineImportUtil
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
EngineImportUtil()

Method Summary

Modifier and Type	Method and Description
static java.lang.Object	getAnnotationHook(java.lang.annotation.Annotation[] annotations, HookType hookType, java.lang.Class interfaceExpected, EngineImportService engineImportService) Returns an instance of a hook as specified by an annotation.
static java.lang.Object	resolveIdentAsEnumConst(java.lang.String constant, EngineImportService engineImportService, boolean isAnnotation) Resolve a string constant as a possible enumeration value, returning null if not resolved.

Methods inherited from class java.lang.Object

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

Constructor Detail

EngineImportUtil

public EngineImportUtil()

Method Detail

resolveIdentAsEnumConst

public static java.lang.Object resolveIdentAsEnumConst(java.lang.String constant,
                                                       EngineImportService engineImportService,
                                                       boolean isAnnotation)
                                                throws ExprValidationException

Resolve a string constant as a possible enumeration value, returning null if not resolved.

Parameters:

constant - to resolve

engineImportService - for engine-level use to resolve enums, can be null

isAnnotation - whether we are in an annotation

Returns:

null or enumeration value

Throws:

ExprValidationException - if there is an error accessing the enum

getAnnotationHook

public static java.lang.Object getAnnotationHook(java.lang.annotation.Annotation[] annotations,
                                                 HookType hookType,
                                                 java.lang.Class interfaceExpected,
                                                 EngineImportService engineImportService)
                                          throws ExprValidationException

Returns an instance of a hook as specified by an annotation.

Parameters:

annotations - to search

hookType - type to look for

interfaceExpected - interface required

engineImportService - for resolving references

Returns:

hook instance

Throws:

ExprValidationException - if instantiation failed