org.openl.rules.types

Class OpenMethodDispatcher

java.lang.Object

org.openl.rules.types.OpenMethodDispatcher

All Implemented Interfaces:

INamedThing, IMethodCaller, Invokable, IOpenMember, IOpenMethod, IOpenMethodHeader

Direct Known Subclasses:

MatchingOpenMethodDispatcher

public abstract class OpenMethodDispatcher
extends Object
implements IOpenMethod

Class that decorates the IOpenMehtod interface for method overload support.

Author:

Alexey Gamanovich

Field Summary

Fields inherited from interface org.openl.base.INamedThing

EMPTY, LONG, REGULAR, SHORT

Constructor Summary

Constructors

Constructor and Description
OpenMethodDispatcher()

Method Summary

Modifier and Type	Method and Description
void	addMethod(IOpenMethod candidate) Try to add method as overloaded version of decorated method.
protected void	decorate(IOpenMethod delegate) Creates new instance of decorator.
IOpenMethod	findMatchingMethod(IRuntimeEnv env) Finds appropriate method using runtime context.
protected abstract IOpenMethod	findMatchingMethod(List<IOpenMethod> candidates, IRuntimeContext context) Resolve best matching method to invoke.
List<IOpenMethod>	getCandidates()
IOpenClass	getDeclaringClass() Gets the declaring class.
abstract TableSyntaxNode	getDispatcherTable()
String	getDisplayName(int mode) Gets the user-friendly name.
IMemberMetaInfo	getInfo() Gets null.
IOpenMethod	getMethod() Gets this.
String	getName() Gets the method name.
IMethodSignature	getSignature() Gets the signature of method.
IOpenMethod	getTargetMethod()
IOpenClass	getType() Gets the type of method.
Object	invoke(Object target, Object[] params, IRuntimeEnv env) Invokes appropriate method using runtime context.
protected Object	invokeInner(Object target, Object[] params, IRuntimeEnv env) Invokes appropriate method using runtime context.
boolean	isConstructor()
boolean	isStatic()
protected IOpenMethod	useActiveOrNewerVersion(IOpenMethod existedMethod, IOpenMethod newMethod, MethodKey key) In case we have several versions of one table we should add only the newest or active version of table.

Methods inherited from class java.lang.Object

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

Constructor Detail

OpenMethodDispatcher

public OpenMethodDispatcher()

Method Detail

decorate

protected void decorate(IOpenMethod delegate)

Creates new instance of decorator.

Parameters:

delegate - method to decorate

getSignature

public IMethodSignature getSignature()

Gets the signature of method.

Specified by:

getSignature in interface IOpenMethodHeader

getDeclaringClass

public IOpenClass getDeclaringClass()

Gets the declaring class.

Specified by:

getDeclaringClass in interface IOpenMember

getInfo

public IMemberMetaInfo getInfo()

Gets null. The decorator hasn't info about overloaded methods.

Specified by:

getInfo in interface IOpenMember

getType

public IOpenClass getType()

Gets the type of method.

Specified by:

getType in interface IOpenMember

isStatic

public boolean isStatic()

Specified by:

isStatic in interface IOpenMember

isConstructor

public boolean isConstructor()

Specified by:

isConstructor in interface IOpenMethod

getDisplayName

public String getDisplayName(int mode)

Gets the user-friendly name.

Specified by:

getDisplayName in interface INamedThing

getName

public String getName()

Gets the method name.

Specified by:

getName in interface INamedThing

getMethod

public IOpenMethod getMethod()

Gets this. The decorator can't resolve which overloaded method should be returned.

Specified by:

getMethod in interface IMethodCaller

getCandidates

public List<IOpenMethod> getCandidates()

invoke

public Object invoke(Object target,
                     Object[] params,
                     IRuntimeEnv env)

Invokes appropriate method using runtime context.

Specified by:

invoke in interface Invokable

findMatchingMethod

public IOpenMethod findMatchingMethod(IRuntimeEnv env)

Finds appropriate method using runtime context. This method used to optimize runtime where the same method is used more that one time.

invokeInner

protected Object invokeInner(Object target,
                             Object[] params,
                             IRuntimeEnv env)

Invokes appropriate method using runtime context.

useActiveOrNewerVersion

protected IOpenMethod useActiveOrNewerVersion(IOpenMethod existedMethod,
                                              IOpenMethod newMethod,
                                              MethodKey key)

In case we have several versions of one table we should add only the newest or active version of table.

Parameters:

newMethod - The methods that we are trying to add.

key - Method key of these methods based on signature.

existedMethod - The existing method.

addMethod

public void addMethod(IOpenMethod candidate)

Try to add method as overloaded version of decorated method.

Parameters:

candidate - method to add

findMatchingMethod

protected abstract IOpenMethod findMatchingMethod(List<IOpenMethod> candidates,
                                                  IRuntimeContext context)

Resolve best matching method to invoke.

Parameters:

candidates - list of candidates

context - runtime context

Returns:

method to invoke

getTargetMethod

public IOpenMethod getTargetMethod()

getDispatcherTable

public abstract TableSyntaxNode getDispatcherTable()