li.strolch.policy

Interface PolicyHandler

All Known Implementing Classes:

DefaultPolicyHandler

public interface PolicyHandler

The PolicyHandler is Strolch's mechanism of dependency injection

Objects which require delegation can use a PolicyConfiguration element and then retrieve a StrolchPolicy instance from this PolicyHandler.

PolicyConfiguration have a mapping of a policy type, i.e. an interface for a specific delegation. This interface has concrete implementations which are then returned by the PolicyHandler depending on the current configuration

The resolving of a policy instance is handled by a PolicyDefVisitor

Author:

Robert von Burg

Method Summary

Modifier and Type	Method and Description
<T extends StrolchPolicy> T	getPolicy(PolicyDef policyDef, StrolchTransaction tx) Instantiates the actual policy by resolving the PolicyDef using a PolicyDefVisitor

Method Detail

getPolicy

<T extends StrolchPolicy> T getPolicy(PolicyDef policyDef,
                                      StrolchTransaction tx)

Instantiates the actual policy by resolving the PolicyDef using a PolicyDefVisitor

Parameters:

policyDef - the PolicyDef referencing a concrete policy

tx - the current transaction for which the policy is instantiated

Returns:

the instantiated instance of the referenced policy