org.neo4j.graphdb
Interface DependencyResolver

All Known Implementing Classes:

DependencyResolver.Adapter, KernelExtensions

public interface DependencyResolver

Find a dependency given a type. This can be the exact type or a super type of the actual dependency.

Nested Class Summary

static class	DependencyResolver.Adapter Adapter for DependencyResolver which will select the first available candidate by default for DependencyResolver.Adapter.resolveDependency(Class).
static interface	DependencyResolver.SelectionStrategy<T> Responsible for making the choice between available candidates.

Method Summary

<T> T	resolveDependency(Class<T> type) Tries to resolve a dependency that matches a given class.
<T> T	resolveDependency(Class<T> type, DependencyResolver.SelectionStrategy<T> selector) Tries to resolve a dependency that matches a given class.

Method Detail

resolveDependency

<T> T resolveDependency(Class<T> type)
                    throws IllegalArgumentException

Tries to resolve a dependency that matches a given class. No specific DependencyResolver.SelectionStrategy is used, so the first encountered matching dependency will be returned.

Parameters:

type - the type of Class that the returned instance must implement.

Returns:

the resolved dependency for the given type.

Throws:

IllegalArgumentException - if no matching dependency was found.

resolveDependency

<T> T resolveDependency(Class<T> type,
                        DependencyResolver.SelectionStrategy<T> selector)
                    throws IllegalArgumentException

Tries to resolve a dependency that matches a given class. All candidates are fed to the selector which ultimately becomes responsible for making the choice between all available candidates.

Parameters:

type - the type of Class that the returned instance must implement.

selector - DependencyResolver.SelectionStrategy which will make the choice of which one to return among matching candidates.

Returns:

the resolved dependency for the given type.

Throws:

IllegalArgumentException - if no matching dependency was found.