org.opensaml.saml.common.binding

Class AbstractEndpointResolver<EndpointType extends Endpoint>

java.lang.Object

net.shibboleth.utilities.java.support.component.AbstractInitializableComponent

net.shibboleth.utilities.java.support.component.AbstractIdentifiedInitializableComponent

org.opensaml.saml.common.binding.AbstractEndpointResolver<EndpointType>

Type Parameters:

EndpointType - type of endpoint

All Implemented Interfaces:

Component, DestructableComponent, IdentifiedComponent, InitializableComponent, Resolver<EndpointType,CriteriaSet>, EndpointResolver<EndpointType>

public abstract class AbstractEndpointResolver<EndpointType extends Endpoint>
extends AbstractIdentifiedInitializableComponent
implements EndpointResolver<EndpointType>

Base implementation that resolves and validates protocol/profile endpoints using a combination of supplied parameters and SAML metadata.

SAML metadata rules are followed for deriving candidate endpoints to evaluate. The base class implements only a subset of required functionality, then extracts a set of candidates from metadata if present, and delegates to a subclass to actually evaluate each one for acceptability.

The supported Criterion types and their use follows:

EndpointCriterion (required)

Contains a "template" for the eventual Endpoint(s) to resolve that identifies at minimum the type of endpoint object (via schema type or element name) to resolve. It MAY contain other attributes that will be used in matching candidate endpoints for suitability, such as index, binding, location, etc. If so marked, it may also be resolved as a trusted endpoint without additional verification required.

RoleDescriptorCriterion

If present, provides access to the candidate endpoint(s) to attempt resolution against. Strictly optional, but if absent, the supplied endpoint (from EndpointCriterion) is returned as the sole result, whatever its completeness/usability, allowing for subclass validation.

Subclasses should override the {doCheckEndpoint(CriteriaSet, Endpoint) method to implement further criteria.

Field Summary

Fields

Modifier and Type	Field and Description
private org.slf4j.Logger	log Class logger.

Constructor Summary

Constructors

Constructor and Description
AbstractEndpointResolver() Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
private boolean	canUseRequestedEndpoint(CriteriaSet criteria) Optimize the case of resolving a single endpoint if a populated endpoint is supplied via criteria, and validation is unnecessary due to a signed request.
protected boolean	doCheckEndpoint(CriteriaSet criteria, EndpointType endpoint) Apply the supplied criteria to a candidate endpoint to determine its suitability.
private List<EndpointType>	getCandidatesFromMetadata(CriteriaSet criteria) Get a mutable list of endpoints of a given type found in the metadata role contained in a RoleDescriptorCriterion (or an empty list if no metadata exists).
protected String	getLogPrefix() Return a prefix for logging messages for this component.
Iterable<EndpointType>	resolve(CriteriaSet criteria)
EndpointType	resolveSingle(CriteriaSet criteria)
private List<EndpointType>	sortCandidates(List<Endpoint> candidates) Copy and sort the endpoints such that the default endpoint by SAML rules comes first.
private void	validateCriteria(CriteriaSet criteria) Verify that the required EndpointCriterion is present.

Methods inherited from class net.shibboleth.utilities.java.support.component.AbstractIdentifiedInitializableComponent

doInitialize, getId, setId

Methods inherited from class net.shibboleth.utilities.java.support.component.AbstractInitializableComponent

destroy, doDestroy, initialize, isDestroyed, isInitialized

Methods inherited from class java.lang.Object

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

Field Detail

log

@Nonnull
private org.slf4j.Logger log

Class logger.

Constructor Detail

AbstractEndpointResolver

public AbstractEndpointResolver()

Constructor.

Method Detail

resolve

@Nonnull
@NonnullElements
public Iterable<EndpointType> resolve(@Nullable
                                                     CriteriaSet criteria)
                                                throws ResolverException

Specified by:

resolve in interface Resolver<EndpointType extends Endpoint,CriteriaSet>

Throws:

ResolverException

resolveSingle

@Nullable
public EndpointType resolveSingle(@Nullable
                                  CriteriaSet criteria)
                                            throws ResolverException

Specified by:

resolveSingle in interface Resolver<EndpointType extends Endpoint,CriteriaSet>

Throws:

ResolverException

doCheckEndpoint

protected boolean doCheckEndpoint(@Nonnull
                      CriteriaSet criteria,
                      @Nonnull
                      EndpointType endpoint)

Apply the supplied criteria to a candidate endpoint to determine its suitability.

Parameters:

criteria - input criteria set

endpoint - candidate endpoint

Returns:

true iff the endpoint meets the supplied criteria

validateCriteria

private void validateCriteria(@Nullable
                    CriteriaSet criteria)
                       throws ResolverException

Verify that the required EndpointCriterion is present.

Parameters:

criteria - input criteria set

Throws:

ResolverException - if the input set is null or no EndpointCriterion is present

canUseRequestedEndpoint

private boolean canUseRequestedEndpoint(@Nonnull
                              CriteriaSet criteria)

Optimize the case of resolving a single endpoint if a populated endpoint is supplied via criteria, and validation is unnecessary due to a signed request. Note that this endpoint may turn out to be unusable by the caller, but that's immaterial because the requester must have dictated the binding and location, so we're not allowed to ignore that.

Parameters:

criteria - input criteria set

Returns:

true iff the supplied endpoint via EndpointCriterion should be returned

getCandidatesFromMetadata

@Nonnull
@NonnullElements
private List<EndpointType> getCandidatesFromMetadata(@Nonnull
                                                                   CriteriaSet criteria)

Get a mutable list of endpoints of a given type found in the metadata role contained in a RoleDescriptorCriterion (or an empty list if no metadata exists).

The endpoint type to extract is based on the candidate endpoint in an EndpointCriterion. If the endpoints are indexed, the first list entry will contain the default endpoint to use in the absence of other limiting criteria.

Parameters:

criteria - input criteria set

Returns:

mutable list of endpoints from the metadata

sortCandidates

@Nonnull
@NonnullElements
private List<EndpointType> sortCandidates(@Nonnull@NonnullElements
                                                        List<Endpoint> candidates)

Copy and sort the endpoints such that the default endpoint by SAML rules comes first.

Parameters:

candidates - input list of endpoints

Returns:

a new list containing the endpoints such that the default is first

getLogPrefix

@Nonnull
protected String getLogPrefix()

Return a prefix for logging messages for this component.

Returns:

a string for insertion at the beginning of any log messages