ResourceResolverSpi (Apache XML Security for Java 4.0.4 API)

java.lang.Object
- org.apache.xml.security.utils.resolver.ResourceResolverSpi

Direct Known Subclasses:

ResolverAnonymous, ResolverDirectHTTP, ResolverFragment, ResolverLocalFilesystem, ResolverXPointer
```
public abstract class ResourceResolverSpi
extends Object
```
During reference validation, we have to retrieve resources from somewhere. Extensions of this class must be thread-safe.

Constructor Summary

Constructors
Constructor Description

ResourceResolverSpi()

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`abstract boolean`	`engineCanResolveURI(ResourceResolverContext context)`	This method helps the `ResourceResolver` to decide whether a `ResourceResolverSpi` is able to perform the requested action.
`abstract XMLSignatureInput`	`engineResolveURI(ResourceResolverContext context)`	This is the workhorse method used to resolve resources.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ResourceResolverSpi
```
public ResourceResolverSpi()
```
- Method Detail
  - engineResolveURI
```
public abstract XMLSignatureInput engineResolveURI(ResourceResolverContext context)
                                            throws ResourceResolverException
```
    This is the workhorse method used to resolve resources.
    
    Parameters:
    
    context - Context to use to resolve resources.
    
    Returns:
    
    the resource wrapped around a XMLSignatureInput
    
    Throws:
    
    ResourceResolverException
  - engineCanResolveURI
```
public abstract boolean engineCanResolveURI(ResourceResolverContext context)
```
    This method helps the ResourceResolver to decide whether a ResourceResolverSpi is able to perform the requested action.
    
    Parameters:
    
    context - Context in which to do resolution.
    
    Returns:
    
    true if the engine can resolve the uri