Package net.sf.saxon.lib

Class ChainedResourceResolver

java.lang.Object

net.sf.saxon.lib.ChainedResourceResolver

All Implemented Interfaces:

ResourceResolver

public class ChainedResourceResolver
extends Object
implements ResourceResolver

An ResourceResolver that first tries one supplied ResourceResolver, and if that returns null, falls back to another. Either ResourceResolver may itself be a ChainedResourceResolver, so a chain of any length can be established.

Since:

11.1

Constructor Summary

Constructors

Constructor	Description
ChainedResourceResolver(ResourceResolver first, ResourceResolver second)	Create a composite entity resolver

Method Summary

Modifier and Type	Method	Description
Source	resolve(ResourceRequest request)	Process a resource request to deliver a resource

Methods inherited from class java.lang.Object

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

Constructor Details

ChainedResourceResolver

public ChainedResourceResolver(ResourceResolver first,
 ResourceResolver second)

Create a composite entity resolver

Parameters:

first - the first entity resolver to be used

second - the entity resolver to be used if the first one returns null

Method Details

resolve

public Source resolve(ResourceRequest request)
               throws XPathException

Description copied from interface: ResourceResolver

Process a resource request to deliver a resource

Specified by:

resolve in interface ResourceResolver

Parameters:

request - the resource request

Returns:

the returned Source; or null to delegate resolution to another resolver. The type of Source must correspond to the type of resource requested: for non-XML resources, it should generally be a StreamSource.

Throws:

XPathException - if the request is invalid in some way, or if the identified resource is unsuitable, or if resolution is to fail rather than being delegated to another resolver.