Interface LSResourceResolver
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public interface LSResourceResolverLSResourceResolverprovides a way for applications to redirect references to external resources.Applications needing to implement custom handling for external resources can implement this interface and register their implementation by setting the "resource-resolver" parameter of
DOMConfigurationobjects attached toLSParserandLSSerializer. It can also be register onDOMConfigurationobjects attached toDocumentif the "LS" feature is supported.The
LSParserwill then allow the application to intercept any external entities, including the external DTD subset and external parameter entities, before including them. The top-level document entity is never passed to theresolveResourcemethod.Many DOM applications will not need to implement this interface, but it will be especially useful for applications that build XML documents from databases or other specialized input sources, or for applications that use URNs.
Note:
LSResourceResolveris based on the SAX2 [SAX]EntityResolverinterface.See also the Document Object Model (DOM) Level 3 Load and Save Specification.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method and Description LSInputresolveResource(String type, String namespaceURI, String publicId, String systemId, String baseURI)Allow the application to resolve external resources.
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Method Detail
resolveResource
LSInput resolveResource(String type, String namespaceURI, String publicId, String systemId, String baseURI)
Allow the application to resolve external resources.
TheLSParserwill call this method before opening any external resource, including the external DTD subset, external entities referenced within the DTD, and external entities referenced within the document element (however, the top-level document entity is not passed to this method). The application may then request that theLSParserresolve the external resource itself, that it use an alternative URI, or that it use an entirely different input source.
Application writers can use this method to redirect external system identifiers to secure and/or local URI, to look up public identifiers in a catalogue, or to read an entity from a database or other input source (including, for example, a dialog box).- Parameters:
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type- The type of the resource being resolved. For XML [XML 1.0] resources (i.e. entities), applications must use the value"http://www.w3.org/TR/REC-xml". For XML Schema [XML Schema Part 1] , applications must use the value"http://www.w3.org/2001/XMLSchema". Other types of resources are outside the scope of this specification and therefore should recommend an absolute URI in order to use this method. -
namespaceURI- The namespace of the resource being resolved, e.g. the target namespace of the XML Schema [XML Schema Part 1] when resolving XML Schema resources. -
publicId- The public identifier of the external entity being referenced, ornullif no public identifier was supplied or if the resource is not an entity. -
systemId- The system identifier, a URI reference [IETF RFC 2396], of the external resource being referenced, ornullif no system identifier was supplied. -
baseURI- The absolute base URI of the resource being parsed, ornullif there is no base URI. - Returns:
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A
LSInputobject describing the new input source, ornullto request that the parser open a regular URI connection to the resource.
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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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