public class StandardCollectionURIResolver extends Object implements CollectionURIResolver
This supports two implementations of collections. If the URI supplied uses the "file:/" scheme, and the file that is referenced is a directory, then the collection is the set of files in that directory. Query parameters may be included in the URI:
recurse=yes|no controls whether the directory is scanned recursively;
strip-space=yes|no determines whether whitespace text nodes are stripped from the selected documents;
validation=strict|lax|preserve|strip determines whether schema validation is applied;
select=pattern determines which files in the directory are selected.
on-error=fail|warn|ignore determines the action taken if processing of a file fails
parser=qualified.class.name selects the parser (XMLReader) to be used to read the files
Otherwise, the resolver attempts to dereference the URI to obtain a catalog file. This is an XML file containing a list of documents, in the format:
<collection> <doc href="doc1.xml"/> <doc href="doc2.xml"/> </collection>
|Modifier and Type||Class and Description|
Mapping function to process the files in a directory.
|Constructor and Description|
|Modifier and Type||Method and Description|
Return a collection defined as a list of URIs in a catalog file
Return the contents of a collection that maps to a directory in filestore
Resolve a URI.
public SequenceIterator resolve(String href, String base, XPathContext context) throws XPathException
href- The relative URI of the collection. This corresponds to the argument supplied to the collection() function. If the collection() function was called with no arguments (to get the "default collection") this argument will be null.
base- The base URI that should be used. This is the base URI of the static context in which the call to collection() was made, typically the URI of the stylesheet or query module
context- The dynamic execution context
NodeInfo.). If xs:anyURI values are returned, the corresponding document will be retrieved as if by a call to the doc() function: this means that the system first checks to see if the document is already loaded, and if not, calls the registered URIResolver to dereference the URI. This is the recommended approach to ensure that the resulting collection is stable: however, it has the consequence that the documents will by default remain in memory for the duration of the query or transformation.
XPathException- if any failure occurs
protected URI makeAbsoluteURI(String href, String base, XPathContext context, URI relativeURI) throws XPathException
protected SequenceIterator directoryContents(File directory, URIQueryParameters params, XPathContext context)
directory- the directory to be processed
params- parameters indicating whether to process recursively, what to do on errors, and which files to select
context- the dynamic XPath evaluation context
protected SequenceIterator catalogContents(String href, String baseURI, String absURI, XPathContext context) throws XPathException
href- the relative URI as supplied
baseURI- the base URI
absURI- the absolute URI of the catalog file
context- the dynamic evaluation context
XPathException- if any failures occur
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