Package edu.ucsb.nceas.metacat

Class DBEntityResolver

java.lang.Object

edu.ucsb.nceas.metacat.DBEntityResolver

All Implemented Interfaces:

EntityResolver

public class DBEntityResolver
extends Object
implements EntityResolver

A database aware Class implementing EntityResolver interface for the SAX parser to call when processing the XML stream and intercepting any external entities (including the external DTD subset and external parameter entities, if any) before including them.

Constructor Summary

Constructors

Constructor	Description
DBEntityResolver()	Construct an instance of the DBEntityResolver class
DBEntityResolver(DefaultHandler handler, Reader dtd)	Construct an instance of the DBEntityResolver class

Method Summary

Modifier and Type	Method	Description
static InputStream	checkURLConnection(String systemId)	Check URL Connection for @systemId, and return an InputStream that can be used to read from the systemId URL.
InputSource	resolveEntity(String publicId, String systemId)	The Parser call this method before opening any external entity except the top-level document entity (including the external DTD subset, external entities referenced within the DTD, and external entities referenced within the document element)

Methods inherited from class java.lang.Object

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

Constructor Details

DBEntityResolver

public DBEntityResolver()

Construct an instance of the DBEntityResolver class

DBEntityResolver

public DBEntityResolver(DefaultHandler handler,
 Reader dtd)

Construct an instance of the DBEntityResolver class

Parameters:

handler - the SAX handler to determine parsing context

dtd - Reader of new dtd to be uploaded on server's file system

Method Details

resolveEntity

public InputSource resolveEntity(String publicId,
 String systemId)
                          throws SAXException,
IOException

The Parser call this method before opening any external entity except the top-level document entity (including the external DTD subset, external entities referenced within the DTD, and external entities referenced within the document element)

Specified by:

resolveEntity in interface EntityResolver

Throws:

SAXException

IOException

checkURLConnection

public static InputStream checkURLConnection(String systemId)
                                      throws SAXException

Check URL Connection for @systemId, and return an InputStream that can be used to read from the systemId URL. The parser ends up using this via the InputSource to read the DTD.

Parameters:

systemId - a URI (in practice URL) to be checked and opened

Throws:

SAXException