org.apache.torque.engine.database.transform
Class DTDResolver

java.lang.Object
  org.apache.torque.engine.database.transform.DTDResolver

All Implemented Interfaces:

EntityResolver

Direct Known Subclasses:

ImpexDTDResolver

public class DTDResolver
extends Object
implements EntityResolver

A resolver to get the database.dtd file for the XML parser from the jar.

Version:

$Id: DTDResolver.java,v 1.1 2007-10-21 07:57:26 abyrne Exp $

Author:

Martin Poeschl, Kurt Schrader, Quinton McCombs

Field Summary

private static org.apache.commons.logging.Log	log Logging class from commons.logging
static String	WEB_SITE_DTD Where the DTD is located on the web.
static String	WEB_SITE_DTD_3_2 Where the 3.2 DTD is located on the web.

Constructor Summary

DTDResolver()
constructor

Method Summary

private InputSource	readFromClasspath(String resourceName) Reads the resource with the given name from the classpath.
InputSource	resolveEntity(String publicId, String systemId) An implementation of the SAX EntityResolver interface to be called by the XML parser.

Methods inherited from class java.lang.Object

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

Field Detail

WEB_SITE_DTD

public static final String WEB_SITE_DTD

Where the DTD is located on the web.

See Also:

Constant Field Values

WEB_SITE_DTD_3_2

public static final String WEB_SITE_DTD_3_2

Where the 3.2 DTD is located on the web.

See Also:

Constant Field Values

log

private static org.apache.commons.logging.Log log

Logging class from commons.logging

Constructor Detail

DTDResolver

public DTDResolver()
            throws SAXException

constructor

Throws:

SAXException

Method Detail

resolveEntity

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

An implementation of the SAX EntityResolver interface to be called by the XML parser. If the dtd is the current Torque DTD, the DTD is read from the generator jar. In all other cases, null is returned to indicate that the parser should open a regular connection to the systemId URI.

Specified by:

resolveEntity in interface EntityResolver

Parameters:

publicId - The public identifier of the external entity

systemId - The system identifier of the external entity

Returns:

An InputSource for the database.dtd file in the generator jar, or null.

Throws:

IOException

SAXException

readFromClasspath

private InputSource readFromClasspath(String resourceName)
                               throws SAXException

Reads the resource with the given name from the classpath.

Parameters:

resourceName - the name of the resource to read

Returns:

an Inputsource witht the content of the resource.

Throws:

SAXException - if the resource cannot be read.