/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2001 The Apache Software Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.apache.org. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xerces.util;
import java.io.InputStream;
import java.io.IOException;
import java.io.Reader;
import org.apache.xerces.xni.XNIException;
import org.apache.xerces.xni.parser.XMLEntityResolver;
import org.apache.xerces.xni.parser.XMLInputSource;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
/**
* This class wraps a SAX entity resolver in an XNI entity resolver.
*
* @see EntityResolver
*
* @author Andy Clark, IBM
*
* @version $Id: EntityResolverWrapper.java,v 1.2 2001/08/23 00:35:32 lehors Exp $
*/
public class EntityResolverWrapper
implements XMLEntityResolver {
//
// Data
//
/** The SAX entity resolver. */
protected EntityResolver fEntityResolver;
//
// Constructors
//
/** Default constructor. */
public EntityResolverWrapper() {}
/** Wraps the specified SAX entity resolver. */
public EntityResolverWrapper(EntityResolver entityResolver) {
setEntityResolver(entityResolver);
} // <init>(EntityResolver)
//
// Public methods
//
/** Sets the SAX entity resolver. */
public void setEntityResolver(EntityResolver entityResolver) {
fEntityResolver = entityResolver;
} // setEntityResolver(EntityResolver)
/** Returns the SAX entity resolver. */
public EntityResolver getEntityResolver() {
return fEntityResolver;
} // getEntityResolver():EntityResolver
//
// XMLEntityResolver methods
//
/**
* Resolves an external parsed entity. If the entity cannot be
* resolved, this method should return null.
*
* @param publicId
* @param systemId
* @param baseSystemId The base system identifier.
*
* @throws XNIException Thrown on general error.
* @throws IOException Thrown if resolved entity stream cannot be
* opened or some other i/o error occurs.
*/
public XMLInputSource resolveEntity(String publicId, String systemId,
String baseSystemId)
throws XNIException, IOException {
// resolve entity using SAX entity resolver
if (fEntityResolver != null) {
try {
InputSource inputSource =
fEntityResolver.resolveEntity(publicId, systemId);
if (inputSource != null) {
publicId = inputSource.getPublicId();
systemId = inputSource.getSystemId();
InputStream byteStream = inputSource.getByteStream();
Reader charStream = inputSource.getCharacterStream();
String encoding = inputSource.getEncoding();
XMLInputSource xmlInputSource =
new XMLInputSource(publicId, systemId, baseSystemId);
xmlInputSource.setByteStream(byteStream);
xmlInputSource.setCharacterStream(charStream);
xmlInputSource.setEncoding(encoding);
return xmlInputSource;
}
}
// error resolving entity
catch (SAXException e) {
Exception ex = e.getException();
if (ex == null) {
ex = e;
}
throw new XNIException(ex);
}
}
// unable to resolve entity
return null;
} // resolveEntity(String,String,String):XMLInputSource
}