- /*
- * The Apache Software License, Version 1.1
- *
- *
- * Copyright (c) 2001, 2002 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 com.sun.org.apache.xerces.internal.util;
-
- import java.io.InputStream;
- import java.io.IOException;
- import java.io.Reader;
-
- import com.sun.org.apache.xerces.internal.xni.XNIException;
- import com.sun.org.apache.xerces.internal.xni.XMLResourceIdentifier;
- import com.sun.org.apache.xerces.internal.xni.parser.XMLEntityResolver;
- import com.sun.org.apache.xerces.internal.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 1.5 2002/04/19 17:15:37 sandygao 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 resourceIdentifier contains the physical co-ordinates of the resource to be resolved
- *
- * @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(XMLResourceIdentifier resourceIdentifier)
- throws XNIException, IOException {
-
- // When both pubId and sysId are null, the user's entity resolver
- // can do nothing about it. We'd better not bother calling it.
- // This happens when the resourceIdentifier is a GrammarDescription,
- // which describes a schema grammar of some namespace, but without
- // any schema location hint. -Sg
- String pubId = resourceIdentifier.getPublicId();
- String sysId = resourceIdentifier.getExpandedSystemId();
- if (pubId == null && sysId == null)
- return null;
-
- // resolve entity using SAX entity resolver
- if (fEntityResolver != null && resourceIdentifier != null) {
- try {
- InputSource inputSource = fEntityResolver.resolveEntity(pubId, sysId);
- if (inputSource != null) {
- String publicId = inputSource.getPublicId();
- String systemId = inputSource.getSystemId();
- String baseSystemId = resourceIdentifier.getBaseSystemId();
- 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
- }