| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 2001, 2002,2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| 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 |
| * |
| */ |
| 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, true); |
| 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 |
| } |