| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 2001-2004 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 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.grammars.XMLGrammarDescription; |
| import com.sun.org.apache.xerces.internal.xni.parser.XMLEntityResolver; |
| import com.sun.org.apache.xerces.internal.xni.parser.XMLInputSource; |
| |
| import org.w3c.dom.ls.LSResourceResolver; |
| import org.w3c.dom.ls.LSInput; |
| |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.io.StringReader; |
| |
| |
| /** |
| * This class wraps DOM entity resolver to XNI entity resolver. |
| * |
| * @see LSResourceResolver |
| * |
| * @author Gopal Sharma, SUN MicroSystems Inc. |
| * @author Elena Litani, IBM |
| * @author Ramesh Mandava, Sun Microsystems |
| */ |
| public class DOMEntityResolverWrapper |
| implements XMLEntityResolver { |
| |
| // |
| // Data |
| // |
| |
| /** XML 1.0 type constant according to DOM L3 LS CR spec "http://www.w3.org/TR/2003/CR-DOM-Level-3-LS-20031107" */ |
| private static final String XML_TYPE = "http://www.w3.org/TR/REC-xml"; |
| |
| /** XML Schema constant according to DOM L3 LS CR spec "http://www.w3.org/TR/2003/CR-DOM-Level-3-LS-20031107" */ |
| private static final String XSD_TYPE = "http://www.w3.org/2001/XMLSchema"; |
| |
| /** The DOM entity resolver. */ |
| protected LSResourceResolver fEntityResolver; |
| |
| // |
| // Constructors |
| // |
| |
| /** Default constructor. */ |
| public DOMEntityResolverWrapper() {} |
| |
| /** Wraps the specified DOM entity resolver. */ |
| public DOMEntityResolverWrapper(LSResourceResolver entityResolver) { |
| setEntityResolver(entityResolver); |
| } // LSResourceResolver |
| |
| // |
| // Public methods |
| // |
| |
| /** Sets the DOM entity resolver. */ |
| public void setEntityResolver(LSResourceResolver entityResolver) { |
| fEntityResolver = entityResolver; |
| } // setEntityResolver(LSResourceResolver) |
| |
| /** Returns the DOM entity resolver. */ |
| public LSResourceResolver getEntityResolver() { |
| return fEntityResolver; |
| } // getEntityResolver():LSResourceResolver |
| |
| // |
| // XMLEntityResolver methods |
| // |
| |
| /** |
| * Resolves an external parsed entity. If the entity cannot be |
| * resolved, this method should return null. |
| * |
| * @param resourceIdentifier description of the resource to be revsoved |
| * @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 { |
| // resolve entity using DOM entity resolver |
| if (fEntityResolver != null) { |
| // For entity resolution the type of the resource would be XML TYPE |
| // DOM L3 LS spec mention only the XML 1.0 recommendation right now |
| LSInput inputSource = |
| resourceIdentifier == null |
| ? fEntityResolver.resolveResource( |
| null, |
| null, |
| null, |
| null, |
| null) |
| : fEntityResolver.resolveResource( |
| getType(resourceIdentifier), |
| resourceIdentifier.getNamespace(), |
| resourceIdentifier.getPublicId(), |
| resourceIdentifier.getLiteralSystemId(), |
| resourceIdentifier.getBaseSystemId()); |
| if (inputSource != null) { |
| String publicId = inputSource.getPublicId(); |
| String systemId = inputSource.getSystemId(); |
| String baseSystemId = inputSource.getBaseURI(); |
| InputStream byteStream = inputSource.getByteStream(); |
| Reader charStream = inputSource.getCharacterStream(); |
| String encoding = inputSource.getEncoding(); |
| String data = inputSource.getStringData(); |
| |
| /** |
| * An LSParser looks at inputs specified in LSInput in |
| * the following order: characterStream, byteStream, |
| * stringData, systemId, publicId. |
| */ |
| XMLInputSource xmlInputSource = |
| new XMLInputSource(publicId, systemId, baseSystemId); |
| |
| if (charStream != null) { |
| xmlInputSource.setCharacterStream(charStream); |
| } |
| else if (byteStream != null) { |
| xmlInputSource.setByteStream((InputStream) byteStream); |
| } |
| else if (data != null && data.length() != 0) { |
| xmlInputSource.setCharacterStream(new StringReader(data)); |
| } |
| xmlInputSource.setEncoding(encoding); |
| return xmlInputSource; |
| } |
| } |
| |
| // unable to resolve entity |
| return null; |
| |
| } // resolveEntity(String,String,String):XMLInputSource |
| |
| /** Determines the type of resource being resolved **/ |
| private String getType(XMLResourceIdentifier resourceIdentifier) { |
| if (resourceIdentifier instanceof XMLGrammarDescription) { |
| XMLGrammarDescription desc = (XMLGrammarDescription) resourceIdentifier; |
| if (XMLGrammarDescription.XML_SCHEMA.equals(desc.getGrammarType())) { |
| return XSD_TYPE; |
| } |
| } |
| return XML_TYPE; |
| } // getType(XMLResourceIdentifier):String |
| |
| } // DOMEntityResolverWrapper |