content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * 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 jaxp.sun.org.apache.xerces.internal.util;
  
  import java.io.InputStream;
  import java.io.IOException;
  import java.io.Reader;
  
  import jaxp.sun.org.apache.xerces.internal.xni.XNIException;
  import jaxp.sun.org.apache.xerces.internal.xni.XMLResourceIdentifier;
  import jaxp.sun.org.apache.xerces.internal.xni.parser.XMLEntityResolver;
  import jaxp.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);
                      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
  }
  