content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 mf.org.apache.xerces.impl.xs;
  
  import org.xml.sax.ContentHandler;
  import org.xml.sax.InputSource;
  import org.xml.sax.SAXException;
  
  import java.io.IOException;
  import java.io.StringReader;
  
  import mf.org.apache.xerces.dom.CoreDocumentImpl;
  import mf.org.apache.xerces.parsers.DOMParser;
  import mf.org.apache.xerces.parsers.SAXParser;
  import mf.org.apache.xerces.xs.XSAnnotation;
  import mf.org.apache.xerces.xs.XSConstants;
  import mf.org.apache.xerces.xs.XSNamespaceItem;
  import mf.org.w3c.dom.Document;
  import mf.org.w3c.dom.Element;
  import mf.org.w3c.dom.Node;
  
  /**
   * This is an implementation of the XSAnnotation schema component.
   *
   * @version $Id: XSAnnotationImpl.java 699892 2008-09-28 21:08:27Z mrglavas $
   * @xerces.internal
   */
  public class XSAnnotationImpl implements XSAnnotation {
  
      // Data
  
      // the content of the annotation node, including all children, along
      // with any non-schema attributes from its parent
      private String fData = null;
  
      // the grammar which owns this annotation; we get parsers
      // from here when we need them
      private SchemaGrammar fGrammar = null;
  
      // constructors
      public XSAnnotationImpl(String contents, SchemaGrammar grammar) {
          fData = contents;
          fGrammar = grammar;
      }
  
      /**
       * Write contents of the annotation to the specified DOM object. If the
       * specified <code>target</code> object is a DOM in-scope namespace
       * declarations for <code>annotation</code> element are added as
       * attributes nodes of the serialized <code>annotation</code>, otherwise
       * the corresponding events for all in-scope namespace declaration are
       * sent via specified document handler.
       *
       * @param target     A target pointer to the annotation target object, i.e.
       *                   <code>org.w3c.dom.Document</code>,
       *                   <code>org.xml.sax.ContentHandler</code>.
       * @param targetType A target type.
       * @return If the <code>target</code> is recognized type and supported by
       * this implementation return true, otherwise return false.
       */
      @Override
      public boolean writeAnnotation(Object target,
                                     short targetType) {
          if (targetType == XSAnnotation.W3C_DOM_ELEMENT || targetType == XSAnnotation.W3C_DOM_DOCUMENT) {
              writeToDOM((Node) target, targetType);
              return true;
          } else if (targetType == SAX_CONTENTHANDLER) {
              writeToSAX((ContentHandler) target);
              return true;
          }
          return false;
      }
  
      /**
       * A text representation of annotation.
       */
      @Override
      public String getAnnotationString() {
          return fData;
      }
  
      // XSObject methods
  
      /**
       * The <code>type</code> of this object, i.e.
       * <code>ELEMENT_DECLARATION</code>.
       */
      @Override
      public short getType() {
          return XSConstants.ANNOTATION;
      }
  
      /**
       * The name of type <code>NCName</code> of this declaration as defined in
       * XML Namespaces.
       */
      @Override
      public String getName() {
          return null;
      }
  
      /**
       * The [target namespace] of this object, or <code>null</code> if it is
       * unspecified.
       */
      @Override
      public String getNamespace() {
          return null;
      }
  
      /**
       * A namespace schema information item corresponding to the target
       * namespace of the component, if it's globally declared; or null
       * otherwise.
       */
      @Override
      public XSNamespaceItem getNamespaceItem() {
          return null;
      }
  
      // private methods
      private synchronized void writeToSAX(ContentHandler handler) {
          // nothing must go wrong with this parse...
          SAXParser parser = fGrammar.getSAXParser();
          StringReader aReader = new StringReader(fData);
          InputSource aSource = new InputSource(aReader);
          parser.setContentHandler(handler);
          try {
              parser.parse(aSource);
          } catch (SAXException e) {
              // this should never happen!
              // REVISIT:  what to do with this?; should really not
              // eat it...
          } catch (IOException i) {
              // ditto with above
          }
          // Release the reference to the user's ContentHandler.
          parser.setContentHandler(null);
      }
  
      // this creates the new Annotation element as the first child
      // of the Node
      private synchronized void writeToDOM(Node target, short type) {
          Document futureOwner = (type == XSAnnotation.W3C_DOM_ELEMENT) ?
                  target.getOwnerDocument() : (Document) target;
          DOMParser parser = fGrammar.getDOMParser();
          StringReader aReader = new StringReader(fData);
          InputSource aSource = new InputSource(aReader);
          try {
              parser.parse(aSource);
          } catch (SAXException e) {
              // this should never happen!
              // REVISIT:  what to do with this?; should really not
              // eat it...
          } catch (IOException i) {
              // ditto with above
          }
          Document aDocument = parser.getDocument();
          parser.dropDocumentReferences();
          Element annotation = aDocument.getDocumentElement();
          Node newElem = null;
          if (futureOwner instanceof CoreDocumentImpl) {
              newElem = futureOwner.adoptNode(annotation);
              // adoptNode will return null when the DOM implementations are not compatible.
              if (newElem == null) {
                  newElem = futureOwner.importNode(annotation, true);
              }
          } else {
              newElem = futureOwner.importNode(annotation, true);
          }
          target.insertBefore(newElem, target.getFirstChild());
      }
  
  }
  