Mercurial > jdk8-mips64-public > jaxws / file revision

 /*

  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code 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

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 package com.sun.xml.internal.bind.v2.runtime.unmarshaller;

 import com.sun.xml.internal.bind.v2.WellKnownNamespace;

 import javax.xml.bind.annotation.DomHandler;

 import javax.xml.transform.Result;

 import javax.xml.transform.sax.TransformerHandler;

 import com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl;

 import org.xml.sax.SAXException;

 /**

  * Loads a DOM.

  *

  * @author Kohsuke Kawaguchi

  */

 public class DomLoader<ResultT extends Result> extends Loader {

     private final DomHandler<?,ResultT> dom;

     /**

      * Used to capture the state.

      *

      * This instance is created for each unmarshalling episode.

      */

     private final class State {

         /** This handler will receive SAX events. */

         private final TransformerHandler handler = JAXBContextImpl.createTransformerHandler();

         /** {@link #handler} will produce this result. */

         private final ResultT result;

         // nest level of elements.

         int depth = 1;

         public State( UnmarshallingContext context ) throws SAXException {

             result = dom.createUnmarshaller(context);

             handler.setResult(result);

             // emulate the start of documents

             try {

                 handler.setDocumentLocator(context.getLocator());

                 handler.startDocument();

                 declarePrefixes( context, context.getAllDeclaredPrefixes() );

             } catch( SAXException e ) {

                 context.handleError(e);

                 throw e;

             }

         }

         public Object getElement() {

             return dom.getElement(result);

         }

         private void declarePrefixes( UnmarshallingContext context, String[] prefixes ) throws SAXException {

             for( int i=prefixes.length-1; i>=0; i-- ) {

                 String nsUri = context.getNamespaceURI(prefixes[i]);

                 if(nsUri==null)     throw new IllegalStateException("prefix \'"+prefixes[i]+"\' isn't bound");

                 handler.startPrefixMapping(prefixes[i],nsUri );

             }

         }

         private void undeclarePrefixes( String[] prefixes ) throws SAXException {

             for( int i=prefixes.length-1; i>=0; i-- )

                 handler.endPrefixMapping( prefixes[i] );

         }

     }

     public DomLoader(DomHandler<?, ResultT> dom) {

         super(true);

         this.dom = dom;

     }

     @Override

     public void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException {

         UnmarshallingContext context = state.getContext();

         if (state.target == null)

             state.target = new State(context);

         State s = (State) state.target;

         try {

             s.declarePrefixes(context, context.getNewlyDeclaredPrefixes());

             s.handler.startElement(ea.uri, ea.local, ea.getQname(), ea.atts);

         } catch (SAXException e) {

             context.handleError(e);

             throw e;

         }

     }

     @Override

     public void childElement(UnmarshallingContext.State state, TagName ea) throws SAXException {

         state.loader = this;

         State s = (State) state.prev.target;

         s.depth++;

         state.target = s;

     }

     @Override

     public void text(UnmarshallingContext.State state, CharSequence text) throws SAXException {

         if(text.length()==0)

             return;     // there's no point in creating an empty Text node in DOM.

         try {

             State s = (State) state.target;

             s.handler.characters(text.toString().toCharArray(),0,text.length());

         } catch( SAXException e ) {

             state.getContext().handleError(e);

             throw e;

         }

     }

     @Override

     public void leaveElement(UnmarshallingContext.State state, TagName ea) throws SAXException {

         State s = (State) state.target;

         UnmarshallingContext context = state.getContext();

         try {

             s.handler.endElement(ea.uri, ea.local, ea.getQname());

             s.undeclarePrefixes(context.getNewlyDeclaredPrefixes());

         } catch( SAXException e ) {

             context.handleError(e);

             throw e;

         }

         if((--s.depth)==0) {

             // emulate the end of the document

             try {

                 s.undeclarePrefixes(context.getAllDeclaredPrefixes());

                 s.handler.endDocument();

             } catch( SAXException e ) {

                 context.handleError(e);

                 throw e;

             }

             // we are done

             state.target = s.getElement();

         }

     }

 }