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

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 package com.sun.tools.internal.xjc.reader.xmlschema.bindinfo;

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

 import java.util.ArrayList;

 import org.xml.sax.Attributes;

 import org.xml.sax.ContentHandler;

 import org.xml.sax.Locator;

 import org.xml.sax.SAXException;

 import org.xml.sax.XMLFilter;

 import org.xml.sax.helpers.XMLFilterImpl;

 /**

  * {@link XMLFilter} that can fork an event to another {@link ContentHandler}

  * in the middle.

  *

  * <p>

  * The side handler receives SAX events before the next handler in the filter chain does.

  *

  * @author Kohsuke Kawaguchi

  */

 public class ForkingFilter extends XMLFilterImpl {

     /**

      * Non-null if we are also forking events to this handler.

      */

     private ContentHandler side;

     /**

      * The depth of the current element that the {@link #side} handler

      * is seeing.

      */

     private int depth;

     /**

      * In-scope namespace mapping.

      * namespaces[2n  ] := prefix

      * namespaces[2n+1] := namespace URI

      */

     private final ArrayList<String> namespaces = new ArrayList<String>();

     private Locator loc;

     public ForkingFilter() {

     }

     public ForkingFilter(ContentHandler next) {

         setContentHandler(next);

     }

     public ContentHandler getSideHandler() {

         return side;

     }

     @Override

     public void setDocumentLocator(Locator locator) {

         super.setDocumentLocator(locator);

         this.loc = locator;

     }

     public Locator getDocumentLocator() {

         return loc;

     }

     @Override

     public void startDocument() throws SAXException {

         reset();

         super.startDocument();

     }

     private void reset() {

         namespaces.clear();

         side = null;

         depth = 0;

     }

     @Override

     public void endDocument() throws SAXException {

         loc = null;

         reset();

         super.endDocument();

     }

     @Override

     public void startPrefixMapping(String prefix, String uri) throws SAXException {

         if (WellKnownNamespace.XML_NAMESPACE_URI.equals(uri)) return; //xml prefix shall not be declared based on jdk api javadoc

         if(side!=null)

             side.startPrefixMapping(prefix,uri);

         namespaces.add(prefix);

         namespaces.add(uri);

         super.startPrefixMapping(prefix,uri);

     }

     @Override

     public void endPrefixMapping(String prefix) throws SAXException {

         if ("xml".equals(prefix)) return; //xml prefix shall not be declared based on jdk api javadoc

         if(side!=null)

             side.endPrefixMapping(prefix);

         super.endPrefixMapping(prefix);

         namespaces.remove(namespaces.size()-1);

         namespaces.remove(namespaces.size()-1);

     }

     @Override

     public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {

         if(side!=null) {

             side.startElement(uri,localName,qName,atts);

             depth++;

         }

         super.startElement(uri, localName, qName, atts);

     }

     /**

      * Starts the event forking.

      */

     public void startForking(String uri, String localName, String qName, Attributes atts, ContentHandler side) throws SAXException {

         if(this.side!=null)     throw new IllegalStateException();  // can't fork to two handlers

         this.side = side;

         depth = 1;

         side.setDocumentLocator(loc);

         side.startDocument();

         for( int i=0; i<namespaces.size(); i+=2 )

             side.startPrefixMapping(namespaces.get(i),namespaces.get(i+1));

         side.startElement(uri,localName,qName,atts);

     }

     @Override

     public void endElement(String uri, String localName, String qName) throws SAXException {

         if(side!=null) {

             side.endElement(uri,localName,qName);

             depth--;

             if(depth==0) {

                 for( int i=namespaces.size()-2; i>=0; i-=2 )

                     side.endPrefixMapping(namespaces.get(i));

                 side.endDocument();

                 side = null;

             }

         }

         super.endElement(uri, localName, qName);

     }

     @Override

     public void characters(char ch[], int start, int length) throws SAXException {

         if(side!=null)

             side.characters(ch, start, length);

         super.characters(ch, start, length);

     }

     @Override

     public void ignorableWhitespace(char ch[], int start, int length) throws SAXException {

         if(side!=null)

             side.ignorableWhitespace(ch, start, length);

         super.ignorableWhitespace(ch, start, length);

     }

 }