1 /*
   2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.xml.internal.bind.v2.runtime.output;
  27 
  28 import java.io.IOException;
  29 
  30 import javax.xml.stream.XMLEventFactory;
  31 import javax.xml.stream.XMLEventWriter;
  32 import javax.xml.stream.XMLStreamException;
  33 import javax.xml.stream.events.Attribute;
  34 import javax.xml.stream.events.Characters;
  35 
  36 import com.sun.xml.internal.bind.v2.runtime.XMLSerializer;
  37 
  38 import org.xml.sax.SAXException;
  39 
  40 /**
  41  * {@link XmlOutput} that writes to StAX {@link XMLEventWriter}.
  42  *
  43  * @author Kohsuke Kawaguchi
  44  */
  45 public class XMLEventWriterOutput extends XmlOutputAbstractImpl {
  46     private final XMLEventWriter out;
  47     private final XMLEventFactory ef;
  48 
  49     /** One whitespace. */
  50     private final Characters sp;
  51 
  52     public XMLEventWriterOutput(XMLEventWriter out) {
  53         this.out = out;
  54         ef = XMLEventFactory.newInstance();
  55         sp = ef.createCharacters(" ");
  56     }
  57 
  58     // not called if we are generating fragments
  59     @Override
  60     public void startDocument(XMLSerializer serializer, boolean fragment, int[] nsUriIndex2prefixIndex, NamespaceContextImpl nsContext) throws IOException, SAXException, XMLStreamException {
  61         super.startDocument(serializer, fragment,nsUriIndex2prefixIndex,nsContext);
  62         if(!fragment)
  63             out.add(ef.createStartDocument());
  64     }
  65 
  66     public void endDocument(boolean fragment) throws IOException, SAXException, XMLStreamException {
  67         if(!fragment) {
  68             out.add(ef.createEndDocument());
  69             out.flush();
  70         }
  71         super.endDocument(fragment);
  72     }
  73 
  74     public void beginStartTag(int prefix, String localName) throws IOException, XMLStreamException {
  75         out.add(
  76             ef.createStartElement(
  77                 nsContext.getPrefix(prefix),
  78                 nsContext.getNamespaceURI(prefix),
  79                 localName));
  80 
  81         NamespaceContextImpl.Element nse = nsContext.getCurrent();
  82         if(nse.count()>0) {
  83             for( int i=nse.count()-1; i>=0; i-- ) {
  84                 String uri = nse.getNsUri(i);
  85                 if(uri.length()==0 && nse.getBase()==1)
  86                     continue;   // no point in definint xmlns='' on the root
  87                 out.add(ef.createNamespace(nse.getPrefix(i),uri));
  88             }
  89         }
  90     }
  91 
  92     public void attribute(int prefix, String localName, String value) throws IOException, XMLStreamException {
  93         Attribute att;
  94         if(prefix==-1)
  95             att = ef.createAttribute(localName,value);
  96         else
  97             att = ef.createAttribute(
  98                     nsContext.getPrefix(prefix),
  99                     nsContext.getNamespaceURI(prefix),
 100                     localName, value);
 101 
 102         out.add(att);
 103     }
 104 
 105     public void endStartTag() throws IOException, SAXException {
 106         // noop
 107     }
 108 
 109     public void endTag(int prefix, String localName) throws IOException, SAXException, XMLStreamException {
 110         out.add(
 111             ef.createEndElement(
 112                 nsContext.getPrefix(prefix),
 113                 nsContext.getNamespaceURI(prefix),
 114                 localName));
 115     }
 116 
 117     public void text(String value, boolean needsSeparatingWhitespace) throws IOException, SAXException, XMLStreamException {
 118         if(needsSeparatingWhitespace)
 119             out.add(sp);
 120         out.add(ef.createCharacters(value));
 121     }
 122 
 123     public void text(Pcdata value, boolean needsSeparatingWhitespace) throws IOException, SAXException, XMLStreamException {
 124         text(value.toString(),needsSeparatingWhitespace);
 125     }
 126 }